Cheap Flights from St. Louis (STL) to Alamosa (ALS)

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Alamosa, CO (ALS-San Luis Valley Regional)

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Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to San Luis Valley Regional Airport (ALS) cost?
Grab a cheap one-way flight or cheap return flight from Lambert-St. Louis Intl. Airport (STL) 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 Lambert-St. Louis Intl. Airport (STL) to San Luis Valley Regional Airport (ALS)?
is the most affordable month to fly from STL to ALS. Traveling during an off-peak travel window is often the key to better flight prices.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to San Luis Valley Regional Airport (ALS)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest STL to ALS flight.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to San Luis Valley Regional Airport (ALS)?
There aren't any daily direct flights departing from Lambert-St. Louis Intl. Airport (STL) to San Luis Valley Regional Airport (ALS). But you can book flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be on your way in no time.
What day of the week has the most flights from STL to ALS?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Remember that flight schedules can change depending on a range of factors, such as the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to San Luis Valley Regional Airport (ALS)?
To avoid potential delays on the Lambert-St. Louis Intl. Airport (STL) to San Luis Valley Regional Airport (ALS) route, fly before 3 PM. Departures after this hour have a 22% higher chance of being canceled.**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.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to San Luis Valley Regional Airport (ALS) last-minute?
Holding off until right before your break to book a ticket from STL to ALS often results in higher prices. While you may come across some last-minute deals, they aren't always guaranteed. Keep your travel schedule open for a better chance of snagging a bargain.
Is it cheaper to book a STL to ALS flight and hotel package?
You can save money by securing a STL 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 it all in one place. Once you've chosen your ideal flights and accommodations, you can add extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to San Luis Valley Regional Airport (ALS)?
Typically, you're able to cancel or reschedule your STL to ALS flight. However, additional charges may apply, especially if you booked over 24 hours ago. Check your itinerary for the airline's fees and rules on flight changes, or if you need more details, go to our Customer Service portal.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
San Luis Valley Regional
Distance
846 mi

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St. Louis to Alamosa Flights

The cheapest times to fly from St. Louis 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 St. Louis to Alamosa are during the month of . You can find some of the cheapest flights from St. Louis to Alamosa with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Alamosa

Sunday is one of the best days to book for cheap flights from St. Louis 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 St. Louis 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 St. Louis to Alamosa in 2025. You can also book with separate airlines for your outbound and return journeys, from 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 St. Louis 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 St. Louis 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.

 

St. Louis to Alamosa Flights

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*Available to One Key members.