What are the cheapest airlines to fly from Illinois to London one-way?

£213 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on Icelandair and WestJet, with prices starting from £219 and £278, respectively.

What are the most popular routes from Illinois to London?

When deciding which route to take from Illinois to London consider Chicago O'Hare Intl - London Heathrow, Chicago O'Hare Intl - London Gatwick or Chicago O'Hare Intl - London City as they are the most popular.

What are the cheapest flights from Illinois to London?

Looking for the cheapest flight from Illinois to London? While on average our users pay £2,784, our data indicates the cheapest price to be £305. The most popular route (Chicago O'Hare Intl - London Heathrow), is priced around £383.

What are the most reliable airlines from Illinois to London?

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Illinois to London on time: Aer Lingus (80%), Air Canada (74%), Austrian Airlines (74%).

What are the most popular airlines that fly from Illinois to London?

Before booking your flight from Illinois to London check out the most popular airlines for this route: American Airlines, Finnair or British Airways.

How far in advance should I book a flight from Illinois to London?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 60 days in advance, which can save you up to 13% on flights from Illinois to London compared to booking the week you need them. Waiting 60 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at £591. For sooner than that we have options available in the next 3 days from £601.

What is the cheapest month to fly from Illinois to London?

Flights from Illinois to London lean towards being more expensive in June. Prices are generally better when you fly from Illinois to London in February, with the cheapest ticket starting at £375.

Can I find deals for flights from Illinois to London that include hotel bookings?

Yes. In addition to deals on Illinois to London flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Illinois to London?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to London.

Can I find deals for business class flights from Illinois to London?

Yes. Cheapflights offers flight deals from Illinois to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£211+ Flights from Illinois to London

Cheap flight deals from Illinois to London

Round-trip from	£463
One-way from	£211
Popular in	June
Cheapest in	February
Average price	£516
Good round-trip deal	£492 or less
Good one-way deal	£322 or less

Finnair
1/4-29/4
1 total stop
21h 25m total
Illinois to London

Search Deals

23/4
2 total stops
32h 25m total
Illinois to London

Search Deals

Highest demand for flights based on searches. 18% potential increase in price (£112 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£17 potential savings vs. average return price).

Search Deals

Average for round-trip flights in February 2025

Search Deals

Price to beat on a round-trip flight from Illinois to London (LON).

Search Deals

Price to beat on a one-way flight from Illinois to London (LON).

Search Deals

Find flight deals from Illinois to London

Cheapest flights from Illinois to London
Explore the most affordable flight options available from Illinois to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 February 2025.

