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Cheap flights from Chicago to London from £280

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 26/4. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — LON
18 Apr — 25 Apr1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Chicago to London are usually found in February or September, booked 33 days in advance, depart on a Sunday or Monday and return on a Wednesday

Cheap flight deals from Chicago to London

Enter your travel dates to find the best prices.

Cheapest flights from Chicago to London
Explore the most affordable flight options available from Chicago to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 March 2026.

Sat 9/518:05
ORD
-
LHR
1 stop34h 15m
TAP AIR PORTUGAL
Sat 16/519:50
LHR
-
ORD
1 stop26h 10m
TAP AIR PORTUGAL
Deal found 15/3£443
Sun 12/418:00
ORD
-
LGW
1 stop33h 45m
TAP AIR PORTUGAL
Tue 21/416:25
LGW
-
ORD
1 stop29h 35m
TAP AIR PORTUGAL
Deal found 15/3£451
Thu 5/1119:20
ORD
-
LHR
2 stops56h 15m
Scandinavian Airlines
Mon 9/1106:40
LHR
-
ORD
1 stop16h 05m
Scandinavian Airlines
Deal found 15/3£452
Mon 20/419:15
ORD
-
LHR
1 stop14h 45m
Scandinavian Airlines
Mon 4/506:40
LHR
-
ORD
1 stop15h 30m
Scandinavian Airlines
Deal found 14/3£453
Mon 13/419:25
ORD
-
LGW
1 stop13h 15m
Icelandair
Mon 20/415:40
LGW
-
ORD
1 stop32h 35m
Icelandair
Deal found 15/3£455
Thu 9/419:25
ORD
-
STN
2 stops23h 05m
Multiple Airlines
Thu 16/407:20
STN
-
ORD
2 stops16h 55m
Multiple Airlines
Deal found 15/3£455
Sun 11/1019:15
ORD
-
LHR
2 stops15h 10m
Scandinavian Airlines
Sun 18/1019:50
LHR
-
ORD
2 stops26h 20m
Scandinavian Airlines
Deal found 17/3£456
Thu 7/519:25
ORD
-
STN
2 stops23h 05m
Multiple Airlines
Mon 11/508:15
STN
-
ORD
2 stops16h 00m
Multiple Airlines
Deal found 15/3£457
Sun 11/1019:15
ORD
-
LHR
1 stop16h 25m
Scandinavian Airlines
Sat 24/1015:35
LHR
-
ORD
2 stops32h 10m
Scandinavian Airlines
Deal found 16/3£458
Tue 28/411:25
ORD
-
LTN
2 stops28h 05m
Multiple Airlines
Tue 5/521:50
LTN
-
ORD
2 stops26h 25m
Multiple Airlines
Deal found 14/3£458
Sun 12/419:25
ORD
-
STN
2 stops21h 55m
Multiple Airlines
Fri 17/406:20
STN
-
ORD
2 stops17h 55m
Multiple Airlines
Deal found 16/3£458
Tue 6/1019:15
ORD
-
LHR
2 stops15h 10m
Scandinavian Airlines
Tue 13/1009:55
LHR
-
ORD
2 stops36h 15m
Scandinavian Airlines
Deal found 17/3£459

Find flight deals from Chicago to London

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) 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 19 March 2026.

Round-trip from

£443

One-way from

£280

Popular in

June

Cheapest in

February

Average price

£530

Good round-trip deal

£528 or less

Good one-way deal

£299 or less
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 9/5-16/5
  • 2 total stops
  • 60h 25m total
  • Chicago to London
Search Deals
28/7
  • 28/7
  • 2 total stops
  • 17h 45m total
  • Chicago to London
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£112 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from Chicago (CHI) to London (LON).
Search Deals
Price to beat on a one-way flight from Chicago (CHI) to London (LON).
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Chicago 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 858,174 searches. Data last updated 19 March 2026.
Use the filters below to find and compare flights from Chicago to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Mon 13/4

19:25-15:45

2 stops14h 20m

London Luton

Tue 21/4

09:40-18:15

2 stops14h 35m

£485

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Sat 18/4

20:10-09:55

1 stop31h 45m

London Stansted

Wed 22/4

17:45-09:40

1 stop21h 55m

£491

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Wed 29/4

20:10-22:10

1 stop20h 00m

London Stansted

Tue 5/5

17:35-09:40

1 stop22h 05m

£500

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Fri 24/4

20:10-09:55

1 stop31h 45m

London Stansted

Mon 27/4

10:50-09:40

1 stop28h 50m

£518

ChicagoLondon

MDW - LGW

MDWLGW

Chicago Midway

Sat 4/4

06:00-10:00

1 stop22h 00m

London Gatwick

Fri 24/4

14:00-16:13

1 stop32h 13m

£527

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Sun 23/8

21:00-13:25

1 stop10h 25m

London Luton

Wed 2/9

07:15-17:50

2 stops16h 35m

£539

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Sat 5/9

20:10-09:55

1 stop31h 45m

London Stansted

Wed 9/9

06:55-09:40

1 stop32h 45m

£539

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Sun 6/9

20:10-22:10

1 stop20h 00m

London Stansted

Sun 20/9

17:35-18:15

1 stop30h 40m

£547

ChicagoLondon

MDW - LGW

MDWLGW

Chicago Midway

Mon 20/4

09:14-10:00

1 stop18h 46m

London Gatwick

Wed 22/4

14:00-07:26

1 stop23h 26m

£557

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Tue 18/8

22:25-11:45

1 stop31h 20m

London Gatwick

Mon 31/8

15:40-21:25

1 stop11h 45m

£580

Flights are sorted by cheapest return flights first.

Deals found on 16/3

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Chicago to London

Have a flexible travel schedule? Discover the best time to fly to London from Chicago 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.

