Which airport typically offers the quickest stopover for flights from Chicago O'Hare Intl Airport to London Heathrow Airport?

Flights via Helsinki (HEL) offer the fastest connection on this route, with an average stopover time of 1h 28m.

What’s the top stopover airport for flights from Chicago O'Hare Intl Airport to London Heathrow Airport?

Reykjavik (KEF) – chosen by Cheapflights users on 31% of one-stop itineraries from Chicago O'Hare Intl Airport to London Heathrow Airport on Cheapflights.

What’s the cheapest stopover airport for flights from Chicago O'Hare Intl Airport to London Heathrow Airport?

New York (JFK) is the most affordable one-stop option, with an average return flight price of £461.

What’s the fastest stopover option from Chicago O'Hare Intl Airport to London Heathrow Airport?

Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 10h 10m.

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

Currently priced at £355, 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 Finnair and Iberia - these airlines can fly you to your destination from £410 and £442, respectively. Lufthansa is currently priced 39% below the average price you’ll pay for this route.

What is the cheapest day to fly from Chicago O'Hare Intl Airport to London Heathrow Airport?

Travellers seeking maximum savings on their Chicago O'Hare Intl Airport to London Heathrow Airport flight should consider departing on Monday mornings when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Chicago O'Hare Intl Airport to London Heathrow Airport

The most flights from ORD to LHR are scheduled on a Tuesday (57 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (52 on average).

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.

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).

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 £257. On average you can expect to pay £404. The most popular route, (Chicago O'Hare Intl - London Heathrow), can usually be booked for £312.

What are the most popular airlines that fly from Chicago O'Hare Intl Airport to London Heathrow Airport?

The most popular airlines flying from Chicago O'Hare Intl Airport to London Heathrow Airport are American Airlines, Finnair and British Airways. Something to consider prior to booking your flight.

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

Friday flights are generally found to be more expensive for flights from Chicago O'Hare Intl Airport to London Heathrow Airport. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London Heathrow Airport.

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

Our data shows that February tends to be the cheapest month to fly to London Heathrow Airport from Chicago O'Hare Intl Airport. Users have commonly found prices around £562 for the month, but tickets can be as low as £342. Due to multiple factors, prepare for potentially higher prices in June.

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.

£171+ Cheap Flights from Chicago O'Hare Intl Airport to London Heathrow Airport

Q: How much does it cost for a return flight from Chicago O'Hare Intl Airport to London Heathrow Airport?

Airfare is below average for this route at the moment. Chicago O'Hare Intl Airport to London Heathrow Airport flights typically cost between £476 and £656 in October. The cheapest return flight price found within the last 3 days was £373 on Multiple Airlines (19 Oct-4 Nov).

Cheapflights Tip: The best prices from Chicago O'Hare Intl to London Heathrow are usually found in February or April, booked 28 days in advance, depart on a Thursday or Sunday and return on a Wednesday

Cheap flight deals from O'Hare Intl to Heathrow

Round-trip from	£373
One-way from	£171
Popular in	June
Cheapest in	February
Average price	£534
Good round-trip deal	£361 or less
Good one-way deal	£276 or less

19/10-4/11
3 total stops
29h 29m total
Chicago to London

Search Deals

TAP AIR PORTUGAL
12/11
1 total stop
14h 20m total
Chicago to London

Search Deals

Highest demand for flights based on searches. 20% potential increase in price (£109 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (£23 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2025

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

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 12 September 2025.

