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$369+ Cheap flights from Dulles Intl (IAD) to Lisbon (LIS)

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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LIS
mar. 23 — mar. 301
dom. 3/23
dom. 3/30
1 adult, Economy
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The best prices from Washington, D.C. Dulles Intl to Lisbon Humberto Delgado are usually found in February or November, booked 49 days in advance, depart on a Tuesday or Monday and return on a Wednesday

Cheap flight deals from Dulles Intl to Lisbon

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Lisbon (LIS). 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 marzo 18, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$555
(Gotogate)

One-way from

$369
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$795

Good round-trip deal

$653 or less

Good one-way deal

$422 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Lisbon Humberto Delgado flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Lisbon Humberto Delgado flights.
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From Washington, D.C. Dulles Intl to Lisbon Humberto Delgado
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One-way flight from Washington, D.C. Dulles Intl to Lisbon Humberto Delgado
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Highest demand for flights based on searches. 20% potential increase in price ($228 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Lisbon Humberto Delgado.
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Lisbon Humberto Delgado.
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Find flight deals from Dulles Intl to Lisbon

Cheapest flights from Dulles Intl to Lisbon
Explore the most affordable flight options available from Dulles Intl to Lisbon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on marzo 18, 2025.

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.
sáb. 4/268:30 pmIAD - LIS
1 stop19h 50mMultiple Airlines
mar. 5/65:30 pmLIS - IAD
Nonstop8h 20mMultiple Airlines
Deal found 3/17$555
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.
dom. 11/98:40 pmIAD - LIS
1 stop9h 55mRoyal Air Maroc
mar. 11/185:55 pmLIS - IAD
1 stop29h 45mRoyal Air Maroc
Deal found 3/17$569
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/243:00 pmIAD - LIS
1 stop20h 00mTurkish Airlines
dom. 3/3010:55 amLIS - IAD
1 stop28h 50mTurkish Airlines
Deal found 3/18$586
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/211:15 pmIAD - LIS
1 stop17h 05mIcelandair
dom. 8/3110:25 pmLIS - IAD
1 stop25h 55mIcelandair
Deal found 3/17$590
This Vueling Global 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 Vueling Global is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/214:35 pmIAD - LIS
1 stop22h 30mIberia
mar. 10/286:45 pmLIS - IAD
1 stop26h 45mIberia
Deal found 3/17$664
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.
dom. 4/65:45 pmIAD - LIS
Nonstop7h 20mTAP AIR PORTUGAL
vie. 5/212:00 pmLIS - IAD
Nonstop8h 20mTAP AIR PORTUGAL
Deal found 3/17$671
This KLM 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/412:11 pmIAD - LIS
1 stop14h 49mKLM
dom. 4/135:00 amLIS - IAD
1 stop15h 35mKLM
Deal found 3/18$675
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 4/2612:11 pmIAD - LIS
1 stop14h 49mDelta
dom. 5/45:40 amLIS - IAD
1 stop18h 35mDelta
Deal found 3/17$683
This Virgin Atlantic 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/2312:35 pmIAD - LIS
2 stops15h 25mVirgin Atlantic
lun. 12/110:00 amLIS - IAD
1 stop13h 28mVirgin Atlantic
Deal found 3/17$717
This United 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/21:00 pmIAD - LIS
2 stops15h 20mUnited Airlines
mar. 4/811:25 amLIS - IAD
2 stops33h 49mUnited Airlines
Deal found 3/18$718
This Aeromexico 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 Aeromexico is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/17:05 pmIAD - LIS
1 stop31h 55mAir France
lun. 10/63:55 pmLIS - IAD
2 stops31h 33mAir France
Deal found 3/18$756

Find flights from Dulles Intl to Lisbon within your budget

Customize your flight search to find flights from Dulles Intl to Lisbon 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 marzo 18, 2025.

