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Cheap flights from Chicago O'Hare Intl Airport to London Heathrow Airport from C$ 502

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 19/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LHR
28 feb. — 7 mar.1
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 April, booked 33 days in advance, depart on a Monday or Friday and return on a Saturday

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 29 enero 2026.

lun. 23/26:30 p.m.
ORD
-
LHR
1 stop10h 20m
Icelandair
lun. 2/38:35 p.m.
LHR
-
ORD
1 stop26h 45m
Icelandair
Deal found 26/1C$ 711
mar. 10/37:30 p.m.
ORD
-
LHR
1 stop10h 20m
Icelandair
mar. 24/38:35 p.m.
LHR
-
ORD
1 stop26h 45m
Icelandair
Deal found 28/1C$ 714
lun. 9/37:30 p.m.
ORD
-
LHR
1 stop10h 20m
Icelandair
jue. 16/41:05 p.m.
LHR
-
ORD
1 stop11h 10m
Icelandair
Deal found 28/1C$ 734
lun. 9/37:30 p.m.
ORD
-
LHR
1 stop19h 00m
Icelandair
lun. 13/49:25 p.m.
LHR
-
ORD
1 stop26h 50m
Icelandair
Deal found 28/1C$ 737
mié. 30/97:25 p.m.
ORD
-
LHR
1 stop10h 30m
Icelandair
lun. 5/109:25 p.m.
LHR
-
ORD
1 stop26h 50m
Icelandair
Deal found 28/1C$ 739
mar. 29/97:25 p.m.
ORD
-
LHR
1 stop10h 30m
Icelandair
mar. 6/101:05 p.m.
LHR
-
ORD
1 stop11h 10m
Icelandair
Deal found 28/1C$ 747
sáb. 26/97:25 p.m.
ORD
-
LHR
1 stop10h 30m
Icelandair
jue. 1/109:25 p.m.
LHR
-
ORD
1 stop26h 50m
Icelandair
Deal found 28/1C$ 749
mar. 22/97:25 p.m.
ORD
-
LHR
1 stop10h 30m
Icelandair
mar. 29/91:05 p.m.
LHR
-
ORD
1 stop11h 10m
Icelandair
Deal found 28/1C$ 756
lun. 21/97:25 p.m.
ORD
-
LHR
1 stop10h 30m
Icelandair
sáb. 26/99:25 p.m.
LHR
-
ORD
1 stop26h 50m
Icelandair
Deal found 28/1C$ 759
dom. 10/56:00 p.m.
ORD
-
LHR
1 stop12h 45m
TAP AIR PORTUGAL
mié. 10/66:00 a.m.
LHR
-
ORD
1 stop16h 00m
TAP AIR PORTUGAL
Deal found 27/1C$ 766
dom. 8/38:20 p.m.
ORD
-
LHR
2 stops42h 35m
Scandinavian Airlines
mié. 11/310:20 a.m.
LHR
-
ORD
1 stop12h 25m
Scandinavian Airlines
Deal found 28/1C$ 789

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 29 enero 2026.

Round-trip from

C$ 711

One-way from

C$ 502

Popular in

June

Cheapest in

January

Average price

C$ 885
Icelandair
  • Icelandair
  • 27/2-8/3
  • 2 total stops
  • 37h 05m total
  • Chicago to London
Search Deals
SWISS
  • SWISS
  • 19/4
  • 1 total stop
  • 15h 00m total
  • Chicago to London
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (C$ 397 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 81 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 29 enero 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

O'Hare Intl

Fly to

Heathrow

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

dom. 8/3

8:20 p.m.-7:55 p.m.

2 stops42h 35m

London Heathrow

mié. 11/3

10:20 a.m.-5:45 p.m.

1 stop12h 25m

C$ 789

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

mié. 11/2

5:50 p.m.-7:55 a.m.

Nonstop8h 05m

London Heathrow

mar. 17/2

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

1 stop17h 50m

C$ 848

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

lun. 2/3

12:45 p.m.-6:20 a.m.

1 stop11h 35m

London Heathrow

mar. 10/3

6:50 a.m.-1:10 p.m.

