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$378+ Cheap flights from O'Hare Intl (ORD) to Heathrow (LHR)

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 4/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LHR
Apr 21 — Apr 281
Tue 4/21
Tue 4/28
1 adult, Economy
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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

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3. Compare prices and book

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Cheapflights Tip: The best prices from Chicago O'Hare Intl to London Heathrow are usually found in January or April, booked 2 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap 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 March 22, 2026.

This Scandinavian Airlines deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/27:15 pm
ORD
-
LHR
1 stop14h 45m
Scandinavian Airlines
Thu 5/216:40 am
LHR
-
ORD
1 stop15h 30m
Scandinavian Airlines
Deal found 3/18$613
This KAYAK deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/307:15 pm
ORD
-
LHR
2 stops20h 20m
Scandinavian Airlines
Sun 10/45:00 pm
LHR
-
ORD
1 stop29h 10m
Scandinavian Airlines
Deal found 3/17$616
This Gotogate deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/37:20 pm
ORD
-
LHR
2 stops15h 40m
Scandinavian Airlines
Thu 12/109:05 pm
LHR
-
ORD
2 stops25h 40m
Scandinavian Airlines
Deal found 3/17$617
This eDestinos deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:15 pm
ORD
-
LHR
1 stop17h 15m
Scandinavian Airlines
Sun 10/47:30 pm
LHR
-
ORD
1 stop26h 40m
Scandinavian Airlines
Deal found 3/17$619
This Gotogate deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/256:05 pm
ORD
-
LHR
1 stop34h 15m
TAP AIR PORTUGAL
Sat 5/96:00 am
LHR
-
ORD
1 stop16h 05m
TAP AIR PORTUGAL
Deal found 3/20$621
This oojo deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/247:15 pm
ORD
-
LHR
2 stops15h 10m
Scandinavian Airlines
Sat 12/510:35 am
LHR
-
ORD
2 stops36h 10m
Scandinavian Airlines
Deal found 3/17$624
This Scandinavian Airlines deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:15 pm
ORD
-
LHR
2 stops18h 40m
Scandinavian Airlines
Sun 10/117:50 pm
LHR
-
ORD
2 stops26h 20m
Scandinavian Airlines
Deal found 3/18$628
This Booking.com deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/36:00 pm
ORD
-
LHR
1 stop34h 20m
TAP AIR PORTUGAL
Fri 5/156:45 pm
LHR
-
ORD
1 stop27h 20m
TAP AIR PORTUGAL
Deal found 3/20$633

Find flight deals from O'Hare Intl to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$613
(Scandinavian Airlines)

One-way from

$378
(oojo)

Popular in

June

Cheapest in

January

Average price

$765

Good round-trip deal

$723 or less

Good one-way deal

$407 or less
Provider with most accurate pricing for Chicago O'Hare Intl-London Heathrow flight deals.
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Provider most trusted by Cheapflights users for Chicago O'Hare Intl-London Heathrow flights.
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From Chicago O'Hare Intl to London Heathrow
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One-way flight from Chicago O'Hare Intl to London Heathrow
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Highest demand for flights based on searches. 21% potential increase in price ($213 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($45 potential savings vs. average RT price).
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Average for round-trip flights in March 2026
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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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Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated March 22, 2026.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 4/22

7:15 pm-9:40 pm

1 stop20h 25m

London Heathrow

Wed 5/6

5:30 pm-4:10 pm

2 stops52h 40m

$715

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 4/17

7:15 pm-8:55 am

2 stops31h 40m

London Heathrow

Sun 4/19

7:30 pm-4:10 pm

1 stop26h 40m

$721

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 4/27

11:25 am-3:10 pm

1 stop21h 45m

London Heathrow

Tue 5/5

6:00 pm-9:40 am

1 stop21h 40m

$723

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 5/4

9:15 pm-11:15 am

Nonstop8h 00m

London Heathrow

Tue 5/12

7:30 am-5:50 pm

1 stop16h 20m

$806

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 5/6

1:06 pm-6:20 am

1 stop11h 14m

London Heathrow

Fri 5/15

8:40 am-7:20 pm

2 stops16h 40m

$821

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 4/13

6:10 pm-8:30 am

Nonstop8h 20m

London Heathrow

Tue 4/21

2:10 pm-5:20 pm

Nonstop9h 10m

$835

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 5/8

3:15 pm-8:00 am

1 stop10h 45m

London Heathrow

Thu 5/14

9:45 am-12:25 pm

Nonstop8h 40m

$838

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 4/22

4:25 pm-6:45 am

Nonstop8h 20m

London Heathrow

Sat 5/2

7:25 am-2:00 pm

1 stop12h 35m

$857

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 4/19

9:30 pm-11:55 am

Nonstop8h 25m

London Heathrow

Sun 4/26

11:05 am-2:10 pm

Nonstop9h 05m

$885

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 4/23

4:25 pm-6:45 am

Nonstop8h 20m

London Heathrow

Sat 5/2

10:50 am-6:15 pm

1 stop13h 25m

$907

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/19

Showing 1-10 of 23 resultsSorted by cheapest first
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Compare providers for flights from O'Hare Intl to Heathrow

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from O'Hare Intl to Heathrow in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
Trip.comPrice Accuracy1 starTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust 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 Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Chicago O'Hare Intl Airport-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Chicago O'Hare Intl Airport-London Heathrow Airport 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 Heathrow Airport flights, Cheapflights users trust FlightHub the most. FlightHub 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 Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 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 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 round-trip flight from O'Hare Intl to Heathrow. Price data was last updated on March 13, 2026.

