Cheap flights from London Heathrow Airport to Chicago from £376
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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CHI
5 Sep — 12 Sep1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to Chicago are usually found in February or January, booked 35 days in advance, depart on a Thursday or Saturday and return on a Monday
Cheap flight deals from Heathrow to Chicago
Enter your travel dates to find the best prices.
Cheapest
Best
Direct
Last-minute
One-way
Cheapest flights from Heathrow to Chicago
Explore the most affordable flight options available from Heathrow to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 6 August 2026.
Thu 1/1019:50 -
1 stop26h 10m
Sun 11/1018:00 -
1 stop34h 20m
Deal found 5/8£481
Tue 6/1021:25 -
1 stop26h 50m
Tue 13/1019:25 -
1 stop18h 55m
Deal found 4/8£483
Sun 8/1120:35 -
1 stop26h 45m
Thu 12/1118:30 -
1 stop10h 20m
Deal found 4/8£483
Wed 7/1013:05 -
1 stop14h 20m
Wed 14/1022:25 -
1 stop15h 55m
Deal found 5/8£484
Mon 16/1112:15 -
1 stop11h 05m
Fri 27/1118:30 -
1 stop10h 20m
Deal found 4/8£485
Wed 16/913:05 -
1 stop14h 20m
Fri 9/1022:25 -
1 stop15h 55m
Deal found 5/8£486
Wed 2/907:40 -
1 stop12h 20m
Tue 8/921:00 -
1 stop12h 00m
Deal found 5/8£487
Tue 27/1020:35 -
1 stop26h 45m
Tue 3/1118:30 -
1 stop19h 00m
Deal found 2/8£488
Mon 28/921:25 -
1 stop26h 50m
Fri 9/1022:25 -
1 stop15h 55m
Deal found 5/8£489
Wed 23/913:05 -
1 stop11h 10m
Wed 30/922:25 -
1 stop15h 55m
Deal found 5/8£490
Wed 9/908:40 -
2 stops15h 39m
Wed 23/909:29 -
1 stop15h 41m
Deal found 4/8£607
Mon 14/920:55 -
2 stops27h 38m
Thu 15/1013:27 -
1 stop11h 43m
Deal found 4/8£608
Best flights from Heathrow to Chicago
Discover carefully curated flight deals from Heathrow to Chicago that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 6 August 2026.
Fri 15/112:15 -
1 stop11h 05m
Tue 19/118:30 -
1 stop10h 20m
Deal found 5/8£548
Thu 24/1210:20 -
1 stop12h 25m
Thu 31/1219:15 -
1 stop14h 45m
Deal found 6/8£564
Tue 15/912:15 -
Nonstop8h 40m
Tue 22/916:01 -
1 stop10h 29m
Deal found 1/8£625
Tue 8/914:10 -
Nonstop9h 15m
Mon 14/916:25 -
Nonstop8h 20m
Deal found 3/8£630
Tue 15/920:05 -
1 stop22h 30m
Mon 21/921:35 -
2 stops14h 15m
Deal found 1/8£631
Mon 7/908:40 -
2 stops15h 21m
Mon 21/913:19 -
1 stop11h 51m
Deal found 5/8£634
Mon 28/906:30 -
2 stops17h 49m
Tue 13/1013:27 -
2 stops15h 53m
Deal found 4/8£635
Mon 21/912:25 -
1 stop11h 54m
Tue 13/1013:27 -
1 stop11h 43m
Deal found 3/8£654
Tue 1/913:05 -
1 stop11h 10m
Mon 21/919:25 -
1 stop10h 30m
Deal found 4/8£558
Wed 30/921:05 -
2 stops25h 05m
Sat 10/1019:15 -
2 stops15h 45m
Deal found 4/8£572
Fri 15/106:35 -
1 stop13h 35m
Tue 19/117:45 -
Nonstop8h 10m
Deal found 4/8£639
Wed 21/1021:05 -
2 stops25h 05m
Wed 11/1119:15 -
2 stops17h 35m
Deal found 2/8£587
Wed 2/1206:30 -
2 stops17h 34m
Sun 6/1213:22 -
1 stop12h 23m
Deal found 1/8£665
Wed 23/915:15 -
1 stop13h 29m
Sun 27/913:19 -
1 stop11h 51m
Deal found 1/8£680
Fri 9/1013:25 -
1 stop15h 08m
Tue 13/1017:15 -
1 stop12h 05m
Deal found 3/8£681
Wed 16/921:05 -
2 stops25h 05m
Wed 23/910:29 -
2 stops16h 51m
Deal found 2/8£625
Thu 15/1006:30 -
2 stops17h 30m
Sun 18/1013:27 -
2 stops15h 53m
Deal found 5/8£744
Wed 30/1206:30 -
2 stops16h 20m
Wed 6/113:00 -
2 stops12h 15m
Deal found 4/8£685
Sun 20/908:40 -
2 stops15h 39m
Sun 27/909:29 -
2 stops16h 11m
Deal found 5/8£710
Sat 10/1006:30 -
2 stops16h 17m
Thu 15/1017:31 -
1 stop13h 34m
Deal found 4/8£714
Fri 20/1106:30 -
2 stops16h 09m
Mon 11/113:00 -
2 stops12h 15m
Deal found 4/8£714
Tue 25/808:40 -
2 stops15h 21m
Tue 8/919:13 -
1 stop11h 52m
Deal found 3/8£752
Direct flights from Heathrow to Chicago
Explore direct flight options from Heathrow to Chicago based on user searches, and compare prices and availability for your desired travel dates. Data last updated 6 August 2026.
