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Cheap flights from Philadelphia to San Sebastian from $398

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to San Sebastian departing on 9/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Philadelphia to San Sebastian

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
8:35 am - 8:40 am
PHL
-
EAS
18h 05m
2 stops
American Airlines Logo
9:20 am - 10:23 pm
EAS
-
PHL
19h 03m
2 stops
$931American Airlines
śr., sie 19 - wt., sie 25
Multiple Airlines Logo
12:52 pm - 1:00 pm
PHL
-
EAS
18h 08m
2 stops
Multiple Airlines Logo
9:30 pm - 5:40 pm
EAS
-
PHL
26h 10m
1 stop
$932Multiple Airlines
śr., sie 19 - wt., sie 25
Iberia Logo
8:20 pm - 8:40 am
PHL
-
EAS
30h 20m
1 stop
Iberia Logo
9:30 pm - 5:40 pm
EAS
-
PHL
26h 10m
1 stop
$937Iberia
śr., sie 19 - wt., sie 25
Iberia Logo
8:15 pm - 8:50 pm
PHL
-
EAS
18h 35m
1 stop
Iberia Logo
9:30 pm - 5:40 pm
EAS
-
PHL
26h 10m
1 stop
$1,049Iberia
wt., lip 21 - wt., lip 28
American Airlines Logo
8:35 am - 8:40 am
PHL
-
EAS
18h 05m
2 stops
American Airlines Logo
9:20 am - 7:55 pm
EAS
-
PHL
16h 35m
2 stops
$1,051American Airlines
śr., sie 26 - śr., wrz 2
Multiple Airlines Logo
10:35 am - 8:40 am
PHL
-
EAS
16h 05m
2 stops
Multiple Airlines Logo
9:30 pm - 5:40 pm
EAS
-
PHL
26h 10m
1 stop
$1,053Multiple Airlines
wt., lip 21 - wt., lip 28
Iberia Logo
8:20 pm - 8:40 am
PHL
-
EAS
30h 20m
1 stop
Iberia Logo
9:30 pm - 5:40 pm
EAS
-
PHL
26h 10m
1 stop
$1,058Iberia
śr., sie 26 - śr., wrz 2
American Airlines Logo
8:20 am - 8:40 am
PHL
-
EAS
18h 20m
2 stops
American Airlines Logo
9:20 am - 9:20 pm
EAS
-
PHL
18h 00m
2 stops
$1,124American Airlines
wt., lip 21 - wt., lip 28
Multiple Airlines Logo
5:40 pm - 8:20 am
PHL
-
EAS
32h 40m
3 stops
Multiple Airlines Logo
5:55 pm - 4:05 pm
EAS
-
PHL
28h 10m
3 stops
$1,244Multiple Airlines
śr., sie 26 - śr., wrz 2
Multiple Airlines Logo
3:25 pm - 8:20 am
PHL
-
EAS
34h 55m
3 stops
Multiple Airlines Logo
5:55 pm - 6:55 pm
EAS
-
PHL
31h 00m
3 stops
$1,380Multiple Airlines
śr., sie 19 - wt., sie 25

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American Airlines flights from Philadelphia to San Sebastian

Our best American Airlines deals on Philadelphia to San Sebastian flight tickets
American Airlines
Aug 19
PHL8:35 amPhiladelphia
18h 05m
2 stops
EAS8:40 amSan Sebastián
Aug 25
EAS9:20 amSan Sebastián
19h 03m
2 stops
PHL10:23 pmPhiladelphia
$931
American Airlines
Aug 26
PHL8:35 amPhiladelphia
18h 05m
2 stops
EAS8:40 amSan Sebastián
Sep 2
EAS9:20 amSan Sebastián
16h 35m
2 stops
PHL7:55 pmPhiladelphia
$1,051
American Airlines
Jul 21
PHL8:20 amPhiladelphia
18h 20m
2 stops
EAS8:40 amSan Sebastián
Jul 28
EAS9:20 amSan Sebastián
18h 00m
2 stops
PHL9:20 pmPhiladelphia
$1,124

Iberia flights from Philadelphia to San Sebastian

Our best Iberia deals on Philadelphia to San Sebastian flight tickets
Iberia
Aug 19
PHL8:20 pmPhiladelphia
30h 20m
1 stop
EAS8:40 amSan Sebastián
Aug 25
EAS9:30 pmSan Sebastián
26h 10m
1 stop
PHL5:40 pmPhiladelphia
$937
Iberia
Jul 21
PHL8:15 pmPhiladelphia
18h 35m
1 stop
EAS8:50 pmSan Sebastián
Jul 28
EAS9:30 pmSan Sebastián
26h 10m
1 stop
PHL5:40 pmPhiladelphia
$1,049
Iberia
Aug 26
PHL8:20 pmPhiladelphia
30h 20m
1 stop
EAS8:40 amSan Sebastián
Sep 2
EAS9:30 pmSan Sebastián
26h 10m
1 stop
PHL5:40 pmPhiladelphia
$1,058

momondo Fare Finder

 
Customize your flight search to find flights from Philadelphia to San Sebastian 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, momondo users made 832,500 searches. Data last updated Czerwiec 8, 2026.
Use the filters below to find and compare flights from Philadelphia to San Sebastian that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaSan Sebastian

