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$311+ 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 11/4. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BCN
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
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 October, booked 58 days in advance, depart on a Sunday or Monday 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 September 16, 2025.

Round-trip from

$469
(United Airlines)

One-way from

$311
(FlightHub)

Popular in

June

Cheapest in

January

Average price

$736
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. 18% potential increase in price ($177 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($25 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 16, 2025.

This United Airlines deal was found by Cheapflights users on 9/15. 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 9/309:35 amIAD - BCN
1 stop16h 15mUnited Airlines
Fri 10/1011:15 amBCN - IAD
Nonstop8h 50mUnited Airlines
Deal found 9/15$469
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Sun 9/219:35 amIAD - BCN
1 stop16h 15mUnited Airlines
Tue 9/3011:15 amBCN - IAD
Nonstop8h 50mUnited Airlines
Deal found 9/16$470
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Mon 10/1310:20 pmIAD - BCN
1 stop13h 35mLufthansa
Tue 10/216:50 amBCN - IAD
1 stop12h 40mLufthansa
Deal found 9/15$471
This Icelandair deal was found by Cheapflights users on 9/15. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/78:30 pmIAD - BCN
1 stop12h 15mIcelandair
Wed 10/153:45 pmBCN - IAD
1 stop12h 25mIcelandair
Deal found 9/15$473
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Sun 9/286:15 amIAD - BCN
2 stops19h 35mUnited Airlines
Fri 10/1011:15 amBCN - IAD
Nonstop8h 50mUnited Airlines
Deal found 9/14$474
This eDestinos deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/26:00 pmIAD - BCN
1 stop14h 20mIberia
Sun 1/189:15 amBCN - IAD
1 stop13h 15mIberia
Deal found 9/14$475
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Mon 10/138:16 amIAD - BCN
2 stops19h 04mUnited Airlines
Wed 10/2211:15 amBCN - IAD
Nonstop8h 50mUnited Airlines
Deal found 9/15$476
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Wed 10/158:45 pmIAD - BCN
1 stop11h 20mUnited Airlines
Tue 10/2112:10 pmBCN - IAD
2 stops33h 55mUnited Airlines
Deal found 9/15$477
This Gotogate deal was found by Cheapflights users on 9/15. 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.
Wed 10/158:45 pmIAD - BCN
1 stop20h 50mMultiple Airlines
Wed 10/226:50 amBCN - IAD
2 stops20h 15mMultiple Airlines
Deal found 9/15$478
This United Airlines deal was found by Cheapflights users on 9/14. 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 9/309:35 amIAD - BCN
1 stop16h 15mUnited Airlines
Thu 10/166:50 amBCN - IAD
1 stop14h 25mUnited Airlines
Deal found 9/14$479
This United deal was found by Cheapflights users on 9/16. 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 9/216:35 pmIAD - BCN
Nonstop7h 45mMultiple Airlines
Tue 9/306:50 amBCN - IAD
1 stop12h 40mMultiple Airlines
Deal found 9/16$480
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Mon 10/138:45 pmIAD - BCN
1 stop11h 20mSWISS
Fri 10/176:00 amBCN - IAD
1 stop16h 15mSWISS
Deal found 9/15$481

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 September 16, 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 9/21

6:35 pm-8:20 am

Nonstop7h 45m

Barcelona-El Prat

Tue 9/30

11:15 am-2:05 pm

Nonstop8h 50m

$469

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Tue 11/11

9:45 am-9:35 am

1 stop17h 50m

Barcelona-El Prat

Wed 11/19

10:30 am-2:00 pm

Nonstop9h 30m

$469

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Tue 9/30

1:00 pm-7:50 am

1 stop12h 50m

Barcelona-El Prat

Thu 10/9

11:15 am-2:05 pm

Nonstop8h 50m

$469

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Mon 9/29

8:30 am-7:50 am

2 stops17h 20m

Barcelona-El Prat

Fri 10/10

11:15 am-2:05 pm

Nonstop8h 50m

$474

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Sat 10/4

5:37 pm-7:50 am

1 stop32h 13m

Barcelona-El Prat

Fri 10/17

6:50 am-8:00 pm

1 stop19h 10m

$479

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Mon 10/6

6:35 pm-8:20 am

Nonstop7h 45m

Barcelona-El Prat

Fri 10/17

6:50 am-3:50 pm

1 stop15h 00m

$479

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Sun 9/21

6:35 pm-8:20 am

Nonstop7h 45m

Barcelona-El Prat

Tue 9/30

6:50 am-3:50 pm

1 stop15h 00m

$480

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Wed 10/1

12:08 pm-6:00 am

1 stop11h 52m

Barcelona-El Prat

Fri 10/10

9:00 am-7:18 pm

1 stop16h 18m

$484

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Wed 10/29

6:30 am-1:10 pm

1 stop25h 40m

Barcelona-El Prat

Wed 11/5

1:35 pm-4:21 pm

1 stop32h 46m

$486

Washington, D.C.Barcelona

IAD - BCN

IADBCN

Washington, D.C. Dulles Intl

Wed 10/15

8:45 pm-2:05 pm

1 stop11h 20m

Barcelona-El Prat

Tue 10/21

11:15 am-2:05 pm

Nonstop8h 50m

$489

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 24 results
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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 September 12, 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 $1,061). 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 September 16, 2025.

It’s typically best to fly out from Washington, D.C. Dulles Intl Airport to Barcelona in the evening. Doing so could potentially save you 25% 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 Monday evenings when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 September 16, 2025.

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).

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 September 16, 2025.
Peruse reviews from past customers who have flown with United Airlines, Aer Lingus, and TAP AIR PORTUGAL 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
8,924 reviews

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,924 reviews
United Airlines
7.4
Good
8,924 reviews

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Aer Lingus
7.2
Good
1,274 reviews
United Airlines
7.4
Good
8,924 reviews

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
TAP AIR PORTUGAL
7.1
Good
1,975 reviews
United Airlines
7.4
Good
8,924 reviews

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Iberia
7.0
Good
2,924 reviews
United Airlines
7.4
Good
8,924 reviews

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
British Airways
6.7
Okay
7,363 reviews
United Airlines
7.4
Good
8,924 reviews

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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 fly from Washington, D.C. Dulles Intl Airport to Barcelona in about 7h 45m. The time it takes to get you to your destination is usually consistent. Airlines will cover a distance of 4046 mi. All flights are typically nonstop.

  • 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 ($381), Icelandair ($384), and Scandinavian Airlines ($409) offers the cheapest pricing from Washington, D.C. Dulles Intl Airport to Barcelona. These flights start at 52% lower than the current average price 3 months from now.

  • 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 (60%), United Airlines (60%) and Lufthansa (60%).

  • 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 $2,306, our data indicates the cheapest price to be $394. The most popular route (Washington, D.C. Dulles Intl - Barcelona-El Prat), is priced around $375.

  • 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 $19 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 $1,061). 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$381Average$755FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$384Average$565FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$409Average$579FlexibilityNo cancel feeOn-time77%
DeltaCheapest$468Average$897FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$498Average$983FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$498Average$709FlexibilityNo cancel feeOn-time70%
Air FranceCheapest$500Average$881FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$514Average$836FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$524Average$796FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$544Average$1,244FlexibilityNo cancel feeOn-time76%

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