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Cheap flights from Chicago O'Hare Intl Airport to London Heathrow Airport from C$ 466

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 16/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LHR
20 Jul — 27 Jul1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Chicago O'Hare Intl to London Heathrow are usually found in January or October, booked 49 days in advance, depart on a Monday or Friday and return on a Friday

Cheap flight deals from O'Hare Intl to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from O'Hare Intl to Heathrow
Explore the most affordable flight options available from O'Hare Intl to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 June 2026.

Sun 20/91:35 p.m.
ORD
-
LHR
1 stop10h 50m
British Airways
Sat 12/1211:00 a.m.
LHR
-
ORD
Nonstop8h 50m
British Airways
Deal found 16/6C$ 1,302
Mon 17/86:15 p.m.
ORD
-
LHR
Nonstop8h 15m
United Airlines
Wed 23/96:50 a.m.
LHR
-
ORD
1 stop11h 10m
United Airlines
Deal found 16/6C$ 1,309
Sun 27/96:35 p.m.
ORD
-
LHR
Nonstop8h 25m
United Airlines
Fri 23/1010:50 a.m.
LHR
-
ORD
1 stop13h 25m
United Airlines
Deal found 16/6C$ 1,311
Sun 6/99:15 p.m.
ORD
-
LHR
Nonstop8h 00m
Finnair
Thu 17/97:30 a.m.
LHR
-
ORD
1 stop16h 20m
Finnair
Deal found 15/6C$ 1,312
Mon 10/89:40 p.m.
ORD
-
LHR
Nonstop8h 15m
Multiple Airlines
Wed 19/88:05 p.m.
LHR
-
ORD
1 stop22h 30m
Multiple Airlines
Deal found 15/6C$ 1,314
Tue 4/88:45 a.m.
ORD
-
LHR
1 stop15h 45m
United Airlines
Fri 21/88:40 a.m.
LHR
-
ORD
1 stop13h 15m
United Airlines
Deal found 15/6C$ 1,315
Sun 8/119:45 p.m.
ORD
-
LHR
Nonstop7h 50m
British Airways
Sun 15/1111:00 a.m.
LHR
-
ORD
Nonstop8h 50m
British Airways
Deal found 15/6C$ 1,316
Sun 19/75:30 a.m.
ORD
-
LHR
1 stop19h 45m
Delta
Wed 19/88:40 a.m.
LHR
-
ORD
1 stop11h 50m
Delta
Deal found 16/6C$ 1,318
Fri 20/113:55 p.m.
ORD
-
LHR
1 stop10h 10m
Aer Lingus
Fri 27/1112:10 p.m.
LHR
-
ORD
1 stop12h 15m
Aer Lingus
Deal found 16/6C$ 1,319
Thu 10/124:03 p.m.
ORD
-
LHR
1 stop10h 37m
British Airways
Wed 16/1211:00 a.m.
LHR
-
ORD
Nonstop8h 50m
British Airways
Deal found 16/6C$ 1,322
Tue 11/84:30 p.m.
ORD
-
LHR
Nonstop8h 15m
United Airlines
Thu 20/87:30 a.m.
LHR
-
ORD
1 stop13h 25m
United Airlines
Deal found 15/6C$ 1,325

Find flight deals from O'Hare Intl to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) to Heathrow (LHR). 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 20 June 2026.

Round-trip from

C$ 1,302

One-way from

C$ 466

Popular in

June

Cheapest in

January

Average price

C$ 1,948

Good one-way deal

C$ 3,954 or less
British Airways
  • British Airways
  • 14/9-13/12
  • 1 total stop
  • 19h 55m total
  • Chicago to London
Search Deals
Delta
  • Delta
  • 16/9
  • 2 total stops
  • 18h 10m total
  • Chicago to London
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (C$ 533 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (C$ 104 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a one-way flight from Chicago O'Hare Intl to London Heathrow.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from O'Hare Intl to Heathrow 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 629,999 searches. Data last updated 20 June 2026.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 18/8

6:45 p.m.-9:00 a.m.

Nonstop8h 15m

London Heathrow

Fri 11/12

6:35 a.m.-6:25 p.m.

1 stop17h 50m

C$ 1,311

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 23/8

4:30 p.m.-6:45 a.m.

Nonstop8h 15m

London Heathrow

Mon 31/8

5:50 p.m.-12:00 p.m.

1 stop24h 10m

C$ 1,328

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 1/10

7:05 p.m.-9:05 a.m.

Nonstop8h 00m

London Heathrow

Mon 5/10

10:20 a.m.-5:50 p.m.

1 stop13h 30m

C$ 1,349

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 17/9

7:05 p.m.-9:05 a.m.

Nonstop8h 00m

London Heathrow

Sat 26/9

9:45 a.m.-12:30 p.m.

Nonstop8h 45m

C$ 1,374

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 6/11

3:45 p.m.-5:55 a.m.

Nonstop8h 10m

London Heathrow

Sat 14/11

1:35 p.m.-4:55 p.m.

Nonstop9h 20m

C$ 1,386
Quickest round-trip

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 2/10

5:00 p.m.-6:50 a.m.

Nonstop7h 50m

London Heathrow

Mon 12/10

1:10 p.m.-3:55 p.m.

Nonstop8h 45m

C$ 1,389

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 30/7

1:00 p.m.-6:20 a.m.

1 stop11h 20m

London Heathrow

Thu 13/8

8:40 a.m.-8:30 p.m.

2 stops17h 50m

C$ 1,445

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 8/8

8:05 a.m.-6:25 a.m.

1 stop16h 20m

London Heathrow

Sat 15/8

8:40 a.m.-5:41 p.m.

2 stops15h 01m

C$ 1,532

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 29/7

4:30 p.m.-6:45 a.m.

