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$283+ 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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LON
Jul 6 — Jul 131
Sun 7/6
Sun 7/13
1 adult, Economy
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Cheap flight deals from Illinois to London

Keep the following information in mind while searching for Illinois to London flight deals. Data was last updated July 1, 2025.

Round-trip from

$658
(Iberia)

One-way from

$283
(Mytrip)

Popular in

June

Cheapest in

February

Average price

$1,034

Good round-trip deal

$670 or less

Good one-way deal

$487 or less
From Illinois to London (LON)
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One-way flight from Illinois to London (LON)
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Highest demand for flights based on searches. 21% potential increase in price ($207 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Illinois to London (LON).
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Price to beat on a 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 July 1, 2025.

This Mytrip deal was found by Cheapflights users on 7/1. 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.
Fri 8/158:47 pmORD - LGW
2 stops32h 08mMultiple Airlines
Fri 8/2210:55 amLGW - ORD
1 stop24h 45mMultiple Airlines
Deal found 7/1$656
This Iberia deal was found by Cheapflights users on 6/30. 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.
Sun 7/204:30 pmORD - LHR
1 stop16h 25mIberia
Tue 8/196:15 pmLHR - ORD
2 stops31h 55mIberia
Deal found 6/30$658
This Virgin Atlantic deal was found by Cheapflights users on 7/1. 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.
Tue 11/41:00 pmMDW - LHR
2 stops11h 55mVirgin Atlantic
Tue 11/1811:30 amLHR - MDW
2 stops16h 14mVirgin Atlantic
Deal found 7/1$658
This Ovago deal was found by Cheapflights users on 6/30. 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.
Fri 9/268:40 pmORD - LHR
Nonstop7h 50mBritish Airways
Sun 9/289:15 amLHR - ORD
1 stop15h 35mBritish Airways
Deal found 6/30$659
This Scandinavian Airlines deal was found by Cheapflights users on 7/1. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/177:15 pmORD - LHR
2 stops15h 10mScandinavian Airlines
Wed 8/276:40 amLHR - ORD
2 stops21h 14mScandinavian Airlines
Deal found 7/1$660
This Kiwi.com deal was found by Cheapflights users on 7/1. 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.
Thu 10/97:15 pmORD - STN
1 stop18h 15mMultiple Airlines
Tue 10/148:25 amSTN - ORD
1 stop13h 45mMultiple Airlines
Deal found 7/1$660
This United Airlines deal was found by Cheapflights users on 6/30. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/156:15 pmORD - LHR
1 stop32h 20mUnited Airlines
Thu 8/217:25 amLHR - ORD
1 stop12h 35mUnited Airlines
Deal found 6/30$661
This Mytrip deal was found by Cheapflights users on 7/1. 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 9/217:11 amORD - LTN
2 stops20h 04mMultiple Airlines
Tue 10/77:05 pmLTN - ORD
2 stops25h 50mMultiple Airlines
Deal found 7/1$661
This Flightnetwork deal was found by Cheapflights users on 6/28. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/112:20 pmORD - LCY
1 stop12h 30mSWISS
Wed 8/207:20 pmLCY - ORD
1 stop22h 50mSWISS
Deal found 6/28$661
This Mytrip deal was found by Cheapflights users on 6/30. 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 9/227:25 pmORD - LCY
2 stops17h 20mMultiple Airlines
Fri 9/269:25 amLCY - ORD
2 stops17h 50mMultiple Airlines
Deal found 6/30$662
This oojo deal was found by Cheapflights users on 6/29. 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 8/116:10 pmORD - LGW
1 stop15h 25mTAP AIR PORTUGAL
Wed 8/2012:05 pmLGW - ORD
2 stops30h 30mTAP AIR PORTUGAL
Deal found 6/29$662
This Kiwi.com deal was found by Cheapflights users on 7/1. 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.
Mon 8/188:35 amMDW - LGW
1 stop19h 25mMultiple Airlines
Thu 8/212:00 pmLGW - MDW
1 stop24h 22mMultiple Airlines
Deal found 7/1$663

Cheapflights Fare Finder

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 July 1, 2025.
Use the filters below to find and compare flights from Illinois to London that are best for you.

