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

Flying on Icelandair is currently your cheapest option to London, with prices starting at $613. Additional round-trip tickets that might be worth considering are offered by Aer Lingus and American Airlines, with the lowest prices starting at $621 and $621, respectively. You may be able to fly from Chicago O'Hare Intl Airport to London for 19% less than the average price by searching for these airlines.

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

One-way options have recently been found by users for as low as $285 on Icelandair. Other airlines that offer cheap prices include TAP AIR PORTUGAL from $286 and JetBlue from $360 one-way.

What are the most popular routes from Chicago O'Hare Intl Airport to London?

Most travelers choose Chicago O'Hare Intl - London Heathrow, Chicago O'Hare Intl - London Gatwick or Chicago O'Hare Intl - London City when deciding on the best route from Chicago O'Hare Intl Airport to London.

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

Looking at all options, your cheapest flight can be booked for $398. While the most popular route (Chicago O'Hare Intl - London Heathrow) can be booked for $395 on average our data indicates $2,577 when flying from Chicago O'Hare Intl Airport to London.

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

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Chicago O'Hare Intl Airport to London on time: Royal Jordanian (88%), Gulf Air (82%), Malaysia Airlines (79%).

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

The most popular airlines flying from Chicago O'Hare Intl Airport to London are American Airlines, Air Canada and Alaska Airlines. Something to consider prior to booking your flight.

Where are the most common layover locations when flying from Chicago O'Hare Intl Airport to London?

Chicago O'Hare Intl Airport to London flights have a layover in Reykjavik most often. Reykjavik is followed by Copenhagen in terms of the most popular layover location on flights from Chicago O'Hare Intl Airport to London.

Where are the least popular layover locations for Chicago O'Hare Intl Airport to London flights?

Chicago O'Hare Intl Airport to London flights have a layover in Dublin least often.

What are some popular things to do or see while on a layover in Reykjavik?

The majority of Reykjavik visitors spend their time at Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool. Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool can be accessed by traveling approximately 23.2 mi, 23.3 mi, and 24.6 mi, respectively from Reykjavik Keflavik Intl. Travelers can book a car rental at Reykjavik Keflavik Intl for about $47 per day to make their sightseeing more efficient.

What are some popular points of interest to see during a layover in Copenhagen?

Copenhagen travelers tend to visit Tivoli, Kongens Nytorv, and Rådhuspladsen more than any other notable places. Tivoli, Kongens Nytorv and Rådhuspladsen are located about 5.3 mi, 5.1 mi, and 5.2 mi, respectively from Kastrup Copenhagen if you are interested in checking them out. Travelers can rent a car at Kastrup Copenhagen for an average daily rate of $37 to make sightseeing during their layover a little easier.

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

Users have found that leaving on a Tuesday can be a cost-effective option. It’s possible to save up to 14% on your flight compared to booking on days when demand is much higher.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 60 days in advance, which can save you up to 7% on flights from Chicago O'Hare Intl Airport to London compared to booking the week you need them. Waiting 60 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $716. For sooner than that we have options available in the next 3 days from $720.

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

February is one of the best times of the year to fly to London from Chicago O'Hare Intl Airport. Prices for February average $749 per person but you can even find prices for as low as $473. The most expensive prices can be found in the month of June. Opting for a February flight can save you 32% on your journey compared to booking in June

Most accurate provider : When it comes to deals on Chicago O'Hare Intl Airport-London flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Chicago O'Hare Intl Airport-London flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Chicago O'Hare Intl Airport-London flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Chicago O'Hare Intl Airport-London flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago O'Hare Intl Airport-London flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

Yes. In addition to deals on O'Hare Intl to London flights, Cheapflights offers vacation packages that include both flights and hotel.

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

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 London.

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

Yes. Cheapflights offers flight deals from O'Hare Intl to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$284+ Flights from Chicago O'Hare Intl Airport to London - Compare & Save Big

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Find cheap flights from O'Hare Intl to London with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Chicago O'Hare Intl to London are usually found in April or February, booked 32 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from O'Hare Intl to London

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$613 (oojo)
One-way from	$285 (Icelandair)
Popular in	June
Cheapest in	April
Average price	$652
Good round-trip deal	$694 or less
Good one-way deal	$490 or less

Provider with most accurate pricing for Chicago O'Hare Intl-London (LON) flight deals.