Tue 1/416:55ORD - LHR

Nonstop7h 55mFinnair

Tue 29/410:20LHR - ORD

1 stop13h 30mFinnair

Deal found 21/2£463

Wed 2/419:30ORD - LGW

1 stop10h 15mIcelandair

Sun 20/415:40LGW - ORD

1 stop11h 35mIcelandair

Deal found 20/2£463

Sun 6/419:15ORD - STN

2 stops20h 00mMultiple Airlines

Sun 13/410:35STN - ORD

2 stops35h 35mMultiple Airlines

Deal found 20/2£463

Tue 25/218:30ORD - LHR

1 stop10h 20mIcelandair

Tue 4/312:15LHR - ORD

1 stop11h 05mIcelandair

Deal found 21/2£464

Thu 3/421:01ORD - LGW

2 stops27h 59mMultiple Airlines

Thu 24/414:00LGW - ORD

1 stop15h 39mMultiple Airlines

Deal found 20/2£464

Sun 9/320:55ORD - LHR

2 stops15h 05mScandinavian Airlines

Sun 16/321:05LHR - ORD

2 stops26h 45mScandinavian Airlines

Deal found 21/2£465

Tue 22/417:45ORD - LHR

Nonstop7h 35mIberia

Wed 30/410:00LHR - ORD

1 stop13h 39mIberia

Deal found 21/2£466

Tue 1/420:50ORD - LHR

1 stop10h 35mAer Lingus

Tue 29/412:00LHR - ORD

1 stop13h 00mAer Lingus

Deal found 21/2£467

Sun 9/321:25ORD - LGW

2 stops18h 15mTAP AIR PORTUGAL

Tue 18/316:35LGW - ORD

1 stop28h 55mTAP AIR PORTUGAL

Deal found 19/2£469

Tue 1/419:30ORD - LTN

2 stops21h 25mMultiple Airlines

Wed 23/406:05LTN - ORD

3 stops31h 59mMultiple Airlines

Deal found 20/2£471

Sun 9/310:25ORD - LHR

1 stop15h 25mVirgin Atlantic

Tue 18/309:00LHR - ORD

1 stop12h 05mVirgin Atlantic

Deal found 19/2£479

Sun 2/320:25ORD - LHR

1 stop19h 10mTAP AIR PORTUGAL

Tue 11/318:30LHR - ORD

1 stop27h 00mTAP AIR PORTUGAL

Deal found 21/2£480

Best flights from Illinois to London
Discover carefully curated flight deals from Illinois to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 February 2025.

Tue 1/416:55ORD - LHR

Nonstop7h 55mFinnair

Tue 29/410:20LHR - ORD

1 stop13h 30mFinnair

Deal found 21/2£463

Wed 2/419:30ORD - LGW

1 stop10h 15mIcelandair

Sun 20/415:40LGW - ORD

1 stop11h 35mIcelandair

Deal found 20/2£463

Sun 6/419:15ORD - STN

2 stops20h 00mMultiple Airlines

Sun 13/410:35STN - ORD

2 stops35h 35mMultiple Airlines

Deal found 20/2£463

Sun 9/320:55ORD - LHR

2 stops15h 05mScandinavian Airlines

Sun 16/321:05LHR - ORD

2 stops26h 45mScandinavian Airlines

Deal found 21/2£465

Tue 22/417:45ORD - LHR

Nonstop7h 35mIberia

Wed 30/410:00LHR - ORD

1 stop13h 39mIberia

Deal found 21/2£466

Tue 1/420:50ORD - LHR

1 stop10h 35mAer Lingus

Tue 29/412:00LHR - ORD

1 stop13h 00mAer Lingus

Deal found 21/2£467

Sun 9/321:25ORD - LGW

2 stops18h 15mTAP AIR PORTUGAL

Tue 18/316:35LGW - ORD

1 stop28h 55mTAP AIR PORTUGAL

Deal found 19/2£469

Sun 9/310:25ORD - LHR

1 stop15h 25mVirgin Atlantic

Tue 18/309:00LHR - ORD

1 stop12h 05mVirgin Atlantic

Deal found 19/2£479

Mon 10/320:05ORD - LCY

1 stop11h 45mSWISS

Tue 18/309:15LCY - ORD

1 stop13h 00mSWISS

Deal found 20/2£481

Mon 7/421:20ORD - LHR

Nonstop8h 25mUnited Airlines

Mon 14/408:40LHR - ORD

1 stop13h 15mUnited Airlines

Deal found 21/2£488

Wed 5/314:00ORD - LHR

1 stop12h 45mDelta

Sun 9/306:30LHR - ORD

1 stop14h 00mDelta

Deal found 20/2£493

Tue 1/414:55MDW - LHR

1 stop12h 00mAir France

Tue 8/415:15LHR - MDW

1 stop13h 06mAir France

Deal found 20/2£497

Direct flights from Illinois to London
Explore direct flight options from Illinois to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 21 February 2025.

