What airlines fly to San Sebastian?

United Airlines, Lufthansa and Iberia are the top three most popular airlines that fly to San Sebastian from Denver according to our data. United Airlines is the first choice among our users, with 47% of people opting to fly with this airline when traveling to San Sebastian. Keep in mind that there are 3 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 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?

The number of operators available for flights from Denver Intl Airport to San Sebastián Airport is 1 as of November 2025.

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.

$1,027 Cheap Flights from Denver to San Sebastian in 2025/26

1 adult

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Find the cheapest flights from Denver to San Sebastian

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Cheap round-trip flights

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6:40 pm - 8:40 amDEN-EAS

30h 00m2 stops

1:40 pm - 11:35 pmEAS-DEN

17h 55m2 stops

$1,032Iberia

Find Deal

Tue, Apr 14 - Tue, Apr 21

5:25 pm - 8:50 pmDEN-EAS

19h 25m2 stops

9:20 am - 10:27 pmEAS-DEN

21h 07m2 stops

$1,217American Airlines

Find Deal

Fri, Jan 9 - Wed, Jul 8

6:40 pm - 8:40 amDEN-EAS

30h 00m3 stops

5:55 pm - 4:35 pmEAS-DEN

30h 40m2 stops

$1,296Multiple Airlines

Find Deal

Tue, Apr 14 - Tue, Apr 21

1:00 am - 8:40 amDEN-EAS

47h 40m2 stops

1:40 pm - 8:15 amEAS-DEN

26h 35m2 stops

$1,405Multiple Airlines

Find Deal

Mon, Apr 13 - Tue, Apr 21

11:05 am - 5:20 pmDEN-EAS

22h 15m3 stops

5:55 pm - 3:35 pmEAS-DEN

29h 40m3 stops

$1,605Multiple Airlines

Find Deal

Tue, Apr 14 - Tue, Apr 21

Iberia flights from Denver to San Sebastian

Our best Iberia deals on Denver to San Sebastian flight tickets

Iberia

Apr 14

DEN6:40 pmDenver Intl

30h 00m

2 stops

EAS8:40 amSan Sebastián

Apr 21

EAS1:40 pmSan Sebastián

17h 55m

2 stops

DEN11:35 pmDenver Intl

$1,032

Find similar

Iberia

Nov 14

DEN10:24 amDenver Intl

18h 36m

2 stops

EAS1:00 pmSan Sebastián

Nov 18

EAS9:30 pmSan Sebastián

26h 00m

2 stops

DEN3:30 pmDenver Intl

$2,033

Find similar

American Airlines flights from Denver to San Sebastian

Our best American Airlines deals on Denver to San Sebastian flight tickets

American Airlines

Jan 9

DEN5:25 pmDenver Intl

19h 25m

2 stops

EAS8:50 pmSan Sebastián

Jul 8

EAS9:20 amSan Sebastián

21h 07m

2 stops

DEN10:27 pmDenver Intl

$1,217

Find similar

American Airlines

Nov 14

DEN11:59 pmDenver Intl

24h 41m

2 stops

EAS8:40 amSan Sebastián

Nov 18

EAS1:40 pmSan Sebastián

40h 42m

2 stops

DEN10:22 pmDenver Intl

$2,111

Find similar

Fly from

Fly to

Route

Depart

Return

Price

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

Tue 4/14

6:40 pm-8:40 am

2 stops30h 00m

San Sebastián

Tue 4/21

1:40 pm-11:35 pm

2 stops17h 55m

$1,032

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

Fri 1/9

5:25 pm-8:50 pm

2 stops19h 25m

San Sebastián

Wed 7/8

9:20 am-10:27 pm

2 stops21h 07m

$1,217

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

Tue 4/14

6:40 pm-8:40 am

3 stops30h 00m

San Sebastián

Tue 4/21

5:55 pm-4:35 pm

2 stops30h 40m

$1,296

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

Mon 4/13

1:00 am-8:40 am

2 stops47h 40m

San Sebastián

Tue 4/21

1:40 pm-8:15 am

2 stops26h 35m

$1,405

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

Tue 4/14

11:05 am-5:20 pm

3 stops22h 15m

San Sebastián

Tue 4/21

5:55 pm-3:35 pm

3 stops29h 40m

$1,605

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

Prices

Airlines

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 19h 25m, 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?
The number of operators available for flights from Denver Intl Airport to San Sebastián Airport is 1 as of November 2025.
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?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Denver to San Sebastian is Iberia (100% of total bookings).

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
Iberia	PriceFrom $873	Free Cancellation	Rating 7.0 3,007 reviews		Search Iberia flights

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.