What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.

What is the most punctual flight time for Chicago to London flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.

Which airline has the best punctuality record on Chicago to London flights?

Over the past year, Royal Jordanian have had the lowest number of delays on this route, with just 19% of flights being delayed.

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?

Dublin (DUB) – chosen by Cheapflights users on 37% 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 £465.

How often are flights from Chicago to London delayed?

About 24% of weekly flights between Chicago and London have experienced delays in the past year, with the average delay time being 177 minutes.

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 12m.

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

Currently priced at £358, 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 £385 and £414, respectively. Lufthansa is currently priced 39% below the average price you’ll pay for this route.

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

The most flights from ORD to LHR are scheduled on a Monday (51 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (51 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 £283. On average you can expect to pay £397. The most popular route, (Chicago O'Hare Intl - London Heathrow), can usually be booked for £310.

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 British Airways, Iberia and Finnair. Something to consider prior to booking your flight.

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.

£175+ 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 £479 and £647 in November. The cheapest return flight price found within the last 3 days was £392 on Icelandair (18 Nov-2 Dec).

Cheapflights Tip: The best prices from Chicago O'Hare Intl to London Heathrow are usually found in February or April, booked 55 days in advance, depart on a Thursday or Sunday and return on a Wednesday

Find 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 17 October 2025.

Tue 18/1118:30ORD - LHR

1 stop19h 00mIcelandair

Tue 2/1220:35LHR - ORD

1 stop26h 45mIcelandair

Deal found 16/10£392

Wed 31/1218:30ORD - LHR

1 stop19h 00mIcelandair

Thu 15/112:15LHR - ORD

1 stop11h 05mIcelandair

Deal found 15/10£393

Mon 3/1119:20ORD - LHR

2 stops39h 40mScandinavian Airlines

Thu 6/1106:40LHR - ORD

1 stop16h 05mScandinavian Airlines

Deal found 16/10£394

Fri 7/1119:20ORD - LHR

2 stops31h 35mScandinavian Airlines

Mon 10/1106:40LHR - ORD

1 stop16h 05mScandinavian Airlines

Deal found 16/10£398

Sun 9/1118:30ORD - LHR

1 stop10h 20mIcelandair

Tue 18/1112:15LHR - ORD

1 stop11h 05mIcelandair

Deal found 15/10£401

Tue 18/1110:35ORD - LHR

2 stops25h 05mScandinavian Airlines

Tue 2/1219:50LHR - ORD

2 stops26h 55mScandinavian Airlines

Deal found 16/10£402

Tue 11/1107:10ORD - LHR

2 stops20h 10mScandinavian Airlines

Mon 17/1106:40LHR - ORD

1 stop16h 05mScandinavian Airlines

Deal found 15/10£403

Fri 7/1119:20ORD - LHR

2 stops15h 05mScandinavian Airlines

Sun 9/1106:40LHR - ORD

2 stops16h 05mScandinavian Airlines

Deal found 16/10£404

Tue 11/1107:10ORD - LHR

2 stops20h 10mScandinavian Airlines

Thu 20/1107:05LHR - ORD

2 stops15h 40mScandinavian Airlines

Deal found 15/10£405

Tue 11/1107:10ORD - LHR

2 stops20h 10mScandinavian Airlines

Tue 25/1119:50LHR - ORD

2 stops26h 55mScandinavian Airlines

Deal found 17/10£406

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 17 October 2025.

