Costilla County, Colorado - February 21, 2019: An 1892 wrought iron bridge spanning the Rio Grande in winter with snow, ice, blue sky, clouds. Built by the Wrought Iron Bridge Co. of Canton, Ohio.

Cheap Flights to Costilla County from $137

View $137 flight on Tue, Aug 18, 2026Opens in a new window

Popular airlines to Costilla County

  • Denver Air Connection

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 30% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

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, Jul 11 - Tue, Jul 14
DEN
Denver
ALS
Alamosa
$274 Roundtrip, just found
$274
Roundtrip
just found
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Sat, Jul 11 from Denver to Alamosa, returning Tue, Jul 14, priced at $274 just found
KEY LIME AIR DBA DENVER AIR CONNECTION
Fri, Jun 26 - Fri, Jul 3
DEN
Denver
ALS
Alamosa
$284 Roundtrip, just found
$284
Roundtrip
just found
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Fri, Jun 26 from Denver to Alamosa, returning Fri, Jul 3, priced at $284 just found
KEY LIME AIR DBA DENVER AIR CONNECTION
Wed, Jun 24 - Thu, Jul 23
DEN
Denver
ALS
Alamosa
$289 Roundtrip, found 1 hour ago
$289
Roundtrip
found 1 hour ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Wed, Jun 24 from Denver to Alamosa, returning Thu, Jul 23, priced at $289 found 1 hour ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Sun, Jun 28 - Thu, Jul 2
DEN
Denver
ALS
Alamosa
$294 Roundtrip, found 3 hours ago
$294
Roundtrip
found 3 hours ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Sun, Jun 28 from Denver to Alamosa, returning Thu, Jul 2, priced at $294 found 3 hours ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Thu, Jun 25 - Tue, Jun 30
DEN
Denver
ALS
Alamosa
$299 Roundtrip, found 7 hours ago
$299
Roundtrip
found 7 hours ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Thu, Jun 25 from Denver to Alamosa, returning Tue, Jun 30, priced at $299 found 7 hours ago
United
Sat, Aug 15 - Wed, Aug 19
DFW
Dallas
ALS
Alamosa
$467 Roundtrip, found 2 days ago
$467
Roundtrip
found 2 days ago
Select United flight, departing Sat, Aug 15 from Dallas to Alamosa, returning Wed, Aug 19, priced at $467 found 2 days ago
United
Wed, Aug 26 - Sat, Aug 29
PHX
Phoenix
ALS
Alamosa
$474 Roundtrip, found 4 days ago
$474
Roundtrip
found 4 days ago
Select United flight, departing Wed, Aug 26 from Phoenix to Alamosa, returning Sat, Aug 29, priced at $474 found 4 days ago
United
Mon, Nov 16 - Thu, Nov 19
SAN
San Diego
ALS
Alamosa
$499 Roundtrip, found 3 days ago
$499
Roundtrip
found 3 days ago
Select United flight, departing Mon, Nov 16 from San Diego to Alamosa, returning Thu, Nov 19, priced at $499 found 3 days ago
American Airlines
Fri, Jul 17 - Tue, Jul 21
ORD
Chicago
ALS
Alamosa
$543 Roundtrip, found 3 days ago
$543
Roundtrip
found 3 days ago
Select American Airlines flight, departing Fri, Jul 17 from Chicago to Alamosa, returning Tue, Jul 21, priced at $543 found 3 days ago
Delta
Thu, Nov 5 - Mon, Nov 16
SFO
San Francisco
ALS
Alamosa
$565 Roundtrip, found 2 days ago
$565
Roundtrip
found 2 days ago
Select Delta flight, departing Thu, Nov 5 from San Francisco to Alamosa, returning Mon, Nov 16, priced at $565 found 2 days 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
Mon, Oct 19 - Mon, Oct 19
DEN
Denver
ALS
Alamosa
$269 Roundtrip, found 4 hours ago
$269
Roundtrip
found 4 hours ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Mon, Oct 19 from Denver to Alamosa, returning Mon, Oct 19, priced at $269 found 4 hours 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 $565. 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 $565 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.

Book with confidence

Enjoy extra legroom, flight flexibility, and a seamless travel experience.

Travel information

*Flight schedules are subject to change.

*Available to One Key members.

 

*Flight schedules are subject to change.

*Available to One Key members.