What is the cheapest airline that flies from Washington, D.C. to San Sebastián?

American Airlines is the most popular carrier operating from Washington, D.C. to San Sebastián

How long does it take to fly to San Sebastian?

On average, it takes 14h to fly from Washington, D.C. to San Sebastian if you fly out of Washington, D.C. (the most popular airport in Washington, D.C.) and into Bilbao (the most popular airport in San Sebastian). If you’re flying out of Baltimore and into Bilbao, then the flight time is around 14h 35m.

What airlines fly to San Sebastian?

Iberia, United Airlines and Lufthansa are the top three most popular airlines that fly to San Sebastian from Washington, D.C. according to our data. Iberia is the first choice among our users, with 35% of people opting to fly with this airline when traveling to San Sebastian. Keep in mind that there are 5 different airlines that fly to San Sebastian on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Washington, D.C. to San Sebastián Airport?

Prices for flights from Washington, D.C. to San Sebastián Airport were last updated today.

How many operators does momondo search for flights from Washington, D.C. to San Sebastián Airport?

There is 1 operator available for flights from Washington, D.C. to San Sebastián Airport as of September 2025.

How old do you have to be to fly from Washington, D.C. to San Sebastián Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. to San Sebastián Airport.

What documentation or ID do you need to fly to San Sebastián Airport?

The travel and health documents you'll need for your trip to San Sebastián Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at San Sebastián Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$484 Cheap Flights from Washington, D.C. to San Sebastian in 2025/26

Q: What is the typical price of a round-trip flight between Washington, D.C. and San Sebastian?

Prices are currently low for flights on this route. Typical prices usually range from $716 to $1,194. The lowest price recently found on this route was $570.

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Find the cheapest flights from Washington, D.C. to San Sebastian

Round-trip

One-way

Cheap round-trip flights

4:35 pm - 8:40 amIAD-EAS

10h 05m1 stop

9:20 am - 3:00 pmEAS-IAD

11h 40m1 stop

$570American Airlines

Find Deal

Mon, Oct 6 - Wed, Oct 22

1:09 pm - 8:40 amIAD-EAS

13h 31m2 stops

9:20 am - 3:00 pmEAS-IAD

11h 40m1 stop

$574American Airlines

Find Deal

Mon, Oct 6 - Wed, Oct 22

11:59 am - 8:40 amDCA-EAS

15h 41m2 stops

9:20 am - 11:56 pmEAS-DCA

20h 36m2 stops

$587American Airlines

Find Deal

Wed, Oct 29 - Wed, Nov 5

11:59 am - 8:40 amDCA-EAS

15h 41m2 stops

9:20 am - 10:48 pmEAS-DCA

19h 28m2 stops

$617American Airlines

Find Deal

Thu, Oct 30 - Thu, Nov 6

7:00 pm - 8:50 pmIAD-EAS

20h 50m1 stop

9:20 am - 4:30 pmEAS-IAD

13h 10m1 stop

$632Iberia

Find Deal

Thu, Oct 30 - Thu, Nov 6

2:18 pm - 8:40 amIAD-EAS

13h 22m2 stops

9:20 am - 4:30 pmEAS-IAD

13h 10m1 stop

$647American Airlines

Find Deal

Thu, Oct 30 - Thu, Nov 6

4:35 pm - 8:40 amIAD-EAS

10h 05m1 stop

9:30 pm - 4:35 pmEAS-IAD

24h 05m2 stops

$680Iberia

Find Deal

Wed, Oct 22 - Mon, Oct 27

2:18 pm - 8:40 amIAD-EAS

13h 22m2 stops

9:30 pm - 11:07 pmEAS-IAD

31h 37m2 stops

$696

Find Deal

Thu, Oct 30 - Thu, Nov 6

6:20 pm - 8:50 pmIAD-EAS

20h 30m2 stops

9:30 pm - 3:35 pmEAS-IAD

24h 05m2 stops

$822Iberia

Find Deal

Fri, Nov 7 - Tue, Nov 11

5:05 pm - 8:50 pmIAD-EAS

21h 45m2 stops

9:30 pm - 3:35 pmEAS-IAD

24h 05m2 stops

$823Iberia

Find Deal

Fri, Nov 7 - Tue, Nov 11

American Airlines flights from Washington, D.C. to San Sebastian

Our best American Airlines deals on Washington, D.C. to San Sebastian flight tickets