Tue 5/115:40 -
Nonstop9h 05m
Fri 21/517:00 -
Nonstop7h 50m
Deal found 2/8£507
Fri 1/111:00 -
Nonstop8h 45m
Fri 21/519:05 -
Nonstop8h 00m
Deal found 2/8£529
Mon 4/115:40 -
Nonstop9h 05m
Sat 22/517:00 -
Nonstop7h 50m
Deal found 2/8£530
Fri 20/1115:40 -
Nonstop9h 05m
Mon 11/117:10 -
Nonstop7h 45m
Deal found 5/8£538
Sat 10/1011:10 -
Nonstop8h 40m
Sun 18/1017:00 -
Nonstop7h 50m
Deal found 5/8£544
Wed 16/914:25 -
Nonstop8h 50m
Wed 23/922:25 -
Nonstop7h 50m
Deal found 2/8£559
Sat 5/909:45 -
Nonstop8h 45m
Thu 17/917:55 -
Nonstop7h 45m
Deal found 5/8£584
Sat 5/909:45 -
Nonstop8h 45m
Wed 16/922:25 -
Nonstop7h 50m
Deal found 4/8£585
Thu 10/912:15 -
Nonstop8h 40m
Wed 23/917:55 -
Nonstop7h 45m
Deal found 1/8£586
Wed 7/1014:45 -
Nonstop8h 50m
Wed 14/1021:15 -
Nonstop8h 00m
Deal found 4/8£587
Thu 3/914:25 -
Nonstop8h 50m
Thu 10/920:50 -
Nonstop8h 00m
Deal found 2/8£587
Tue 22/911:10 -
Nonstop8h 40m
Tue 29/920:50 -
Nonstop8h 00m
Deal found 1/8£588
Last-minute flights from Heathrow to Chicago
Discover last-minute flight deals from Heathrow to Chicago. Data last updated 6 August 2026 and is based on user searches.
Tue 1/913:05 -
1 stop11h 10m
Tue 8/919:25 -
1 stop18h 55m
Deal found 4/8£492
Tue 1/913:05 -
1 stop11h 10m
Wed 16/919:25 -
1 stop10h 30m
Deal found 3/8£495
Wed 2/907:40 -
1 stop12h 20m
Tue 8/921:00 -
1 stop12h 00m
Deal found 5/8£487
Wed 2/913:05 -
1 stop11h 10m
Wed 9/922:25 -
1 stop15h 55m
Deal found 5/8£494
Wed 2/906:30 -
2 stops16h 29m
Wed 30/909:29 -
2 stops18h 51m
Deal found 1/8£605
Tue 8/907:40 -
1 stop12h 20m
Tue 8/921:00 -
1 stop12h 00m
Deal found 4/8£492
Wed 9/908:40 -
2 stops15h 39m
Wed 23/909:29 -
1 stop15h 41m
Deal found 4/8£607
Mon 14/912:15 -
1 stop12h 22m
Tue 15/918:35 -
Nonstop8h 25m
Deal found 5/8£483
Wed 16/913:05 -
1 stop14h 20m
Fri 9/1022:25 -
1 stop15h 55m
Deal found 5/8£486
Tue 22/921:25 -
1 stop26h 50m
Tue 29/919:25 -
1 stop10h 30m
Deal found 5/8£493
Wed 23/913:05 -
1 stop11h 10m
Wed 30/922:25 -
1 stop15h 55m
Deal found 5/8£490
Mon 28/921:25 -
1 stop26h 50m
Fri 9/1022:25 -
1 stop15h 55m
Deal found 5/8£489
One-way flights from Heathrow to Chicago
Search for one-way flight options from Heathrow to Chicago. Find affordable one-way fares based on user searches. Data last updated 6 August 2026.