1 stop11h 20m

C$ 851

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

jue. 19/2

7:20 p.m.-5:40 p.m.

1 stop16h 20m

London Heathrow

vie. 27/2

10:20 a.m.-4:45 p.m.

1 stop12h 25m

C$ 863

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

mié. 1/4

9:20 p.m.-11:45 a.m.

Nonstop8h 25m

London Heathrow

mar. 21/4

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

1 stop12h 35m

C$ 867

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

mié. 11/3

4:45 p.m.-5:55 a.m.

Nonstop8h 10m

London Heathrow

lun. 13/4

8:40 a.m.-12:35 p.m.

1 stop33h 55m

C$ 872

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

mar. 24/2

5:10 p.m.-6:55 a.m.

Nonstop7h 45m

London Heathrow

vie. 6/3

3:45 p.m.-6:45 p.m.

Nonstop9h 00m

C$ 888

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

lun. 23/2

5:50 p.m.-7:55 a.m.

Nonstop8h 05m

London Heathrow

mar. 3/3

10:25 a.m.-1:45 p.m.

Nonstop9h 20m

C$ 888

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

dom. 15/2

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

Nonstop7h 45m

London Heathrow

mar. 24/2

12:35 p.m.-3:25 p.m.

Nonstop8h 50m

C$ 893

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

mar. 31/3

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

Nonstop7h 50m

London Heathrow

mar. 14/4

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

Nonstop8h 45m

C$ 910

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/1

Showing 1-10 of 23 results
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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?

Use this chart to determine the optimal time to book a round-trip flight from O'Hare Intl to Heathrow. Price data was last updated on 23 January 2026.

Booking 33 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, May is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport (average of C$ 536). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of C$ 1,212). 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 29 enero 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.

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 29 enero 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
7,705 reviews
Check prices

Food

6.4

Boarding

6.9

Comfort

6.8

Crew

7.6

Entertainment

6.4

Overall

6.7

Reviews

1 / 20
8.0
Excellent

Lakshmi,Dec 2025

SFO - LHR

I had a great time on the flight with good entertainment and food. The staff was awesome. The only thing was there was a delay in boarding and takeoff from London. However, I was pleasantly surprised when the airline sent an apology for the few later landing in Mumbai. They did not have WiFi on board on the leg from London to Mumbai but that was okay for me. On the first leg from SF to London, a couple of seats ahead of me had issues with their display so they could not watch anything on their screens although the stewardess gas be them an option to use the WiFi on their devices. This did not affect me, however, so that was cool. I would recommend British Airways. This was my first time flying with them and I had a lovely flight.
British Airways
6.7
Okay
7,705 reviews
British Airways
6.7
Okay
7,705 reviews
Check prices

Food

6.4

Boarding

6.9

Comfort

6.8

Crew

7.6

Entertainment

6.4

Overall

6.7

Reviews

1 / 20
8.0
Excellent

Lakshmi,Dec 2025

SFO - LHR

I had a great time on the flight with good entertainment and food. The staff was awesome. The only thing was there was a delay in boarding and takeoff from London. However, I was pleasantly surprised when the airline sent an apology for the few later landing in Mumbai. They did not have WiFi on board on the leg from London to Mumbai but that was okay for me. On the first leg from SF to London, a couple of seats ahead of me had issues with their display so they could not watch anything on their screens although the stewardess gas be them an option to use the WiFi on their devices. This did not affect me, however, so that was cool. I would recommend British Airways. This was my first time flying with them and I had a lovely flight.

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$ 848, 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. 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$ 655, 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 38% 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 Aer Lingus (73%), American Airlines (66%) and Alaska Airlines (66%).

  • 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, May is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport (average of C$ 536). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of C$ 1,212). 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
Sutton
Twickenham
Gatwick
Slough
Marlow
Cobham
Milton Keynes
Leamington Spa
Romford
Bedford
Watford
Luton
High Wycombe
Stratford-upon-Avon
Hounslow

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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 29 enero 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapestC$ 655AverageC$ 745FlexibilityNo 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?

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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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