Sun 19/1010:40ORD - LHR

1 stop13h 50mMultiple Airlines

Tue 4/1109:00LHR - ORD

2 stops15h 39mMultiple Airlines

Deal found 10/9£373

Wed 24/921:50ORD - LHR

Nonstop7h 55mUnited Airlines

Tue 14/1006:50LHR - ORD

1 stop11h 15mUnited Airlines

Deal found 10/9£374

Tue 30/921:25ORD - LHR

Nonstop8h 20mUnited Airlines

Tue 7/1006:50LHR - ORD

1 stop11h 15mUnited Airlines

Deal found 11/9£374

Tue 14/1015:50ORD - LHR

1 stop10h 45mMultiple Airlines

Mon 20/1019:30LHR - ORD

1 stop23h 50mMultiple Airlines

Deal found 10/9£375

Thu 18/921:31ORD - LHR

1 stop27h 24mUnited Airlines

Sun 21/906:50LHR - ORD

1 stop11h 15mUnited Airlines

Deal found 10/9£376

Sun 14/922:15ORD - LHR

1 stop31h 40mIcelandair

Tue 30/921:25LHR - ORD

1 stop29h 50mIcelandair

Deal found 10/9£377

Wed 24/913:12ORD - LHR

1 stop10h 43mUnited Airlines

Tue 7/1006:50LHR - ORD

1 stop11h 15mUnited Airlines

Deal found 11/9£377

Wed 5/1110:00ORD - LHR

2 stops15h 10mMultiple Airlines

Tue 11/1109:00LHR - ORD

2 stops15h 39mMultiple Airlines

Deal found 10/9£378

Wed 12/1110:00ORD - LHR

2 stops15h 10mMultiple Airlines

Wed 19/1106:50LHR - ORD

2 stops14h 05mMultiple Airlines

Deal found 10/9£379

Tue 30/910:40ORD - LHR

1 stop13h 45mDelta

Wed 19/1109:00LHR - ORD

1 stop12h 10mDelta

Deal found 11/9£379

Wed 24/913:00ORD - LHR

1 stop11h 25mDelta

Fri 3/1006:30LHR - ORD

1 stop13h 40mDelta

Deal found 11/9£380

Sun 21/918:00ORD - LHR

Nonstop8h 20mMultiple Airlines

Tue 30/914:05LHR - ORD

1 stop23h 56mMultiple Airlines

Deal found 11/9£381

Best flights from O'Hare Intl to Heathrow
Discover carefully curated flight deals from O'Hare Intl to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 12 September 2025.

Mon 1/1221:05ORD - LHR

Nonstop8h 10mUnited Airlines

Tue 9/1206:50LHR - ORD

1 stop11h 20mUnited Airlines

Deal found 10/9£374

Tue 30/919:10ORD - LHR

Nonstop7h 55mBritish Airways

Fri 14/1115:45LHR - ORD

Nonstop9h 00mBritish Airways

Deal found 11/9£382

Wed 12/1117:50ORD - LHR

Nonstop8h 05mUnited Airlines

Wed 19/1106:50LHR - ORD

1 stop11h 20mUnited Airlines

Deal found 10/9£374

Tue 2/1221:45ORD - LHR

Nonstop7h 50mBritish Airways

Wed 10/1211:00LHR - ORD

Nonstop8h 50mBritish Airways

Deal found 11/9£382

Sun 28/916:00ORD - LHR

Nonstop8h 20mUnited Airlines

Tue 7/1006:50LHR - ORD

1 stop11h 15mUnited Airlines

Deal found 11/9£374

Mon 29/916:00ORD - LHR

Nonstop8h 20mUnited Airlines

Tue 7/1006:50LHR - ORD

1 stop11h 15mUnited Airlines

Deal found 11/9£374

Sat 1/1120:18ORD - LHR

1 stop32h 22mUnited Airlines

Mon 10/1112:05LHR - ORD

1 stop34h 15mUnited Airlines

Deal found 10/9£379

Wed 24/910:40ORD - LHR

1 stop13h 50mUnited Airlines

Tue 30/914:05LHR - ORD

1 stop30h 50mUnited Airlines

Deal found 11/9£382

Tue 18/1117:50ORD - LHR

Nonstop8h 05mUnited Airlines

Tue 2/1211:05LHR - ORD

1 stop31h 05mUnited Airlines

Deal found 11/9£384

Mon 29/910:50ORD - LHR

1 stop13h 40mUnited Airlines

Mon 6/1017:50LHR - ORD

1 stop24h 15mUnited Airlines

Deal found 11/9£384

Wed 24/913:12ORD - LHR

1 stop10h 43mUnited Airlines

Thu 2/1011:05LHR - ORD

Nonstop9h 05mUnited Airlines

Deal found 11/9£385

Direct flights from O'Hare Intl to Heathrow
Explore direct flight options from O'Hare Intl to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 12 September 2025.

