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Cheap flights from Chicago O'Hare Intl Airport to London Heathrow Airport from C$ 581

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 28/7. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LHR
31 May — 7 Jun1
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 November, booked 88 days in advance, depart on a Monday or Friday and return on a Thursday

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 1 May 2026.

Wed 13/510:25 p.m.
ORD
-
LHR
1 stop15h 55m
Icelandair
Tue 19/51:05 p.m.
LHR
-
ORD
1 stop11h 10m
Icelandair
Deal found 27/4C$ 1,036
Sun 8/117:20 p.m.
ORD
-
LHR
1 stop17h 10m
Scandinavian Airlines
Tue 17/116:40 a.m.
LHR
-
ORD
1 stop16h 05m
Scandinavian Airlines
Deal found 28/4C$ 1,058
Tue 20/107:15 p.m.
ORD
-
LHR
2 stops17h 35m
Scandinavian Airlines
Tue 27/1010:20 a.m.
LHR
-
ORD
1 stop12h 25m
Scandinavian Airlines
Deal found 27/4C$ 1,088
Sun 18/107:15 p.m.
ORD
-
LHR
1 stop14h 45m
Scandinavian Airlines
Tue 27/1010:20 a.m.
LHR
-
ORD
1 stop12h 25m
Scandinavian Airlines
Deal found 28/4C$ 1,099
Wed 5/87:25 p.m.
ORD
-
LHR
1 stop18h 55m
Icelandair
Wed 19/89:25 p.m.
LHR
-
ORD
1 stop26h 50m
Icelandair
Deal found 28/4C$ 1,124
Mon 17/87:15 p.m.
ORD
-
LHR
1 stop14h 45m
Scandinavian Airlines
Fri 28/87:50 p.m.
LHR
-
ORD
2 stops31h 46m
Scandinavian Airlines
Deal found 30/4C$ 1,141
Tue 4/89:15 p.m.
ORD
-
LHR
Nonstop8h 00m
Finnair
Tue 25/87:30 a.m.
LHR
-
ORD
1 stop16h 20m
Finnair
Deal found 30/4C$ 1,151
Sat 17/107:15 p.m.
ORD
-
LHR
1 stop14h 45m
Scandinavian Airlines
Mon 26/106:40 a.m.
LHR
-
ORD
1 stop16h 05m
Scandinavian Airlines
Deal found 28/4C$ 1,153
Tue 4/87:05 p.m.
ORD
-
LHR
1 stop11h 55m
SWISS
Tue 25/87:00 a.m.
LHR
-
ORD
2 stops14h 55m
SWISS
Deal found 30/4C$ 1,156
Sun 23/87:15 p.m.
ORD
-
LHR
1 stop17h 15m
Scandinavian Airlines
Wed 2/96:40 a.m.
LHR
-
ORD
2 stops21h 26m
Scandinavian Airlines
Deal found 27/4C$ 1,157

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 1 May 2026.

Round-trip from

C$ 1,036

One-way from

C$ 581

Popular in

June

Cheapest in

January

Average price

C$ 1,109

Good one-way deal

C$ 526 or less
Icelandair
  • Icelandair
  • 13/5-19/5
  • 2 total stops
  • 27h 05m total
  • Chicago to London
Search Deals
Icelandair
  • Icelandair
  • 17/8
  • 1 total stop
  • 10h 30m total
  • Chicago to London
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (C$ 415 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (C$ 85 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 1 May 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 29/9

5:50 p.m.-7:40 a.m.

Nonstop7h 50m

London Heathrow

Fri 23/10

7:30 a.m.-5:50 p.m.

1 stop16h 20m

C$ 1,166

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 22/8

7:15 p.m.-6:50 p.m.

2 stops17h 35m

London Heathrow

Mon 31/8

7:05 a.m.-4:10 p.m.

2 stops15h 05m

C$ 1,188
Quickest round-trip

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 10/8

6:15 p.m.-8:30 a.m.

Nonstop8h 15m

London Heathrow

Thu 20/8

2:10 p.m.-5:15 p.m.

Nonstop9h 05m

C$ 1,206

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 14/8

8:45 a.m.-10:00 a.m.

1 stop19h 15m

London Heathrow

Fri 21/8

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

1 stop12h 35m

C$ 1,240

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 15/10

7:00 a.m.-9:20 a.m.

2 stops20h 20m

London Heathrow

Mon 19/10

7:50 p.m.-9:33 p.m.

2 stops31h 43m

C$ 1,270

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 10/8

9:40 p.m.-11:55 a.m.

Nonstop8h 15m

London Heathrow

Tue 18/8

9:30 a.m.-2:55 p.m.

1 stop11h 25m

C$ 1,276

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 19/5

5:00 a.m.-9:25 p.m.

1 stop10h 25m

London Heathrow

Fri 29/5

11:05 a.m.-2:10 p.m.

Nonstop9h 05m

C$ 1,287

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 3/10

6:05 p.m.-8:30 a.m.

Nonstop8h 25m

London Heathrow

Sat 10/10

7:30 a.m.-2:55 p.m.

1 stop13h 25m

C$ 1,318

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 17/5

10:30 a.m.-10:40 a.m.

1 stop18h 10m

London Heathrow

Sun 24/5

6:30 a.m.-4:51 p.m.

2 stops16h 21m

C$ 1,350

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 20/5

8:45 a.m.-6:30 a.m.

1 stop15h 45m

London Heathrow

Mon 25/5

11:05 a.m.-2:10 p.m.

Nonstop9h 05m

C$ 1,373

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/4

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 87 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$ 872). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of C$ 1,765). 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 1 May 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 1 May 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
7,937 reviews
Check prices

Comfort

6.8

Food

6.4

Boarding

6.9

Crew

7.7

Overall

6.7

Entertainment

6.4

Reviews

1 / 20
10.0
Excellent

Viorica,Mar 2026

PHX - LHR

The food lately is just from poor to very poor. I bealeave that you can serve less quantities for more quality food. Exemple : at breakfast : omlete and vegetarian omlete ....I beleave with less work less personel could be provide some hummus and carrots and some boiled egss plus whatever snacks or drinks you wish....... Thank you in advance
British Airways
6.7
Okay
7,937 reviews
British Airways
6.7
Okay
7,937 reviews
Check prices

Comfort

6.8

Food

6.4

Boarding

6.9

Crew

7.7

Overall

6.7

Entertainment

6.4

Reviews

1 / 20
10.0
Excellent

Viorica,Mar 2026

PHX - LHR

The food lately is just from poor to very poor. I bealeave that you can serve less quantities for more quality food. Exemple : at breakfast : omlete and vegetarian omlete ....I beleave with less work less personel could be provide some hummus and carrots and some boiled egss plus whatever snacks or drinks you wish....... Thank you in advance

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$ 1,206, United Airlines can have you in London Heathrow Airport from Chicago O'Hare Intl Airport in 8h 15m. The distance from Chicago O'Hare Intl Airport to London Heathrow Airport is about 6339 km. All flights are typically direct.

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

    Currently priced at C$ 630, 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 41% 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 (89%), Austrian Airlines (89%) and United Airlines (89%).

  • 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$ 526, our data indicates the cheapest price to be C$ 517. The most popular route (Chicago O'Hare Intl - London Heathrow), is priced around C$ 1,272.

  • 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$ 872). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of C$ 1,765). 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
Slough
Marlow
Cobham
Leamington Spa
Watford
Luton
High Wycombe
Stratford-upon-Avon
Hounslow
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 1 May 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapestC$ 630AverageC$ 710FlexibilityNo 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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