Fly from

Dulles Intl

Fly to

Lisbon

Route

Depart

Return

Price

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

sáb. 4/26

8:30 pm-9:20 pm

1 stop19h 50m

Lisbon Humberto Delgado

mar. 5/6

5:30 pm-8:50 pm

Nonstop8h 20m

$555

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

sáb. 8/2

11:15 pm-9:20 pm

1 stop17h 05m

Lisbon Humberto Delgado

dom. 8/31

10:25 pm-7:20 pm

1 stop25h 55m

$590

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

lun. 3/31

9:40 pm-9:55 am

1 stop31h 15m

Lisbon Humberto Delgado

mar. 4/15

4:30 pm-10:45 am

1 stop23h 15m

$608

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

dom. 4/6

10:20 pm-10:40 am

Nonstop7h 20m

Lisbon Humberto Delgado

jue. 5/1

5:30 pm-8:50 pm

Nonstop8h 20m

$671

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

vie. 4/4

12:11 pm-8:00 am

1 stop14h 49m

Lisbon Humberto Delgado

dom. 4/13

5:00 am-3:35 pm

1 stop15h 35m

$675

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

sáb. 4/26

12:11 pm-8:00 am

1 stop14h 49m

Lisbon Humberto Delgado

dom. 5/4

5:40 am-7:15 pm

1 stop18h 35m

$683

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

dom. 9/14

9:05 pm-5:40 pm

1 stop15h 35m

Lisbon Humberto Delgado

jue. 9/25

10:05 pm-7:05 pm

1 stop26h 00m

$704

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

mié. 4/2

1:00 pm-9:20 am

2 stops15h 20m

Lisbon Humberto Delgado

mar. 4/8

11:25 am-4:14 pm

2 stops33h 49m

$718

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

vie. 4/18

6:30 pm-10:25 pm

1 stop22h 55m

Lisbon Humberto Delgado

vie. 5/2

6:50 pm-7:53 pm

2 stops30h 03m

$760

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

lun. 3/31

5:44 pm-9:20 am

1 stop10h 36m

Lisbon Humberto Delgado

mié. 4/16

11:25 am-9:46 am

2 stops27h 21m

$781

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/18

Showing 1-10 of 24 results
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Compare providers for flights from Dulles Intl to Lisbon

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 Dulles Intl to Lisbon in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightsMojoPrice Accuracy-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 Washington, D.C. Dulles Intl Airport-Lisbon flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Lisbon flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Lisbon flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Lisbon 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 Washington, D.C. Dulles Intl Airport-Lisbon flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

The best insider tips for Washington, D.C. Dulles Intl Airport to Lisbon flights

Find out what our experts recommend to make the most of your Washington, D.C. Dulles Intl Airport to Lisbon trip
Airports
IAD

For evening departures, expect crowded check-in areas at IAD. Arrive early to navigate the busy terminals smoothly.

Read more about IADby Ramsey Qubein
LIS

Upon arrival at LIS, use the metro line for a quick 20-minute ride to downtown Lisbon from Terminal 1.

Read more about LISby Ramsey Qubein
Our travel experts
Ramsey Qubein

Ramsey Qubein

Expert on LIS and IAD

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

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.

Best time to book a flight from Dulles Intl to Lisbon

Have a flexible travel schedule? Discover the best time to fly to Lisbon from Dulles 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.

Travel insights for flights from Dulles Intl to Lisbon

Get recent, data-driven insights about flights from Dulles Intl to Lisbon including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to Lisbon?

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Lisbon. Price data was last updated on March 14, 2025.

The price you pay for your flight from Washington, D.C. Dulles Intl Airport to Lisbon may vary depending on when you book. For the best chance of a lower fare, look to book 49 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 Washington, D.C. Dulles Intl Airport to Lisbon?

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Lisbon (average of $612). Flying from Washington, D.C. Dulles Intl Airport to Lisbon in June is currently the most expensive (average of $1,219). 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 IAD to LIS?

Find hourly flight availability from Dulles Intl to Lisbon. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated marzo 18, 2025.

It’s optimal to fly from Washington, D.C. Dulles Intl Airport to Lisbon at noon. By choosing this option you can save up to 26% on the cost of your flight, compared to a flight in the evening.

Weekly flight availability from Washington, D.C. Dulles Intl Airport to Lisbon

Explore weekly flight availability from Dulles Intl to Lisbon. 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 marzo 18, 2025.

