HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Barcelona

$351+ 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 8/24. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BCN
May 5 — May 121
Tue 5/5
Tue 5/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to Barcelona with Cheapflights

1. Tell us where you want to go

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

2. Select your favorite providers

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

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Barcelona are usually found in February or January, booked 16 days in advance, depart on a Monday or Sunday and return on a Thursday

Cheap 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 April 5, 2026.

This FlightHub deal was found by Cheapflights users on 3/31. 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.
Fri 10/161:20 pm
IAD
-
BCN
1 stop18h 10m
Turkish Airlines
Fri 10/237:05 pm
BCN
-
IAD
1 stop22h 30m
Turkish Airlines
Deal found 3/31$619
This oojo deal was found by Cheapflights users on 3/31. 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.
Tue 4/215:05 pm
IAD
-
BCN
1 stop17h 50m
TAP AIR PORTUGAL
Tue 4/2810:40 pm
BCN
-
IAD
1 stop27h 55m
TAP AIR PORTUGAL
Deal found 3/31$624
This Justfly.com deal was found by Cheapflights users on 4/1. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/52:30 pm
IAD
-
BCN
1 stop14h 15m
Turkish Airlines
Fri 11/136:30 pm
BCN
-
IAD
1 stop23h 15m
Turkish Airlines
Deal found 4/1$625
This FlightHub deal was found by Cheapflights users on 4/1. 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 9/201:20 pm
IAD
-
BCN
1 stop27h 55m
Turkish Airlines
Sat 10/37:40 am
BCN
-
IAD
1 stop33h 55m
Turkish Airlines
Deal found 4/1$626
This FlightHub deal was found by Cheapflights users on 4/1. 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 4/268:20 pm
IAD
-
BCN
1 stop15h 50m
Scandinavian Airlines
Sat 5/27:00 pm
BCN
-
IAD
1 stop28h 00m
Scandinavian Airlines
Deal found 4/1$627
This Justfly.com deal was found by Cheapflights users on 3/31. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/239:45 pm
IAD
-
BCN
1 stop19h 30m
Turkish Airlines
Sat 10/37:40 am
BCN
-
IAD
1 stop33h 55m
Turkish Airlines
Deal found 3/31$628
This oojo deal was found by Cheapflights users on 3/31. 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.
Thu 11/195:25 pm
IAD
-
BCN
1 stop12h 20m
TAP AIR PORTUGAL
Sun 11/296:05 pm
BCN
-
IAD
1 stop27h 10m
TAP AIR PORTUGAL
Deal found 3/31$634
This FlightHub deal was found by Cheapflights users on 3/31. 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.
Tue 10/69:45 pm
IAD
-
BCN
1 stop31h 00m
Turkish Airlines
Sat 10/172:35 pm
BCN
-
IAD
1 stop27h 00m
Turkish Airlines
Deal found 3/31$635
This FlightHub deal was found by Cheapflights users on 3/31. 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.
Mon 4/208:20 pm
IAD
-
BCN
1 stop15h 50m
Scandinavian Airlines
Fri 5/1511:50 am
BCN
-
IAD
2 stops35h 10m
Scandinavian Airlines
Deal found 3/31$636
This FlightHub deal was found by Cheapflights users on 3/31. 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 10/71:20 pm
IAD
-
BCN
1 stop18h 10m
Turkish Airlines
Sat 10/177:40 am
BCN
-
IAD
1 stop33h 55m
Turkish Airlines
Deal found 3/31$637
This FlightHub deal was found by Cheapflights users on 3/31. 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.
Tue 8/2510:35 pm
IAD
-
BCN
1 stop14h 45m
TAP AIR PORTUGAL
Mon 8/318:20 pm
BCN
-
IAD
1 stop24h 50m
TAP AIR PORTUGAL
Deal found 3/31$639
This Kiwi.com deal was found by Cheapflights users on 4/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/28:20 pm
IAD
-
BCN
1 stop31h 25m
Scandinavian Airlines
Sun 5/109:45 am
BCN
-
IAD
1 stop13h 15m
Scandinavian Airlines
Deal found 4/3$640

Find 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 April 5, 2026.