Cheapflights Insights

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

How far ahead should I book a flight from Chicago to London?

Use this chart to determine the optimal time to book a return flight from Chicago to London. Price data was last updated on 13 March 2026.

The best time to book flights from Chicago to London is 33 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Chicago to London?

Currently, June is the cheapest month in which you can book a flight from Chicago to London (average of £47). Flying from Chicago to London in July is currently the most expensive (average of £456). 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 CHI to LON?

Find hourly flight availability from Chicago 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 19 March 2026.

When flying from Chicago to London, 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 Chicago to London

Explore weekly flight availability from Chicago 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 19 March 2026.

The most flights from CHI to LON are scheduled on a Monday (45 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (42 on average).

How much does it cost for a return flight from Chicago to London?

What’s the top stopover airport for flights from Chicago to London?

Share of one-stop return flights from Chicago to London chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Reykjavik (KEF) – chosen by Cheapflights users on 39% of one-stop itineraries from Chicago to London on Cheapflights.

What’s the cheapest stopover airport for flights from Chicago to London?

Average return fare for one-stop flights from Chicago to London, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Lisbon (LIS) is the most affordable one-stop option, with an average return flight price of £314.

What’s the fastest stopover option from Chicago to London?

Shortest average travel time for one-stop one-way flights from Chicago to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Amsterdam (AMS) have the shortest average one-way travel time for one-stop routes: 9h 50m.

Which airport typically offers the quickest stopover for flights from Chicago to London?

Average stopover duration for one-stop one-way flights from Chicago to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average stopover time of 0h 55m.

How often are flights from Chicago to London delayed?

About 26% of weekly flights between Chicago and London have experienced delays in the past year, with the average delay time being 169 minutes.

What is the most punctual flight time for Chicago to London flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Chicago to London flights?

Over the past year, American Airlines have had the lowest number of delays on this route, with just 25% of flights being delayed.

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 19 March 2026.
Read reviews from past customers who have flown with United Airlines,Aer Lingus, andAmerican Airlines from Chicago to London. 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.
United Airlines
7.4
Good
9,443 reviews
Check prices

Food

6.6

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,443 reviews
United Airlines
7.4
Good
9,443 reviews
Check prices

Food

6.6

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Aer Lingus
7.2
Good
1,478 reviews
United Airlines
7.4
Good
9,443 reviews
Check prices

Food

6.6

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
American Airlines
7.1
Good
11,476 reviews
United Airlines
7.4
Good
9,443 reviews
Check prices

Food

6.6

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Iberia
7.0
Good
3,142 reviews
United Airlines
7.4
Good
9,443 reviews
Check prices

Food

6.6

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
British Airways
6.7
Okay
7,801 reviews
United Airlines
7.4
Good
9,443 reviews
Check prices

Food

6.6

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

Find useful and relevant information for your journey from Chicago to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Chicago to London?

    Turkish Airlines, Delta, and Icelandair can get you from Chicago to London in just under 10h 33m. Your travel time can differ by up to 21h 12m. There are 3939 mi between Chicago and London. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Chicago to London round-trip?

    Our cheapest airline available from Chicago to London is Lufthansa. Our recent data shows that you can find tickets from as low as £361 on this airline. Additional options worth looking into are American Airlines and Finnair, starting at £388 and £417 round-trip. These flights start at 35% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Chicago to London one-way?

    £166 is the cheapest one-way deal found within the past few days, from TAP AIR PORTUGAL. You may also be able to find cheap deals on Lufthansa and British Airways, with prices starting from £278 and £283, respectively.

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

    The most popular route from Chicago to London is Chicago O'Hare Intl - London Heathrow. You may also consider Chicago O'Hare Intl - London Gatwick or Chicago O'Hare Intl - London City.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Chicago to London on time: Aer Lingus (80%), Air Canada (77%), Austrian Airlines (77%).

  • What are the cheapest flights from Chicago to London?

    On average you can expect to pay £675 for a flight from Chicago to London. The cheapest flight overall is £222 while the most popular route, (Chicago O'Hare Intl - London Heathrow) is currently priced at £419.

  • Can I find deals for flights from Chicago to London that include hotel bookings?

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

  • How can I find direct flights from Chicago to London?

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

  • Can I find deals for business class flights from Chicago to London?

    Yes. Cheapflights offers flight deals from Chicago 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 Chicago to London?

    Currently, June is the cheapest month in which you can book a flight from Chicago to London (average of £47). Flying from Chicago to London in July is currently the most expensive (average of £456). 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

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Milton Keynes
Wembley
Croydon
Luton
Hounslow
Slough
Gatwick
Ilford
Hayes
Brentford
Colchester
Guildford
Watford
Kingston upon Thames
Eastbourne
Romford
Ipswich
Bedford
Chelmsford
Southend-on-Sea

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.

Top 7 airlines flying from Chicago to London

Discover the top 7 airlines that operate flights from Chicago 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 858,174 searches. Data last updated 19 March 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£361Average£519FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
American AirlinesCheapest£388Average£617FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
FinnairCheapest£417Average£567FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest£426Average£591FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£453Average£585FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
United AirlinesCheapest£465Average£669FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IberiaCheapest£496Average£605FlexibilityNo cancel feeOn-time77%
Search Iberia 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 Chicago to London?

Cheapflights makes it easy to find Chicago to London flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Chicago to London?

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 London from Chicago.

Can Cheapflights find flights from Chicago to London with no change fees?

Yes! Cheapflights helps users easily find flights from Chicago to London with no change fees.

Can Cheapflights notify me if prices for flights from Chicago to London become cheaper?

Yes! Start tracking prices for Chicago to London flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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