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Flights from Phoenix to St. Louis

Airlines Flying from Phoenix to St. Louis

Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.
Southwest Airlines logo Southwest Airlines

Flight deals from Phoenix to St. Louis

We've found these cheap flights for you. You can book one-way or return flight tickets.

  • Round-trip
  • One way

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Flight Information from Phoenix to St. Louis

Cheapest one-way flight price AU$175
Cheapest return ticket price AU$385
Off-season travel month April
Peak season for travel June
Flight distance 2,042.1km
Average flight time 3 hours 31 minutes
Popular airline Alaska Airlines

Find the best time to fly from Phoenix to St. Louis

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Cheapest flights
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  • Jul

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  • Aug

    27 3
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Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

FAQ

  • When are flight tickets from Phoenix (PHX) to St. Louis (STL) the cheapest?

    Airlines adjust prices for flights from Phoenix to St. Louis based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much are flights from Phoenix (PHX) to St. Louis (STL) cost?

    According to Trip.com's data, the lowest price is around AU$683.

  • How long is the flight from Phoenix (PHX) to St. Louis (STL)?

    It takes about 3 hours 31 minutes to fly from Phoenix (PHX) to St. Louis (STL).

  • What are the most popular airlines that fly from Phoenix (PHX) to St. Louis (STL)?

    Airlines with flights from Phoenix (PHX) to St. Louis (STL): Alaska Airlines, Southwest Airlines and American Airlines.

  • How many airports in St. Louis (STL)?

    There are 2 airport(s) in St. Louis (STL): St. Louis Downtown Airport and St. Louis Lambert International Airport.

How to find a cheap flight from Phoenix to St. Louis

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Phoenix to St. Louis. Book your flights at the right time and save more.
1
Be flexible with your travel dates to get the cheapest flight from Phoenix to St. Louis.
Simply tap "Date" on the flight search bar to browse through the calendar and check out airfare from Phoenix to St. Louis over the next 6 months in 2025. If you're planning to fly within the next three months, it looks like the most affordable option is on Mon, Jun 16, with one-way flights priced at just AU$226.
2
Compare cheap flight deals from Phoenix to St. Louis across hundreds of airlines.
With our extensive search, you can compare prices from over 500 airlines to find the cheapest flight tickets from Phoenix to St. Louis. The cheapest airline for this route is Southwest Airlines.
3
Set up a Price Alert
By setting up a Price Alert for your journey from Phoenix to St. Louis, you can easily keep an eye on ticket prices without having to check every day.
4
Don't miss out on cheap flight deals and promo codes from Phoenix to St. Louis.
You can always find the latest offers through Trip.com Deals and Promo Codes for cheap flights. By signing up for a free membership, you'll get access to even more deals for your flights.
5
Book early or wait until the last minute.
It's usually best to book early. Flight tickets are often cheapest when they're first released, typically about a year before the departure date. So, have a look online as soon as the flights you're interested in become available. If you miss the cheapest time, you might still find some good deals as the departure date gets closer.
6
Search for flights on the go.
For the best travel flight booking experience, download the Trip.com app. You can search for cheap flights from Phoenix to St. Louis and snag some exclusive deals just for you.

More Travel Options

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