Cheap Flight Tickets from St. Louis (STL) to Phoenix (PHX)

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Latest Flight Deals from St. Louis to Phoenix

Book one-way or return flights from St. Louis to Phoenix from as little as AU$ 49. Choose from the popular airlines below and book your flight today!

One way
Return

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

Searching for the best last minute flight from St. Louis to Phoenix? Find one-way or return flights that are affordable and fit your itinerary.

Trip.com monitors the ticket fares of flights from St. Louis to Phoenix. Stay updated on price trends and snag the best deals for your upcoming trip.

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

Airlines Flying from St. Louis to Phoenix

View airlines operating flights from St. Louis to Phoenix. Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Frontier Airlines

From AU$ 49

American Airlines

From AU$ 98

Sun Country Airlines

From AU$ 138

Delta Air Lines

From AU$ 141

United Airlines

From AU$ 162

Spirit Airlines

From AU$ 169

Southwest Airlines

From AU$ 220

Southern Airways Express

From AU$ 228

Alaska Airlines

From AU$ 278

ANA airlines

Find more flights and airlines

Alternative Routes from St. Louis to Phoenix

Discover different routes, airlines, and transfers and find the best alternative flights for your journey from St. Louis to Phoenix.

Cheapest
STL
21:39
3h 28m
Direct
PHX
23:07
St. Louis Lambert International Airport - Sky Harbor International Airport
Wed, May 8Frontier Airlines
AU$ 49
STL
21:39
3h 28m
Direct
PHX
23:07
St. Louis Lambert International Airport - Sky Harbor International Airport
Wed, May 8Frontier Airlines
AU$ 49
Find More Flights

How do I find the cheapest flights?

When are flight from St. Louis (STL) to Phoenix (PHX) the cheapest?
Airlines adjust prices for flights from St. Louis to Phoenix 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 are flights from St. Louis (STL) to Phoenix (PHX) cost?
According to Trip.com's data, the lowest price is around AU$ 452.
How long is the flights from St. Louis (STL) to Phoenix (PHX)?
It takes about 3 hours 50 minutes to fly from St. Louis (STL) to Phoenix (PHX).
What are the most popular airlines that fly from St. Louis (STL) to Phoenix (PHX)?
Airlines with flights from St. Louis (STL) to Phoenix (PHX): American Airlines, Alaska Airlines, Volaris, Southwest Airlines, United Airlines and Frontier Airlines.
What's the most popular airline for direct flights from St. Louis (STL) to Phoenix (PHX)?
American Airlines operates 11 direct flights from St. Louis (STL) to Phoenix (PHX).
How many airports in Phoenix (PHX)?
There are 6 airport(s) in Phoenix (PHX): Phoenix-Mesa Gateway Airport, Phoenix Deer Valley Municipal Airport, Phoenix Luke Afb, Phoenix Falcon Field Airport, Sky Harbor International Airport and Phoenix Scottsdale Municipal Airport.

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

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 St. Louis to Phoenix. Book your flights at the right time and save more.

Book Early

Once prices are gone, they're gone. Lock in deals while you can!

Compare Flight Prices

Compare prices on travel agency and airline websites.

Look Out for Deals

Check airline and travel agency websites for latest flight deals

Check One-way Fares

Buying two cheap one-way flights can sometimes be a better deal than a round-trip.

Try Different Dates

Flying during the week, early in the morning, or late at night can help save money.

Use the Trip.com App

Save up to £10 per person when booking your flights on Trip.com

Flight Information from St. Louis to Phoenix

Cheapest direct flight price	AU$ 49
Cheapest return ticket price	AU$ 102
Off-season for travel	May
Peak season for travel	October
Flight distance	2,042.1km
Average flight time	3 hours 50 minutes
Popular airline	Frontier Airlines