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$270+ Cheap flights from Dulles Intl (IAD) to Barcelona

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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BCN
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Barcelona are usually found in January or November, booked 58 days in advance, depart on a Monday or Tuesday and return on a Wednesday

Cheap flight deals from Dulles Intl to Barcelona

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Barcelona (S37). 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 July 30, 2025.

Round-trip from

$497
(United)

One-way from

$270
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$970
From Washington, D.C. Dulles Intl to Barcelona
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One-way flight from Washington, D.C. Dulles Intl to Barcelona
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Highest demand for flights based on searches. 16% potential increase in price ($164 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Dulles Intl to Barcelona

Cheapest flights from Dulles Intl to Barcelona
Explore the most affordable flight options available from Dulles Intl to Barcelona. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2025.

This United deal was found by Cheapflights users on 7/29. 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.
Sun 8/176:30 pmIAD - BCN
Nonstop7h 50mMultiple Airlines
Tue 8/2612:10 pmBCN - IAD
1 stop29h 03mMultiple Airlines
Deal found 7/29$497
This United Airlines deal was found by Cheapflights users on 7/28. 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.
Tue 11/116:05 pmIAD - BCN
Nonstop8h 15mUnited Airlines
Mon 11/171:45 pmBCN - IAD
1 stop32h 05mUnited Airlines
Deal found 7/28$498
This FlightHub deal was found by Cheapflights users on 7/29. 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.
Thu 10/210:05 pmIAD - BCN
1 stop14h 05mScandinavian Airlines
Sun 10/199:40 amBCN - IAD
1 stop16h 19mScandinavian Airlines
Deal found 7/29$500
This FlightHub deal was found by Cheapflights users on 7/28. 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.
Wed 8/2011:15 pmIAD - BCN
1 stop33h 30mIcelandair
Mon 9/13:45 pmBCN - IAD
1 stop33h 35mIcelandair
Deal found 7/28$501
This Delta deal was found by Cheapflights users on 7/29. 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.
Wed 9/179:20 pmIAD - BCN
1 stop12h 20mDelta
Wed 9/249:30 amBCN - IAD
2 stops16h 07mDelta
Deal found 7/29$503
This FlightHub deal was found by Cheapflights users on 7/28. 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.
Sun 9/74:30 pmIAD - BCN
1 stop12h 20mITA Airways
Fri 9/196:20 amBCN - IAD
1 stop14h 20mITA Airways
Deal found 7/28$511
This Air Canada deal was found by Cheapflights users on 7/29. 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.
Mon 8/1810:20 amIAD - BCN
2 stops15h 30mAir Canada
Wed 8/2712:10 pmBCN - IAD
2 stops15h 15mAir Canada
Deal found 7/29$512
This Ovago deal was found by Cheapflights users on 7/28. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2110:20 pmIAD - BCN
1 stop13h 35mLufthansa
Fri 9/2611:15 amBCN - IAD
Nonstop8h 50mLufthansa
Deal found 7/28$514
This Air France deal was found by Cheapflights users on 7/30. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/179:20 pmIAD - BCN
1 stop12h 20mAir France
Tue 9/306:10 amBCN - IAD
1 stop16h 10mAir France
Deal found 7/30$515
This Booking.com deal was found by Cheapflights users on 7/28. 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.
Fri 9/198:25 pmIAD - BCN
1 stop20h 00mAer Lingus
Fri 9/2611:00 amBCN - IAD
1 stop13h 55mAer Lingus
Deal found 7/28$521
This Iberia deal was found by Cheapflights users on 7/27. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/144:35 pmIAD - BCN
1 stop18h 45mIberia
Thu 8/282:50 pmBCN - IAD
1 stop30h 10mIberia
Deal found 7/27$525
This Austrian Airlines deal was found by Cheapflights users on 7/28. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/155:10 pmIAD - BCN
2 stops44h 35mAustrian Airlines
Wed 11/199:55 amBCN - IAD
1 stop34h 45mAustrian Airlines
Deal found 7/28$528

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Barcelona 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 July 30, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Barcelona that are best for you.

