$228 Cheap Flights from Alamosa (ALS) to Phoenix (PHX)

View $228 flight on Fri, Apr 17, 2026Opens in a new window

Popular airlines from Alamosa, CO (ALS-San Luis Valley Regional) to Phoenix Sky Harbor Intl. Airport (PHX)

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Cheap Flights from Alamosa to Phoenix (ALS-PHX)

Prices were available within the past 7 days and start at $228 for one-way flights and $456 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

KEY LIME AIR DBA DENVER AIR CONNECTION
Tue, May 19 - Wed, May 20
ALS
Alamosa
PHX
Phoenix
$456 Roundtrip, found 4 days ago
$456
Roundtrip
found 4 days ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Tue, May 19 from Alamosa to Phoenix, returning Wed, May 20, priced at $456 found 4 days ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Tue, May 19 - Wed, May 20
ALS
Alamosa
PHX
Phoenix
$463 Roundtrip, found 4 days ago
$463
Roundtrip
found 4 days ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Tue, May 19 from Alamosa to Phoenix, returning Wed, May 20, priced at $463 found 4 days ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Fri, Apr 17 - Sun, Apr 19
ALS
Alamosa
PHX
Phoenix
$486 Roundtrip, found 5 days ago
$486
Roundtrip
found 5 days ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Fri, Apr 17 from Alamosa to Phoenix, returning Sun, Apr 19, priced at $486 found 5 days ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Tue, May 19 - Wed, May 20
ALS
Alamosa
PHX
Phoenix
$490 Roundtrip, found 4 days ago
$490
Roundtrip
found 4 days ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Tue, May 19 from Alamosa to Phoenix, returning Wed, May 20, priced at $490 found 4 days ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Tue, May 19 - Wed, May 20
ALS
Alamosa
PHX
Phoenix
$493 Roundtrip, found 1 day ago
$493
Roundtrip
found 1 day ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Tue, May 19 from Alamosa to Phoenix, returning Wed, May 20, priced at $493 found 1 day ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Tue, May 19 - Wed, May 20
ALS
Alamosa
PHX
Phoenix
$505 Roundtrip, found 4 days ago
$505
Roundtrip
found 4 days ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Tue, May 19 from Alamosa to Phoenix, returning Wed, May 20, priced at $505 found 4 days ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Fri, Apr 17 - Sun, Apr 19
ALS
Alamosa
PHX
Phoenix
$511 Roundtrip, found 5 days ago
$511
Roundtrip
found 5 days ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Fri, Apr 17 from Alamosa to Phoenix, returning Sun, Apr 19, priced at $511 found 5 days ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Tue, May 19 - Wed, May 20
ALS
Alamosa
PHX
Phoenix
$513 Roundtrip, found 1 day ago
$513
Roundtrip
found 1 day ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Tue, May 19 from Alamosa to Phoenix, returning Wed, May 20, priced at $513 found 1 day ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Thu, May 14 - Sun, May 17
ALS
Alamosa
PHX
Phoenix
$516 Roundtrip, found 2 days ago
$516
Roundtrip
found 2 days ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Thu, May 14 from Alamosa to Phoenix, returning Sun, May 17, priced at $516 found 2 days ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Fri, Apr 17 - Sun, Apr 19
ALS
Alamosa
PHX
Phoenix
$517 Roundtrip, found 5 days ago
$517
Roundtrip
found 5 days ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Fri, Apr 17 from Alamosa to Phoenix, returning Sun, Apr 19, priced at $517 found 5 days ago