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Provider most trusted by Cheapflights users for Chicago O'Hare Intl-London (LON) flights.

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From Chicago O'Hare Intl to London (LON)

Search Deals

One-way flight from Chicago O'Hare Intl to London (LON)

Search Deals

Highest demand for flights based on searches. 16% potential increase in price ($145 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).

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Average for round-trip flights in April 2025

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Price to beat on a round-trip flight from Chicago O'Hare Intl to London (LON).

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Price to beat on a one-way flight from Chicago O'Hare Intl to London (LON).

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Find flight deals from O'Hare Intl to London

Cheapest flights from O'Hare Intl to London
Explore the most affordable flight options available from O'Hare Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 30, 2025.

Thu 11/66:30 pmORD - LGW

1 stop10h 25mIcelandair

Tue 11/2511:55 amLGW - ORD

1 stop11h 25mIcelandair

Deal found 4/28

$611

Thu 8/287:15 pmORD - LHR

1 stop17h 15mScandinavian Airlines

Tue 9/23:35 pmLHR - ORD

2 stops54h 35mScandinavian Airlines

Deal found 4/29

$613

Wed 4/3010:20 pmORD - LHR

Nonstop7h 55mIberia

Tue 5/61:30 pmLHR - ORD

1 stop13h 03mIberia

Deal found 4/29

$614

Sun 5/410:15 pmORD - LGW

1 stop31h 30mMultiple Airlines

Tue 5/131:00 pmLGW - ORD

2 stops24h 27mMultiple Airlines

Deal found 4/29

$614

Wed 9/247:59 pmORD - LHR

1 stop11h 11mDelta

Fri 10/179:40 amLHR - ORD

1 stop14h 05mDelta

Deal found 4/29

$616

Fri 10/37:25 pmORD - LHR

1 stop10h 30mIcelandair

Mon 10/139:25 pmLHR - ORD

1 stop26h 50mIcelandair

Deal found 4/29

$617

Sun 5/43:45 pmORD - LHR

1 stop10h 15mAer Lingus

Tue 5/138:50 amLHR - ORD

1 stop11h 10mAer Lingus

Deal found 4/29

$621

Mon 9/226:10 pmORD - LGW

2 stops20h 15mTAP AIR PORTUGAL

Tue 10/214:25 pmLGW - ORD

1 stop29h 45mTAP AIR PORTUGAL

Deal found 4/29

$622

Tue 5/610:25 pmORD - LHR

Nonstop7h 50mFinnair

Wed 5/2110:20 amLHR - ORD

1 stop13h 30mFinnair

Deal found 4/29

$633

Tue 5/610:40 amORD - LHR

1 stop17h 20mMultiple Airlines

Mon 5/125:10 pmLHR - ORD

1 stop25h 00mMultiple Airlines

Deal found 4/29

$647

Tue 9/301:35 pmORD - LHR

1 stop13h 55mJetBlue

Tue 10/1411:55 amLHR - ORD

1 stop14h 59mJetBlue

Deal found 4/29

$649

Wed 8/137:25 pmORD - LTN

2 stops19h 20mMultiple Airlines

Mon 8/189:55 pmLTN - ORD

2 stops29h 20mMultiple Airlines

Deal found 4/28

$653

Best flights from O'Hare Intl to London
Discover carefully curated flight deals from O'Hare Intl to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 30, 2025.