American Airlines

Oct 6

IAD4:35 pmWashington, D.C. Dulles Intl

10h 05m

1 stop

EAS8:40 amSan Sebastián

Oct 22

EAS9:20 amSan Sebastián

11h 40m

1 stop

IAD3:00 pmWashington, D.C. Dulles Intl

$570

Find similar

American Airlines

Oct 6

IAD1:09 pmWashington, D.C. Dulles Intl

13h 31m

2 stops

EAS8:40 amSan Sebastián

Oct 22

EAS9:20 amSan Sebastián

11h 40m

1 stop

IAD3:00 pmWashington, D.C. Dulles Intl

$574

Find similar

American Airlines

Oct 29

DCA11:59 amWashington, D.C. Reagan-National

15h 41m

2 stops

EAS8:40 amSan Sebastián

Nov 5

EAS9:20 amSan Sebastián

20h 36m

2 stops

DCA11:56 pmWashington, D.C. Reagan-National

$587

Find similar

Iberia flights from Washington, D.C. to San Sebastian

Our best Iberia deals on Washington, D.C. to San Sebastian flight tickets

Iberia

Oct 30

IAD7:00 pmWashington, D.C. Dulles Intl

20h 50m

1 stop

EAS8:50 pmSan Sebastián

Nov 6

EAS9:20 amSan Sebastián

13h 10m

1 stop

IAD4:30 pmWashington, D.C. Dulles Intl

$632

Find similar

Iberia

Oct 22

IAD4:35 pmWashington, D.C. Dulles Intl

10h 05m

1 stop

EAS8:40 amSan Sebastián

Oct 27

EAS9:30 pmSan Sebastián

24h 05m

2 stops

IAD4:35 pmWashington, D.C. Dulles Intl

$680

Find similar

Iberia

Nov 7

IAD6:20 pmWashington, D.C. Dulles Intl

20h 30m

2 stops

EAS8:50 pmSan Sebastián

Nov 11

EAS9:30 pmSan Sebastián

24h 05m

2 stops

IAD3:35 pmWashington, D.C. Dulles Intl

$822

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from Washington, D.C. to San Sebastian that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.San Sebastian

IAD - EAS

IADEAS

Washington, D.C. Dulles Intl

Mon 10/6

4:35 pm-8:40 am

1 stop10h 05m

San Sebastián

Wed 10/22

9:20 am-3:00 pm

1 stop11h 40m

$570

Washington, D.C.San Sebastian

IAD - EAS

IADEAS

Washington, D.C. Dulles Intl

Mon 10/6

1:09 pm-8:40 am

2 stops13h 31m

San Sebastián

Wed 10/22

9:20 am-3:00 pm

1 stop11h 40m

$574

Washington, D.C.San Sebastian

DCA - EAS

DCAEAS

Washington, D.C. Reagan-National

Wed 10/29

11:59 am-8:40 am

2 stops15h 41m

San Sebastián

Wed 11/5

9:20 am-11:56 pm

2 stops20h 36m

$587

Washington, D.C.San Sebastian

DCA - EAS

DCAEAS

Washington, D.C. Reagan-National

Thu 10/30

11:59 am-8:40 am

2 stops15h 41m

San Sebastián

Thu 11/6

9:20 am-10:48 pm

2 stops19h 28m

$617

Washington, D.C.San Sebastian

IAD - EAS

IADEAS

Washington, D.C. Dulles Intl

Thu 10/30

7:00 pm-8:50 pm

1 stop20h 50m

San Sebastián

Thu 11/6

9:20 am-4:30 pm

1 stop13h 10m

$632

Washington, D.C.San Sebastian

IAD - EAS

IADEAS

Washington, D.C. Dulles Intl

Thu 10/30

2:18 pm-8:40 am

2 stops13h 22m

San Sebastián

Thu 11/6

9:20 am-4:30 pm

1 stop13h 10m

$647

Washington, D.C.San Sebastian

IAD - EAS

IADEAS

Washington, D.C. Dulles Intl

Wed 10/22

4:35 pm-8:40 am

1 stop10h 05m

San Sebastián

Mon 10/27

9:30 pm-4:35 pm

2 stops24h 05m

$680

Washington, D.C.San Sebastian

IAD - EAS

IADEAS

Washington, D.C. Dulles Intl

Thu 10/30

2:18 pm-8:40 am

2 stops13h 22m

San Sebastián

Thu 11/6

9:30 pm-11:07 pm

2 stops31h 37m

$696

Washington, D.C.San Sebastian

IAD - EAS

IADEAS

Washington, D.C. Dulles Intl

Fri 11/7

6:20 pm-8:50 pm

2 stops20h 30m

San Sebastián

Tue 11/11

9:30 pm-3:35 pm

2 stops24h 05m

$822

Washington, D.C.San Sebastian

IAD - EAS

IADEAS

Washington, D.C. Dulles Intl

Fri 11/7

5:05 pm-8:50 pm

2 stops21h 45m

San Sebastián

Tue 11/11

9:30 pm-3:35 pm

2 stops24h 05m

$823

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first

How to get the cheapest flight ticket from Washington, D.C. to San Sebastian

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the typical price of a round-trip flight between Washington, D.C. and San Sebastian?

What is the cheapest day to depart on your flight to San Sebastian?