Nonstop8h 15m

London Heathrow

Sun 9/8

7:25 a.m.-2:00 p.m.

1 stop12h 35m

C$ 1,741

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 17/7

4:30 p.m.-6:45 a.m.

Nonstop8h 15m

London Heathrow

Thu 23/7

7:25 a.m.-2:00 p.m.

1 stop12h 35m

C$ 1,785

Flights are sorted by cheapest round-trip flights first.

Deals found on 18/6

Showing 1-10 of 23 resultsSorted by cheapest first
1
2
3

Best time to book a flight from O'Hare Intl to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from O'Hare Intl 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 Chicago O'Hare Intl Airport to London Heathrow Airport

How far ahead should I book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport?

Booking 48 days in advance of your planned departure date is, on average, the best time to get cheap flights from Chicago O'Hare Intl Airport to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport?

Currently, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport (average of C$ 902). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of C$ 1,948). 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 ORD to LHR?

Find hourly flight availability from O'Hare Intl to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 20 June 2026.

When flying from Chicago O'Hare Intl Airport to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from Chicago O'Hare Intl Airport to London Heathrow Airport?

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated 20 June 2026.
Read through reviews of airlines operating flights from Chicago O'Hare Intl Airport to London Heathrow Airport, such as British Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
8,055 reviews
Check prices

Comfort

6.8

Crew

7.7

Entertainment

6.4

Boarding

6.9

Overall

6.7

Food

6.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

IAH - LHR

Airline was good the flight attendant were very helpful and kind. The problem I had is with cheap tickets, my ticket was not allowed one check in baggage this was new to me. I do a lot of traveling overseas and 1 check in baggage is always allowed. Also I bought insurance for my ticket it proved to be useless. I have called several times and spoke to your customer service, not one single person mentioned it to me that baggage was not allowed. All this additional expense was too much for me. I even asked one of your customer service representative I need to buy extra baggage should I buy it now and he told me when you receive check in information you can buy it @ that time never mentioned it to me that my ticket didn’t include baggage. It was very frustrating. I will never use cheap ticket again.
British Airways
6.7
Okay
8,055 reviews
British Airways
6.7
Okay
8,055 reviews
Check prices

Comfort

6.8

Crew

7.7

Entertainment

6.4

Boarding

6.9

Overall

6.7

Food

6.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

IAH - LHR

Airline was good the flight attendant were very helpful and kind. The problem I had is with cheap tickets, my ticket was not allowed one check in baggage this was new to me. I do a lot of traveling overseas and 1 check in baggage is always allowed. Also I bought insurance for my ticket it proved to be useless. I have called several times and spoke to your customer service, not one single person mentioned it to me that baggage was not allowed. All this additional expense was too much for me. I even asked one of your customer service representative I need to buy extra baggage should I buy it now and he told me when you receive check in information you can buy it @ that time never mentioned it to me that my ticket didn’t include baggage. It was very frustrating. I will never use cheap ticket again.

Related info for your journey

Find useful and relevant information for your journey from O'Hare Intl to Heathrow. 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 O'Hare Intl Airport to London Heathrow Airport?

    For as low as C$ 1,349, United Airlines can have you in London Heathrow Airport from Chicago O'Hare Intl Airport in 8h. The distance from Chicago O'Hare Intl Airport to London Heathrow Airport is about 6339 km. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from Chicago O'Hare Intl Airport to London Heathrow Airport round-trip?

    Currently priced at C$ 656, British Airways will fly you from Chicago O'Hare Intl Airport to London Heathrow Airport and back. In addition to British Airways, many other airlines offer competitively priced options for your trip. British Airways is priced at 43% lower than the current average price of a flight leaving 3 months from now.

  • What are the most reliable airlines from Chicago O'Hare Intl Airport to London Heathrow Airport?

    The top 3 most reliable airlines when flying from Chicago O'Hare Intl Airport to London Heathrow Airport are Air Canada (72%), Austrian Airlines (72%) and United Airlines (72%).

  • What are the cheapest flights from Chicago O'Hare Intl Airport to London Heathrow Airport?

    Looking for the cheapest flight from Chicago O'Hare Intl Airport to London Heathrow Airport? While on average our users pay C$ 3,954, our data indicates the cheapest price to be C$ 1,544. The most popular route (Chicago O'Hare Intl - London Heathrow), is priced around C$ 1,326.

  • Can I find deals for flights from O'Hare Intl to Heathrow that include hotel bookings?

    Yes. In addition to deals on O'Hare Intl to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from O'Hare Intl to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from O'Hare Intl to Heathrow.

  • Can I find deals for business class flights from O'Hare Intl to Heathrow?

    Yes. Cheapflights offers flight deals from O'Hare Intl to Heathrow 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 O'Hare Intl Airport to London Heathrow Airport?

    Currently, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport (average of C$ 902). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of C$ 1,948). 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 Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Gatwick
Romford
Twickenham
Ilford
Bromley
Sutton
Hounslow
Slough
Marlow
Cobham
Leamington Spa
Northampton
Watford
Luton
High Wycombe
Stratford-upon-Avon
Moreton-in-Marsh

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from O'Hare Intl to Heathrow

Discover the top airline that operate flights from O'Hare Intl to Heathrow. 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 629,999 searches. Data last updated 20 June 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapestC$ 656AverageC$ 740FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

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How does Cheapflights help users find flights from O'Hare Intl to Heathrow?

Deals for O'Hare Intl to Heathrow flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from O'Hare Intl to Heathrow?

Cheapflights simply makes it quick and affordable to book flights from O'Hare Intl to Heathrow by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from O'Hare Intl to Heathrow with no change fees?

Certainly. Search results for flights to Heathrow from O'Hare Intl 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 O'Hare Intl to Heathrow become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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