Thu 29/110:40ORD - LHR

2 stops23h 20mScandinavian Airlines

Fri 6/206:40LHR - ORD

1 stop16h 05mScandinavian Airlines

Deal found 16/10£395

Wed 29/1013:22ORD - LHR

1 stop14h 13mFinnair

Wed 5/1114:10LHR - ORD

Nonstop8h 50mFinnair

Deal found 16/10£439

Tue 25/1113:14ORD - LHR

1 stop11h 11mDelta

Wed 10/1206:20LHR - ORD

2 stops17h 42mDelta

Deal found 16/10£440

Wed 3/1217:50ORD - LHR

Nonstop8h 05mUnited Airlines

Tue 9/1206:35LHR - ORD

1 stop13h 35mUnited Airlines

Deal found 15/10£450

Thu 26/210:40ORD - LHR

2 stops16h 40mScandinavian Airlines

Mon 2/306:40LHR - ORD

1 stop16h 05mScandinavian Airlines

Deal found 15/10£395

Tue 25/1108:50ORD - LHR

1 stop16h 15mDelta

Wed 3/1206:20LHR - ORD

2 stops17h 42mDelta

Deal found 16/10£440

Tue 18/1110:35ORD - LHR

2 stops25h 05mScandinavian Airlines

Mon 24/1107:05LHR - ORD

2 stops15h 40mScandinavian Airlines

Deal found 16/10£405

Tue 2/1221:05ORD - LHR

Nonstop8h 10mUnited Airlines

Wed 10/1211:10LHR - ORD

1 stop13h 15mUnited Airlines

Deal found 15/10£450

Wed 29/1010:25ORD - LHR

1 stop15h 25mDelta

Tue 4/1106:30LHR - ORD

2 stops16h 20mDelta

Deal found 16/10£442

Thu 26/210:40ORD - LHR

2 stops16h 40mScandinavian Airlines

Sun 1/321:05LHR - ORD

2 stops25h 40mScandinavian Airlines

Deal found 15/10£408

Mon 5/105:50ORD - LHR

1 stop21h 10mDelta

Thu 15/106:20LHR - ORD

2 stops17h 17mDelta

Deal found 16/10£447

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 17 October 2025.

Mon 1/1218:25ORD - LHR

Nonstop7h 50mBritish Airways

Tue 9/1215:45LHR - ORD

Nonstop9h 00mBritish Airways

Deal found 17/10£430

Tue 25/1121:45ORD - LHR

Nonstop7h 50mBritish Airways

Wed 10/1214:10LHR - ORD

Nonstop8h 50mBritish Airways

Deal found 16/10£430

Tue 11/1118:30ORD - LHR

Nonstop7h 45mIberia

Tue 18/1114:10LHR - ORD

Nonstop8h 50mIberia

Deal found 15/10£431

Wed 29/1018:10ORD - LHR

Nonstop7h 45mBritish Airways

Wed 5/1111:00LHR - ORD

Nonstop8h 50mBritish Airways

Deal found 15/10£434

Wed 12/1118:30ORD - LHR

Nonstop7h 45mFinnair

Wed 19/1112:35LHR - ORD

Nonstop8h 50mFinnair

Deal found 16/10£435

Mon 27/1022:45ORD - LHR

Nonstop7h 50mBritish Airways

Fri 7/1111:00LHR - ORD

Nonstop8h 50mBritish Airways

Deal found 15/10£436

Wed 28/121:45ORD - LHR

Nonstop7h 50mBritish Airways

Thu 12/215:45LHR - ORD

Nonstop9h 00mBritish Airways

Deal found 16/10£436

Wed 28/120:45ORD - LHR

Nonstop7h 40mIberia

Fri 6/212:35LHR - ORD

Nonstop8h 50mIberia

Deal found 17/10£437

Tue 28/1021:45ORD - LHR

Nonstop7h 40mAmerican Airlines

Tue 4/1115:45LHR - ORD

Nonstop9h 00mAmerican Airlines

Deal found 16/10£438

Mon 12/120:45ORD - LHR

Nonstop7h 40mAmerican Airlines

Tue 27/115:45LHR - ORD

Nonstop9h 00mAmerican Airlines

Deal found 15/10£442

Mon 12/117:10ORD - LHR

Nonstop7h 45mBritish Airways

Tue 10/315:45LHR - ORD

Nonstop9h 00mBritish Airways

Deal found 16/10£443

Tue 3/321:45ORD - LHR

Nonstop7h 50mIberia

Wed 18/315:45LHR - ORD

Nonstop9h 00mIberia

Deal found 16/10£458

Last-minute flights from O'Hare Intl to Heathrow
Discover last-minute flight deals from O'Hare Intl to Heathrow. Data last updated 17 October 2025 and is based on user searches.

