Find flights
Deals
Airlines
FAQs

Cheap flights from Illinois to London Heathrow Airport from £159

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 21/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LHR
27 Nov — 4 Dec1
1 adult

Find flights from Illinois to Heathrow within your budget

Customise your flight search to find flights from Illinois to Heathrow 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 915,844 searches. Data last updated 22 November 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 4/12

19:15-15:30

1 stop14h 15m

London Heathrow

Fri 13/12

06:00-15:30

1 stop15h 30m

£475

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 24/4

19:15-16:25

2 stops15h 10m

London Heathrow

Mon 28/4

19:30-16:10

1 stop26h 40m

£476

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 8/1

20:14-08:30

3 stops30h 16m

London Heathrow

Tue 14/1

12:05-16:08

3 stops34h 03m

£477

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 12/1

18:35-08:15

Nonstop7h 40m

London Heathrow

Wed 5/2

06:15-14:30

1 stop14h 15m

£477

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 15/5

22:15-20:20

1 stop16h 05m

London Heathrow

Mon 26/5

21:25-21:15

1 stop29h 50m

£480

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 22/4

17:55-07:50

Nonstop7h 55m

London Heathrow

Wed 30/4

10:20-17:25

1 stop13h 05m

£485

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 15/1

17:20-09:20

1 stop10h 00m

London Heathrow

Tue 21/1

14:10-17:00

Nonstop8h 50m

£489

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 2/12

07:20-07:10

1 stop17h 50m

London Heathrow

Wed 11/12

08:55-16:15

1 stop13h 20m

£491

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 3/12

13:31-06:20

1 stop10h 49m

London Heathrow

Fri 13/12

06:30-14:30

1 stop14h 00m

£498

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 4/12

14:05-11:50

1 stop15h 45m

London Heathrow

Tue 10/12

06:50-14:45

2 stops13h 55m

£501

Flights are sorted by cheapest return flights first.

Deals found on 22/11

Showing 1-10 of 60 results
1
2
3
...
6

Cheap flight deals from Illinois to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Illinois (USIL) to Heathrow (LHR). 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 22 November 2024.

Find flight deals from Illinois to Heathrow

Cheapest flights from Illinois to Heathrow
Explore the most affordable flight options available from Illinois to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 November 2024.

Sun 1/1220:25ORD - LHR
1 stop15h 05mTAP AIR PORTUGAL
Fri 13/1206:00LHR - ORD
1 stop15h 30mTAP AIR PORTUGAL
Deal found 21/11£475
Thu 5/1213:13ORD - LHR
3 stops35h 57mMultiple Airlines
Mon 9/1206:00LHR - ORD
2 stops24h 34mMultiple Airlines
Deal found 20/11£477
Mon 25/1111:35ORD - LHR
1 stop13h 35mAir Canada
Wed 4/1211:10LHR - ORD
1 stop14h 22mAir Canada
Deal found 21/11£487
Mon 25/1121:10ORD - LHR
Nonstop8h 05mUnited Airlines
Wed 4/1207:30LHR - ORD
1 stop13h 45mUnited Airlines
Deal found 21/11£489
Sun 8/1221:10ORD - LHR
Nonstop8h 05mLufthansa
Tue 24/1210:25LHR - ORD
Nonstop9h 25mLufthansa
Deal found 22/11£495
Tue 3/1213:31ORD - LHR
1 stop10h 49mDelta
Fri 13/1206:30LHR - ORD
1 stop14h 00mDelta
Deal found 21/11£498
Wed 4/1218:35ORD - LHR
Nonstop7h 40mIberia
Tue 10/1214:10LHR - ORD
Nonstop8h 50mIberia
Deal found 22/11£500
Thu 28/1118:30ORD - LHR
1 stop19h 00mIcelandair
Wed 4/1220:40LHR - ORD
1 stop26h 40mIcelandair
Deal found 21/11£503
Tue 3/1222:05ORD - LHR
Nonstop7h 35mFinnair
Wed 11/1211:55LHR - ORD
Nonstop8h 50mFinnair
Deal found 22/11£504
Tue 26/1112:43MDW - LHR
1 stop11h 37mDelta
Thu 5/1206:30LHR - MDW
2 stops15h 45mDelta
Deal found 22/11£506
Mon 9/1213:45ORD - LHR
1 stop11h 05mKLM
Wed 18/1212:20LHR - ORD
1 stop12h 11mKLM
Deal found 21/11£514
Mon 9/1209:38MDW - LHR
1 stop15h 27mVirgin Atlantic
Wed 18/1209:10LHR - MDW
1 stop15h 22mVirgin Atlantic
Deal found 21/11£514

Best time to book a flight from Illinois to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow 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 Heathrow

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

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

Currently, January is the cheapest month in which you can book a flight from Illinois to London Heathrow Airport (average of £112). Flying from Illinois to London Heathrow Airport 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 LHR?

Find hourly flight availability from Illinois to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 22 November 2024.

When flying from Illinois to London Heathrow Airport, 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 Heathrow Airport

Explore weekly flight availability from Illinois to Heathrow. 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 22 November 2024.