Fri 4/920:50 -
2 stops25h 15m
Deal found 5/8£376
Thu 26/1109:55 -
2 stops35h 35m
Deal found 5/8£377
Tue 1/909:55 -
2 stops41h 25m
Deal found 4/8£377
Thu 1/1021:05 -
3 stops27h 10m
Deal found 3/8£378
Tue 25/809:55 -
2 stops34h 50m
Deal found 2/8£380
Mon 21/906:00 -
1 stop12h 35m
Deal found 5/8£380
Tue 3/1109:00 -
1 stop13h 15m
Deal found 4/8£381
Sun 13/920:05 -
1 stop22h 30m
Deal found 1/8£382
Wed 23/921:05 -
3 stops27h 10m
Deal found 6/8£382
Sat 12/915:00 -
2 stops50h 00m
Deal found 3/8£382
Mon 5/1008:40 -
1 stop13h 15m
Deal found 3/8£383
Thu 27/819:10 -
2 stops26h 50m
Deal found 4/8£384
Find flight deals from Heathrow to Chicago
Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Chicago (CHI). 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 6 August 2026.
Customise your flight search to find flights from Heathrow to Chicago 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 6 August 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Chicago that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Cheapest return flight
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Fri 15/1
12:15-17:20
1 stop11h 05m
Chicago O'Hare Intl
Tue 19/1
18:30-10:50
1 stop10h 20m
£548
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Tue 1/9
13:05-18:15
1 stop11h 10m
Chicago O'Hare Intl
Mon 21/9
19:25-11:55
1 stop10h 30m
£558
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Thu 24/12
10:20-16:45
1 stop12h 25m
Chicago O'Hare Intl
Thu 31/12
19:15-16:00
1 stop14h 45m
£564
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Wed 30/9
21:05-16:10
2 stops25h 05m
Chicago O'Hare Intl
Sat 10/10
19:15-17:00
2 stops15h 45m
£572
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Wed 21/10
21:05-16:10
2 stops25h 05m
Chicago O'Hare Intl
Wed 11/11
19:15-18:50
2 stops17h 35m
£587
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Wed 16/9
21:05-16:10
2 stops25h 05m
Chicago O'Hare Intl
Wed 23/9
10:29-09:20
2 stops16h 51m
£625
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Tue 15/9
12:15-14:55
Nonstop8h 40m
Chicago O'Hare Intl
Tue 22/9
16:01-08:30
1 stop10h 29m
£625
Fastest return journey
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Tue 8/9
14:10-17:25
Nonstop9h 15m
Chicago O'Hare Intl
Mon 14/9
16:25-06:45
Nonstop8h 20m
£630
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Tue 15/9
20:05-12:35
1 stop22h 30m
Chicago O'Hare Intl
Mon 21/9
21:35-17:50
2 stops14h 15m
£631
LondonChicago
LHR London Heathrow - MDW Chicago Midway
LHRMDW
London Heathrow
Mon 7/9
08:40-18:01
2 stops15h 21m
Chicago Midway
Mon 21/9
13:19-07:10
1 stop11h 51m
£634
Flights are sorted by cheapest return flights first.
Deals found on 1/8
Showing 1-10 of 42 resultsSorted by cheapest first
1
2
3
...
5
Best time to book a flight from Heathrow to Chicago
Have a flexible travel schedule? Discover the best time to fly to Chicago from Heathrow with our price prediction graph.
LHR-CHI
LHR-ORD
LHR-MDW
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 London Heathrow Airport to Chicago
LHR-CHI
LHR-ORD
LHR-MDW
What is the cheapest month to book a flight from London Heathrow Airport to Chicago?
Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago (average of £459). Flying from London Heathrow Airport to Chicago in July is currently the most expensive (average of £775). 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 LHR to CHI?
Find hourly flight availability from Heathrow to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 6 August 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Chicago as you normally would.
Weekly flight availability from London Heathrow Airport to Chicago
Explore weekly flight availability from Heathrow to Chicago. 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 6 August 2026.
The most flights from LHR to CHI are scheduled on a Monday (52 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (35 on average).
How much does it cost for a return flight from London Heathrow Airport to Chicago?
Airfare is below average for this route at the moment.
London Heathrow Airport to Chicago flights typically cost between £562 and £859 in October.The cheapest return price found within the last 5 days was £481 on TAP AIR PORTUGAL (1 Oct–11 Oct).
What’s the top stopover airport for flights from London Heathrow Airport to Chicago?
Share of one-stop return flights from London Heathrow Airport to Chicago chosen by Cheapflights users in the past 12 months, using the same stopover each way.
Reykjavik (KEF) – chosen by Cheapflights users on 41% of one-stop itineraries from London Heathrow Airport to Chicago on Cheapflights.
What’s the cheapest stopover airport for flights from London Heathrow Airport to Chicago?
Average return fare for one-stop flights from London Heathrow Airport to Chicago, chosen by Cheapflights users in the past 12 months, with the same stopover each way.
Zurich (ZRH) is the most affordable one-stop option, with an average return flight price of £359.
