What airlines fly to San Sebastian?

United Airlines, Lufthansa and Iberia are the top three most popular airlines that fly to San Sebastian from Colorado according to our data. United Airlines is the first choice among our users, with 51% 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 Colorado to San Sebastián Airport?

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

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

There is 1 operator available for flights from Colorado to San Sebastián Airport as of September 2025.

How old do you have to be to fly from Colorado 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 Colorado 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.

$731 Cheap Flights from Colorado to San Sebastian in 2025/26

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Find the cheapest flights from Colorado to San Sebastian

Round-trip

One-way

Cheap round-trip flights

6:23 am - 8:40 amDEN-EAS

18h 17m2 stops

9:20 am - 10:20 pmEAS-DEN

21h 00m2 stops

$731American Airlines

Find Deal

Wed, Nov 5 - Thu, Dec 4

6:23 am - 8:40 amDEN-EAS

18h 17m2 stops

9:20 am - 10:22 pmEAS-DEN

21h 02m2 stops

$756American Airlines

Find Deal

Mon, Nov 10 - Sun, Nov 16

12:17 am - 8:50 pmDEN-EAS

36h 33m2 stops

9:30 pm - 10:22 pmEAS-DEN

32h 52m2 stops

$951Multiple Airlines

Find Deal

Tue, Nov 4 - Thu, Dec 4

12:17 am - 8:50 pmDEN-EAS

36h 33m2 stops

9:30 pm - 8:17 pmEAS-DEN

30h 47m2 stops

$952Multiple Airlines

Find Deal

Tue, Nov 4 - Thu, Dec 4

12:32 pm - 8:50 pmDEN-EAS

24h 18m2 stops

9:20 am - 10:22 pmEAS-DEN

21h 02m2 stops

$981American Airlines

Find Deal

Fri, Nov 7 - Tue, Nov 11

11:15 am - 1:30 pmDEN-EAS

18h 15m2 stops

2:05 pm - 6:05 pmEAS-DEN

36h 00m3 stops

$1,365Multiple Airlines

Find Deal

Mon, Nov 10 - Sun, Nov 16

11:15 am - 6:05 pmDEN-EAS

22h 50m3 stops

2:05 pm - 6:05 pmEAS-DEN

36h 00m3 stops

$1,607Multiple Airlines

Find Deal

Mon, Nov 10 - Sun, Nov 16

8:00 am - 8:50 pmDEN-EAS

28h 50m2 stops

9:20 am - 7:55 pmEAS-DEN

18h 35m2 stops

$1,913Multiple Airlines

Find Deal

Fri, Nov 21 - Fri, Nov 28

11:15 am - 1:30 pmDEN-EAS

18h 15m2 stops

2:05 pm - 2:35 pmEAS-DEN

32h 30m3 stops

$2,579Multiple Airlines

Find Deal

Wed, Nov 5 - Thu, Dec 4

5:45 pm - 1:30 pmDEN-EAS

35h 45m3 stops

2:05 pm - 2:35 pmEAS-DEN

32h 30m3 stops

$2,775Multiple Airlines

Find Deal

Wed, Nov 5 - Thu, Dec 4

American Airlines flights from Colorado to San Sebastian

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

American Airlines

Nov 5

DEN6:23 amDenver Intl

18h 17m

2 stops

EAS8:40 amSan Sebastián

Dec 4

EAS9:20 amSan Sebastián

21h 00m

2 stops

DEN10:20 pmDenver Intl

$731

Find similar

American Airlines

Nov 10

DEN6:23 amDenver Intl

18h 17m

2 stops

EAS8:40 amSan Sebastián

Nov 16

EAS9:20 amSan Sebastián

21h 02m

2 stops

DEN10:22 pmDenver Intl

$756

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 02m

2 stops

DEN10:22 pmDenver Intl

$981

Find similar

Fly from

Fly to

Route

Depart

Return

Price

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

Wed 11/5

6:23 am-8:40 am

2 stops18h 17m

San Sebastián

Thu 12/4

9:20 am-10:20 pm

2 stops21h 00m

$731

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

Mon 11/10

6:23 am-8:40 am

2 stops18h 17m

San Sebastián

Sun 11/16

9:20 am-10:22 pm

2 stops21h 02m

$756

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

Tue 11/4

12:17 am-8:50 pm

2 stops36h 33m

San Sebastián

Thu 12/4

9:30 pm-10:22 pm

2 stops32h 52m

$951

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

Tue 11/4

12:17 am-8:50 pm

2 stops36h 33m

San Sebastián

Thu 12/4

9:30 pm-8:17 pm

2 stops30h 47m

$952

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-10:22 pm

2 stops21h 02m

$981

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

Mon 11/10

11:15 am-1:30 pm

2 stops18h 15m

San Sebastián

Sun 11/16

2:05 pm-6:05 pm

3 stops36h 00m

$1,365

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

Mon 11/10

11:15 am-6:05 pm

3 stops22h 50m

San Sebastián

Sun 11/16

2:05 pm-6:05 pm

3 stops36h 00m

$1,607

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

Fri 11/21

8:00 am-8:50 pm

2 stops28h 50m

San Sebastián

Fri 11/28

9:20 am-7:55 pm

2 stops18h 35m

$1,913

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

Wed 11/5

11:15 am-1:30 pm

2 stops18h 15m

San Sebastián

Thu 12/4

2:05 pm-2:35 pm

3 stops32h 30m

$2,579

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

Wed 11/5

5:45 pm-1:30 pm

3 stops35h 45m

San Sebastián

Thu 12/4

2:05 pm-2:35 pm

3 stops32h 30m

$2,775

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Colorado 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 Colorado 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 Colorado 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 Colorado 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.

Cheap Colorado to San Sebastian flight deals and tips

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

Direct flights	None

There are no direct flights from Colorado to San Sebastian. There are no popular flight routes from Colorado to San Sebastian.

Search flight deals

When did momondo last update prices for flights from Colorado to San Sebastián Airport?
Prices for flights from Colorado to San Sebastián Airport were last updated today.
How many operators does momondo search for flights from Colorado to San Sebastián Airport?
There is 1 operator available for flights from Colorado to San Sebastián Airport as of September 2025.
How old do you have to be to fly from Colorado 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 Colorado 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.

Best airlines flying from Colorado to San Sebastian

Compare and see reviews for airlines that fly from Colorado to San Sebastian with momondo

Airline	Rating	Free Cancellation	Price
Iberia	PriceFrom $873	Free Cancellation	Rating 7.0 2,938 reviews		Search Iberia flights

Irun

Hondarribia

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Colorado to San Sebastian. momondo saves you time and could save you money on your trip.

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

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

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

Once you have performed a search for Colorado to San Sebastian flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes momondo offers price alerts on flights to San Sebastian from Colorado. 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.