$99 Cheap Flights from Denver (DEN) to Alamosa (ALS)

View $99 flight on Tue, Sep 30, 2025Opens in a new window

Popular airlines from Denver Intl. Airport (DEN) to Alamosa, CO (ALS-San Luis Valley Regional)

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Cheap Flights from Denver to Alamosa (DEN-ALS)

Prices were available within the past 7 days and start at $99 for one-way flights and $198 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

KEY LIME AIR DBA DENVER AIR CONNECTION
Wed, Sep 17 - Fri, Sep 19
DEN
Denver
ALS
Alamosa
$198 Roundtrip, just found
$198
Roundtrip
just found
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Wed, Sep 17 from Denver to Alamosa, returning Fri, Sep 19, priced at $198 just found
KEY LIME AIR DBA DENVER AIR CONNECTION
Wed, Sep 17 - Fri, Sep 19
DEN
Denver
ALS
Alamosa
$203 Roundtrip, just found
$203
Roundtrip
just found
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Wed, Sep 17 from Denver to Alamosa, returning Fri, Sep 19, priced at $203 just found
KEY LIME AIR DBA DENVER AIR CONNECTION
Tue, Sep 16 - Wed, Sep 17
DEN
Denver
ALS
Alamosa
$208 Roundtrip, just found
$208
Roundtrip
just found
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Tue, Sep 16 from Denver to Alamosa, returning Wed, Sep 17, priced at $208 just found
KEY LIME AIR DBA DENVER AIR CONNECTION
Sat, Sep 13 - Mon, Sep 15
DEN
Denver
ALS
Alamosa
$214 Roundtrip, found 1 hour ago
$214
Roundtrip
found 1 hour ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Sat, Sep 13 from Denver to Alamosa, returning Mon, Sep 15, priced at $214 found 1 hour ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Sat, Sep 13 - Sun, Sep 14
DEN
Denver
ALS
Alamosa
$218 Roundtrip, found 1 hour ago
$218
Roundtrip
found 1 hour ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Sat, Sep 13 from Denver to Alamosa, returning Sun, Sep 14, priced at $218 found 1 hour ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Fri, Aug 29 - Sun, Aug 31
DEN
Denver
ALS
Alamosa
$223 Roundtrip, found 5 days ago
$223
Roundtrip
found 5 days ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Fri, Aug 29 from Denver to Alamosa, returning Sun, Aug 31, priced at $223 found 5 days ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Sat, Aug 30 - Sun, Aug 31
DEN
Denver
ALS
Alamosa
$228 Roundtrip, found 3 days ago
$228
Roundtrip
found 3 days ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Sat, Aug 30 from Denver to Alamosa, returning Sun, Aug 31, priced at $228 found 3 days ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Thu, Aug 21 - Thu, Aug 28
DEN
Denver
ALS
Alamosa
$233 Roundtrip, found 1 hour ago
$233
Roundtrip
found 1 hour ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Thu, Aug 21 from Denver to Alamosa, returning Thu, Aug 28, priced at $233 found 1 hour ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Fri, Aug 15 - Mon, Aug 18
DEN
Denver
ALS
Alamosa
$238 Roundtrip, found 5 hours ago
$238
Roundtrip
found 5 hours ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Fri, Aug 15 from Denver to Alamosa, returning Mon, Aug 18, priced at $238 found 5 hours ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Wed, Aug 20 - Mon, Aug 25
DEN
Denver
ALS
Alamosa
$243 Roundtrip, just found
$243
Roundtrip
just found
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Wed, Aug 20 from Denver to Alamosa, returning Mon, Aug 25, priced at $243 just found
KEY LIME AIR DBA DENVER AIR CONNECTION
Sat, Aug 16 - Tue, Aug 26
DEN
Denver
ALS
Alamosa
$248 Roundtrip, found 14 hours ago
$248
Roundtrip
found 14 hours ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Sat, Aug 16 from Denver to Alamosa, returning Tue, Aug 26, priced at $248 found 14 hours ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Sat, Aug 16 - Thu, Aug 21
DEN
Denver
ALS
Alamosa
$253 Roundtrip, found 3 hours ago
$253
Roundtrip
found 3 hours ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Sat, Aug 16 from Denver to Alamosa, returning Thu, Aug 21, priced at $253 found 3 hours ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Sat, Aug 16 - Sun, Aug 31
DEN
Denver
ALS
Alamosa
$258 Roundtrip, found 14 hours ago
$258
Roundtrip
found 14 hours ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Sat, Aug 16 from Denver to Alamosa, returning Sun, Aug 31, priced at $258 found 14 hours ago

Find the cheapest month to fly from Denver (DEN) to Alamosa (ALS)

February is typically the cheapest month to fly

From $158 - $218 per traveler.