Fri 10/37:25 pmORD - LGW

1 stop13h 15mIcelandair

Mon 10/63:40 pmLGW - ORD

1 stop32h 35mIcelandair

Deal found 4/29

$613

Tue 5/138:15 amORD - LGW

1 stop16h 20mMultiple Airlines

Tue 5/202:30 pmLGW - ORD

1 stop24h 29mMultiple Airlines

Deal found 4/29

$615

Sun 5/43:45 pmORD - LHR

1 stop10h 15mAer Lingus

Tue 5/138:50 amLHR - ORD

1 stop11h 10mAer Lingus

Deal found 4/29

$621

Sun 5/1111:35 amORD - LGW

1 stop13h 00mAmerican Airlines

Tue 5/2010:40 amLGW - ORD

2 stops19h 16mAmerican Airlines

Deal found 4/29

$621

Mon 9/226:10 pmORD - LGW

2 stops20h 15mTAP AIR PORTUGAL

Tue 10/214:25 pmLGW - ORD

1 stop29h 45mTAP AIR PORTUGAL

Deal found 4/29

$622

Tue 5/137:00 amORD - LHR

1 stop17h 25mDelta

Wed 6/46:15 amLHR - ORD

1 stop14h 45mDelta

Deal found 4/29

$623

Tue 5/138:30 pmORD - LHR

Nonstop8h 00mIberia

Wed 5/219:15 amLHR - ORD

Nonstop8h 30mIberia

Deal found 4/29

$630

Tue 5/610:25 pmORD - LHR

Nonstop7h 50mFinnair

Wed 5/2110:20 amLHR - ORD

1 stop13h 30mFinnair

Deal found 4/29

$633

Tue 5/133:40 pmORD - LHR

1 stop11h 40mLufthansa

Wed 5/2111:30 amLHR - ORD

1 stop14h 25mLufthansa

Deal found 4/28

$636

Wed 8/67:05 pmORD - LGW

1 stop16h 50mSWISS

Mon 8/186:35 pmLGW - ORD

1 stop23h 35mSWISS

Deal found 4/29

$645

Sun 5/118:15 pmORD - LHR

1 stop13h 45mScandinavian Airlines

Fri 5/236:40 amLHR - ORD

1 stop15h 30mScandinavian Airlines

Deal found 4/28

$654

Tue 5/1311:45 amORD - LGW

1 stop14h 25mBritish Airways

Wed 5/212:30 pmLGW - ORD

1 stop33h 43mBritish Airways

Deal found 4/29

$656

Last-minute flights from O'Hare Intl to London
Discover last-minute flight deals from O'Hare Intl to London. Data last updated April 30, 2025 and is based on user searches.

Wed 4/3010:20 pmORD - LHR

Nonstop7h 55mIberia

Tue 5/61:30 pmLHR - ORD

1 stop13h 03mIberia

Deal found 4/29

$614

Wed 4/301:50 pmORD - LHR

1 stop13h 00mDelta

Wed 5/79:20 amLHR - ORD

1 stop15h 30mDelta

Deal found 4/29

$618

Wed 4/3010:20 pmORD - LHR

Nonstop7h 55mAmerican Airlines

Mon 5/512:15 pmLHR - ORD

Nonstop8h 25mAmerican Airlines

Deal found 4/29

$654

Sun 5/410:15 pmORD - LGW

1 stop31h 30mMultiple Airlines

Tue 5/131:00 pmLGW - ORD

2 stops24h 27mMultiple Airlines

Deal found 4/29

$614

Sun 5/410:15 pmORD - LGW

1 stop31h 30mIcelandair

Tue 5/133:40 pmLGW - ORD

1 stop32h 35mIcelandair

Deal found 4/29

$615

Sun 5/43:45 pmORD - LHR

1 stop10h 15mAer Lingus

Tue 5/138:50 amLHR - ORD

1 stop11h 10mAer Lingus

Deal found 4/29

$621

Sun 5/410:25 amORD - LHR

1 stop14h 20mVirgin Atlantic

Tue 5/138:40 amLHR - ORD

1 stop11h 30mVirgin Atlantic

Deal found 4/29

$641

Sun 5/49:15 pmORD - LHR

Nonstop7h 45mIberia

Tue 5/1311:05 amLHR - ORD

Nonstop8h 45mIberia

Deal found 4/29

$642

Sun 5/44:05 pmORD - LHR

Nonstop8h 15mUnited Airlines

Tue 5/138:45 amLHR - ORD

1 stop13h 10mUnited Airlines

Deal found 4/29

$664

Sun 5/410:40 amORD - LHR

1 stop13h 50mAir Canada

Tue 5/139:30 amLHR - ORD

2 stops15h 24mAir Canada

Deal found 4/29

$668

Tue 5/61:29 pmORD - LGW

2 stops12h 41mAmerican Airlines

Tue 5/1310:40 amLGW - ORD

2 stops18h 28mAmerican Airlines

Deal found 4/29

$624

Tue 5/610:25 pmORD - LHR

Nonstop7h 50mFinnair

Wed 5/2110:20 amLHR - ORD

1 stop13h 30mFinnair

Deal found 4/29

$633

One-way flights from O'Hare Intl to London
Search for one-way flight options from O'Hare Intl to London. Find affordable one-way fares based on user searches. Data last updated April 30, 2025.