On average, the least expensive day to fly to San Sebastian from Washington, D.C. is on a Thursday. momondo users have found tickets for Thursday departures for as low as $702. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Washington, D.C. to San Sebastian for around $1,191.

What is the cheapest time of day to depart on your flight to San Sebastian?

Flying to San Sebastian from Washington, D.C. in the evening is the least expensive time of day to depart. momondo users have found prices as low as $957 when looking at flights departing in the evening. Flights to San Sebastian are more costly in the afternoon, with an average ticket price of $1,087. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

When to book flights from Washington, D.C. to San Sebastian

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. to San Sebastian according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Washington, D.C. to San Sebastian (WAS to EAS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to San Sebastian

Direct flights	None

There are no direct flights from Washington, D.C. to San Sebastian. There are no popular flight routes from Washington, D.C. to San Sebastian.

Search flight deals

How far is Washington, D.C. to San Sebastián by plane?
The straight-line distance from Washington, D.C. to San Sebastián is 3781.9 mi. 10h 05m is a normal flight duration for this route.
When did momondo last update prices for flights from Washington, D.C. to San Sebastián Airport?
Prices for flights from Washington, D.C. to San Sebastián Airport were last updated today.
How many operators does momondo search for flights from Washington, D.C. to San Sebastián Airport?
There is 1 operator available for flights from Washington, D.C. to San Sebastián Airport as of September 2025.
How old do you have to be to fly from Washington, D.C. to San Sebastián Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. to San Sebastián Airport.
What documentation or ID do you need to fly to San Sebastián Airport?
The travel and health documents you'll need for your trip to San Sebastián Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at San Sebastián Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Washington, D.C. to San Sebastian?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Washington, D.C. to San Sebastian is Iberia (56% of total bookings). The next most popular airline is American Airlines (44%).

Best airlines flying from Washington, D.C. to San Sebastian

Compare and see reviews for airlines that fly from Washington, D.C. to San Sebastian with momondo

Airline	Rating	Free Cancellation	Price
Iberia	PriceFrom $561	Free Cancellation	Rating 7.0 2,924 reviews		Search Iberia flights

Irun

Hondarribia

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to San Sebastian?

Finding the right flight to San Sebastian from Washington, D.C. is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to San Sebastian quick and easy, saving you time and money.

Can I find flights from Washington, D.C. to San Sebastian with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Washington, D.C. to San Sebastian flights to just show those with flexible booking policies.

How can momondo help me find flights from Washington, D.C. to San Sebastian?

momondo provides multiple filters to help you find the best flight to San Sebastian from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Washington, D.C. to San Sebastian right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to San Sebastian from Washington, D.C.. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your San Sebastian trip

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Cheap flights from Washington, D.C. to San Sebastian from $484

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to San Sebastian departing on 2/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

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Find the cheapest flights from Washington, D.C. to San Sebastian

Cheap round-trip flights

Cheap one-way flights

American Airlines flights from Washington, D.C. to San Sebastian

Our best American Airlines deals on Washington, D.C. to San Sebastian flight tickets

Iberia flights from Washington, D.C. to San Sebastian

Our best Iberia deals on Washington, D.C. to San Sebastian flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Washington, D.C. to San Sebastian that are best for you.

See travel insights to San Sebastian from

How to get the cheapest flight ticket from Washington, D.C. to San Sebastian

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Washington, D.C. and San Sebastian?

What is the cheapest day to depart on your flight to San Sebastian?

What is the cheapest time of day to depart on your flight to San Sebastian?

What is the cheapest airline that flies from Washington, D.C. to San Sebastián?

American Airlines is the most popular carrier operating from Washington, D.C. to San Sebastián

What airlines fly to San Sebastian?

How long does it take to fly to San Sebastian?

When to book flights from Washington, D.C. to San Sebastian

Cheap Washington, D.C. to San Sebastian (WAS to EAS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to San Sebastian

Direct flights

How far is Washington, D.C. to San Sebastián by plane?

When did momondo last update prices for flights from Washington, D.C. to San Sebastián Airport?

How many operators does momondo search for flights from Washington, D.C. to San Sebastián Airport?

How old do you have to be to fly from Washington, D.C. to San Sebastián Airport?

What documentation or ID do you need to fly to San Sebastián Airport?

What is the most popular airline from Washington, D.C. to San Sebastian?

Best airlines flying from Washington, D.C. to San Sebastian

Compare and see reviews for airlines that fly from Washington, D.C. to San Sebastian with momondo

Traveling to a place near San Sebastian?

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to San Sebastian?

Can I find flights from Washington, D.C. to San Sebastian with flexible booking policies on momondo?

How can momondo help me find flights from Washington, D.C. to San Sebastian?

I’m not ready to book a flight from Washington, D.C. to San Sebastian right now. Can momondo alert me if prices change?

An easier way to manage your San Sebastian trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Spain

Airports servicing Basque Country