Cheap flights from St. Louis, MO to Phoenix, AZ

Flights starting at $41. Choose between Frontier Airlines, American Airlines, or United Airlines to find the best price.

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Round trips

Updated:

One-way trips

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St. Louis STLDenver DENPhoenix PHX

Frontier Airlines

$86
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St. Louis STLLas Vegas LASPhoenix PHX

Multiple carriers

$77

Updated:

1261 miles
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Travelers usually depart from St. Louis Lambert International, or St. Louis Union Station when they travel from St. Louis to Phoenix. Book your trip to arrive at Phoenix Sky Harbor International, Phoenix–Mesa Gateway, Phoenix, AZ Greyhound Bus stop, Phoenix, AZ - Sky Train Station, or Phoenix, AZ - Tufesa. The distance between St. Louis and Phoenix is 2029 km. The most popular airlines for this route are Frontier Airlines, American Airlines, United Airlines, Delta Air Lines, and Spirit Airlines. St. Louis and Phoenix have 401 direct flights per week.

Weekly direct flights

MondaysTuesdaysWednesdaysThursdaysFridaysSaturdaysSundays
Direct flights2222222
Fly direct with

American Airlines on Mondays, Tuesdays, Wednesdays, Thursdays, Fridays, Saturdays, and Sundays.

Check-in for a flight from St. Louis to Phoenix

NameCarrier codeIATA CodePassport needed during bookingOnline check-in available
Frontier AirlinesFFTF9NoOpens 24 days before flight
Closes 1 hours before flight
American AirlinesAALAAYesNo
United AirlinesUALUAYesNo
Delta Air LinesDALDLYesOpens 24 days before flight
Closes 1 hours before flight
Spirit AirlinesNKSNKNoOpens 24 days before flight
Closes 1 hours before flight

United States COVID-19 travel restrictions

Latest COVID-19 travel restrictions in United States – 01/2023
Your trip summary

Most travelers from St Louis, STL can enter Phoenix, PHX.

Departure

Travel restrictions
  • Travel is allowed
  • Recommended proof of negative pre-departure COVID-19 test results
  • Quarantine is not required
Additional information
  • Masks are recommended in certain settings

Information is provided as guidance only and accurate at the time of publishing. Always check government websites and airline materials before booking and traveling.

Learn more about COVID-19 restrictions in United States in our dedicated Stories article.

Frequently asked questions

How long does it take to travel from St. Louis to Phoenix?
A one-way nonstop (direct) flight between St. Louis and Phoenix takes around 3.6 hours.
What is the flight distance between St. Louis and Phoenix?
The flight distance between St. Louis and Phoenix is 2029 km.
What airlines offer nonstop (direct) flights between St. Louis and Phoenix?
Several carriers operate flights between St. Louis and Phoenix. Airlines offering nonstop (direct) flights include American Airlines.
What are the most popular routes to and from St. Louis?
Travelers frequently search for route combinations, such as St. Louis and Las Vegas, Los Angeles, Denver, Orlando, Atlanta, Minneapolis, San Diego, San Francisco, London, Seattle, Houston, Sacramento, New York, Cancún, Washington, D.C., Fort Lauderdale, Oakland, Tampa, Paris, Dallas.
What are the most popular routes to and from Phoenix?
Travelers frequently search for route combinations, such as Phoenix and Chicago, Denver, Detroit, Washington, D.C., Atlanta, Las Vegas, Cleveland, Minneapolis, Los Angeles, Orlando, Houston, Portland, Milwaukee, Salt Lake City, Cincinnati, San Diego, Philadelphia, Raleigh, New York, Seattle.
What airports are near St. Louis?
The main airport in St. Louis is St. Louis Lambert International. It is also served by St. Louis Lambert International, General Wayne A. Downing Peoria International, Central Illinois Regional, Cape Girardeau Regional, Barkley Regional, MidAmerica St. Louis, Waynesville-St. Robert Regional, Williamson County Regional, Evansville Regional, Abraham Lincoln Capital.
What airports are near Phoenix?
The main airport in Phoenix is Phoenix Sky Harbor International. It is also served by Tucson International, Ernest A. Love Field, Show Low Regional, Marana Regional Airport, Flagstaff Pulliam.
Is it possible to combine flights, buses, and trains in one itinerary when traveling between St. Louis and Phoenix?
Yes, it's possible to combine different modes of transport between St. Louis and Phoenix thanks to our Virtual Interlining technology. Making use of not only flights but also trains and buses between St. Louis and Phoenix can give rise to new adventures. Read more about how Virtual Interlining works on Kiwi.com Stories.
What is Virtual Interlining and how do I use it?
Virtual Interlining provides a revolutionary way of traveling. You can combine different modes of transport like flights, trains, and buses into one itinerary. And this often saves money. Thanks to the world's largest carrier database, the Kiwi.com search function enables anyone to mix and match different modes of transport easily.
Which airlines fly between St. Louis and Phoenix?
When's the best time to travel between St. Louis and Phoenix?
What flights operate between St. Louis and Phoenix?
How many airports are there near St. Louis?
How many airports are there near Phoenix?
What time do nonstop (direct) flights between St. Louis and Phoenix depart?
What time do nonstop (direct) flights between St. Louis and Phoenix arrive?
What time do flights between St. Louis and Phoenix depart?
What time do flights between St. Louis and Phoenix arrive?

Planning a trip? Thanks to our Virtual Interlining algorithm, we offer billions of route combinations between any A and any B in the world by plane, train, and bus. Find the cheapest routes and best deals for you, as well as the best dates on which to travel.

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