Wed 5/710:15 pmORD - LHR

1 stop16h 05mIcelandair

Deal found 4/28

$285

Wed 5/710:15 pmORD - LGW

1 stop10h 25mIcelandair

Deal found 4/29

$285

Fri 7/186:00 pmORD - LHR

1 stop22h 00mTAP AIR PORTUGAL

Deal found 4/29

$286

Tue 6/241:43 pmORD - LGW

1 stop35h 12mMultiple Airlines

Deal found 4/29

$296

Mon 7/286:10 pmORD - LHR

2 stops18h 20mMultiple Airlines

Deal found 4/28

$301

Sun 6/18:50 amORD - LTN

2 stops32h 05mMultiple Airlines

Deal found 4/28

$306

Wed 7/305:10 pmORD - SEN

2 stops21h 40mMultiple Airlines

Deal found 4/29

$339

Wed 5/710:15 pmORD - STN

2 stops14h 35mMultiple Airlines

Deal found 4/29

$345

Sat 5/1010:50 amORD - LHR

1 stop13h 40mJetBlue

Deal found 4/29

$360

Mon 7/216:10 pmORD - LCY

2 stops21h 30mMultiple Airlines

Deal found 4/29

$360

Mon 7/286:10 pmORD - LGW

2 stops20h 15mTAP AIR PORTUGAL

Deal found 4/28

$364

Mon 5/53:45 pmORD - LHR

1 stop13h 25mAer Lingus

Deal found 4/29

$365

Cheapflights Fare Finder

Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Sun 5/4

10:15 pm-11:45 am

1 stop31h 30m

London Gatwick

Tue 5/13

1:00 pm-7:27 am

2 stops24h 27m

$614

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Sun 5/4

10:15 pm-11:45 am

1 stop31h 30m

London Gatwick

Tue 5/13

3:40 pm-6:15 pm

1 stop32h 35m

$615

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 5/4

3:45 pm-8:00 am

1 stop10h 15m

London Heathrow

Tue 5/13

8:50 am-2:00 pm

1 stop11h 10m

$621

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Sun 5/11

11:35 am-6:35 am

1 stop13h 00m

London Gatwick

Tue 5/20

10:40 am-11:56 pm

2 stops19h 16m

$621

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 5/13

1:30 pm-7:15 am

1 stop11h 45m

London Heathrow

Fri 5/30

9:00 am-3:00 pm

1 stop12h 00m

$623

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 5/14

8:30 pm-10:30 am

Nonstop8h 00m

London Heathrow

Thu 5/22

2:25 pm-5:00 pm

Nonstop8h 35m

$626

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 5/7

10:15 pm-8:20 pm

1 stop16h 05m

London Heathrow

Wed 5/14

1:05 pm-6:15 pm

1 stop11h 10m

$628

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 5/6

10:25 pm-12:15 pm

Nonstop7h 50m

London Heathrow

Wed 5/21

10:20 am-5:50 pm

1 stop13h 30m

$633

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 5/6

10:40 am-10:00 am

1 stop17h 20m

London Heathrow

Mon 5/12

5:10 pm-12:10 pm

1 stop25h 00m

$647

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Sun 5/11

8:15 pm-11:59 pm

2 stops21h 44m

London Stansted

Wed 5/21

9:05 pm-6:25 pm

2 stops27h 20m

$656

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 60 results

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Compare providers for flights from O'Hare Intl to London

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from O'Hare Intl to London in April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
AranGrant	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
ScholarTrip	Price Accuracy3 stars	Trust Score*3 stars
Kiwi.com	Price Accuracy3 stars	Trust Score*3 stars
oojo	Price Accuracy3 stars	Trust Score*3 stars
Mytrip	Price Accuracy3 stars	Trust Score*3 stars
Flightnetwork	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Chicago O'Hare Intl Airport-London flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Chicago O'Hare Intl Airport-London flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Chicago O'Hare Intl Airport-London flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Chicago O'Hare Intl Airport-London flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago O'Hare Intl Airport-London flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

The best insider tips for Chicago O'Hare Intl Airport to London flights

Cheapflights partnered with top experts to bring you the best recommendations for your Chicago O'Hare Intl Airport to London trip

Airlines

British Airways

BA's Club Suite offers private pods with doors for enhanced privacy on long-haul flights.

