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$217+ Cheap flights from Illinois to London (LON)

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 — LON
Dec 24 — Dec 311
Tue 12/24
Tue 12/31
1 adult, Economy
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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 December 19, 2024.

Round-trip from

$596
(Booking.com)

One-way from

$217
(Kiwi.com)
From Illinois to London (LON)
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One-way flight from Illinois to London (LON)
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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 December 19, 2024.

This United deal was found by Cheapflights users on 12/18. 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.
Mon 12/309:40 pmORD - LHR
1 stop30h 00mUnited Airlines
Fri 1/102:30 pmLHR - ORD
1 stop28h 41mUnited Airlines
Deal found 12/18$658
This oojo deal was found by Cheapflights users on 12/18. 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
Fri 1/103:35 pmLHR - ORD
2 stops30h 15mScandinavian Airlines
Deal found 12/18$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 Delta deal was found by Cheapflights users on 12/18. 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 12/3110:08 amMDW - LHR
1 stop15h 47mDelta
Mon 1/138:40 amLHR - MDW
2 stops15h 34mDelta
Deal found 12/18$711
This oojo deal was found by Cheapflights users on 12/18. 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.
Sat 12/288:35 pmORD - LHR
1 stop33h 30mBritish Airways
Fri 1/106:00 pmLHR - ORD
1 stop22h 47mBritish Airways
Deal found 12/18$712
This Air France deal was found by Cheapflights users on 12/18. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/313:32 pmMDW - LHR
1 stop13h 03mAir France
Mon 1/1312:20 pmLHR - MDW
1 stop11h 54mAir France
Deal found 12/18$724
This American Airlines deal was found by Cheapflights users on 12/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/296:25 pmORD - LHR
Nonstop7h 50mAmerican Airlines
Fri 1/108:40 amLHR - ORD
1 stop14h 12mAmerican Airlines
Deal found 12/18$840
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 Gotogate deal was found by Cheapflights users on 12/18. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/248:25 pmORD - LHR
1 stop28h 05mMultiple Airlines
Wed 1/296:00 amLHR - ORD
1 stop14h 05mMultiple Airlines
Deal found 12/18$883
This Finnair deal was found by Cheapflights users on 12/18. 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.
Wed 12/256:25 pmORD - LHR
Nonstop7h 50mFinnair
Thu 5/19:30 amLHR - ORD
1 stop14h 20mFinnair
Deal found 12/18$888
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 - LGW
1 stop13h 25mTAP AIR PORTUGAL
Tue 4/294:25 pmLGW - ORD
1 stop29h 45mTAP AIR PORTUGAL
Deal found 12/17$895
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 12/177:05 pmORD - LGW
1 stop16h 45mSWISS
Tue 12/246:45 pmLGW - ORD
1 stop27h 30mSWISS
Deal found 12/16$907

Find flights from Illinois to London within your budget

Customize 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 2,558,603 searches. Data last updated December 19, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 1/12

6:30 pm-10:50 am

1 stop10h 20m

London Heathrow

Tue 6/10

1:05 pm-6:15 pm

1 stop11h 10m

$596

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 1/17

8:20 pm-6:55 pm

1 stop16h 35m

London Heathrow

Sun 1/19

6:00 am-3:30 pm

1 stop15h 30m

$597

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 2/20

7:40 pm-4:00 pm

1 stop14h 20m

London Heathrow

Mon 2/24

10:20 am-5:50 pm

1 stop13h 30m

$598

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Wed 1/15

7:15 pm-3:05 pm

1 stop13h 50m

London Gatwick

Sat 1/18

4:35 pm-3:30 pm

1 stop28h 55m

$599

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Wed 2/19

6:30 pm-10:55 am

1 stop10h 25m

London Gatwick

Wed 2/26

11:55 am-5:20 pm

1 stop11h 25m

$600

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Tue 2/18

6:30 pm-10:55 am

1 stop10h 25m

London Gatwick

Mon 2/24

12:00 pm-4:31 pm

2 stops34h 31m

$602

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Tue 3/11

5:45 pm-11:45 am

1 stop13h 00m

London Stansted

Thu 3/20

6:00 am-3:30 pm

1 stop14h 30m

$602

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Wed 2/5

8:30 pm-9:30 pm

1 stop19h 00m

London Gatwick

Mon 2/10

6:00 am-6:35 pm

1 stop18h 35m

$612

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 1/19

8:25 pm-7:50 pm

2 stops17h 25m

London Heathrow

Tue 1/21

9:50 am-3:30 pm

2 stops35h 40m

$613

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Sun 1/12

6:30 pm-2:40 pm

2 stops14h 10m

London Luton

Tue 1/21

9:00 am-5:20 pm

2 stops14h 20m

$618

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 London

Have a flexible travel schedule? Discover the best time to fly to London 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 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, November is the cheapest month in which you can book a flight from Illinois to London (average of $661). Flying from Illinois to London in June is currently the most expensive (average of $1,088). 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 December 19, 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 as you normally would.

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 December 19, 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 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 when rainfall is around 1.6 in.

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 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 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 December 19, 2024.
To help decide which airline to fly from Illinois to London, see what other customers have to say about Iberia, British Airways and Delta. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,600 reviews

Boarding

8.2

Comfort

8.0

Crew

8.6

Entertainment

7.9

Food

7.3

Overall

8.0

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
8,600 reviews
Delta
8.0
Very good
8,600 reviews

Boarding

8.2

Comfort

8.0

Crew

8.6

Entertainment

7.9

Food

7.3

Overall

8.0

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
8,600 reviews

Boarding

8.2

Comfort

8.0

Crew

8.6

Entertainment

7.9

Food

7.3

Overall

8.0

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
8,600 reviews

Boarding

8.2

Comfort

8.0

Crew

8.6

Entertainment

7.9

Food

7.3

Overall

8.0

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
8,600 reviews

Boarding

8.2

Comfort

8.0

Crew

8.6

Entertainment

7.9

Food

7.3

Overall

8.0

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
8,600 reviews

Boarding

8.2

Comfort

8.0

Crew

8.6

Entertainment

7.9

Food

7.3

Overall

8.0

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?

    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 $223 and $252 on Icelandair and JetBlue, respectively.

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

    While some choose either Chicago O'Hare Intl - London Gatwick or Chicago O'Hare Intl - London City, Chicago O'Hare Intl - London Heathrow is the most popular route from Illinois to London.

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

    No one likes to see their flight delayed. When booking a flight from Illinois to London consider choosing Lufthansa (82%), Air Canada (77%) or Austrian Airlines (77%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Illinois to London?

    On average you can expect to pay $1,673 for a flight from Illinois to London. The cheapest flight overall is $375 while the most popular route, (Chicago O'Hare Intl - London Heathrow) is currently priced at $476.

  • 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 vacation 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, November is the cheapest month in which you can book a flight from Illinois to London (average of $661). Flying from Illinois to London in June is currently the most expensive (average of $1,088). 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 London

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Illinois to London

Discover the top 10 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 2,558,603 searches. Data last updated December 19, 2024.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$381Average$552FlexibilityNo cancel feeOn-time77%
DeltaCheapest$451Average$882FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$471Average$655FlexibilityNo 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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