CA $238 Cheap Flights from St. Louis (STL) to Phoenix (PHX)

View CA $238 flight on Sun, Oct. 26, 2025Opens in a new window

Popular airlines from Lambert-St. Louis International Airport (STL) to Sky Harbor International Airport (PHX)

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Cheap flights from St. Louis (STL) to Phoenix (PHX)

Prices were available within the past 7 days and start at CA $238 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Find the cheapest month to fly from St. Louis (STL) to Phoenix (PHX)

September is typically the cheapest month to fly

From CA $162 - CA $289 per traveller.

Graph displaying average flight prices per month

Flight from St. Louis to Phoenix (STL - PHX) route information
Origin airport
Lambert-St. Louis Intl.
Destination airport
Sky Harbor Intl.
Distance
2014 km
Average flight time
1 hour 14 mins

St. Louis to Phoenix Flights

The easy way to book your flights from St. Louis to Phoenix 

With Expedia, it’s simple to find and book flights to Phoenix from St. Louis whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are American Airlines, Alaska Airlines, Southwest Airlines nonstop flights to Sky Harbor Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from St. Louis to Phoenix today, tomorrow, or this week.  

 

Save dollars with cheap flights from Lambert-St. Louis Intl., STL to Sky Harbor Intl., PHX 

Sort your search results by price to find great deals on your flight from St. Louis to Phoenix—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Phoenix from St. Louis currently is just rising to .  

Here are more money-saving tips: 

  • Fly in when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Phoenix  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Phoenix from St. Louis 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Phoenix with Expedia today.

Frequently asked questions

How much is a flight from Lambert Field to Phoenix Sky Harbour Intl. Airport?
Start packing your bags, because round-trip journeys between Lambert-St. Louis Intl. Airport (STL) and Sky Harbour Intl. Airport (PHX) start from . That's based on fares listed within the last 7 days on Expedia for flights departing within the next year. Prices can increase quickly, so book now to lock in the best deal. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Lambert Field to Phoenix Sky Harbour Intl. Airport?
Most flights can be cancelled online, but every airline has a different set of terms and conditions. If you do have to cancel your flight, check out our Customer Service Portal and follow the instructions.
How do I find cheap flights from STL to Phoenix Sky Harbour Intl. Airport that have flexible change policies?
Flights from STL to PHX with flexible change policies are available with many carriers. Simply use our "No change fees" filter during your search. You'll only need to cover the cost difference between flights, without any extra fees to worry about.
How many hours is the flight from Lambert Field to PHX?
There are plenty of ways to make the 3 hours and 32 minutes between Lambert Field and PHX go by faster. If you want to be productive, organize your camera roll or delete all those backed-up emails. A nice snooze also helps pass the time!
How far is the flight from Lambert Field to PHX?
Expect to be cruising at altitude for a while, as the flight distance from Lambert Field to PHX is 2,000 kilometres. Set up a playlist of your favourite podcasts before you leave home to stay entertained during the journey.
Which airlines fly direct from STL to Phoenix Sky Harbour Intl. Airport?
Southwest Airlines (WN) is one of the preferred choices for many travellers flying between Lambert-St. Louis Intl. Airport (STL) and Phoenix Sky Harbour Intl. Airport. Select from the 130 flights it offers on this route each month. American Airlines (AA) is another popular choice. It offers 60 flights a month. Between these two airlines, you'll be able to find a good deal from St. Louis to Phoenix.
Are STL to Phoenix Sky Harbour Intl. Airport flight tickets cheaper when they're purchased at the last minute?
Last-minute bookings from STL to Phoenix Sky Harbour Intl. Airport can be hit-or-miss. You may be able to score a great bargain, but you could also miss out entirely! If you'd prefer to start planning early on, Expedia compares flight deals up to 12 months in advance. Just keep in mind that not all airlines release their prices that far in advance. Our advice? Check back often as updates are made frequently.

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