The price you pay for your flight from Chicago O'Hare Intl Airport to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 2 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 $391). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of $887). 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 March 22, 2026.

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

How much does it cost to fly round-trip from Chicago O'Hare Intl Airport to London Heathrow Airport?

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

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Chicago O'Hare Intl Airport to London Heathrow Airport trip
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on British Airways

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more
Emily Zemler

Emily Zemler

Expert on Iberia

Emily is a freelance writer and book author based in London covering entertainment and travel. Her work has appeared in Los Angeles Times, Observer, and Conde Nast Traveler She has ventured to more than 40 countries and all seven continents, always in search of a great art museum. She has written extensively about hotels, luxury travel, and aviation.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on ORD and LHR

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

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 March 22, 2026.
Read reviews from past customers who have flown United Airlines,American Airlines, andIcelandair from Chicago O'Hare Intl Airport to London Heathrow Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,458 reviews

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,458 reviews
United Airlines
7.4
Good
9,458 reviews

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
American Airlines
7.1
Good
11,485 reviews
United Airlines
7.4
Good
9,458 reviews

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Icelandair
7.0
Good
625 reviews
United Airlines
7.4
Good
9,458 reviews

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Iberia
7.0
Good
3,147 reviews
United Airlines
7.4
Good
9,458 reviews

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
British Airways
6.7
Okay
7,809 reviews
United Airlines
7.4
Good
9,458 reviews

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

Find useful and relevant information for your journey from O'Hare Intl to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Chicago O'Hare Intl Airport to London Heathrow Airport?

    There are many flights that can get you from Chicago O'Hare Intl Airport to London Heathrow Airport in 8h. Fly via Scandinavian Airlines, Turkish Airlines, or Finnair to get the fastest option. Airlines will cover a distance of 3939 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    JetBlue, at $51, was found to be the cheapest airline from Chicago O'Hare Intl Airport to London Heathrow Airport.Alternate airlines to your destination round-trip include SWISS and Scandinavian Airlines. Users have found that JetBlue is 93% cheaper than the other options available to this destination.

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

    To fly one-way, consider booking your trip with Icelandair, which is currently one of the cheapest options available, starting at $218. TAP AIR PORTUGAL flights start at $237 while deals on British Airways start at $388 one-way.

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

    No one likes to see their flight delayed. When booking a flight from Chicago O'Hare Intl Airport to London Heathrow Airport consider choosing Aer Lingus (80%), Air Canada (77%) or Austrian Airlines (77%) as they are the most reliable in getting you off to your destination on time.

  • 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 $336. On average you can expect to pay $2,281. The most popular route, (Chicago O'Hare Intl - London Heathrow), can usually be booked for $589.

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

    Chicago O'Hare Intl Airport to London Heathrow Airport flights have a layover in Reykjavik most of the time.

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

    Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool are the most popular attractions in Reykjavik if you're in need of something to do during your layover. 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 in need of a car in Reykjavik can rent one for about $59 per day.

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

    Flights departing from Chicago O'Hare Intl Airport and landing in London Heathrow Airport layover in Dublin least frequently.

  • 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 vacation 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 $391). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of $887). 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

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Ilford
Hounslow
Croydon
Gatwick
Southend-on-Sea
Harrow
Eastleigh
Dartford
Dover
Winchester
Orpington
Watford
Northampton
Borehamwood
Broadway
Chipping Norton
Hayes
Kingston upon Thames
Eastbourne
Sutton

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Alternative routes for O'Hare Intl to Heathrow

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

Top 10 airlines flying from O'Hare Intl to Heathrow

Discover the top 10 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 2,558,603 searches. Data last updated March 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$51Average$432FlexibilityNo cancel feeOn-time62%
SWISSCheapest$257Average$594FlexibilityNo cancel feeOn-time79%
Scandinavian AirlinesCheapest$321Average$554FlexibilityNo cancel feeOn-time77%
DeltaCheapest$345Average$732FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$428Average$675FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$477Average$579FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$481Average$803FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$516Average$800FlexibilityNo cancel feeOn-time76%
Alaska AirlinesCheapest$522Average$809FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$537Average$750FlexibilityNo cancel feeOn-time70%

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