Round-trip from

$624
(oojo)

One-way from

$351
(Mytrip)

Popular in

June

Cheapest in

February

Average price

$730
From Washington, D.C. Dulles Intl to Barcelona
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Barcelona
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($227 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

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 April 5, 2026.
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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Fri 9/4

6:25 pm-8:20 am

Nonstop7h 55m

Barcelona-El Prat

Sat 9/12

11:15 am-2:30 pm

Nonstop9h 15m

$1,245

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Sun 5/3

6:00 pm-8:20 am

Nonstop8h 20m

Barcelona-El Prat

Tue 5/12

11:15 am-2:30 pm

Nonstop9h 15m

$1,375

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Thu 5/7

6:00 pm-8:20 am

Nonstop8h 20m

Barcelona-El Prat

Fri 5/22

11:15 am-2:25 pm

Nonstop9h 10m

$1,425

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Sun 5/3

6:00 pm-8:20 am

Nonstop8h 20m

Barcelona-El Prat

Sun 5/10

12:15 pm-6:58 pm

1 stop12h 43m

$1,439

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Mon 7/27

6:05 pm-8:20 am

Nonstop8h 15m

Barcelona-El Prat

Sat 8/15

11:15 am-2:05 pm

Nonstop8h 50m

$1,455
Quickest round-trip

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Sun 8/2

6:25 pm-8:20 am

Nonstop7h 55m

Barcelona-El Prat

Mon 8/10

11:15 am-2:05 pm

Nonstop8h 50m

$1,455

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Tue 8/25

6:05 pm-2:25 pm

2 stops14h 20m

Barcelona-El Prat

Tue 9/1

3:20 pm-2:20 pm

2 stops29h 00m

$1,489

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Fri 8/7

5:40 pm-11:35 am

1 stop11h 55m

Barcelona-El Prat

Sun 8/16

11:15 am-2:05 pm

Nonstop8h 50m

$1,528

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Sat 7/18

8:20 pm-8:30 pm

2 stops18h 10m

Barcelona-El Prat

Sun 7/26

9:30 pm-5:00 pm

2 stops25h 30m

$1,596

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Thu 5/14

7:33 pm-5:10 pm

2 stops15h 37m

Barcelona-El Prat

Mon 5/25

9:20 am-6:53 pm

2 stops15h 33m

$1,655

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

Showing 1-10 of 28 resultsSorted by cheapest first
1
2
3

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 April 3, 2026.

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 16 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, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Barcelona (average of $388). Flying from Washington, D.C. Dulles Intl Airport to Barcelona in June is currently the most expensive (average of $679). 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 April 5, 2026.

When flying from Washington, D.C. Dulles Intl Airport to Barcelona, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Explore weekly flight availability from Dulles Intl to Barcelona. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 5, 2026.

The most flights from IAD to S37 are scheduled on a Monday (3 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).

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 April 5, 2026.
Peruse reviews from past customers who have flown with United Airlines,TAP AIR PORTUGAL, andIberia 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.
United Airlines
7.4
Good
9,546 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

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
9,546 reviews
United Airlines
7.4
Good
9,546 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

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
TAP AIR PORTUGAL
7.1
Good
2,189 reviews
United Airlines
7.4
Good
9,546 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

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
3,163 reviews
United Airlines
7.4
Good
9,546 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

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
Lufthansa
6.8
Okay
7,892 reviews
United Airlines
7.4
Good
9,546 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

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
7,853 reviews
United Airlines
7.4
Good
9,546 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

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 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.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Barcelona?

    Airlines like United Airlines and Iberia fly from Washington, D.C. Dulles Intl Airport to Barcelona in about 7h 55m. The time it takes to get you to your destination can typically vary by up to 25h 50m. Airlines will cover a distance of 4046 mi. This flight may include one or multiple stops.

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

    According to our current data, TAP AIR PORTUGAL ($384), Icelandair ($389), and Air France ($461) offers the cheapest pricing from Washington, D.C. Dulles Intl Airport to Barcelona. These flights start at 49% 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 Icelandair, with whom users have recently found tickets for as low as $243. However, be on the lookout for offers from Turkish Airlines 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 (83%), United Airlines (83%) and Lufthansa (83%).

  • 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 $2,755, our data indicates the cheapest price to be $728. The most popular route (Washington, D.C. Dulles Intl - Barcelona-El Prat), is priced around $571.

  • 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 $21 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, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Barcelona (average of $388). Flying from Washington, D.C. Dulles Intl Airport to Barcelona in June is currently the most expensive (average of $679). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 April 5, 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$384Average$671FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$389Average$462FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$461Average$656FlexibilityNo cancel feeOn-time77%
DeltaCheapest$468Average$654FlexibilityNo cancel feeOn-timeN/A
SWISSCheapest$479Average$691FlexibilityNo cancel feeOn-time79%
American AirlinesCheapest$488Average$765FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$489Average$889FlexibilityNo cancel feeOn-time69%
Scandinavian AirlinesCheapest$490Average$644FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$498Average$650FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$499Average$1,087FlexibilityNo cancel feeOn-time76%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.