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Cheap flights from Chicago O'Hare Intl Airport to London Heathrow Airport from £295

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
29 Apr — 6 May1
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 2 days in advance, depart on a Sunday or Monday 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 30 March 2026.

Sat 25/418:05
ORD
-
LHR
1 stop34h 15m
TAP AIR PORTUGAL
Sat 9/506:00
LHR
-
ORD
1 stop16h 05m
TAP AIR PORTUGAL
Deal found 26/3£479
Wed 15/418:00
ORD
-
LHR
1 stop17h 45m
TAP AIR PORTUGAL
Wed 22/406:00
LHR
-
ORD
1 stop16h 00m
TAP AIR PORTUGAL
Deal found 27/3£483
Sun 19/418:00
ORD
-
LHR
1 stop17h 45m
TAP AIR PORTUGAL
Thu 30/413:45
LHR
-
ORD
1 stop32h 15m
TAP AIR PORTUGAL
Deal found 29/3£485
Sun 12/418:00
ORD
-
LHR
1 stop22h 00m
TAP AIR PORTUGAL
Thu 23/419:50
LHR
-
ORD
1 stop26h 10m
TAP AIR PORTUGAL
Deal found 28/3£486
Sun 12/418:00
ORD
-
LHR
1 stop22h 00m
TAP AIR PORTUGAL
Sun 26/408:00
LHR
-
ORD
1 stop14h 00m
TAP AIR PORTUGAL
Deal found 29/3£486
Sun 19/418:00
ORD
-
LHR
1 stop22h 00m
TAP AIR PORTUGAL
Sat 2/506:00
LHR
-
ORD
1 stop16h 05m
TAP AIR PORTUGAL
Deal found 26/3£487
Wed 22/418:00
ORD
-
LHR
1 stop17h 45m
TAP AIR PORTUGAL
Thu 30/411:20
LHR
-
ORD
1 stop34h 40m
TAP AIR PORTUGAL
Deal found 27/3£492
Sun 19/418:00
ORD
-
LHR
1 stop22h 00m
TAP AIR PORTUGAL
Tue 5/513:45
LHR
-
ORD
1 stop32h 15m
TAP AIR PORTUGAL
Deal found 26/3£492
Tue 3/1118:30
ORD
-
LHR
1 stop19h 00m
Icelandair
Thu 12/1112:15
LHR
-
ORD
1 stop11h 05m
Icelandair
Deal found 25/3£495
Fri 24/418:00
ORD
-
LHR
1 stop12h 45m
TAP AIR PORTUGAL
Wed 29/406:00
LHR
-
ORD
1 stop16h 00m
TAP AIR PORTUGAL
Deal found 28/3£503
Sun 22/1119:20
ORD
-
LHR
1 stop17h 10m
Scandinavian Airlines
Fri 27/1110:20
LHR
-
ORD
1 stop12h 25m
Scandinavian Airlines
Deal found 27/3£504

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 30 March 2026.

Round-trip from

£479

One-way from

£295

Popular in

June

Cheapest in

January

Average price

£577

Good round-trip deal

£593 or less

Good one-way deal

£307 or less
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 25/4-9/5
  • 2 total stops
  • 50h 20m total
  • Chicago to London
Search Deals
28/7
  • 28/7
  • 2 total stops
  • 21h 50m total
  • Chicago to London
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£121 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£26 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 O'Hare Intl to London Heathrow.
Search Deals
Price to beat on a one-way flight from Chicago O'Hare Intl to London Heathrow.
Search Deals

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 30 March 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 return flight