Sun 26/1010:25ORD - LHR

1 stop15h 25mVirgin Atlantic

Tue 4/1109:00LHR - ORD

1 stop12h 10mVirgin Atlantic

Deal found 16/10£407

Mon 3/1119:20ORD - LHR

2 stops39h 40mScandinavian Airlines

Thu 6/1106:40LHR - ORD

1 stop16h 05mScandinavian Airlines

Deal found 16/10£394

Fri 7/1119:20ORD - LHR

2 stops31h 35mScandinavian Airlines

Mon 10/1106:40LHR - ORD

1 stop16h 05mScandinavian Airlines

Deal found 16/10£398

Fri 7/1119:20ORD - LHR

2 stops15h 05mScandinavian Airlines

Sun 9/1106:40LHR - ORD

2 stops16h 05mScandinavian Airlines

Deal found 16/10£404

Sun 9/1118:30ORD - LHR

1 stop10h 20mIcelandair

Tue 18/1112:15LHR - ORD

1 stop11h 05mIcelandair

Deal found 15/10£401

Tue 11/1107:10ORD - LHR

2 stops20h 10mScandinavian Airlines

Mon 17/1106:40LHR - ORD

1 stop16h 05mScandinavian Airlines

Deal found 15/10£403

Tue 11/1107:10ORD - LHR

2 stops20h 10mScandinavian Airlines

Tue 18/1119:50LHR - ORD

2 stops26h 55mScandinavian Airlines

Deal found 16/10£405

Tue 18/1118:30ORD - LHR

1 stop19h 00mIcelandair

Tue 2/1220:35LHR - ORD

1 stop26h 45mIcelandair

Deal found 16/10£392

Tue 18/1110:35ORD - LHR

2 stops25h 05mScandinavian Airlines

Tue 2/1219:50LHR - ORD

2 stops26h 55mScandinavian Airlines

Deal found 16/10£402

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 17 October 2025.

Wed 5/1121:22ORD - LHR

2 stops38h 08mMultiple Airlines

Deal found 15/10£175

Wed 22/1006:40ORD - LHR

2 stops29h 05mMultiple Airlines

Deal found 15/10£176

Thu 27/1112:28ORD - LHR

1 stop12h 27mJetBlue

Deal found 16/10£177

Thu 30/1014:20ORD - LHR

1 stop17h 30mWestJet

Deal found 15/10£178

Tue 11/1106:40ORD - LHR

2 stops32h 55mMultiple Airlines

Deal found 15/10£181

Thu 23/1017:30ORD - LHR

1 stop36h 35mWestJet

Deal found 16/10£183

Fri 14/1120:15ORD - LHR

1 stop19h 20mTAP AIR PORTUGAL

Deal found 15/10£185

Fri 24/1008:40ORD - LHR

2 stops21h 25mMultiple Airlines

Deal found 16/10£185

Tue 18/1106:48ORD - LHR

3 stops28h 42mMultiple Airlines

Deal found 15/10£186

Cheap flight deals from O'Hare Intl to Heathrow

Round-trip from	£392
One-way from	£175
Popular in	June
Cheapest in	February
Average price	£517
Good round-trip deal	£423 or less
Good one-way deal	£293 or less

Icelandair
18/11-2/12
2 total stops
45h 45m total
Chicago to London

Search Deals

5/11
2 total stops
38h 08m total
Chicago to London

Search Deals

Highest demand for flights based on searches. 20% potential increase in price (£112 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (£24 potential savings vs. average return price).

