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Find St. Louis to Phoenix flights starting at KRW 73,725.

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

  • One way
  • Round-trip

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 St. Louis to Phoenix?

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

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

Find Cheapest Airlines Flying 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 KRW 73,725
Alaska Airlines
From KRW 178,039
United Airlines
From KRW 189,608
American Airlines
From KRW 191,569
Delta Air Lines
From KRW 200,000
Southern Airways Express
From KRW 249,020
Southwest Airlines
From KRW 251,765

Find more flights and airlines

Alternative Routes for St. Louis to Phoenix Flights

Searching for potential routes that might be cheaper and faster? Check out these alternative flights from St. Louis to Phoenix.

  • Cheapest
    Frontier Airlines
    STL
    20:34
    12h 44m
    1 transfer
    PHX
    08:18
    St. Louis Lambert International Airport - Sky Harbor International Airport
    Sun, Dec 8Frontier Airlines
    KRW 73,725
  • Delta Air Lines
    STL
    06:00
    13h 6m
    1 transfer
    AZA
    18:06
    St. Louis Lambert International Airport - Phoenix-Mesa Gateway Airport
    Mon, Dec 9Delta Air Lines
    KRW 421,765
  • Delta Air Lines
    STL
    06:00
    13h 6m
    1 transfer
    AZA
    18:06
    St. Louis Lambert International Airport - Phoenix-Mesa Gateway Airport
    Mon, Dec 9Delta Air Lines
    KRW 421,765
    Find More Flights

FAQ

  • When are flight tickets 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 cheapest 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 KRW 436,666.
  • How long is the flight from St. Louis (STL) to Phoenix (PHX)?

    It takes about 4 hours 20 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): Alaska Airlines, United Airlines, Southwest Airlines and American 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)?

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.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Flight Information for St. Louis to Phoenix Flights

Cheapest direct flight priceKRW 73,725
Cheapest return ticket priceKRW 298,039
Off-season travel monthNovember
Peak season for travelMarch
Flight distance2,042.1km
Average flight time4 hours 20 minutes
Popular airlineAmerican Airlines