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 24/4

13:06-13:35

2 stops18h 29m

London Heathrow

Wed 20/5

07:05-16:10

2 stops15h 05m

£636

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 12/4

13:57-07:10

1 stop11h 13m

London Heathrow

Tue 28/4

06:30-14:15

1 stop13h 45m

£642

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 6/5

21:40-11:55

Nonstop8h 15m

London Heathrow

Fri 15/5

06:50-12:00

1 stop11h 10m

£646

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 13/4

16:25-06:45

Nonstop8h 20m

London Heathrow

Tue 21/4

06:50-12:00

1 stop11h 10m

£646
Fastest return journey

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 13/4

17:55-07:40

Nonstop7h 45m

London Heathrow

Thu 30/4

09:45-12:20

Nonstop8h 35m

£668

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 12/5

21:40-11:55

Nonstop8h 15m

London Heathrow

Wed 17/6

06:50-12:00

1 stop11h 10m

£669

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 18/8

16:30-06:45

Nonstop8h 15m

London Heathrow

Mon 31/8

15:30-11:00

1 stop25h 30m

£670

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 13/5

12:30-07:40

2 stops13h 10m

London Heathrow

Sun 17/5

06:30-14:15

1 stop13h 45m

£694

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 17/4

21:30-11:55

Nonstop8h 25m

London Heathrow

Tue 5/5

08:00-10:55

Nonstop8h 55m

£706

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 7/5

21:40-11:55

Nonstop8h 15m

London Heathrow

Sat 16/5

06:55-18:15

1 stop17h 20m

£722

Flights are sorted by cheapest return flights first.

Deals found on 25/3

Showing 1-10 of 23 resultsSorted by cheapest first
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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 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 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 return flight from O'Hare Intl to Heathrow. Price data was last updated on 13 March 2026.

The best time to book flights from Chicago O'Hare Intl Airport to London Heathrow Airport is 2 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 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 £295). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of £669). 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 30 March 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Chicago O'Hare Intl Airport to London Heathrow Airport as you normally would.

How much does it cost for a return flight 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 30 March 2026.
Read through reviews of airlines operating flights from Chicago O'Hare Intl Airport to London Heathrow Airport, such as United Airlines,Aer Lingus, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,514 reviews
Check prices

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Boarding

7.7

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
9,514 reviews
United Airlines
7.4
Good
9,514 reviews
Check prices

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Boarding

7.7

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
1,493 reviews
United Airlines
7.4
Good
9,514 reviews
Check prices

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Boarding

7.7

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
11,525 reviews
United Airlines
7.4
Good
9,514 reviews
Check prices

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Boarding

7.7

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
3,160 reviews
United Airlines
7.4
Good
9,514 reviews
Check prices

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Boarding

7.7

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
7,834 reviews
United Airlines
7.4
Good
9,514 reviews
Check prices

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Boarding

7.7

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 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?

    Departing from Chicago O'Hare Intl Airport to London Heathrow Airport will take you 8h 15m. Chicago O'Hare Intl Airport and London Heathrow Airport are separated by a distance of 3939 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Chicago O'Hare Intl Airport to London Heathrow Airport round-trip?

    Currently priced at £363, Lufthansa will fly you from Chicago O'Hare Intl Airport to London Heathrow Airport and back. In addition to Lufthansa, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and Finnair - these airlines can fly you to your destination from £390 and £419, respectively. Lufthansa is currently priced 38% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Chicago O'Hare Intl Airport to London Heathrow Airport one-way?

    The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as £167. However, be on the lookout for offers from Lufthansa and British Airways, as they are both options that can get you from Chicago O'Hare Intl Airport to London Heathrow Airport for a low price.

  • 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 (80%), Air Canada (77%) and Austrian Airlines (77%).

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

    The cheapest flight price from Chicago O'Hare Intl Airport to London Heathrow Airport is £223. On average you can expect to pay £718. The most popular route, (Chicago O'Hare Intl - London Heathrow), can usually be booked for £461.

  • 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 holiday 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 £295). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of £669). 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
Milton Keynes
Wembley
Croydon
Northampton
Hounslow
Gatwick
Slough
Ilford
Luton
Hayes
Brentford
Colchester
Guildford
Watford
Kingston upon Thames
Romford
Eastbourne
Swindon
Bedford
Chelmsford

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for O'Hare Intl to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to Gatwick flights
O'Hare Intl to Stansted flights
O'Hare Intl to London City flights
Midway to Heathrow flights
O'Hare Intl to Luton flights

Top 7 airlines flying from O'Hare Intl to Heathrow

Discover the top 7 airlines 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 858,174 searches. Data last updated 30 March 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£363Average£521FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
American AirlinesCheapest£390Average£601FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
FinnairCheapest£419Average£570FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest£428Average£607FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£455Average£588FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
United AirlinesCheapest£468Average£672FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IberiaCheapest£504Average£608FlexibilityNo 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 O'Hare Intl to Heathrow?

Cheapflights helps you search for flights from O'Hare Intl to Heathrow via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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?

Users can book flights with no change fees policies with our dedicated filters. Book flights from O'Hare Intl to Heathrow flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from O'Hare Intl to Heathrow become cheaper?

Of course! You can now track prices for flights from O'Hare Intl to Heathrow and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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