Fly from

Illinois

Fly to

London

Route

Depart

Return

Price

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Fri 8/15

8:47 pm-10:55 am

2 stops32h 08m

London Gatwick

Fri 8/22

10:55 am-5:40 am

1 stop24h 45m

$656

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 7/20

4:30 pm-2:55 pm

1 stop16h 25m

London Heathrow

Tue 8/19

6:15 pm-8:10 pm

2 stops31h 55m

$658

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Tue 11/4

1:00 pm-6:55 am

2 stops11h 55m

London Heathrow

Tue 11/18

11:30 am-9:44 pm

2 stops16h 14m

$658

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 9/26

8:40 pm-10:30 am

Nonstop7h 50m

London Heathrow

Sun 9/28

9:15 am-6:50 pm

1 stop15h 35m

$659

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 8/17

7:15 pm-4:25 pm

2 stops15h 10m

London Heathrow

Wed 8/27

6:40 am-9:54 pm

2 stops21h 14m

$660

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 7/15

6:15 pm-8:35 am

1 stop32h 20m

London Heathrow

Thu 8/21

7:25 am-2:00 pm

1 stop12h 35m

$661

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Mon 8/11

2:20 pm-8:50 am

1 stop12h 30m

London City

Wed 8/20

7:20 pm-12:10 pm

1 stop22h 50m

$661

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Sun 9/21

7:11 am-9:15 am

2 stops20h 04m

London Luton

Tue 10/7

7:05 pm-2:55 pm

2 stops25h 50m

$661

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Thu 8/14

3:45 pm-7:50 am

1 stop10h 05m

London Stansted

Thu 8/21

8:15 am-2:00 pm

1 stop11h 45m

$661

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Mon 8/11

6:10 pm-3:35 pm

1 stop15h 25m

London Gatwick

Wed 8/20

12:05 pm-12:35 pm

2 stops30h 30m

$662

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

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.

Cheapflights Insights

Everything you need to know about your flight from Illinois to London

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 $1,098). 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 July 1, 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 July 1, 2025.

The most flights from USIL to LON are scheduled on a Monday (51 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (31 on average).

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 July 1, 2025.
Peruse reviews from past customers who have flown with Delta, Porter Airlines, and KLM from Illinois to London to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,974 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,974 reviews
Delta
8.0
Very good
7,974 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Porter Airlines
8.0
Very good
296 reviews
Delta
8.0
Very good
7,974 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,366 reviews
Delta
8.0
Very good
7,974 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Finnair
7.6
Good
1,301 reviews
Delta
8.0
Very good
7,974 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,472 reviews
Delta
8.0
Very good
7,974 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 JetBlue. According to our data, you can fly for as low as $353. Users have also found prices from $355 and $356 on Porter Airlines and Icelandair, 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 Royal Jordanian (80%), Air Canada (76%) or Austrian Airlines (76%) 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 $2,683 for a flight from Illinois to London. The cheapest flight overall is $370 while the most popular route, (Chicago O'Hare Intl - London Heathrow) is currently priced at $446.

  • 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 $1,098). 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
Hounslow
Hayes
Thornton Heath
Canterbury
Harrow
Dover
Gatwick
Orpington
Watford
Croydon
Folkestone
Borehamwood
Aylesbury
Chelmsford
Brentwood
Chichester
Arundel
Milton Keynes
Bishop's Stortford
Dartford

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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 July 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest$257Average$723FlexibilityNo cancel feeOn-time79%
DeltaCheapest$345Average$935FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$381Average$600FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$430Average$917FlexibilityNo cancel feeOn-time76%
IcelandairCheapest$465Average$650FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$507Average$792FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$516Average$869FlexibilityNo cancel feeOn-time62%
Aer LingusCheapest$543Average$800FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$569Average$753FlexibilityNo cancel feeOn-time76%
IberiaCheapest$581Average$870FlexibilityNo cancel feeOn-time77%

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