A steel bridge over a frozen river in a snowy landscape.

Cheap Flights to Costilla County from $137

View $137 flight on Wed, Aug 26, 2026Opens in a new window

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Popular airlines to Costilla County

  • Denver Air Connection

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How much is the cheapest flight to Costilla County?

Prices were available within the past 7 days and start at $137 for one-way flights and $269 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

KEY LIME AIR DBA DENVER AIR CONNECTION
Sat, Sep 5 - Sat, Sep 12
DEN
Denver
ALS
Alamosa
$274 Roundtrip, just found
$274
Roundtrip
just found
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Sat, Sep 5 from Denver to Alamosa, returning Sat, Sep 12, priced at $274 just found
KEY LIME AIR DBA DENVER AIR CONNECTION
Sat, Aug 8 - Wed, Aug 12
DEN
Denver
ALS
Alamosa
$284 Roundtrip, found 2 hours ago
$284
Roundtrip
found 2 hours ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Sat, Aug 8 from Denver to Alamosa, returning Wed, Aug 12, priced at $284 found 2 hours ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Fri, Aug 7 - Sun, Aug 9
DEN
Denver
ALS
Alamosa
$294 Roundtrip, found 6 hours ago
$294
Roundtrip
found 6 hours ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Fri, Aug 7 from Denver to Alamosa, returning Sun, Aug 9, priced at $294 found 6 hours ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Sun, Aug 2 - Tue, Aug 4
DEN
Denver
ALS
Alamosa
$299 Roundtrip, found 1 hour ago
$299
Roundtrip
found 1 hour ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Sun, Aug 2 from Denver to Alamosa, returning Tue, Aug 4, priced at $299 found 1 hour ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Fri, Jul 24 - Mon, Jul 27
DEN
Denver
ALS
Alamosa
$304 Roundtrip, found 1 hour ago
$304
Roundtrip
found 1 hour ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Fri, Jul 24 from Denver to Alamosa, returning Mon, Jul 27, priced at $304 found 1 hour ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Wed, Jul 22 - Tue, Jul 28
DEN
Denver
ALS
Alamosa
$309 Roundtrip, found 18 hours ago
$309
Roundtrip
found 18 hours ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Wed, Jul 22 from Denver to Alamosa, returning Tue, Jul 28, priced at $309 found 18 hours ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Thu, Jul 23 - Fri, Jul 24
DEN
Denver
ALS
Alamosa
$319 Roundtrip, found 16 hours ago
$319
Roundtrip
found 16 hours ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Thu, Jul 23 from Denver to Alamosa, returning Fri, Jul 24, priced at $319 found 16 hours ago
United
Fri, Oct 23 - Wed, Oct 28
AUS
Austin
ALS
Alamosa
$444 Roundtrip, found 4 days ago
$444
Roundtrip
found 4 days ago
Select United flight, departing Fri, Oct 23 from Austin to Alamosa, returning Wed, Oct 28, priced at $444 found 4 days ago
Delta
Mon, Aug 31 - Thu, Sep 3
DAL
Dallas
ALS
Alamosa
$571 Roundtrip, found 6 days ago
$571
Roundtrip
found 6 days ago
Select Delta flight, departing Mon, Aug 31 from Dallas to Alamosa, returning Thu, Sep 3, priced at $571 found 6 days ago
American Airlines
Sat, Sep 12 - Sat, Sep 19
BMI
Bloomington
ALS
Alamosa
$629 Roundtrip, found 1 day ago
$629
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Sep 12 from Bloomington to Alamosa, returning Sat, Sep 19, priced at $629 found 1 day ago

Trending flights to Costilla County

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

KEY LIME AIR DBA DENVER AIR CONNECTION
Thu, Oct 8 - Thu, Oct 8
DEN
Denver
ALS
Alamosa
$269 Roundtrip, found 1 day ago
$269
Roundtrip
found 1 day ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Thu, Oct 8 from Denver to Alamosa, returning Thu, Oct 8, priced at $269 found 1 day ago

Frequently asked questions

How do I find cheap flights to Costilla County that have flexible change policies?
At Expedia, we've been channeling our inner acrobat to provide you with the most flexible airfares around town. Just click on "No change fee" under the "Flexible change policies" subheading to find your ideal flight to Costilla County.
Which airlines fly to Costilla County?
With a good selection of airlines offering flights into or near Costilla County, you have plenty of options:

  • United Airlines - 390 flights to or near Costilla County each month, including 390 flights to Colorado Springs Airport (COS) per month.
  • Southwest Airlines - 264 flights to or near Costilla County each month, including 264 flights to Colorado Springs Airport (COS) per month.
  • American Airlines - 151 flights to or near Costilla County each month, including 151 flights to Colorado Springs Airport (COS) per month.

How can I find cheap tickets to Costilla County?
An useful strategy for getting your hands on cheap tickets is to be flexible with your dates. Begin with searching for your flight to Costilla County, then click on the "flexible dates" box to compare prices for nearby days. Another useful tip? Book well in advance. For an idea of costs, $269 was the lowest price for a flight to Costilla County in the last seven days.
How much is a flight to Costilla County?
In the last seven days, round-trip tickets to Costilla County sold for as little as $269 and reached a maximum of $629. For one-way journeys departing from Denver (DEN), the lowest amount paid during this time was $137.
What are the most popular airports to fly into in Costilla County?
The main gateway to Costilla County, roughly 889 flights land at Colorado Springs Airport (COS) every month. Look for a rewarding deal, lock in your fare and prepare to experience this sensational region.
When is the cheapest time to fly to Costilla County?
Consider traveling earlier in the week to bag the best airfare to Costilla County. Tuesday is usually the cheapest day to take off, with Monday a close second. Saturday typically has the most expensive prices. This is because a lot of people prefer to begin their getaway on a weekend.
How much is a plane ticket to Costilla County?
Plane fares varied from $269 to $629 over the last seven days. When you're ready to book, we're here to help grab the best price to Costilla County.
What months are the cheapest to book a flight to Costilla County?
To secure a fabulous deal to Costilla County, book during February when the price of airfares are at their lowest. The most expensive time to book? In the United States, it's the month of December.
How long is a flight to Costilla County?
Whether or not you'll have time for a movie marathon depends on where you're traveling from. To give you a rough idea, here are the average flight times for three well-known domestic routes to Costilla County:

  • Denver, CO (DEN-Denver Intl.) to Colorado Springs Airport (COS) - 49 minutes
  • Dallas, TX (DFW-Dallas-Fort Worth Intl.) to Colorado Springs Airport (COS) - 2 hours
  • Houston, TX (IAH-George Bush Intercontinental) to Colorado Springs Airport (COS) - 2 hours and 33 minutes

What is the best time to go to Costilla County?
If you'd love to experience Costilla County's most populous city when it's buzzing with activity, set off for San Luis sometime during May, June and July. Like most locations in the Northern Hemisphere, summer here begins June 20, with average temperatures of between 50ºF and 75ºF.

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Travel information

*Flight schedules are subject to change.

*Available to One Key members.

 

*Flight schedules are subject to change.

*Available to One Key members.