Mon 22/916:55ORD - LHR

Nonstop7h 55mBritish Airways

Tue 21/1009:15LHR - ORD

Nonstop8h 35mBritish Airways

Deal found 11/9£378

Wed 21/121:45ORD - LHR

Nonstop7h 50mFinnair

Tue 27/111:00LHR - ORD

Nonstop8h 50mFinnair

Deal found 10/9£379

Wed 29/1021:45ORD - LHR

Nonstop7h 40mFinnair

Wed 5/1112:35LHR - ORD

Nonstop8h 50mFinnair

Deal found 10/9£379

Mon 27/1018:10ORD - LHR

Nonstop7h 45mBritish Airways

Wed 12/1111:00LHR - ORD

Nonstop8h 50mBritish Airways

Deal found 10/9£381

Wed 24/921:50ORD - LHR

Nonstop7h 55mUnited Airlines

Tue 30/908:30LHR - ORD

Nonstop9h 00mUnited Airlines

Deal found 11/9£382

Fri 3/1016:00ORD - LHR

Nonstop8h 20mLufthansa

Tue 7/1014:10LHR - ORD

Nonstop9h 10mLufthansa

Deal found 11/9£388

Thu 16/1016:00ORD - LHR

Nonstop8h 20mLufthansa

Wed 22/1008:30LHR - ORD

Nonstop9h 00mLufthansa

Deal found 10/9£389

Mon 29/921:25ORD - LHR

Nonstop8h 20mLufthansa

Tue 7/1014:10LHR - ORD

Nonstop9h 10mLufthansa

Deal found 11/9£390

Sun 1/317:10ORD - LHR

Nonstop7h 45mBritish Airways

Wed 6/509:15LHR - ORD

Nonstop8h 40mBritish Airways

Deal found 10/9£393

Tue 30/1221:45ORD - LHR

Nonstop7h 50mBritish Airways

Tue 12/515:30LHR - ORD

Nonstop8h 45mBritish Airways

Deal found 10/9£394

Sun 28/922:35ORD - LHR

Nonstop7h 40mIberia

Tue 21/1009:15LHR - ORD

Nonstop8h 35mIberia

Deal found 11/9£397

Last-minute flights from O'Hare Intl to Heathrow
Discover last-minute flight deals from O'Hare Intl to Heathrow. Data last updated 12 September 2025 and is based on user searches.