Sun 9/321:15ORD - LHR

Nonstop7h 45mIberia

Tue 18/313:50LHR - ORD

Nonstop8h 50mIberia

Deal found 19/2£464

Tue 1/416:55ORD - LHR

Nonstop7h 55mFinnair

Wed 9/411:05LHR - ORD

Nonstop8h 45mFinnair

Deal found 20/2£489

Sun 6/421:20ORD - LHR

Nonstop8h 25mAir Canada

Sun 13/408:30LHR - ORD

Nonstop9h 05mAir Canada

Deal found 20/2£494

Tue 22/418:05ORD - LHR

Nonstop8h 15mUnited Airlines

Sun 27/408:30LHR - ORD

Nonstop9h 05mUnited Airlines

Deal found 20/2£499

Wed 23/421:15ORD - LHR

Nonstop7h 45mBritish Airways

Wed 30/411:05LHR - ORD

Nonstop8h 45mBritish Airways

Deal found 20/2£515

Sun 9/319:30ORD - LHR

Nonstop7h 45mMultiple Airlines

Tue 18/311:00LHR - ORD

Nonstop8h 55mMultiple Airlines

Deal found 20/2£525

Sun 9/319:30ORD - LHR

Nonstop7h 45mAmerican Airlines

Tue 18/315:45LHR - ORD

Nonstop9h 00mAmerican Airlines

Deal found 19/2£536

Mon 7/416:05ORD - LHR

Nonstop8h 15mAustrian Airlines

Mon 14/414:10LHR - ORD

Nonstop9h 05mAustrian Airlines

Deal found 20/2£673

Tue 18/322:10ORD - LHR

Nonstop8h 05mBrussels Airlines

Tue 8/411:05LHR - ORD

Nonstop9h 05mBrussels Airlines

Deal found 20/2£674

Last-minute flights from Illinois to London
Discover last-minute flight deals from Illinois to London. Data last updated 21 February 2025 and is based on user searches.

Tue 25/218:30ORD - LHR

1 stop10h 20mIcelandair

Tue 4/312:15LHR - ORD

1 stop11h 05mIcelandair

Deal found 21/2£464

Tue 25/218:30ORD - LGW

1 stop10h 25mIcelandair

Thu 6/311:55LGW - ORD

1 stop11h 25mIcelandair

Deal found 20/2£483

Wed 26/221:00ORD - LHR

1 stop10h 25mAer Lingus

Wed 5/308:50LHR - ORD

1 stop11h 10mAer Lingus

Deal found 20/2£495

Wed 26/218:26ORD - LHR

Nonstop7h 49mBritish Airways

Tue 25/315:45LHR - ORD

Nonstop9h 00mBritish Airways

Deal found 19/2£502

Wed 26/211:35ORD - LHR

2 stops18h 15mAir Canada

Tue 25/306:50LHR - ORD

2 stops18h 05mAir Canada

Deal found 19/2£507

Wed 26/221:10ORD - LHR

Nonstop8h 05mUnited Airlines

Tue 25/308:55LHR - ORD

1 stop13h 20mUnited Airlines

Deal found 20/2£517

Thu 27/220:30ORD - LGW

1 stop19h 00mTurkish Airlines

Wed 5/306:00LGW - ORD

1 stop34h 10mTurkish Airlines

Deal found 20/2£497

Thu 27/211:44ORD - LHR

1 stop15h 46mJetBlue

Mon 3/308:25LHR - ORD

1 stop14h 35mJetBlue

Deal found 21/2£504

Fri 28/219:40ORD - LHR

1 stop14h 20mScandinavian Airlines

Sun 2/315:35LHR - ORD

2 stops32h 15mScandinavian Airlines

Deal found 20/2£474

Sun 2/320:25ORD - LHR

1 stop19h 10mTAP AIR PORTUGAL

Tue 11/318:30LHR - ORD

1 stop27h 00mTAP AIR PORTUGAL

Deal found 21/2£480

Sun 2/320:25ORD - LGW

2 stops18h 15mTAP AIR PORTUGAL

Tue 11/316:35LGW - ORD

1 stop28h 55mTAP AIR PORTUGAL

Deal found 21/2£486

Sun 2/316:00ORD - LHR

1 stop13h 50mMultiple Airlines

Tue 11/308:55LHR - ORD

1 stop13h 20mMultiple Airlines

Deal found 20/2£497

One-way flights from Illinois to London
Search for one-way flight options from Illinois to London. Find affordable one-way fares based on user searches. Data last updated 21 February 2025.