The most flights from USIL to LHR 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 (30 on average).

Rainfall in Heathrow by month

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

In terms of precipitation, rainfall in London Heathrow Airport 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 Heathrow Airport when rainfall is around 40.0 mm.

Temperature in Heathrow by month

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

If weather is an important factor for your trip to London Heathrow Airport, 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 Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated 22 November 2024.
To help decide which airline to fly from Illinois to London, see what other customers have to say about United Airlines, Austrian Airlines and Air France. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
8,747 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.2

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
8,747 reviews
Delta
8.0
Very Good
8,747 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 10

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

KLM
7.8
Good
1,346 reviews
Delta
8.0
Very Good
8,747 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 10

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

Finnair
7.7
Good
1,299 reviews
Delta
8.0
Very Good
8,747 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 10

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

Austrian Airlines
7.6
Good
804 reviews
Delta
8.0
Very Good
8,747 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 10

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

SWISS
7.6
Good
1,637 reviews
Delta
8.0
Very Good
8,747 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.2

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 Heathrow. 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 Heathrow Airport one-way?

    The cheapest airline one-way is Icelandair, with whom users have recently found tickets for as low as £159. However, be on the lookout for offers from WestJet and TAP AIR PORTUGAL, as they are both options that can get you from Illinois to London Heathrow Airport for a low price.

  • What are the most popular routes from Illinois to London Heathrow Airport?

    The most popular route from Illinois to London Heathrow Airport is Chicago O'Hare Intl - London Heathrow. You may also consider Chicago Midway - London Heathrow or Lambert-St Louis - London Heathrow.

  • What are the most reliable airlines from Illinois to London Heathrow Airport?

    No one likes to see their flight delayed. When booking a flight from Illinois to London Heathrow Airport consider choosing Brussels Airlines (75%), Air Canada (74%) or Austrian Airlines (74%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Illinois to London Heathrow Airport?

    On average you can expect to pay £3,233 for a flight from Illinois to London Heathrow Airport. The cheapest flight overall is £295 while the most popular route, (Chicago O'Hare Intl - London Heathrow) is currently priced at £347.

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

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

  • How can I find direct flights from Illinois to Heathrow?

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

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

    Yes. Cheapflights offers flight deals from Illinois to Heathrow 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 Heathrow Airport?

    Currently, January is the cheapest month in which you can book a flight from Illinois to London Heathrow Airport (average of £112). Flying from Illinois to London Heathrow Airport 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

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 Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Heathrow flights
Newark to Heathrow flights
John F Kennedy Intl to Gatwick flights
John F Kennedy Intl to London City flights
Newark to Gatwick flights
LaGuardia to Heathrow flights
Newark to London City flights
Los Angeles to Heathrow flights
Stewart to Stansted flights
Dulles Intl to Heathrow flights
Boston to Heathrow flights
O'Hare Intl to Heathrow flights
San Francisco to Heathrow flights
Baltimore to Heathrow flights
Seattle to Heathrow flights
John F Kennedy Intl to Stansted flights
Dallas/Fort Worth to Heathrow flights
Miami to Heathrow flights
Newark to Stansted flights
Stewart to Luton flights
Newark to Luton flights
Atlanta to Heathrow flights
Boston to Gatwick flights
LaGuardia to Gatwick flights
Los Angeles to Gatwick flights
Boston to London City flights
Dulles Intl to Gatwick flights
Denver to Heathrow flights
Los Angeles to London City flights
Reagan-National to Heathrow flights
Dulles Intl to London City flights
Orlando to Heathrow flights
Boston to Stansted flights
O'Hare Intl to Gatwick flights
Baltimore to Gatwick flights
O'Hare Intl to London City flights
Philadelphia to Heathrow flights
Hobby to Heathrow flights
Seattle to Gatwick flights
San Francisco to Gatwick flights
Seattle to London City flights
Raleigh to Heathrow flights
San Francisco to London City flights
Tampa to Heathrow flights
Stewart to Gatwick flights
Baltimore to Stansted flights
George Bush Intcntl to Heathrow flights
Charlotte to Heathrow flights
Reagan-National to Gatwick flights

Top 8 airlines flying from Illinois to Heathrow

Discover the top 8 airlines that operate flights from Illinois to Heathrow. 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 915,844 searches. Data last updated 22 November 2024.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£322Average£788FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Scandinavian AirlinesCheapest£344Average£405FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
FinnairCheapest£378Average£746FlexibilityNo cancel feeOn-time76%
Search Finnair flights
American AirlinesCheapest£406Average£750FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Aer LingusCheapest£471Average£681FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£494Average£690FlexibilityNo cancel feeOn-time70%
Search British Airways flights
IberiaCheapest£497Average£677FlexibilityNo cancel feeOn-time77%
Search Iberia flights
United AirlinesCheapest£535Average£783FlexibilityNo 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 Heathrow?

When you search for this flight from Illinois to Heathrow, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Heathrow from Illinois.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Illinois to Heathrow, users can toggle the no change fees filter when performing a flight search.

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

Yes, Cheapflights offers price alerts on Illinois to Heathrow 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.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines