$446+ Cheap flights from Colorado to San Sebastian (EAS)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — EAS
Feb 11 — Feb 181
1 adult, Economy
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Find cheap flights from Colorado to San Sebastian with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.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 January 12, 2026.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $638 (American Airlines) |
One-way from | $446 (Kiwi.com) |
Find flight deals from Colorado to San Sebastian
Cheapest flights from Colorado to San SebastianExplore 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 January 12, 2026.
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 January 12, 2026.
This American Airlines deal was found by Cheapflights users on 1/12. 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 2/269:10 am
DEN
- EAS
2 stops19h 50m
American Airlines
Thu 3/59:20 am
EAS
- DEN
2 stops21h 20m
American Airlines
Deal found 1/12![American Airlines logo]()
$638
This Expedia deal was found by Cheapflights users on 1/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/29:09 am
DEN
- EAS
2 stops39h 31m
Iberia
Wed 6/179:30 pm
EAS
- DEN
2 stops27h 00m
Iberia
Deal found 1/11![Iberia logo]()
$1,078
This Iberia deal was found by Cheapflights users on 1/10. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/185:25 pm
DEN
- EAS
2 stops19h 25m
Iberia
Sun 2/229:30 pm
EAS
- DEN
2 stops26h 00m
Iberia
Deal found 1/10![Iberia logo]()
$1,560
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 January 12, 2026.
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
Thu 2/26
9:10 am-1:00 pm
2 stops19h 50m
San Sebastián
Thu 3/5
9:20 am-10:40 pm
2 stops21h 20m
$638
DenverSan Sebastian
DEN - EAS
DENEAS
Denver Intl
Tue 6/2
9:09 am-8:40 am
2 stops39h 31m
San Sebastián
Wed 6/17
9:30 pm-4:30 pm
2 stops27h 00m
$1,078
DenverSan Sebastian
DEN - EAS
DENEAS
Denver Intl
Wed 2/18
5:25 pm-8:50 pm
2 stops19h 25m
San Sebastián
Sun 2/22
9:30 pm-3:30 pm
2 stops26h 00m
$1,560
DenverSan Sebastian
DEN - EAS
DENEAS
Denver Intl
Tue 6/2
12:15 pm-8:35 am
2 stops36h 20m
$446
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
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