Sun 14/922:15ORD - LHR

1 stop31h 40mIcelandair

Tue 30/921:25LHR - ORD

1 stop29h 50mIcelandair

Deal found 10/9£377

Thu 18/921:31ORD - LHR

1 stop27h 24mUnited Airlines

Sun 21/906:50LHR - ORD

1 stop11h 15mUnited Airlines

Deal found 10/9£376

Sun 21/921:50ORD - LHR

Nonstop7h 55mUnited Airlines

Tue 30/908:30LHR - ORD

Nonstop9h 00mUnited Airlines

Deal found 11/9£381

Mon 22/916:55ORD - LHR

Nonstop7h 55mBritish Airways

Tue 21/1009:15LHR - ORD

Nonstop8h 35mBritish Airways

Deal found 11/9£378

Wed 24/921:50ORD - LHR

Nonstop7h 55mUnited Airlines

Tue 14/1006:50LHR - ORD

1 stop11h 15mUnited Airlines

Deal found 10/9£374

Wed 24/913:12ORD - LHR

1 stop10h 43mUnited Airlines

Tue 7/1006:50LHR - ORD

1 stop11h 15mUnited Airlines

Deal found 11/9£377

Wed 24/913:00ORD - LHR

1 stop11h 25mDelta

Fri 3/1006:30LHR - ORD

1 stop13h 40mDelta

Deal found 11/9£380

Tue 30/921:25ORD - LHR

Nonstop8h 20mUnited Airlines

Tue 7/1006:50LHR - ORD

1 stop11h 15mUnited Airlines

Deal found 11/9£374

Tue 30/910:40ORD - LHR

1 stop13h 45mDelta

Wed 19/1109:00LHR - ORD

1 stop12h 10mDelta

Deal found 11/9£379

Tue 14/1015:50ORD - LHR

1 stop10h 45mMultiple Airlines

Mon 20/1019:30LHR - ORD

1 stop23h 50mMultiple Airlines

Deal found 10/9£375

Sun 19/1010:40ORD - LHR

1 stop13h 50mMultiple Airlines

Tue 4/1109:00LHR - ORD

2 stops15h 39mMultiple Airlines

Deal found 10/9£373

Wed 22/1018:00ORD - LHR

Nonstop8h 20mUnited Airlines

Mon 27/1016:40LHR - ORD

1 stop27h 30mUnited Airlines

Deal found 11/9£379

One-way flights from O'Hare Intl to Heathrow
Search for one-way flight options from O'Hare Intl to Heathrow. Find affordable one-way fares based on user searches. Data last updated 12 September 2025.

Wed 12/1119:10ORD - LHR

1 stop14h 20mTAP AIR PORTUGAL

Deal found 11/9£171

Fri 14/1120:15ORD - LHR

1 stop34h 25mTAP AIR PORTUGAL

Deal found 11/9£172

Sun 12/1017:30ORD - LHR

1 stop36h 35mWestJet

Deal found 11/9£174

Mon 17/1106:40ORD - LHR

2 stops32h 55mMultiple Airlines

Deal found 11/9£175

Mon 20/1010:27ORD - LHR

2 stops26h 23mMultiple Airlines

Deal found 10/9£176

Sun 2/1110:27ORD - LHR

2 stops30h 13mMultiple Airlines

Deal found 11/9£176

Fri 7/1120:15ORD - LHR

1 stop15h 15mTAP AIR PORTUGAL

Deal found 9/9£177

Mon 1/1214:20ORD - LHR

1 stop16h 30mWestJet

Deal found 10/9£178

Tue 14/1018:58ORD - LHR

3 stops38h 37mMultiple Airlines

Deal found 10/9£179

Wed 22/1006:40ORD - LHR

2 stops26h 55mMultiple Airlines

Deal found 11/9£179

Fri 3/1010:27ORD - LHR

2 stops25h 18mMultiple Airlines

Deal found 10/9£180

Mon 10/1106:40ORD - LHR

2 stops24h 00mMultiple Airlines

Deal found 11/9£181

Cheapflights Fare Finder

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

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 1/12

21:05-11:15

Nonstop8h 10m

London Heathrow

Tue 9/12

06:50-12:10

1 stop11h 20m

£374

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 12/11

17:50-07:55

Nonstop8h 05m

London Heathrow

Wed 19/11

06:50-12:10

1 stop11h 20m

£374

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 28/9

16:00-06:20

Nonstop8h 20m

London Heathrow

Tue 7/10

06:50-12:05

1 stop11h 15m

£374

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 29/9

16:00-06:20

Nonstop8h 20m

London Heathrow

Tue 7/10

06:50-12:05

1 stop11h 15m

£374

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 1/11

20:18-09:40

1 stop32h 22m

London Heathrow

Mon 10/11

12:05-16:20

1 stop34h 15m

£379

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 30/9

19:10-09:05

Nonstop7h 55m

London Heathrow

Fri 14/11

15:45-18:45

Nonstop9h 00m

£382

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 2/12

21:45-11:35

Nonstop7h 50m

London Heathrow

Wed 10/12

11:00-13:50

Nonstop8h 50m

£382

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 24/9

10:40-06:30

1 stop13h 50m

London Heathrow

Tue 30/9

14:05-14:55

1 stop30h 50m

£382

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 18/11

17:50-07:55

Nonstop8h 05m

London Heathrow

Tue 2/12

11:05-12:10

1 stop31h 05m

£384

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 29/9

10:50-06:30

1 stop13h 40m

London Heathrow

Mon 6/10

17:50-12:05

1 stop24h 15m

£384

Flights are sorted by cheapest return flights first.