Wed 23/405:55ORD - LHR

2 stops32h 25mMultiple Airlines

Deal found 21/2£211

Wed 12/308:50ORD - LGW

2 stops18h 15mMultiple Airlines

Deal found 19/2£211

Sun 2/311:44ORD - LHR

1 stop15h 46mJetBlue

Deal found 20/2£213

Sun 27/422:15ORD - LHR

1 stop16h 05mIcelandair

Deal found 21/2£219

Mon 7/413:23MDW - LGW

1 stop14h 37mMultiple Airlines

Deal found 20/2£219

Tue 13/506:00ORD - LTN

3 stops25h 00mMultiple Airlines

Deal found 21/2£222

Wed 30/419:30ORD - LGW

1 stop10h 15mIcelandair

Deal found 21/2£224

Tue 13/506:00ORD - STN

3 stops22h 40mMultiple Airlines

Deal found 21/2£229

Sat 1/307:00MDW - LHR

2 stops47h 50mMultiple Airlines

Deal found 19/2£250

Fri 21/317:24STL - LGW

1 stop35h 36mMultiple Airlines

Deal found 19/2£275

Sun 20/416:45ORD - LHR

1 stop37h 20mWestJet

Deal found 20/2£278

Wed 12/320:15ORD - LGW

1 stop13h 50mTAP AIR PORTUGAL

Deal found 19/2£278

Find flights from Illinois to London within your budget

Fly from

Fly to

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 1/4

16:55-06:50

Nonstop7h 55m

London Heathrow

Tue 29/4

10:20-17:50

1 stop13h 30m

£463

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Wed 2/4

19:30-11:45

1 stop10h 15m

London Gatwick

Sun 20/4

15:40-21:15

1 stop11h 35m

£463

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Sun 6/4

19:15-21:15

2 stops20h 00m

London Stansted

Sun 13/4

10:35-16:10

2 stops35h 35m

£463

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Thu 3/4

21:01-07:00

2 stops27h 59m

London Gatwick

Thu 24/4

14:00-23:39

1 stop15h 39m

£464

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 9/3

20:55-17:00

2 stops15h 05m

London Heathrow

Sun 16/3

21:05-18:50

2 stops26h 45m

£465

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 22/4

17:45-07:20

Nonstop7h 35m

London Heathrow

Wed 30/4

10:00-17:39

1 stop13h 39m

£466

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 24/4

19:30-11:55

1 stop10h 25m

London Heathrow

Tue 29/4

13:05-18:20

1 stop11h 15m

£467

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 1/4

20:50-13:25

1 stop10h 35m

London Heathrow

Tue 29/4

12:00-19:00

1 stop13h 00m

£467

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Sun 9/3

21:25-20:40

2 stops18h 15m

London Gatwick

Tue 18/3

16:35-16:30

1 stop28h 55m

£469

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Tue 1/4

19:30-22:55

2 stops21h 25m

London Luton

Wed 23/4

06:05-08:04

3 stops31h 59m

£471

Flights are sorted by cheapest return flights first.

Deals found on 21/2

Showing 1-10 of 60 results

...

Best time to book a flight from Illinois to London

Have a flexible travel schedule? Discover the best time to fly to London from Illinois with our price prediction graph.

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Illinois to London

Get recent, data-driven insights about flights from Illinois to London including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Illinois to London?

Currently, January is the cheapest month in which you can book a flight from Illinois to London (average of £112). Flying from Illinois to London in August is currently the most expensive (average of £163). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IL to LON?

When flying from Illinois to London, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Illinois to London

The most flights from USIL to LON are scheduled on a Wednesday (38 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (33 on average).

Rainfall in London by month

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

Temperature in London by month

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing London

See what other customers who have flown with Delta, Porter Airlines and KLM from Illinois to London have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