Search Deals

Average for round-trip flights in October 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

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

Thu 29/1

10:40-16:00

2 stops23h 20m

London Heathrow

Fri 6/2

06:40-16:45

1 stop16h 05m

£395

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 26/2

10:40-09:20

2 stops16h 40m

London Heathrow

Mon 2/3

06:40-16:45

1 stop16h 05m

£395

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 18/11

10:35-17:40

2 stops25h 05m

London Heathrow

Mon 24/11

07:05-16:45

2 stops15h 40m

£405

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 26/2

10:40-09:20

2 stops16h 40m

London Heathrow

Sun 1/3

21:05-16:45

2 stops25h 40m

£408

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 29/10

13:22-08:35

1 stop14h 13m

London Heathrow

Wed 5/11

14:10-17:00

Nonstop8h 50m

£439

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 25/11

13:14-06:25

1 stop11h 11m

London Heathrow

Wed 10/12

06:20-18:02

2 stops17h 42m

£440

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 25/11

08:50-07:05

1 stop16h 15m

London Heathrow

Wed 3/12

06:20-18:02

2 stops17h 42m

£440

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 29/10

10:25-06:50

1 stop15h 25m

London Heathrow

Tue 4/11

06:30-16:50

2 stops16h 20m

£442

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 5/1

05:50-09:00

1 stop21h 10m

London Heathrow

Thu 15/1

06:20-17:37

2 stops17h 17m

£447

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 3/12

17:50-07:55

Nonstop8h 05m

London Heathrow

Tue 9/12

06:35-14:10

1 stop13h 35m

£450

Flights are sorted by cheapest return flights first.

Deals found on 17/10

Showing 1-10 of 22 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

Delays

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 55 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 £291). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of £670). 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 in the morning, when flights are generally more expensive, you can save up to 20% on flights from Chicago O'Hare Intl Airport to London Heathrow Airport by exploring options for tickets in the afternoon.

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, Aer Lingus, andIberia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Finnair

7.6

Good

1,332 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

1,332 reviews

Finnair

7.6

Good

1,332 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Aer Lingus

7.2

Good

1,341 reviews

Finnair

7.6

Good

1,332 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Iberia

7.0

Good

2,994 reviews

Finnair

7.6

Good

1,332 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Lufthansa

6.8

Okay

7,497 reviews

Finnair

7.6

Good

1,332 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

British Airways

6.7

Okay

7,457 reviews

Finnair

7.6

Good

1,332 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 23h 20m. Chicago O'Hare Intl Airport and London Heathrow Airport are separated by a distance of 3939 mi.
What are the cheapest airlines flying from Chicago O'Hare Intl Airport to London Heathrow Airport round-trip?
Currently priced at £358, 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 £385 and £414, 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 Royal Jordanian (80%), SriLankan Airlines (74%) and Gulf Air (74%).
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 £283. On average you can expect to pay £397. The most popular route, (Chicago O'Hare Intl - London Heathrow), can usually be booked for £310.
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 £291). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of £670). 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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Croydon

Slough

Gatwick

Hounslow

Northampton

Luton

Wembley

Deal

Ilford

Crawley

Hayes

Watford

Winchester

Swindon

Chichester

Romford

Ipswich

Brentford

Dartford

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£358	Average£523	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
American Airlines	Cheapest£385	Average£629	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Finnair	Cheapest£414	Average£673	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Iberia	Cheapest£446	Average£530	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
British Airways	Cheapest£450	Average£563	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
United Airlines	Cheapest£462	Average£617	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Aer Lingus	Cheapest£493	Average£605	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights

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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.

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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 £175

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 5/11. 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 55 days in advance, depart on a Thursday or Sunday and return on a Wednesday

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 17 October 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 17 October 2025.

Cheap flight deals from O'Hare Intl to Heathrow

Round-trip from

One-way from

Popular in

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Everything you need to know about your flight from Chicago O'Hare Intl Airport to London Heathrow Airport

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

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

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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, Aer Lingus, 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?

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What are the cheapest flights from Chicago O'Hare Intl Airport to 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 17 October 2025.