BA's World Traveller Plus offers extra seat width and legroom, ideal for long-haul comfort.

Read more about British Airwaysby Gabriel Leigh

Iberia

Iberia's premium economy offers 37-inch legroom and noise-canceling headphones for long-haul flights.

Iberia's Wi-Fi is free for messaging apps for Business class and Iberia Plus members.

Airports

ORD

Prepare for long walks between terminals at ORD. Use the free shuttle train outside security for easier transfers.

LHR

Take the Heathrow Express for the fastest route to central London, reaching Paddington Station quickly.

Our travel experts

Gabriel Leigh

Expert on British Airways

Emily Zemler

Expert on Iberia

Ramsey Qubein

Expert on ORD and LHR

Best time to book a flight from O'Hare Intl to London

Have a flexible travel schedule? Discover the best time to fly to London 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

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

The best time to book flights from Chicago O'Hare Intl Airport to London is 32 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?

Currently, November is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London (average of $661). Flying from Chicago O'Hare Intl Airport to London in June is currently the most expensive (average of $1,110). 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 LON?

It’s typically best to fly out from Chicago O'Hare Intl Airport to London in the morning. Doing so could potentially save you 13% on the flight price compared to flying in the evening, which is usually more expensive.

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

Travelers seeking maximum savings on their Chicago O'Hare Intl Airport to London flight should consider departing on Wednesday at noon when fares are most often at their lowest. Monday at noon 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

The most flights from ORD to LON are scheduled on a Monday (57 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (50 on average).

Rainfall in London by month

In terms of precipitation, rainfall in London ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London when rainfall is around 1.6 in.

Temperature in London by month

If weather is an important factor for your trip to London, 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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing London

Read reviews from past customers who have flown Delta, KLM and LOT from Chicago to London. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,936 reviews

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

7,936 reviews

Delta

8.0

Very good

7,936 reviews

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

1,333 reviews

Delta

8.0

Very good

7,936 reviews

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.

LOT

7.6

Good

1,069 reviews

Delta

8.0

Very good

7,936 reviews

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

1,275 reviews

Delta

8.0

Very good

7,936 reviews

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

1,588 reviews

Delta

8.0

Very good

7,936 reviews

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

What are the cheapest airlines flying from Chicago O'Hare Intl Airport to London round-trip?
Flying on Icelandair is currently your cheapest option to London, with prices starting at $613. Additional round-trip tickets that might be worth considering are offered by Aer Lingus and American Airlines, with the lowest prices starting at $621 and $621, respectively. You may be able to fly from Chicago O'Hare Intl Airport to London for 19% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from Chicago O'Hare Intl Airport to London one-way?
One-way options have recently been found by users for as low as $285 on Icelandair. Other airlines that offer cheap prices include TAP AIR PORTUGAL from $286 and JetBlue from $360 one-way.
What are the most popular routes from Chicago O'Hare Intl Airport to London?
Most travelers choose Chicago O'Hare Intl - London Heathrow, Chicago O'Hare Intl - London Gatwick or Chicago O'Hare Intl - London City when deciding on the best route from Chicago O'Hare Intl Airport to London.
What are the most reliable airlines from Chicago O'Hare Intl Airport to London?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Chicago O'Hare Intl Airport to London on time: Royal Jordanian (88%), Gulf Air (82%), Malaysia Airlines (79%).
What are the cheapest flights from Chicago O'Hare Intl Airport to London?
Looking at all options, your cheapest flight can be booked for $398. While the most popular route (Chicago O'Hare Intl - London Heathrow) can be booked for $395 on average our data indicates $2,577 when flying from Chicago O'Hare Intl Airport to London.
Where are the most common layover locations when flying from Chicago O'Hare Intl Airport to London?
Chicago O'Hare Intl Airport to London flights have a layover in Reykjavik most often. Reykjavik is followed by Copenhagen in terms of the most popular layover location on flights from Chicago O'Hare Intl Airport to London.
What are some popular things to do or see while on a layover in Reykjavik?
The majority of Reykjavik visitors spend their time at Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool. Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool can be accessed by traveling approximately 23.2 mi, 23.3 mi, and 24.6 mi, respectively from Reykjavik Keflavik Intl. Travelers can book a car rental at Reykjavik Keflavik Intl for about $47 per day to make their sightseeing more efficient.
What are some popular points of interest to see during a layover in Copenhagen?
Copenhagen travelers tend to visit Tivoli, Kongens Nytorv, and Rådhuspladsen more than any other notable places. Tivoli, Kongens Nytorv and Rådhuspladsen are located about 5.3 mi, 5.1 mi, and 5.2 mi, respectively from Kastrup Copenhagen if you are interested in checking them out. Travelers can rent a car at Kastrup Copenhagen for an average daily rate of $37 to make sightseeing during their layover a little easier.
Where are the least popular layover locations for Chicago O'Hare Intl Airport to London flights?
Chicago O'Hare Intl Airport to London flights have a layover in Dublin least often.
Can I find deals for flights from O'Hare Intl to London that include hotel bookings?
Yes. In addition to deals on O'Hare Intl to London flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from O'Hare Intl to London?
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 London.
Can I find deals for business class flights from O'Hare Intl to London?
Yes. Cheapflights offers flight deals from O'Hare Intl to London 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?
Currently, November is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London (average of $661). Flying from Chicago O'Hare Intl Airport to London in June is currently the most expensive (average of $1,110). 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.