8,213 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very Good

8,213 reviews

Delta

8.0

Very Good

8,213 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Porter Airlines

7.9

Good

276 reviews

Delta

8.0

Very Good

8,213 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,331 reviews

Delta

8.0

Very Good

8,213 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air Transat

7.8

Good

380 reviews

Delta

8.0

Very Good

8,213 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair

7.6

Good

1,273 reviews

Delta

8.0

Very Good

8,213 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What are the cheapest airlines to fly from Illinois to London one-way?
£213 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on Icelandair and WestJet, with prices starting from £219 and £278, respectively.
What are the most popular routes from Illinois to London?
When deciding which route to take from Illinois to London consider Chicago O'Hare Intl - London Heathrow, Chicago O'Hare Intl - London Gatwick or Chicago O'Hare Intl - London City as they are the most popular.
What are the most reliable airlines from Illinois to London?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Illinois to London on time: Aer Lingus (80%), Air Canada (74%), Austrian Airlines (74%).
What are the cheapest flights from Illinois to London?
Looking for the cheapest flight from Illinois to London? While on average our users pay £2,784, our data indicates the cheapest price to be £305. The most popular route (Chicago O'Hare Intl - London Heathrow), is priced around £383.
Can I find deals for flights from Illinois to London that include hotel bookings?
Yes. In addition to deals on Illinois to London flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Illinois to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to London.
Can I find deals for business class flights from Illinois to London?
Yes. Cheapflights offers flight deals from Illinois to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Illinois to London?
Currently, January is the cheapest month in which you can book a flight from Illinois to London (average of £112). Flying from Illinois to London in August is currently the most expensive (average of £163). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Deal

Hounslow

Milton Keynes

Croydon

Gatwick

Slough

Luton

Ilford

Hayes

Eastbourne

Wembley

Southend-on-Sea

Ipswich

Winchester

Maidstone

Crawley

Southall

Watford

Dartford

Stansted

Browse thousands of different options on Cheapflights for your next trip

Top 6 airlines flying from Illinois to London

Airline	Cheapest	Average	Flexibility	On-time
Lufthansa	Cheapest£322	Average£858	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Finnair	Cheapest£378	Average£734	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
American Airlines	Cheapest£406	Average£832	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Iberia	Cheapest£475	Average£684	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
British Airways	Cheapest£506	Average£693	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
United Airlines	Cheapest£527	Average£726	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

Fly with Cheapflights

How does Cheapflights help users find flights from Illinois to London?

Cheapflights helps you search for flights from Illinois to London via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Illinois to London?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Illinois to London for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Illinois to London with no change fees?

Certainly. Search results for flights to London from Illinois shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Illinois to London become cheaper?

Yes, Cheapflights offers price alerts on Illinois to London flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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Cheap flights from Illinois to London from £211

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 23/4. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Illinois to London

Keep the following information in mind while searching for Illinois to London flight deals. Data was last updated 21 February 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Illinois to London

Cheapest flights from Illinois to LondonExplore the most affordable flight options available from Illinois to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 February 2025.

Explore the most affordable flight options available from Illinois to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 February 2025.

Find flights from Illinois to London within your budget

Best time to book a flight from Illinois to London

Have a flexible travel schedule? Discover the best time to fly to London from Illinois with our price prediction graph.

Travel insights for flights from Illinois to London

Get recent, data-driven insights about flights from Illinois to London including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Illinois to London?

What is the cheapest time of day to fly from IL to LON?

Find hourly flight availability from Illinois to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 February 2025.

Weekly flight availability from Illinois to London

Explore weekly flight availability from Illinois to London. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 21 February 2025.

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

Reviews of airlines servicing London

See what other customers who have flown with Delta, Porter Airlines and KLM from Illinois to London have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Illinois to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines to fly from Illinois to London one-way?

What are the most popular routes from Illinois to London?

What are the most reliable airlines from Illinois to London?

What are the cheapest flights from Illinois to London?

Can I find deals for flights from Illinois to London that include hotel bookings?

How can I find direct flights from Illinois to London?

Can I find deals for business class flights from Illinois to London?

What is the cheapest month to book a flight from Illinois to London?

Travelling to a place near Illinois?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to London

See prices for flight routes from nearby airports that may be better suited for you.

Top 6 airlines flying from Illinois to London

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Illinois to London?

Why should you use Cheapflights to find cheap flight tickets from Illinois to London?

Can Cheapflights find flights from Illinois to London with no change fees?

Can Cheapflights notify me if prices for flights from Illinois to London become cheaper?

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Cheapest flights from Illinois to London
Explore the most affordable flight options available from Illinois to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 February 2025.