Fly from

Dulles Intl

Fly to

Barcelona

Route

Depart

Return

Price

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Sun 8/17

6:30 pm-8:20 am

Nonstop7h 50m

Barcelona-El Prat

Tue 8/26

12:10 pm-11:13 am

1 stop29h 03m

$497

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Mon 10/13

6:35 pm-8:20 am

Nonstop7h 45m

Barcelona-El Prat

Mon 10/20

10:20 am-1:30 pm

1 stop33h 10m

$498

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Thu 10/2

10:05 pm-6:10 pm

1 stop14h 05m

Barcelona-El Prat

Sun 10/19

9:40 am-7:59 pm

1 stop16h 19m

$500

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Wed 8/20

11:15 pm-2:45 pm

1 stop33h 30m

Barcelona-El Prat

Mon 9/1

3:45 pm-7:20 pm

1 stop33h 35m

$501

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Wed 9/17

9:20 pm-3:40 pm

1 stop12h 20m

Barcelona-El Prat

Wed 9/24

9:30 am-7:37 pm

2 stops16h 07m

$503

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Sun 9/7

4:30 pm-10:50 am

1 stop12h 20m

Barcelona-El Prat

Fri 9/19

6:20 am-2:40 pm

1 stop14h 20m

$511

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Mon 8/18

10:20 am-7:50 am

2 stops15h 30m

Barcelona-El Prat

Wed 8/27

12:10 pm-9:25 pm

2 stops15h 15m

$512

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Sun 9/21

10:20 pm-5:55 pm

1 stop13h 35m

Barcelona-El Prat

Fri 9/26

11:15 am-2:05 pm

Nonstop8h 50m

$514

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Wed 9/17

9:20 pm-3:40 pm

1 stop12h 20m

Barcelona-El Prat

Tue 9/30

6:10 am-4:20 pm

1 stop16h 10m

$515

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Fri 9/19

8:25 pm-10:25 pm

1 stop20h 00m

Barcelona-El Prat

Fri 9/26

11:00 am-6:55 pm

1 stop13h 55m

$521

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 20 results
1
2

Best time to book a flight from Dulles Intl to Barcelona

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

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Barcelona

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

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Barcelona. Price data was last updated on July 25, 2025.

The price you pay for your flight from Washington, D.C. Dulles Intl Airport to Barcelona may vary depending on when you book. For the best chance of a lower fare, look to book 58 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 Barcelona?

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Barcelona (average of $523). Flying from Washington, D.C. Dulles Intl Airport to Barcelona in June is currently the most expensive (average of $1,057). 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 BCN?

Find hourly flight availability from Dulles Intl to Barcelona. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 30, 2025.

It’s typically best to fly out from Washington, D.C. Dulles Intl Airport to Barcelona at noon. Doing so could potentially save you 29% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to Barcelona?

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Barcelona. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Barcelona flight should consider departing on Tuesday evenings 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.

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to Barcelona?

Reviews of airlines servicing Barcelona

Get insights into the airlines that provide service to Barcelona. 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 Barcelona. Reviews last updated July 30, 2025.
Peruse reviews from past customers who have flown with Delta, SWISS, and United Airlines from Washington, D.C. Dulles Intl Airport to Barcelona to help guide your decision. 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
7,980 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,686 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Turkish Airlines
7.3
Good
3,928 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Scandinavian Airlines
7.3
Good
1,453 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Barcelona. 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 Washington, D.C. Dulles Intl Airport to Barcelona round-trip?

    According to our current data, United Airlines ($498), Scandinavian Airlines ($500), and Icelandair ($501) offers the cheapest pricing from Washington, D.C. Dulles Intl Airport to Barcelona. These flights start at 39% lower than the current average price 3 months from now.

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

    The cheapest airline one-way is Turkish Airlines, with whom users have recently found tickets for as low as $292. However, be on the lookout for offers from Iberia and TAP AIR PORTUGAL, as they are both options that can get you from Washington, D.C. Dulles Intl Airport to Barcelona for a low price.

  • What are the most popular routes from Washington, D.C. Dulles Intl Airport to Barcelona?

    When deciding which route to take from Washington, D.C. Dulles Intl Airport to Barcelona consider Washington, D.C. Dulles Intl - Barcelona-El Prat, Washington, D.C. Dulles Intl - Girona Costa Brava or Washington, D.C. Dulles Intl - Reus as they are the most popular.

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

    The top 3 most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to Barcelona are Air Canada (39%), United Airlines (39%) and Lufthansa (39%).

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

    Looking for the cheapest flight from Washington, D.C. Dulles Intl Airport to Barcelona? While on average our users pay $2,333, our data indicates the cheapest price to be $394. The most popular route (Washington, D.C. Dulles Intl - Barcelona-El Prat), is priced around $369.

  • Where are the most common layover locations when flying from Washington, D.C. Dulles Intl Airport to Barcelona?

    Flights departing from Washington, D.C. Dulles Intl Airport and landing in Barcelona layover in Lisbon most frequently.

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

    Chiado, Praça do Marquês de Pombal, and Londres are the most popular attractions in Lisbon if you're in need of something to do during your layover. Chiado, Praça do Marquês de Pombal and Londres are located about 4.5 mi, 3.6 mi, and 2.3 mi, respectively from Lisbon Humberto Delgado if you are interested in checking them out. Travelers can rent a car at Lisbon Humberto Delgado for an average daily rate of $27 to make sightseeing during their layover a little easier.

  • Where are the least popular layover locations for Washington, D.C. Dulles Intl Airport to Barcelona flights?

    Washington, D.C. Dulles Intl Airport to Barcelona flights that have layovers will least frequently stop in Madrid.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl to Barcelona 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 Barcelona?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Barcelona (average of $523). Flying from Washington, D.C. Dulles Intl Airport to Barcelona in June is currently the most expensive (average of $1,057). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 10 airlines flying from Dulles Intl to Barcelona

Discover the top 10 airlines that operate flights from Dulles Intl to Barcelona. 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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest$308Average$402FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$384Average$591FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$409Average$585FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$455Average$761FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$468Average$902FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$498Average$702FlexibilityNo cancel feeOn-time70%
Air FranceCheapest$517Average$886FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$519Average$1,123FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$524Average$796FlexibilityNo cancel feeOn-time71%
Royal Air MarocCheapest$560Average$604FlexibilityNo cancel feeOn-time75%

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