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$233+ 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 10/31. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LHR
sep. 10 — sep. 171
mié. 9/10
mié. 9/17
1 adult, Economy
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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 Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from O'Hare Intl to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated septiembre 5, 2025.

Round-trip from

$502
(United)

One-way from

$233
(Booking.com)

Popular in

June

Cheapest in

February

Average price

$723

Good round-trip deal

$605 or less

Good one-way deal

$422 or less
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. 20% potential increase in price ($202 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($41 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Chicago O'Hare Intl to London Heathrow.
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Price to beat on a one-way flight from Chicago O'Hare Intl to London Heathrow.
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Find flight deals from O'Hare Intl to Heathrow

Cheapest flights from O'Hare Intl to Heathrow
Explore the most affordable flight options available from O'Hare Intl to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 5, 2025.

This United deal was found by Cheapflights users on 9/3. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/218:40 amORD - LHR
1 stop15h 50mMultiple Airlines
mar. 9/306:00 amLHR - ORD
1 stop13h 20mMultiple Airlines
Deal found 9/3$502
This United Airlines deal was found by Cheapflights users on 9/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/191:36 pmORD - LHR
1 stop10h 44mUnited Airlines
lun. 11/241:45 pmLHR - ORD
1 stop32h 35mUnited Airlines
Deal found 9/3$503
This Air Canada deal was found by Cheapflights users on 9/4. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/271:59 pmORD - LHR
2 stops12h 11mMultiple Airlines
mar. 11/119:00 amLHR - ORD
2 stops15h 39mMultiple Airlines
Deal found 9/4$504
This United Airlines deal was found by Cheapflights users on 9/4. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/146:00 pmORD - LHR
Nonstop8h 20mUnited Airlines
mié. 10/226:50 amLHR - ORD
1 stop11h 15mUnited Airlines
Deal found 9/4$505
This United Airlines deal was found by Cheapflights users on 9/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/224:00 pmORD - LHR
Nonstop8h 20mUnited Airlines
mar. 10/216:50 amLHR - ORD
1 stop11h 15mUnited Airlines
Deal found 9/2$506
This CrystalTravel deal was found by Cheapflights users on 9/4. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/1510:30 amORD - LHR
2 stops16h 50mScandinavian Airlines
mié. 11/1910:20 amLHR - ORD
1 stop12h 25mScandinavian Airlines
Deal found 9/4$507
This United Airlines deal was found by Cheapflights users on 9/4. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/139:05 pmORD - LHR
1 stop28h 35mUnited Airlines
mar. 10/79:30 amLHR - ORD
1 stop30h 21mUnited Airlines
Deal found 9/4$508
This Delta deal was found by Cheapflights users on 9/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/145:37 pmORD - LHR
1 stop13h 33mDelta
mar. 9/238:40 amLHR - ORD
1 stop11h 30mDelta
Deal found 9/4$509
This FlightHub deal was found by Cheapflights users on 9/3. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/1910:15 pmORD - LHR
1 stop31h 40mIcelandair
mar. 9/309:25 pmLHR - ORD
1 stop29h 50mIcelandair
Deal found 9/3$510
This United Airlines deal was found by Cheapflights users on 9/4. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/213:35 pmORD - LHR
1 stop12h 00mUnited Airlines
lun. 10/274:40 pmLHR - ORD
1 stop27h 30mUnited Airlines
Deal found 9/4$511
This Air Canada deal was found by Cheapflights users on 9/4. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/510:00 amORD - LHR
2 stops15h 10mAir Canada
mar. 11/119:00 amLHR - ORD
2 stops15h 39mAir Canada
Deal found 9/4$512
This United Airlines deal was found by Cheapflights users on 9/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/104:00 pmORD - LHR
Nonstop8h 20mUnited Airlines
mié. 10/88:30 amLHR - ORD
Nonstop9h 00mUnited Airlines
Deal found 9/3$513

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 septiembre 5, 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to London Heathrow Airport that are best for you.