Graph displaying average flight prices per month

Alternative airports near Alamosa

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to San Luis Valley Regional ALS. Cheapest and Closest option available. Average driving time to city center is 4 minutes. Flights from $214
ALS
San Luis Valley Regional
CheapestClosest
Average driving time to city center4 min
Flights from $214
0
Flights from Denver (DEN) to Alamosa (ALS)
Origin airport
Denver Intl.
Destination airport
San Luis Valley Regional
Airlines serving
KEY LIME AIR DBA DENVER AIR CONNECTION
Roundtrip price
$192
Distance
178 mi

Denver to Alamosa Flights

The cheapest times to fly from Denver to Alamosa

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Denver to Alamosa are during the month of September. You can find some of the cheapest flights from Denver to Alamosa with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Denver to Alamosa

Sunday is one of the best days to book for cheap flights from Denver to Alamosa: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Denver to Alamosa

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Denver to Alamosa in 2025. You can also book with separate airlines for your outbound and return journeys, from $99 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Denver to Alamosa flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Denver to Alamosa airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Denver Intl. Airport (DEN) to San Luis Valley Regional Airport (ALS) cost?
Lock in a cheap one-way flight from $99 or cheap return flight from $198 from Denver Intl. Airport (DEN) to San Luis Valley Regional Airport (ALS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Denver Intl. Airport (DEN) to San Luis Valley Regional Airport (ALS)?
September is the most affordable month to fly from DEN to ALS. Traveling during an off-peak travel window is often the key to scoring lower fares.
Which airlines fly direct from Denver Intl. Airport (DEN) to San Luis Valley Regional Airport (ALS)?
Fly nonstop from Denver Intl. Airport (DEN) to San Luis Valley Regional Airport (ALS) on a Denver Air Connection flight.
What is the cheapest airline that flies from Denver Intl. Airport (DEN) to San Luis Valley Regional Airport (ALS)?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll fly you from DEN to ALS. Then, sort your results by "Price (lowest to highest)" to snag a great deal.
How many flights per day from Denver Intl. Airport (DEN) to San Luis Valley Regional Airport (ALS)?
On average, Denver Intl. Airport (DEN) only has 1 direct flight to San Luis Valley Regional Airport (ALS) every day. For additional options, try Expedia's easy-to-use filters. Simply enter your details, then choose "1 Stop" or "2+ Stops" to discover flights offering layovers.
What are the most popular departure times for flights from Denver Intl. Airport (DEN) to San Luis Valley Regional Airport (ALS)?
Flights between DEN and ALS are their busiest at 2 PM. If you want a less crowded experience and potentially cheaper prices, choose a departure outside the usual busy windows.
What day of the week has the most flights from DEN to ALS?
Monday offers the most flights from Denver Intl. Airport (DEN) to San Luis Valley Regional Airport (ALS). Consider jetting off on this day and you'll have the best chance of finding a departure that works with your plans.
What is the earliest flight from Denver Intl. Airport (DEN) to San Luis Valley Regional Airport (ALS)?
Denver Intl. Airport (DEN)'s earliest flight to San Luis Valley Regional Airport (ALS) takes off at approximately 2:10PM UTC-7. With a flight time of 50m, you'll land at around 3:00PM UTC-7.
How long does it take to fly from Denver Intl. Airport (DEN) to San Luis Valley Regional Airport (ALS)?
Flights from DEN to ALS have an average travel time of 51 minutes. The distance between the two is 180 mi.
What airline has the least delays from DEN to ALS?
With 80% of flights usually landing on time, United Airlines has the best on-time performance for nonstop flights from Denver Intl. Airport (DEN) to San Luis Valley Regional Airport (ALS). To check your flight status and receive notifications if anything changes, simply head to the Expedia App.
What is the best time to fly from Denver Intl. Airport (DEN) to San Luis Valley Regional Airport (ALS)?
To arrive at San Luis Valley Regional Airport (ALS) without delays, opt for a flight that leaves Denver Intl. Airport (DEN) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Alamosa from Denver Intl. Airport (DEN)?
Check out your flight options from Denver Intl. Airport (DEN) to San Luis Valley Regional Airport (ALS). This is the only airport in Alamosa you can fly into if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Denver Intl. Airport (DEN) to San Luis Valley Regional Airport (ALS) last-minute?
Last-minute fares from DEN to ALS are typically more expensive. To lock in the best rates, start looking for flights well in advance. That being said, if you're flexible with your travel dates, it's possible to score a cheap fare right before your trip.
Is it cheaper to book a DEN to ALS flight and hotel package?
You'll generally save money by booking a DEN to ALS flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one place. Once you've chosen your ideal accommodations and flights, you can add extras like activities, car rentals and tours.
Can I cancel or change the date of my flight from Denver Intl. Airport (DEN) to San Luis Valley Regional Airport (ALS)?
Usually, it's possible to cancel or reschedule your DEN to ALS flight. However, if it's been more than 24 hours since booking, additional charges may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.