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Heathrow

$217+ Cheap flights from Illinois to Heathrow (LHR)

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 3/17. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LHR
Dec 23 — Dec 301
Mon 12/23
Mon 12/30
1 adult, Economy
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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 December 18, 2024.

Round-trip from

$595
(Scandinavian Airlines)

One-way from

$217
(Kiwi.com)
From Illinois to London Heathrow
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One-way flight from Illinois to London Heathrow
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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 December 18, 2024.

This United deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/315:50 pmORD - LHR
Nonstop8h 05mUnited Airlines
Mon 1/139:30 amLHR - ORD
1 stop31h 35mUnited Airlines
Deal found 12/17$658
This oojo deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/307:10 pmORD - LHR
1 stop14h 50mScandinavian Airlines
Thu 1/93:35 pmLHR - ORD
2 stops30h 15mScandinavian Airlines
Deal found 12/17$678
This Virgin Atlantic deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2910:30 amORD - LHR
1 stop14h 20mVirgin Atlantic
Sun 1/196:30 amLHR - ORD
1 stop14h 00mVirgin Atlantic
Deal found 12/17$700
This Finnair deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3110:00 pmORD - LHR
Nonstop7h 40mFinnair
Mon 1/1311:55 amLHR - ORD
Nonstop8h 50mFinnair
Deal found 12/17$707
This Delta deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3110:30 amORD - LHR
2 stops16h 30mDelta
Mon 1/138:40 amLHR - ORD
1 stop11h 50mDelta
Deal found 12/17$720
This Ovago deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/296:25 pmORD - LHR
Nonstop7h 50mBritish Airways
Fri 1/108:40 amLHR - ORD
1 stop17h 10mBritish Airways
Deal found 12/17$722
This Expedia deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/317:05 pmORD - LHR
1 stop11h 55mMultiple Airlines
Fri 1/109:00 amLHR - ORD
2 stops16h 37mMultiple Airlines
Deal found 12/17$740
This JetBlue deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/188:51 amORD - LHR
1 stop15h 04mJetBlue
Thu 1/167:25 amLHR - ORD
1 stop14h 19mJetBlue
Deal found 12/17$865
This oojo deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/278:20 pmORD - LHR
1 stop15h 10mTAP AIR PORTUGAL
Tue 4/297:50 pmLHR - ORD
1 stop26h 20mTAP AIR PORTUGAL
Deal found 12/17$899
This Iberia deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/244:55 pmORD - LHR
1 stop10h 25mIberia
Tue 1/288:10 amLHR - ORD
2 stops17h 54mIberia
Deal found 12/17$909
This Kiwi.com deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/171:19 pmORD - LHR
2 stops37h 01mAustrian Airlines
Tue 12/249:05 amLHR - ORD
1 stop35h 00mAustrian Airlines
Deal found 12/16$912
This SWISS deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/177:05 pmORD - LHR
1 stop15h 15mSWISS
Wed 12/256:00 amLHR - ORD
1 stop16h 15mSWISS
Deal found 12/17$913

Find flights from Illinois to Heathrow within your budget

Customize 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 2,558,603 searches. Data last updated December 18, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 1/18

7:10 pm-4:25 pm

2 stops15h 15m

London Heathrow

Mon 1/20

7:30 pm-10:23 pm

2 stops32h 53m

$595

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 1/12

9:05 am-5:55 am

1 stop14h 50m

London Heathrow

Tue 1/21

8:25 am-5:59 pm

1 stop15h 34m

$600

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 1/19

8:25 pm-9:00 pm

2 stops18h 35m

London Heathrow

Tue 1/21

12:10 pm-3:30 pm

2 stops33h 20m

$601

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 1/8

7:15 pm-3:30 pm

1 stop14h 15m

London Heathrow

Wed 1/15

6:00 am-3:30 pm

1 stop15h 30m

$603

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Sun 1/12

5:07 pm-10:35 am

1 stop11h 28m

London Heathrow

Tue 1/21

12:20 pm-6:14 pm

1 stop11h 54m

$610

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 2/12

9:45 pm-11:30 am

Nonstop7h 45m

London Heathrow

Tue 2/18

6:10 am-2:30 pm

1 stop14h 20m

$622

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 1/12

1:40 pm-6:50 am

1 stop11h 10m

London Heathrow

Tue 1/21

9:00 am-3:05 pm

1 stop12h 05m

$623

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 3/18

7:40 pm-8:15 am

Nonstop7h 35m

London Heathrow

Thu 4/3

7:30 am-5:25 pm

1 stop15h 55m

$631

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 1/16

6:30 pm-10:50 am

1 stop10h 20m

London Heathrow

Tue 1/21

12:15 pm-5:20 pm

1 stop11h 05m

$640

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 3/2

6:26 pm-8:15 am

Nonstop7h 49m

London Heathrow

Wed 3/12

10:15 am-2:05 pm

Nonstop8h 50m

$641

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/18

Showing 1-10 of 60 results
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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 round-trip 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, November is the cheapest month in which you can book a flight from Illinois to London Heathrow Airport (average of $661). Flying from Illinois to London Heathrow Airport in June is currently the most expensive (average of $1,135). 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 December 18, 2024.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to London Heathrow Airport as you normally would.

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 December 18, 2024.

The most flights from USIL to LHR 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 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 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London Heathrow Airport when rainfall is around 1.6 in.

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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

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 December 18, 2024.
To help decide which airline to fly from Illinois to London, see what other customers have to say about JetBlue, British Airways and KLM. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,604 reviews

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.6

Food

7.3

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

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.6

Food

7.3

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

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.6

Food

7.3

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

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.6

Food

7.3

Reviews

1 / 10

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

LOT
7.6
Good
1,133 reviews
Delta
8.0
Very good
8,604 reviews

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.6

Food

7.3

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
787 reviews
Delta
8.0
Very good
8,604 reviews

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.6

Food

7.3

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?

    For one-way options, check prices for WestJet. According to our data, you can fly for as low as $217. Users have also found prices from $224 and $252 on Icelandair and JetBlue, respectively.

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

    The most popular flight routes from Illinois to London Heathrow Airport are Chicago O'Hare Intl - London Heathrow, Chicago Midway - London Heathrow and Lambert-St Louis - London Heathrow.

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

    Consider Lufthansa (82%), Air Canada (77%) or Austrian Airlines (77%) when booking your flight. These represent the most reliable airlines when flying from Illinois to London Heathrow Airport.

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

    While on average a flight from Illinois to London Heathrow Airport is generally $1,673, our data shows the cheapest flight currently is $375. When looking at the most popular route, (Chicago O'Hare Intl - London Heathrow), you can expect to pay $478 for that flight.

  • 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 vacation 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, November is the cheapest month in which you can book a flight from Illinois to London Heathrow Airport (average of $661). Flying from Illinois to London Heathrow Airport in June is currently the most expensive (average of $1,135). 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.

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Alternative routes for Illinois to Heathrow

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

Top 10 airlines flying from Illinois to Heathrow

Discover the top 10 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 2,558,603 searches. Data last updated December 18, 2024.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$381Average$552FlexibilityNo cancel feeOn-time77%
DeltaCheapest$451Average$882FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$471Average$612FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$506Average$826FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$516Average$679FlexibilityNo cancel feeOn-time62%
Air CanadaCheapest$554Average$764FlexibilityNo cancel feeOn-time67%
FinnairCheapest$567Average$790FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$570Average$683FlexibilityNo cancel feeOn-time72%
SWISSCheapest$581Average$896FlexibilityNo cancel feeOn-time79%
IberiaCheapest$584Average$740FlexibilityNo cancel feeOn-time77%
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