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Cheap flights from Denver to San Sebastian from $368

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Denver to San Sebastian departing on 10/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

American Airlines Logo
7:13 am - 8:40 amDEN-EAS
17h 27m2 stops
American Airlines Logo
9:30 pm - 1:36 pmEAS-DEN
24h 06m2 stops
$671American Airlines
Find Deal
Wed, Feb 4 - Wed, Feb 11
American Airlines Logo
12:32 pm - 8:50 pmDEN-EAS
24h 18m2 stops
American Airlines Logo
9:20 am - 11:17 pmEAS-DEN
21h 57m2 stops
$881American Airlines
Find Deal
Fri, Nov 7 - Tue, Nov 11
American Airlines Logo
12:32 pm - 8:50 pmDEN-EAS
24h 18m2 stops
American Airlines Logo
1:40 pm - 12:01 pmEAS-DEN
30h 21m2 stops
$890American Airlines
Find Deal
Fri, Nov 7 - Tue, Nov 11

American Airlines flights from Denver to San Sebastian

Our best American Airlines deals on Denver to San Sebastian flight tickets
American Airlines
Feb 4
DEN7:13 amDenver Intl
17h 27m
2 stops
EAS8:40 amSan Sebastián
Feb 11
EAS9:30 pmSan Sebastián
24h 06m
2 stops
DEN1:36 pmDenver Intl
$671
Find similar
American Airlines
Nov 7
DEN12:32 pmDenver Intl
24h 18m
2 stops
EAS8:50 pmSan Sebastián
Nov 11
EAS9:20 amSan Sebastián
21h 57m
2 stops
DEN11:17 pmDenver Intl
$881
Find similar
American Airlines
Nov 7
DEN12:32 pmDenver Intl
24h 18m
2 stops
EAS8:50 pmSan Sebastián
Nov 11
EAS1:40 pmSan Sebastián
30h 21m
2 stops
DEN12:01 pmDenver Intl
$890
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Denver 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 September 17, 2025.
Use the filters below to find and compare flights from Denver to San Sebastian that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

Wed 2/4

7:13 am-8:40 am

2 stops17h 27m

San Sebastián

Wed 2/11

9:30 pm-1:36 pm

2 stops24h 06m

$671

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

Fri 11/7

12:32 pm-8:50 pm

2 stops24h 18m

San Sebastián

Tue 11/11

9:20 am-11:17 pm

2 stops21h 57m

$881

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

Fri 11/7

12:32 pm-8:50 pm

2 stops24h 18m

San Sebastián

Tue 11/11

1:40 pm-12:01 pm

2 stops30h 21m

$890

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

Wed 10/15

6:10 am-8:40 am

3 stops42h 30m

$368

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

Wed 10/15

7:55 pm-10:35 am

2 stops30h 40m

$518

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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How to get the cheapest flight ticket from Denver 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 day to depart on your flight to San Sebastian?

On average, the least expensive day to fly to San Sebastian from Denver is on a Saturday. momondo users have found tickets for Saturday departures for as low as $1,183. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Denver to San Sebastian for around $2,865.

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

Flying to San Sebastian from Denver in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $1,157 when looking at flights departing in the afternoon. Flights to San Sebastian are more costly in the morning, with an average ticket price of $1,572. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

When to book flights from Denver to San Sebastian

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

Cheap Denver to San Sebastian (DEN to EAS) flight deals and tips

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

Direct flights

None
There are no direct flights from Denver to San Sebastian. There are no popular flight routes from Denver to San Sebastian.
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  • How far is Denver Intl to San Sebastián by plane?

    A flight from Denver Intl to San Sebastián will travel around 4956.4 mi. Flights usually cover this in 17h 27m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from Denver Intl Airport to San Sebastián Airport are refreshed on a daily basis.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Denver Intl 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 Denver to San Sebastian?

Best airlines flying from Denver to San Sebastian

Compare and see reviews for airlines that fly from Denver to San Sebastian with momondo
Airline
Rating
Free Cancellation
Price
IberiaPriceFrom $873Free CancellationRating
7.0
2,925 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 Denver to San Sebastian?

It is quick and easy to find Denver to San Sebastian flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to San Sebastian that suits you.

Can I find flights from Denver to San Sebastian with flexible booking policies on momondo?

Flights from Denver to San Sebastian with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

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

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

Price alerts on flights to San Sebastian from Denver are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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