PHL - EAS

PHLEAS

Philadelphia

śr. 8/19

8:35 am-8:40 am

2 stops18h 05m

San Sebastián

wt. 8/25

9:20 am-10:23 pm

2 stops19h 03m

$931

PhiladelphiaSan Sebastian

PHL - EAS

PHLEAS

Philadelphia

śr. 8/19

12:52 pm-1:00 pm

2 stops18h 08m

San Sebastián

wt. 8/25

9:30 pm-5:40 pm

1 stop26h 10m

$932

PhiladelphiaSan Sebastian

PHL - EAS

PHLEAS

Philadelphia

śr. 8/19

8:20 pm-8:40 am

1 stop30h 20m

San Sebastián

wt. 8/25

9:30 pm-5:40 pm

1 stop26h 10m

$937

PhiladelphiaSan Sebastian

PHL - EAS

PHLEAS

Philadelphia

wt. 7/21

8:15 pm-8:50 pm

1 stop18h 35m

San Sebastián

wt. 7/28

9:30 pm-5:40 pm

1 stop26h 10m

$1,049
Quickest round-trip

PhiladelphiaSan Sebastian

PHL - EAS

PHLEAS

Philadelphia

śr. 8/26

8:35 am-8:40 am

2 stops18h 05m

San Sebastián

śr. 9/2

9:20 am-7:55 pm

2 stops16h 35m

$1,051

PhiladelphiaSan Sebastian

PHL - EAS

PHLEAS

Philadelphia

wt. 7/21

10:35 am-8:40 am

2 stops16h 05m

San Sebastián

wt. 7/28

9:30 pm-5:40 pm

1 stop26h 10m

$1,053

PhiladelphiaSan Sebastian

PHL - EAS

PHLEAS

Philadelphia

śr. 8/26

8:20 pm-8:40 am

1 stop30h 20m

San Sebastián

śr. 9/2

9:30 pm-5:40 pm

1 stop26h 10m

$1,058

PhiladelphiaSan Sebastian

PHL - EAS

PHLEAS

Philadelphia

wt. 7/21

8:20 am-8:40 am

2 stops18h 20m

San Sebastián

wt. 7/28

9:20 am-9:20 pm

2 stops18h 00m

$1,124

PhiladelphiaSan Sebastian

PHL - EAS

PHLEAS

Philadelphia

śr. 8/26

5:40 pm-8:20 am

3 stops32h 40m

San Sebastián

śr. 9/2

5:55 pm-4:05 pm

3 stops28h 10m

$1,244

PhiladelphiaSan Sebastian

PHL - EAS

PHLEAS

Philadelphia

śr. 8/19

3:25 pm-8:20 am

3 stops34h 55m

San Sebastián

wt. 8/25

5:55 pm-6:55 pm

3 stops31h 00m

$1,380

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Sebastian from

How to get the cheapest flight ticket from Philadelphia 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 cheapest airline that flies from Philadelphia to San Sebastián?

Iberia is the most popular carrier operating from Philadelphia to San Sebastián

What airlines fly to San Sebastian?

Iberia, United Airlines and Air Europa are the top three most popular airlines that fly to San Sebastian from Philadelphia according to our data. Iberia is the first choice among our users, with 40% of people opting to fly with this airline when traveling to San Sebastian. Keep in mind that there are 6 different airlines that fly to San Sebastian on a routine basis, so you have a few additional options to choose from.

When to book flights from Philadelphia to San Sebastian

Are you open to changing your travel dates? Check out the ideal times to fly from Philadelphia to San Sebastian according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Philadelphia to San Sebastian (PHL to EAS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Philadelphia to San Sebastian

Fastest flight time

18h 08m

Direct flights

None
The fastest flight from Philadelphia to San Sebastian takes 18h 08m
There are no direct flights from Philadelphia to San Sebastian. There are no popular flight routes from Philadelphia to San Sebastian.
Search flight deals

Frequently asked questions about flying from Philadelphia to San Sebastian

  • How far is Philadelphia to San Sebastián by plane?

    There are 3658.8 mi between Philadelphia and San Sebastián. 18h 08m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Philadelphia Airport to San Sebastián Airport?

    Prices for flights from Philadelphia Airport to San Sebastián Airport were last updated today.

  • How many operators does momondo search for flights from Philadelphia Airport to San Sebastián Airport?

  • How old do you have to be to fly from Philadelphia Airport to San Sebastián Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Philadelphia Airport to San Sebastián Airport.

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

    The required travel and health documents for your San Sebastián Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Sebastián Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Philadelphia to San Sebastian?

Best airlines flying from Philadelphia to San Sebastian

Compare and see reviews for airlines that fly from Philadelphia to San Sebastian with momondo
Airline
Rating
Free Cancellation
Price
IberiaPriceFrom $947Free CancellationRating
7.0
3,229 reviews
Search Iberia flights

Traveling to a place near San Sebastian?

Book flights to San Sebastian if you plan to visit one of these locations
Irun
Hondarribia

Why use momondo?

Why should I use momondo to find a flight deal from Philadelphia to San Sebastian?

Finding the right flight to San Sebastian from Philadelphia 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 Philadelphia to San Sebastian with flexible booking policies on momondo?

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

How can momondo help me find flights from Philadelphia to San Sebastian?

momondo helps you find the best flight between Philadelphia and San Sebastian by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are not ready to book a flight from Philadelphia to San Sebastian now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to San Sebastian and let you know when they change.

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