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$247+ 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 1/26. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LON
Jan 22 — Jan 291
Wed 1/22
Wed 1/29
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 January 17, 2025.

Round-trip from

$596
(Mytrip)

One-way from

$247
(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 January 17, 2025.

This Mytrip deal was found by Cheapflights users on 1/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/27:40 pmORD - LTN
1 stop15h 05mMultiple Airlines
Sun 3/99:00 amLTN - ORD
1 stop11h 00mMultiple Airlines
Deal found 1/16$596
This Mytrip deal was found by Cheapflights users on 1/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/27:40 pmORD - LGW
1 stop15h 30mMultiple Airlines
Sun 3/98:25 amLGW - ORD
1 stop11h 35mMultiple Airlines
Deal found 1/16$596
This Mytrip deal was found by Cheapflights users on 1/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/27:40 pmORD - STN
2 stops21h 15mMultiple Airlines
Sun 3/96:10 amSTN - ORD
2 stops17h 40mMultiple Airlines
Deal found 1/16$596
This Booking.com deal was found by Cheapflights users on 1/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/177:40 pmORD - LHR
2 stops17h 10mScandinavian Airlines
Mon 2/247:05 amLHR - ORD
2 stops16h 45mScandinavian Airlines
Deal found 1/16$597
This Mytrip deal was found by Cheapflights users on 1/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/36:30 pmORD - LGW
1 stop10h 25mIcelandair
Mon 2/1011:55 amLGW - ORD
1 stop11h 25mIcelandair
Deal found 1/16$597
This Iberia deal was found by Cheapflights users on 1/16. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/175:00 pmORD - LHR
Nonstop7h 50mIberia
Tue 2/257:00 amLHR - ORD
1 stop13h 30mIberia
Deal found 1/16$598
This Gotogate deal was found by Cheapflights users on 1/16. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/99:25 pmORD - LGW
2 stops18h 15mTAP AIR PORTUGAL
Thu 3/133:55 pmLGW - ORD
1 stop29h 35mTAP AIR PORTUGAL
Deal found 1/16$598
This oojo deal was found by Cheapflights users on 1/15. 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 4/1810:15 pmORD - LHR
1 stop16h 05mIcelandair
Sat 4/269:25 pmLHR - ORD
1 stop29h 50mIcelandair
Deal found 1/15$607
This oojo deal was found by Cheapflights users on 1/16. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/2911:55 amORD - LGW
1 stop15h 30mTurkish Airlines
Wed 2/54:55 pmLGW - ORD
1 stop23h 15mTurkish Airlines
Deal found 1/16$611
This FlightHub deal was found by Cheapflights users on 1/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/197:15 pmORD - LHR
1 stop16h 15mTAP AIR PORTUGAL
Fri 2/216:00 amLHR - ORD
1 stop15h 30mTAP AIR PORTUGAL
Deal found 1/16$613
This Booking.com deal was found by Cheapflights users on 1/15. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/265:00 pmORD - LHR
Nonstop7h 50mFinnair
Tue 2/411:00 amLHR - ORD
Nonstop8h 55mFinnair
Deal found 1/15$619
This Mytrip deal was found by Cheapflights users on 1/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/45:15 amORD - LHR
2 stops23h 35mMultiple Airlines
Tue 3/1812:15 pmLHR - ORD
2 stops24h 29mMultiple Airlines
Deal found 1/15$624

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 January 17, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Sun 3/2

7:40 pm-4:45 pm

1 stop15h 05m

London Luton

Sun 3/9

9:00 am-3:00 pm

1 stop11h 00m

$596

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Sun 3/2

7:40 pm-5:10 pm

1 stop15h 30m

London Gatwick

Sun 3/9

8:25 am-3:00 pm

1 stop11h 35m

$596

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Sun 3/2

7:40 pm-10:55 pm

2 stops21h 15m

London Stansted

Sun 3/9

6:10 am-5:50 pm

2 stops17h 40m

$596

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 2/17

7:40 pm-6:50 pm

2 stops17h 10m

London Heathrow

Mon 2/24

7:05 am-5:50 pm

2 stops16h 45m

$597

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Mon 2/3

6:30 pm-10:55 am

1 stop10h 25m

London Gatwick

Mon 2/10

11:55 am-5:20 pm

1 stop11h 25m

$597

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 2/17

6:26 pm-8:15 am

Nonstop7h 49m

London Heathrow

Wed 3/5

6:15 am-2:30 pm

1 stop14h 15m

$598

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Sun 3/9

9:25 pm-8:40 pm

2 stops18h 15m

London Gatwick

Thu 3/13

3:55 pm-4:30 pm

1 stop29h 35m

$598

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 4/18

10:15 pm-8:20 pm

1 stop16h 05m

London Heathrow

Sat 4/26

9:25 pm-9:15 pm

1 stop29h 50m

$607

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Wed 1/29

11:55 am-9:25 am

1 stop15h 30m

London Gatwick

Wed 2/5

4:55 pm-10:10 am

1 stop23h 15m

$611

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 2/19

7:15 pm-5:30 pm

1 stop16h 15m

London Heathrow

Fri 2/21

6:00 am-3:30 pm

1 stop15h 30m

$613

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/16

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 $1,137). 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 January 17, 2025.

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 January 17, 2025.

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 (35 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 January 17, 2025.
To help decide which airline to fly from Illinois to London, see what other customers have to say about Scandinavian Airlines, Air France and JetBlue. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,511 reviews

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.9

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
8,511 reviews
Delta
8.0
Very good
8,511 reviews

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.9

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
1,339 reviews
Delta
8.0
Very good
8,511 reviews

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.9

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
1,112 reviews
Delta
8.0
Very good
8,511 reviews

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 10

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

Finnair
7.6
Good
1,285 reviews
Delta
8.0
Very good
8,511 reviews

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.9

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
786 reviews
Delta
8.0
Very good
8,511 reviews

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.9

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 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 Icelandair. According to our data, you can fly for as low as $252. Users have also found prices from $270 and $293 on JetBlue and WestJet, 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 Aer Lingus (70%), Iberia (68%) or American Airlines (66%) 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 $1,616 for a flight from Illinois to London. The cheapest flight overall is $395 while the most popular route, (Chicago O'Hare Intl - London Heathrow) is currently priced at $410.

  • 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 $1,137). 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

Traveling to a place near Illinois?

Book flights to Illinois if you plan to visit one of these locations
Hayes
Hounslow
Thornton Heath
Harrow
Luton
Wembley
Canterbury
Gatwick
Horley
Milton Keynes
Dover
Watford
Orpington
Croydon
Borehamwood
Bromley
Folkestone
Ilford
Aylesbury
Chelmsford

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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 January 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$381Average$552FlexibilityNo cancel feeOn-time77%
DeltaCheapest$451Average$882FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$471Average$641FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$507Average$849FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$516Average$679FlexibilityNo cancel feeOn-time62%
Air CanadaCheapest$554Average$742FlexibilityNo cancel feeOn-time67%
FinnairCheapest$568Average$787FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$570Average$683FlexibilityNo cancel feeOn-time72%
LufthansaCheapest$577Average$922FlexibilityNo cancel feeOn-time76%
SWISSCheapest$581Average$836FlexibilityNo cancel feeOn-time79%
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