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Cheap flights from Illinois to London from £171

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 17/3. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LON
24 Dec — 31 Dec1
1 adult

Cheap flight deals from Illinois to London

Discover tips and strategies to find the most affordable flight options for your journey from Illinois (USIL) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 19 December 2024.

Round-trip from

£469

One-way from

£171
12/1-21/1
  • 12/1-21/1
  • 4 total stops
  • 30h 35m total
  • Illinois to London
Search Deals
WestJet
  • WestJet
  • 17/3
  • 1 total stop
  • 15h 05m total
  • Illinois to London
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 19 December 2024.

Mon 30/1221:40ORD - LHR
1 stop30h 00mUnited Airlines
Fri 10/114:30LHR - ORD
1 stop28h 41mUnited Airlines
Deal found 18/12£519
Mon 30/1219:10ORD - LHR
1 stop14h 50mScandinavian Airlines
Fri 10/115:35LHR - ORD
2 stops30h 15mScandinavian Airlines
Deal found 18/12£535
Sun 29/1210:30ORD - LHR
1 stop14h 20mVirgin Atlantic
Sun 19/106:30LHR - ORD
1 stop14h 00mVirgin Atlantic
Deal found 17/12£552
Sat 28/1220:35ORD - LHR
1 stop33h 30mBritish Airways
Fri 10/118:00LHR - ORD
1 stop22h 47mBritish Airways
Deal found 18/12£562
Sun 29/1218:25ORD - LHR
Nonstop7h 50mAmerican Airlines
Fri 10/108:40LHR - ORD
1 stop14h 12mAmerican Airlines
Deal found 18/12£663
Wed 18/1208:51ORD - LHR
1 stop15h 04mJetBlue
Thu 16/107:25LHR - ORD
1 stop14h 19mJetBlue
Deal found 17/12£682
Tue 24/1220:25ORD - LHR
1 stop28h 05mMultiple Airlines
Wed 29/106:00LHR - ORD
1 stop14h 05mMultiple Airlines
Deal found 18/12£696
Wed 25/1218:25ORD - LHR
Nonstop7h 50mFinnair
Thu 1/509:30LHR - ORD
1 stop14h 20mFinnair
Deal found 18/12£700
Fri 27/1220:20ORD - LGW
1 stop13h 25mTAP AIR PORTUGAL
Tue 29/416:25LGW - ORD
1 stop29h 45mTAP AIR PORTUGAL
Deal found 17/12£706
Tue 17/1219:05ORD - LGW
1 stop16h 45mSWISS
Tue 24/1218:45LGW - ORD
1 stop27h 30mSWISS
Deal found 16/12£715
Tue 24/1216:55ORD - LHR
1 stop10h 25mIberia
Tue 28/108:10LHR - ORD
2 stops17h 54mIberia
Deal found 17/12£717
Wed 25/1212:30ORD - LHR
1 stop12h 20mDelta
Tue 29/409:00LHR - ORD
1 stop12h 00mDelta
Deal found 18/12£719

Find flights from Illinois to London within your budget

Customise your flight search to find flights from Illinois to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 19 December 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Sun 12/1

18:30-16:45

2 stops16h 15m

London Luton

Tue 21/1

09:00-17:20

2 stops14h 20m

£469

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Tue 21/1

07:00-06:00

1 stop17h 00m

London Gatwick

Wed 12/2

13:00-21:33

1 stop14h 33m

£469

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 12/1

18:30-10:50

1 stop10h 20m

London Heathrow

Tue 10/6

13:05-18:15

1 stop11h 10m

£470

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 17/1

20:20-18:55

1 stop16h 35m

London Heathrow

Sun 19/1

06:00-15:30

1 stop15h 30m

£471

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Fri 31/1

20:20-15:45

1 stop13h 25m

London Gatwick

Fri 7/2

21:30-15:30

2 stops48h 00m

£471

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 20/2

19:40-16:00

1 stop14h 20m

London Heathrow

Mon 24/2

10:20-17:50

1 stop13h 30m

£472

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Wed 19/2

18:30-10:55

1 stop10h 25m

London Gatwick

Wed 26/2

11:55-17:20

1 stop11h 25m

£473

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Tue 11/3

17:45-11:45

1 stop13h 00m

London Stansted

Thu 20/3

06:00-15:30

1 stop14h 30m

£475

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Tue 18/3

21:30-21:30

1 stop19h 00m

London Gatwick

Mon 31/3

14:00-09:50

1 stop25h 50m

£482

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 19/1

20:25-19:50

2 stops17h 25m

London Heathrow

Tue 21/1

09:50-15:30

2 stops35h 40m

£483

Flights are sorted by cheapest return flights first.

Deals found on 18/12

Showing 1-10 of 60 results
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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 July is currently the most expensive (average of £160). 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?

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 19 December 2024.

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

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 19 December 2024.

The most flights from USIL to LON are scheduled on a Monday (40 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (32 on average).

Rainfall in London by month

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

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

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated 19 December 2024.
See what other customers who have flown with British Airways, Aer Lingus and Scandinavian Airlines 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
8,604 reviews
Check prices

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 10

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

Delta
8.0
Very Good
8,604 reviews
Delta
8.0
Very Good
8,604 reviews
Check prices

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 10

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

KLM
7.8
Good
1,349 reviews
Delta
8.0
Very Good
8,604 reviews
Check prices

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 10

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

Finnair
7.7
Good
1,285 reviews
Delta
8.0
Very Good
8,604 reviews
Check prices

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 10

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

LOT
7.6
Good
1,129 reviews
Delta
8.0
Very Good
8,604 reviews
Check prices

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 10

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

SWISS
7.6
Good
1,605 reviews
Delta
8.0
Very Good
8,604 reviews
Check prices

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 10

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

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?

    £171 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Icelandair and JetBlue, with prices starting from £172 and £199, 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: Lufthansa (82%), Air Canada (77%), Austrian Airlines (77%).

  • What are the cheapest flights from Illinois to London?

    Looking for the cheapest flight from Illinois to London? While on average our users pay £3,256, our data indicates the cheapest price to be £294. The most popular route (Chicago O'Hare Intl - London Heathrow), is priced around £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.

  • 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 July is currently the most expensive (average of £160). 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

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Alternative routes for Illinois to London

See prices for flight routes from nearby airports that may be better suited for you.
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Top 8 airlines flying from Illinois to London

Discover the top 8 airlines that operate flights from Illinois to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 19 December 2024.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£321Average£854FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Scandinavian AirlinesCheapest£343Average£403FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
American AirlinesCheapest£405Average£792FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
FinnairCheapest£454Average£731FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Aer LingusCheapest£469Average£678FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£492Average£679FlexibilityNo cancel feeOn-time70%
Search British Airways flights
IberiaCheapest£519Average£686FlexibilityNo cancel feeOn-time77%
Search Iberia flights
United AirlinesCheapest£533Average£700FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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?

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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