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Cheap flights from Chicago O'Hare Intl Airport to London Heathrow Airport from £203

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 4/5. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LHR
30 Mar — 6 Apr1
1 adult

Cheapflights Tip: The best prices from Chicago O'Hare Intl to London Heathrow are usually found in October or February, booked 19 days in advance, depart on a Wednesday or Thursday and return on a Tuesday

Cheap 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 25 March 2025.

Round-trip from

£455

One-way from

£203

Popular in

June

Cheapest in

October

Average price

£558

Good round-trip deal

£532 or less

Good one-way deal

£316 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 5/5-12/5
  • 3 total stops
  • 32h 20m total
  • Chicago to London
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Icelandair
  • Icelandair
  • 4/5
  • 1 total stop
  • 31h 40m total
  • Chicago to London
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Highest demand for flights based on searches. 18% potential increase in price (£110 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£17 potential savings vs. average return price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from Chicago O'Hare Intl to London Heathrow.
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Price to beat on a one-way flight from Chicago O'Hare Intl to London Heathrow.
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Find flight deals from O'Hare Intl to Heathrow

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 25 March 2025.

Mon 5/519:15ORD - LHR
1 stop17h 15mScandinavian Airlines
Mon 12/507:05LHR - ORD
2 stops15h 05mScandinavian Airlines
Deal found 24/3£455
Sun 4/517:45ORD - LHR
Nonstop7h 35mIberia
Fri 16/514:25LHR - ORD
Nonstop8h 35mIberia
Deal found 24/3£455
Sat 11/1019:25ORD - LHR
1 stop10h 30mIcelandair
Sat 25/1021:25LHR - ORD
1 stop29h 50mIcelandair
Deal found 24/3£456
Wed 8/1018:00ORD - LHR
1 stop22h 00mTAP AIR PORTUGAL
Wed 22/1018:45LHR - ORD
1 stop23h 50mTAP AIR PORTUGAL
Deal found 24/3£458
Tue 22/416:00ORD - LHR
1 stop13h 50mAir Canada
Sun 27/417:40LHR - ORD
1 stop21h 15mAir Canada
Deal found 24/3£459
Mon 7/411:30ORD - LHR
1 stop16h 30mMultiple Airlines
Tue 15/406:00LHR - ORD
1 stop12h 10mMultiple Airlines
Deal found 24/3£462
Sun 4/517:45ORD - LHR
Nonstop7h 35mFinnair
Thu 15/509:30LHR - ORD
1 stop14h 20mFinnair
Deal found 24/3£464
Tue 8/420:50ORD - LHR
1 stop10h 35mAer Lingus
Tue 15/412:00LHR - ORD
1 stop13h 00mAer Lingus
Deal found 24/3£467
Wed 30/416:05ORD - LHR
Nonstop8h 15mUnited Airlines
Mon 5/513:45LHR - ORD
1 stop28h 25mUnited Airlines
Deal found 24/3£480
Thu 1/508:50ORD - LHR
1 stop15h 40mJetBlue
Tue 6/508:15LHR - ORD
1 stop12h 49mJetBlue
Deal found 23/3£498
Wed 23/417:34ORD - LHR
1 stop13h 56mDelta
Thu 1/506:15LHR - ORD
2 stops15h 53mDelta
Deal found 24/3£499
Mon 7/421:15ORD - LHR
Nonstop7h 45mBritish Airways
Tue 7/1011:05LHR - ORD
Nonstop8h 45mBritish Airways
Deal found 24/3£516

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 25 March 2025.
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

Mon 5/5

19:15-18:30

1 stop17h 15m

London Heathrow

Mon 12/5

07:05-16:10

2 stops15h 05m

£455

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 4/5

17:45-07:20

Nonstop7h 35m

London Heathrow

Wed 14/5

12:15-14:40

Nonstop8h 25m

£455

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 23/4

15:45-08:00

1 stop10h 15m

London Heathrow

Wed 7/5

13:25-19:00

1 stop11h 35m

£458

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 22/4

16:00-11:50

1 stop13h 50m

London Heathrow

Sun 27/4

17:40-08:55

1 stop21h 15m

£459

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 25/4

22:15-20:20

1 stop16h 05m

London Heathrow

Tue 29/4

21:25-18:15

1 stop26h 50m

£461

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 7/4

11:30-10:00

1 stop16h 30m

London Heathrow

Tue 15/4

06:00-12:10

1 stop12h 10m

£462

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 22/4

22:20-12:15

Nonstop7h 55m

London Heathrow

Wed 30/4

10:20-17:50

1 stop13h 30m

£464

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 30/4

18:05-08:20

Nonstop8h 15m

London Heathrow

Mon 19/5

12:10-15:55

1 stop33h 45m

£480

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 1/5

08:50-06:30

1 stop15h 40m

London Heathrow

Tue 6/5

08:15-15:04

1 stop12h 49m

£498

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 22/4

13:50-08:50

1 stop13h 00m

London Heathrow

Wed 30/4

06:15-16:11

2 stops15h 56m

£499

Flights are sorted by cheapest return flights first.

Deals found on 24/3

Showing 1-10 of 29 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 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 21 March 2025.

The best time to book flights from Chicago O'Hare Intl Airport to London Heathrow Airport is 19 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, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport (average of £112). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in August is currently the most expensive (average of £164). 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 25 March 2025.

Unlike at midday, when flights are generally more expensive, you can save up to 14% on flights from Chicago O'Hare Intl Airport to London Heathrow Airport by exploring options for tickets in the afternoon.

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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 25 March 2025.
See what other customers who have flown with Delta, KLM and Finnair from Chicago to London have to say. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,890 reviews
Check prices

Comfort

8.0

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very Good
7,890 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Comfort

8.0

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,318 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Comfort

8.0

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,266 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Comfort

8.0

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,569 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Comfort

8.0

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air France
7.4
Good
1,423 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Comfort

8.0

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

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

    Currently priced at £455, Scandinavian Airlines will fly you from Chicago O'Hare Intl Airport to London Heathrow Airport and back. In addition to Scandinavian Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Iberia and Aer Lingus - these airlines can fly you to your destination from £455 and £458, respectively. Scandinavian Airlines is currently priced 25% 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 Icelandair, with whom users have recently found tickets for as low as £203. However, be on the lookout for offers from JetBlue and TAP AIR PORTUGAL, 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 Royal Jordanian (87%), Air Canada (80%) and Austrian Airlines (80%).

  • 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 £286. On average you can expect to pay £3,170. The most popular route, (Chicago O'Hare Intl - London Heathrow), can usually be booked for £411.

  • 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, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport (average of £112). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in August is currently the most expensive (average of £164). 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 Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Hounslow
Deal
Milton Keynes
Gatwick
Croydon
Luton
Slough
Eastbourne
Wembley
Northampton
Swindon
Hayes
Ilford
Crawley
Southend-on-Sea
Winchester
Maidstone
Ipswich
Watford
Southall

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 London City flights
Midway to Heathrow flights
O'Hare Intl to Stansted flights
O'Hare Intl to Luton flights

Top 6 airlines flying from O'Hare Intl to Heathrow

Discover the top 6 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 25 March 2025.
AirlineCheapestAverageFlexibilityOn-time
FinnairCheapest£369Average£717FlexibilityNo cancel feeOn-time76%
Search Finnair flights
American AirlinesCheapest£397Average£776FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
IberiaCheapest£463Average£646FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£494Average£674FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£503Average£859FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£515Average£729FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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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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