The most flights from IAD to LIS are scheduled on a Monday (5 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (5 on average).

Rainfall in Lisbon by month

Plan your trip to Lisbon by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Lisbon ranges from 0.2 - 4.8 inches per month. December is typically the wettest month, when rainfall can reach 4.8 in. July is typically the driest time to visit Lisbon when rainfall is around 0.2 in.

Temperature in Lisbon by month

Plan your trip to Lisbon by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Lisbon, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing Lisbon

Get insights into the airlines that provide service to Lisbon. 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 Lisbon. Reviews last updated marzo 18, 2025.
To help decide which airline to fly from Washington, D.C. to Lisbon, see what other customers have to say about Delta, Porter Airlines and KLM. 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
7,908 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

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
7,908 reviews
Delta
8.0
Very good
7,908 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

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.
Porter Airlines
8.0
Very good
277 reviews
Delta
8.0
Very good
7,908 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

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
1,318 reviews
Delta
8.0
Very good
7,908 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

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
1,565 reviews
Delta
8.0
Very good
7,908 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

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.
Air France
7.4
Good
1,422 reviews
Delta
8.0
Very good
7,908 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

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

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

  • What airport do you fly into for flights to Lisbon from Washington, D.C. Dulles Intl?

    Most people fly into Lisbon Humberto Delgado (LIS) if they book a flight to Lisbon from Washington, D.C. Dulles Intl. On average, Humberto Delgado has 5 inbound flights from Washington, D.C. Dulles Intl per day from 15 airlines. Lisbon Humberto Delgado is conveniently located just 4.2 mi from Lisbon’s city center.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Lisbon round-trip?

    Cheapflights users have booked flights from Washington, D.C. Dulles Intl Airport to Lisbon round-trip from $590. Other airlines that can offer you cheap pricing are Turkish Airlines, from $608, and TAP AIR PORTUGAL, from $671. Icelandair is currently priced 35% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to Lisbon one-way?

    The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as $369. However, be on the lookout for offers from Porter Airlines and Scandinavian Airlines, as they are both options that can get you from Washington, D.C. Dulles Intl Airport to Lisbon for a low price.

  • What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to Lisbon?

    The top 3 most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to Lisbon are JetBlue (86%), TAP AIR PORTUGAL (86%) and Air Canada (78%).

  • What are the cheapest flights from Washington, D.C. Dulles Intl Airport to Lisbon?

    The cheapest flight price from Washington, D.C. Dulles Intl Airport to Lisbon is $298. On average you can expect to pay $2,276. The most popular route, (Washington, D.C. Dulles Intl - Lisbon Humberto Delgado), can usually be booked for $555.

  • Can I find deals for flights from Dulles Intl to Lisbon that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Lisbon flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Lisbon?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Lisbon.

  • Can I find deals for business class flights from Dulles Intl to Lisbon?

    Yes. Cheapflights offers flight deals from Dulles Intl to Lisbon 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 Washington, D.C. Dulles Intl Airport to Lisbon?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Lisbon (average of $612). Flying from Washington, D.C. Dulles Intl Airport to Lisbon in June is currently the most expensive (average of $1,219). 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 Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Sintra
Almada
Beja
Costa da Caparica
Nazaré
Evora
Torres Vedras
Oeiras
Sesimbra
Fátima

Browse thousands of different options on Cheapflights for your next trip

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Top 10 airlines flying from Dulles Intl to Lisbon

Discover the top 10 airlines that operate flights from Dulles Intl to Lisbon. 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 marzo 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest$332Average$384FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$430Average$747FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$536Average$906FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$536Average$765FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$540Average$727FlexibilityNo cancel feeOn-time70%
Royal Air MarocCheapest$552Average$653FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$604Average$962FlexibilityNo cancel feeOn-time67%
Turkish AirlinesCheapest$621Average$674FlexibilityNo cancel feeOn-time77%
Air FranceCheapest$631Average$918FlexibilityNo cancel feeOn-time77%
SWISSCheapest$631Average$883FlexibilityNo cancel feeOn-time79%
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