Frequently asked questions

How much does a flight from Alamosa, CO (ALS-San Luis Valley Regional) to Phoenix, AZ (PHX-Sky Harbor Intl.) cost?
You can find cheap one-way flights from $228 and cheap return flights from $456 Alamosa, CO (ALS-San Luis Valley Regional) to Phoenix, AZ (PHX-Sky Harbor Intl.) with Expedia. One-way flights usually range from $203 to $1478, and return flights typically cost between $417 and $1233. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Alamosa, CO (ALS-San Luis Valley Regional) to Phoenix, AZ (PHX-Sky Harbor Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Alamosa, CO (ALS-San Luis Valley Regional) to Phoenix, AZ (PHX-Sky Harbor Intl.)?
The cheapest month to fly from ALS to PHX is May when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Alamosa, CO (ALS-San Luis Valley Regional) to Phoenix, AZ (PHX-Sky Harbor Intl.)?
Enter ALS to PHX and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Alamosa, CO (ALS-San Luis Valley Regional) to Phoenix, AZ (PHX-Sky Harbor Intl.)?
Key Lime Air is one of the cheapest airlines offering connecting flights from Alamosa (ALS) to Phoenix (PHX), with round-trip tickets starting from around $386 with a layover in Denver Intl. (DEN). Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Alamosa, CO (ALS-San Luis Valley Regional) to Phoenix, AZ (PHX-Sky Harbor Intl.)?
To find a cheap flight from Alamosa, CO (ALS-San Luis Valley Regional) to Phoenix, AZ (PHX-Sky Harbor Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Alamosa, CO (ALS-San Luis Valley Regional) to Phoenix, AZ (PHX-Sky Harbor Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Alamosa, CO (ALS-San Luis Valley Regional) to Phoenix, AZ (PHX-Sky Harbor Intl.)?
The earliest flight from Alamosa (ALS) to Phoenix (PHX) typically departs at around 8:00 AM local time, operated by Key Lime Air and American Airlines. This seasonal service is available in April, June, and July, giving you a chance to start your day early and enjoy more time in Phoenix. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Alamosa, CO (ALS-San Luis Valley Regional) to Phoenix, AZ (PHX-Sky Harbor Intl.)?
The most popular departure times for flights from Alamosa (ALS) to Phoenix (PHX) are in the early morning, from 6am to 9am. About 57% of passengers prefer this time window. Many major carriers, including United Airlines and Delta, offer flights during this window. This timing works well because it allows you to start your day early and make the most of your time in Phoenix.
How long does it take to fly from Alamosa, CO (ALS-San Luis Valley Regional) to Phoenix, AZ (PHX-Sky Harbor Intl.)?
Flights from ALS to PHX with one stop typically take around 5 hours 50 minutes, covering approximately 443 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Alamosa, CO (ALS-San Luis Valley Regional) to Phoenix, AZ (PHX-Sky Harbor Intl.)?
Select the "Business class" and "First class" filters when looking for ALS to PHX flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Alamosa, CO (ALS-San Luis Valley Regional) to Phoenix, AZ (PHX-Sky Harbor Intl.) flight with Expedia?
It's easy to earn miles on a Alamosa, CO (ALS-San Luis Valley Regional) to Phoenix, AZ (PHX-Sky Harbor Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Phoenix from San Luis Valley Regional (ALS)?
From San Luis Valley Regional (ALS), you can fly into Sky Harbor Intl. (PHX) to reach Phoenix. Some flights may connect through major hubs like Denver Intl. (DEN) before reaching Phoenix. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Alamosa, CO (ALS-San Luis Valley Regional) to Phoenix, AZ (PHX-Sky Harbor Intl.) at the last minute?
Typically, booking a last minute flight from Alamosa, CO (ALS-San Luis Valley Regional) to Phoenix, AZ (PHX-Sky Harbor Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Alamosa, CO (ALS-San Luis Valley Regional) to Phoenix, AZ (PHX-Sky Harbor Intl.) flight and hotel package?
Securing a Alamosa, CO (ALS-San Luis Valley Regional) to Phoenix, AZ (PHX-Sky Harbor Intl.) Phoenix Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Alamosa, CO (ALS-San Luis Valley Regional) to Phoenix, AZ (PHX-Sky Harbor Intl.)?
If you booked your Alamosa, CO (ALS-San Luis Valley Regional) to Phoenix, AZ (PHX-Sky Harbor Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
San Luis Valley Regional
Destination airport
Sky Harbor Intl.
Roundtrip price
$456
Distance
442 mi

Book with confidence

Alamosa to Phoenix Flights

The cheapest times to fly from Alamosa to Phoenix

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 Alamosa to Phoenix are during the month of May. You can find some of the cheapest flights from Alamosa to Phoenix with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Alamosa to Phoenix

Sunday is one of the best days to book for cheap flights from Alamosa to Phoenix: 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 Alamosa to Phoenix

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 Alamosa to Phoenix in 2026. You can also book with separate airlines for your outbound and return journeys, from $228 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 Alamosa to Phoenix 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 Alamosa to Phoenix 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.

 

Alamosa to Phoenix Flights

*Flight schedules are subject to change.

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*Available to One Key members.