Trip.com
>
Flights
>
Flights to United States
>
Flights to Missouri
>
Flights to St. Louis
>
Flights from Phoenix to St. Louis

Cheap flight deals from Phoenix to St. Louis

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

  • Round-trip
  • One way

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

When is the cheapest time to fly from Phoenix to St. Louis?

We monitor flight fares to help you find the best deals effortlessly

Cheapest flights
From price
Search

  • May

    27 4
  • 4 11
  • 11 18
  • 18 25

  • Jun

    25 1
  • 1 8
  • 8 15
  • 15 22
  • 22 29

  • Jul

    29 6
  • 6 13
  • 13 20
Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Frequently Asked Questions

  • 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 lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

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

    According to Trip.com's data, the lowest price is around AED 1,597.

  • How long does it take to fly from Phoenix (PHX) to St. Louis (STL)?

    It takes about 3 hours 50 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): American Airlines, Alaska Airlines, Southwest Airlines and United Airlines.

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

    There are 1 airport(s) near St. Louis (STL): 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
Being flexible with your dates to get the cheapest Phoenix to St. Louis ticket.
Tap "Date" on flight search bar to scan through the calender for Phoenix to St. Louis airfare over next 6 months in 2025. If you would like to fly in next 3 months, it seems the cheapest date is on Mon, May 19 at AED 558 for one-way flights.
2
Compare cheap Phoenix to St. Louis flight deals from over hundreds of airlines.
Our extensive search allows you to compare prices from over 500 airlines to choose the cheapest flight tickets from Phoenix to St. Louis. The cheapest airline operating is Southwest Airlines.
3
Set up a Price Alert
By setting up a Price Alert for your Phoenix to St. Louis route, you can easily track the price of your airline tickets from without manually checking every day.
4
Don't miss cheap Phoenix to St. Louis flight deals and promo codes.
You can always get the latest deals through Trip.com Deals and Promo Codes for cheap flights. If registering a free membership, you can receive more deals for your flights.
5
Book early or wait unitl the last minute.
It's always better to book early. Flight tickets tend to be the cheapest when they are first released, normally about a year before the departure date. So, check online as soon as the flights you want become available. If you miss the cheapest time, you can still find lower-priced tickets as the flight date approaches.
6
Search for flights on the go.
To get the best flight booking experience on the go, download Trip.com and search for cheap flight tickets from Phoenix to St. Louis to get exclusive deals for you.

Flight Info | Phoenix to St. Louis

Cheapest one-way flight price AED 358
Cheapest return ticket price AED 921
Off-season for travel February
Peak season for travel January
Flight distance 2,042.1 km
Average flight time 3 hours 50 minutes
Popular airline Alaska Airlines

More Travel Options

  • Top Routes from Phoenix
  • Top Routes to St. Louis
  • Trending Airlines