Fly from

O'Hare Intl

Fly to

Heathrow

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

mié. 11/12

5:50 pm-7:55 am

Nonstop8h 05m

London Heathrow

mié. 11/19

11:10 am-6:25 pm

1 stop13h 15m

$502

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

sáb. 2/28

8:15 pm-8:30 am

1 stop30h 15m

London Heathrow

mié. 3/18

9:00 am-5:20 pm

1 stop13h 20m

$504

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

dom. 9/21

10:40 am-6:30 am

1 stop13h 50m

London Heathrow

mar. 9/30

6:50 am-12:05 pm

1 stop11h 15m

$505

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

mié. 10/15

4:00 pm-6:20 am

Nonstop8h 20m

London Heathrow

mié. 10/22

6:50 am-12:05 pm

1 stop11h 15m

$505

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

mar. 10/14

6:00 pm-8:20 am

Nonstop8h 20m

London Heathrow

mié. 10/22

6:50 am-12:05 pm

1 stop11h 15m

$505

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

mar. 10/14

6:00 pm-8:20 am

Nonstop8h 20m

London Heathrow

mar. 10/21

6:50 am-12:05 pm

1 stop11h 15m

$505

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

mié. 10/15

4:00 pm-6:20 am

Nonstop8h 20m

London Heathrow

jue. 10/23

6:50 am-12:05 pm

1 stop11h 15m

$505

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

mié. 11/5

3:45 pm-5:55 am

Nonstop8h 10m

London Heathrow

mié. 11/12

6:50 am-12:10 pm

1 stop11h 20m

$506

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

mar. 9/23

6:00 pm-8:20 am

Nonstop8h 20m

London Heathrow

mar. 10/21

6:50 am-12:05 pm

1 stop11h 15m

$506

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

mié. 9/24

4:00 pm-6:20 am

Nonstop8h 20m

London Heathrow

jue. 10/23

6:50 am-12:05 pm

1 stop11h 15m

$506

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/3

Showing 1-10 of 23 results
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The best insider tips for Chicago O'Hare Intl Airport to London Heathrow Airport flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Chicago O'Hare Intl Airport to London Heathrow Airport trip
Airlines
British Airways

BA's Club Suite offers private pods with doors, ideal for long-haul comfort.


BA's World Traveller Plus offers extra legroom and upgraded service, ideal for long-haul flights.

Read more about British Airwaysby Gabriel Leigh
Iberia

Iberia's premium economy offers 37-inch legroom and priority boarding, enhancing long-haul comfort.


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

Read more about Iberiaby Emily Zemler
Airports
ORD

For a quick snack before departure, grab some Garrett Popcorn, a Chicago favorite, near gate B8 in Terminal 1.

Read more about ORDby Ramsey Qubein
LHR

Take the Heathrow Express for the fastest route to central London, arriving at Paddington Station for easy connections.

Read more about LHRby Ramsey Qubein
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on British Airways

Gabriel Leigh

Gabriel Leigh

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 Zemler

Emily Zemler

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

Ramsey Qubein

Ramsey Qubein

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

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 August 29, 2025.

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 28 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, November is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport (average of $661). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of $1,097). 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 septiembre 5, 2025.

A simple way to save on the total cost of your ticket is to fly from Chicago O'Hare Intl Airport to London Heathrow Airport in the morning. If you’re flexible enough to do this you can expect to save up to 20% on your trip compared to booking a flight in the afternoon.

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

Use this chart to determine the cheapest time to fly round-trip from O'Hare Intl to Heathrow. Price data was last updated on August 31, 2025.

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

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 septiembre 5, 2025.
Read reviews from past customers who have flown Finnair, United Airlines, and American Airlines 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.
Finnair
7.6
Good
1,321 reviews

Food

6.7

Comfort

7.5

Crew

8.1

Overall

7.6

Boarding

7.6

Entertainment

6.9

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
1,321 reviews
Finnair
7.6
Good
1,321 reviews

Food

6.7

Comfort

7.5

Crew

8.1

Overall

7.6

Boarding

7.6

Entertainment

6.9

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.
United Airlines
7.4
Good
8,939 reviews
Finnair
7.6
Good
1,321 reviews

Food

6.7

Comfort

7.5

Crew

8.1

Overall

7.6

Boarding

7.6

Entertainment

6.9

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.
American Airlines
7.2
Good
10,000 reviews
Finnair
7.6
Good
1,321 reviews

Food

6.7

Comfort

7.5

Crew

8.1

Overall

7.6

Boarding

7.6

Entertainment

6.9

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.
Iberia
7.0
Good
2,913 reviews
Finnair
7.6
Good
1,321 reviews

Food

6.7

Comfort

7.5

Crew

8.1

Overall

7.6

Boarding

7.6

Entertainment

6.9

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.
British Airways
6.7
Okay
7,345 reviews
Finnair
7.6
Good
1,321 reviews

Food

6.7

Comfort

7.5

Crew

8.1

Overall

7.6

Boarding

7.6

Entertainment

6.9

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.

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 05m. Fly via United Airlines to get the fastest option. Airlines will cover a distance of 3939 mi. Most flights are nonstop.

  • 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 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 (64%), American Airlines (62%) or Air Canada (62%) 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 $386. On average you can expect to pay $2,518. The most popular route, (Chicago O'Hare Intl - London Heathrow), can usually be booked for $418.

  • 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?

    Harpa, Hallgrímskirkja, and Laugardalslaug Geothermal Pool are the most popular attractions in Reykjavik if you're in need of something to do during your layover. Harpa, Hallgrímskirkja, and Laugardalslaug Geothermal Pool can be accessed by traveling approximately 23.3 mi, 23.2 mi, and 24.6 mi, respectively from Reykjavik Keflavik Intl. Travelers in need of a car in Reykjavik can rent one for about $60 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, November is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport (average of $661). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of $1,097). 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
Hounslow
Hayes
Thornton Heath
Southend-on-Sea
Harrow
Canterbury
Croydon
Eastleigh
Dartford
Dover
Winchester
Stratford-upon-Avon
Orpington
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Chelmsford
Bedford

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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 septiembre 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$51Average$632FlexibilityNo cancel feeOn-time62%
SWISSCheapest$257Average$671FlexibilityNo cancel feeOn-time79%
Scandinavian AirlinesCheapest$338Average$598FlexibilityNo cancel feeOn-time77%
DeltaCheapest$345Average$760FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$400Average$920FlexibilityNo cancel feeOn-time76%
IcelandairCheapest$471Average$598FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$508Average$786FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$551Average$822FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$554Average$766FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$569Average$764FlexibilityNo cancel feeOn-time70%

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