What’s the fastest stopover option from London Heathrow Airport to Chicago?
Shortest average travel time for one-stop one-way flights from London Heathrow Airport to Chicago, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.
Flights via Montreal (YUL) have the shortest average one-way travel time for one-stop routes: 11h 14m.
Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Chicago?
Average stopover duration for one-stop one-way flights from London Heathrow Airport to Chicago, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Montreal (YUL) offer the fastest connection on this route, with an average stopover time of 1h 17m.
How often are flights from London to Chicago delayed?
About 11% of weekly flights between London and Chicago have experienced delays in the past year, with the average delay time being 182 minutes.
What is the most punctual flight time for London to Chicago flights?
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Wednesday tends to have the lowest number of delays on this route, whereas Tuesday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on London to Chicago flights?
Over the past year, United Airlines have had the lowest number of delays on this route, with just 6% of flights being delayed.
How far ahead should I book a flight from London Heathrow Airport to Chicago?
Booking 79 days in advance of your planned departure date is, on average, the best time to get cheap flights from London Heathrow Airport to Chicago. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Reviews of airlines servicing Chicago
Get insights into the airlines that provide service to Chicago. 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 Chicago. Reviews last updated 6 August 2026.
See what other customers who have flown with United Airlines,Aer Lingus, andIcelandair from London Heathrow Airport to Chicago have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Related info for your journey
Find useful and relevant information for your journey from Heathrow to Chicago. 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 London Heathrow Airport to Chicago?
There are many flights that can get you from London Heathrow Airport to Chicago in 11h 05m. Fly via Icelandair, Scandinavian Airlines, or Delta to get the fastest option. London Heathrow Airport and Chicago are separated by a distance of 3939 mi. This flight may include one or multiple stops.
What are the cheapest airlines flying from London Heathrow Airport to Chicago round-trip?
Currently priced at £301, Virgin Atlantic will fly you from London Heathrow Airport to Chicago and back. In addition to Virgin Atlantic, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Aer Lingus and Icelandair - these airlines can fly you to your destination from £363 and £366, respectively. These flights start at 50% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from London Heathrow Airport to Chicago one-way?
To fly one-way, consider booking your trip with JetBlue, which is currently one of the cheapest options available, starting at £310. Icelandair flights start at £324 while deals on TAP AIR PORTUGAL start at £339 one-way.
What are the most reliable airlines from London Heathrow Airport to Chicago?
Before booking your flight to Chicago from London Heathrow Airport, check out the most reliable airlines to get you to your destination on time: Air Canada (90%), Austrian Airlines (90%), United Airlines( 90%).
What are the cheapest flights from London Heathrow Airport to Chicago?
Looking for the cheapest flight from London Heathrow Airport to Chicago? While on average our users pay £2,828, our data indicates the cheapest price to be £402. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £403.
Can I find deals for business class flights from Heathrow to Chicago?
Yes. Cheapflights offers flight deals from Heathrow to Chicago 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 London Heathrow Airport to Chicago?
Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago (average of £459). Flying from London Heathrow Airport to Chicago in July is currently the most expensive (average of £775). 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.
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.
Airlines
Alternative routes
Chicago flight routes
Complete your trip
Direct flights to Illinois
Flights by cabin class
Other flight options
Other flights from Heathrow
Popular flights
Fly from Heathrow to Chicago on these airlines
Choose from the following airlines for your flight from Heathrow to Chicago. Flights are based on user searches made on Cheapflights and were last updated on 6 August 2026.
Explore flights to Chicago departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 6 August 2026.
Discover the top 10 airlines that operate flights from Heathrow to Chicago. 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 6 August 2026.
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 Heathrow to Chicago?
Cheapflights makes it easy to find Heathrow to Chicago 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 Heathrow to Chicago?
Cheapflights helps you find that perfect flight to Chicago from Heathrow by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!
Can Cheapflights find flights from Heathrow to Chicago with no change fees?
Certainly. Search results for flights to Chicago from Heathrow shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.
Can Cheapflights notify me if prices for flights from Heathrow to Chicago become cheaper?
Yes, Cheapflights offers price alerts on Heathrow to Chicago flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
We value your privacy
Cheapflights and its partners wish to use cookies or similar technologies to store and/or access information on and about your device and process personal data such as your IP address, device identifiers etc., in order to improve your experience on the site, to analyse navigation, to offer and measure personalised advertising, and to facilitate sharing on social networks. We also allow the use of third-party cookies (including those from our advertising partners) on our sites.
By clicking 'Accept', you consent to your data being processed by 0 vendors on this web site for the purposes described in this notice. You can review the vendors and their individual processing purposes on the .
To review individual processing purposes and cookie categories, please click ’Select individual purposes’. You can review your choices and withdraw your consent at any time by clicking the ’Privacy Preferences’ link in the page side navigation.