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$729+ Cheap flights from Colorado to San Sebastian (EAS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/18. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — EAS
Nov 13 — Nov 201
Thu 11/13
Thu 11/20
1 adult, Economy
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Cheap flight deals from Colorado to San Sebastian

Keep the following information in mind while searching for Colorado to San Sebastian flight deals. Data was last updated October 14, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$729
(Expedia)
Provider with most accurate pricing for Denver Intl-San Sebastián flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-San Sebastián flights.
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From Colorado to San Sebastián
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Find flight deals from Colorado to San Sebastian

Cheapest flights from Colorado to San Sebastian
Explore the most affordable flight options available from Colorado to San Sebastian. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 14, 2025.

This American Airlines deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/276:00 amDEN - EAS
2 stops18h 40mAmerican Airlines
Thu 12/49:20 amEAS - DEN
2 stops21h 00mAmerican Airlines
Deal found 10/12$781
This American Airlines deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/77:22 amDEN - EAS
2 stops29h 28mAmerican Airlines
Tue 11/111:40 pmEAS - DEN
2 stops30h 21mAmerican Airlines
Deal found 10/11$990
This Mytrip deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2711:15 amDEN - EAS
2 stops18h 15mMultiple Airlines
Thu 12/42:05 pmEAS - DEN
3 stops32h 30mMultiple Airlines
Deal found 10/12$1,728

Cheapflights Fare Finder

 
Customize your flight search to find flights from Colorado 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, Cheapflights users made 2,558,603 searches. Data last updated October 14, 2025.
Use the filters below to find and compare flights from Colorado to San Sebastian that are best for you.

Fly from

Colorado

Fly to

San Sebastian

Route

Depart

Return

Price

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

Sun 1/18

5:25 pm-8:40 am

2 stops31h 15m

San Sebastián

Sat 1/24

9:30 pm-8:53 pm

2 stops31h 23m

$729

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

Thu 11/27

6:00 am-8:40 am

2 stops18h 40m

San Sebastián

Thu 12/4

9:20 am-10:20 pm

2 stops21h 00m

$781

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

Fri 11/7

7:22 am-8:50 pm

2 stops29h 28m

San Sebastián

Tue 11/11

1:40 pm-12:01 pm

2 stops30h 21m

$990

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

Thu 11/27

11:15 am-1:30 pm

2 stops18h 15m

San Sebastián

Thu 12/4

2:05 pm-2:35 pm

3 stops32h 30m

$1,728

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/12

Best time to book a flight from Colorado to San Sebastian

Have a flexible travel schedule? Discover the best time to fly to San Sebastian from Colorado with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Colorado to San Sebastian

What is the cheapest month to book a flight from Colorado to San Sebastian?

Currently, February is the cheapest month in which you can book a flight from Colorado to San Sebastian (average of $530). Flying from Colorado to San Sebastian in December is currently the most expensive (average of $1,244). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from CO to EAS?

Find hourly flight availability from Colorado to San Sebastian. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 14, 2025.

A simple way to save on the total cost of your ticket is to fly from Colorado to San Sebastian in the afternoon. If you’re flexible enough to do this you can expect to save up to 44% on your trip compared to booking a flight in the morning.

Related info for your journey

Find useful and relevant information for your journey from Colorado to San Sebastian. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to San Sebastian from Colorado?

    Most people fly into San Sebastián (EAS) if they book a flight to San Sebastian from Colorado. San Sebastián is conveniently located just 9.7 mi from San Sebastian’s city center.

  • How long is the flight from Colorado to San Sebastian?

    There are many flights that can get you from Colorado to San Sebastian in 18h 40m. Fly via Iberia or American Airlines to get the fastest option. There are 4944 mi between Colorado and San Sebastian. This flight may include one or multiple stops.

  • Can I find deals for flights from Colorado to San Sebastian that include hotel bookings?

    Yes. In addition to deals on Colorado to San Sebastian flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Colorado to San Sebastian?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Colorado to San Sebastian.

  • Can I find deals for business class flights from Colorado to San Sebastian?

    Yes. Cheapflights offers flight deals from Colorado to San Sebastian by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Colorado to San Sebastian?

    Currently, February is the cheapest month in which you can book a flight from Colorado to San Sebastian (average of $530). Flying from Colorado to San Sebastian in December is currently the most expensive (average of $1,244). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Colorado to San Sebastian

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Colorado to San Sebastian

Discover the top airline that operate flights from Colorado to San Sebastian. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$873Average$1,467FlexibilityNo cancel feeOn-time77%

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