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Top 10 airlines flying from O'Hare Intl to London

Airline	Cheapest	Average	Flexibility	On-time
SWISS	Cheapest$257	Average$678	FlexibilityNo cancel fee	On-time79%
Scandinavian Airlines	Cheapest$381	Average$594	FlexibilityNo cancel fee	On-time77%
Lufthansa	Cheapest$460	Average$911	FlexibilityNo cancel fee	On-time76%
Icelandair	Cheapest$468	Average$622	FlexibilityNo cancel fee	On-time76%
TAP AIR PORTUGAL	Cheapest$506	Average$775	FlexibilityNo cancel fee	On-timeN/A
JetBlue	Cheapest$516	Average$717	FlexibilityNo cancel fee	On-time62%
Air Canada	Cheapest$554	Average$746	FlexibilityNo cancel fee	On-time67%
Finnair	Cheapest$559	Average$712	FlexibilityNo cancel fee	On-time76%
Iberia	Cheapest$578	Average$854	FlexibilityNo cancel fee	On-time77%
Aer Lingus	Cheapest$585	Average$746	FlexibilityNo cancel fee	On-timeN/A

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$284+ Cheap flights from O'Hare Intl (ORD) to London (LON)

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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheapflights Tip: The best prices from Chicago O'Hare Intl to London are usually found in April or February, booked 32 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

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Cheapest flights from O'Hare Intl to LondonExplore the most affordable flight options available from O'Hare Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 30, 2025.

Explore the most affordable flight options available from O'Hare Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 30, 2025.

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Best time to book a flight from O'Hare Intl to London

Have a flexible travel schedule? Discover the best time to fly to London from O'Hare Intl with our price prediction graph.

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

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

Use this chart to determine the optimal time to book a round-trip flight from O'Hare Intl to London. Price data was last updated on April 25, 2025.

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

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

Find hourly flight availability from O'Hare Intl to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 30, 2025.

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

Use this chart to determine the cheapest time to fly round-trip from O'Hare Intl to London. Price data was last updated on December 1, 2024.

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

Explore weekly flight availability from O'Hare Intl to London. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 30, 2025.

Rainfall in London by month

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Temperature in London by month

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Reviews of airlines servicing London

Read reviews from past customers who have flown Delta, KLM and LOT from Chicago to London. You can also see how each airline stacks up in terms of 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 London. 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 round-trip?

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

What are the most popular routes from Chicago O'Hare Intl Airport to London?

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

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

Where are the most common layover locations when flying from Chicago O'Hare Intl Airport to London?

What are some popular things to do or see while on a layover in Reykjavik?

What are some popular points of interest to see during a layover in Copenhagen?

Where are the least popular layover locations for Chicago O'Hare Intl Airport to London flights?

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

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

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

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

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Top 10 airlines flying from O'Hare Intl to London

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Cheapest flights from O'Hare Intl to London
Explore the most affordable flight options available from O'Hare Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 30, 2025.