Deals found on 11/9

Showing 1-10 of 23 results

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

Prices

Airlines

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

The best time to book flights from Chicago O'Hare Intl Airport to London Heathrow Airport is 28 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?

Unlike at midday, when flights are generally more expensive, you can save up to 33% on flights from Chicago O'Hare Intl Airport to London Heathrow Airport by exploring options for tickets in the morning.

How much does it cost for a return flight from Chicago O'Hare Intl Airport to London Heathrow Airport?

Reviews of airlines servicing Heathrow

Read through reviews of airlines operating flights from Chicago O'Hare Intl Airport to London Heathrow Airport, such as Finnair, United Airlines, andIberia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Finnair

7.6

Good

1,323 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

United Airlines

7.4

Good

8,937 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Iberia

7.0

Good

2,929 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Lufthansa

6.8

Okay

7,409 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

British Airways

6.7

Okay

7,361 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Related info for your journey

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 10m. Chicago O'Hare Intl Airport and London Heathrow Airport are separated by a distance of 3939 mi. All flights are typically direct.
What are the cheapest airlines flying from Chicago O'Hare Intl Airport to London Heathrow Airport round-trip?
Currently priced at £355, 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 Finnair and Iberia - these airlines can fly you to your destination from £410 and £442, respectively. Lufthansa is currently priced 39% below the average price you’ll pay for this route.
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 (64%), American Airlines (62%) and Air Canada (62%).
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 £257. On average you can expect to pay £404. The most popular route, (Chicago O'Hare Intl - London Heathrow), can usually be booked for £312.
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

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Gatwick

Slough

Northampton

Luton

Deal

Wembley

Ilford

Crawley

Hayes

Watford

Folkestone

Winchester

Chichester

Ipswich

Swindon

Dartford

Eastbourne

Browse thousands of different options on Cheapflights for your next trip

Top 7 airlines flying from O'Hare Intl to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
Lufthansa	Cheapest£355	Average£545	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Finnair	Cheapest£410	Average£645	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Iberia	Cheapest£442	Average£539	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
Aer Lingus	Cheapest£445	Average£576	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
British Airways	Cheapest£455	Average£602	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
United Airlines	Cheapest£458	Average£689	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
American Airlines	Cheapest£495	Average£623	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights

Fly with Cheapflights

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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Cheap flights from Chicago O'Hare Intl Airport to London Heathrow Airport from £171

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 12/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Chicago O'Hare Intl to London Heathrow are usually found in February or April, booked 28 days in advance, depart on a Thursday or Sunday and return on a Wednesday

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Find flight deals from O'Hare Intl to Heathrow

Cheapest flights from O'Hare Intl to HeathrowExplore 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 12 September 2025.

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 12 September 2025.

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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.

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?

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

What is the cheapest time of day to fly from ORD to LHR?

How much does it cost for a return flight from Chicago O'Hare Intl Airport to London Heathrow Airport?

Weekly flight availability from Chicago O'Hare Intl Airport to London Heathrow Airport

What’s the top stopover airport for flights from Chicago O'Hare Intl Airport to London Heathrow Airport?

What’s the fastest stopover option from Chicago O'Hare Intl Airport to London Heathrow Airport?

What’s the fastest stopover option from Chicago O'Hare Intl Airport to London Heathrow Airport?

Which airport typically offers the quickest stopover for flights from Chicago O'Hare Intl Airport to London Heathrow Airport?

Reviews of airlines servicing Heathrow

Read through reviews of airlines operating flights from Chicago O'Hare Intl Airport to London Heathrow Airport, such as Finnair, United Airlines, andIberia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

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?

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

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

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

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

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

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

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

Travelling to a place near London Heathrow Airport?

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Alternative routes for O'Hare Intl to Heathrow

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Top 7 airlines flying from O'Hare Intl to Heathrow

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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 12 September 2025.