Skip to main content
Beginning of main content

STL (St. Louis) to PHX (Phoenix) Flights $268.0

Search over 321,000 hotels worldwide and 400 airlines worldwide.
Secure incredible value with Expedia's Price Guarantee.
No Expedia cancellation fee to change or cancel almost any hotel reservation.

Cheap STL to PHX Flights

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Interesting Facts About Flights from St. Louis to Phoenix (STL to PHX)

Question : How often are flights late from Lambert-St. Louis International Airport (STL) to Phoenix Sky Harbor International Airport (PHX)?
Answer : The Saint Louis to Phoenix route has an 83% on-time rate, ranking in the top 50% of the world in getting their passengers to their destinations on schedule. If a flight is late, though, expect an average of 23 minutes added to your flight time.

Question : Looking for the shortest flight from STL to PHX?
Answer : Southwest Airlines currently holds the shortest travel time with three hours and 20 minutes. For example, you would arrive in Phoenix at 3:25 PM MST if you left Saint Louis at 1:05 PM CDT. Remember, there is a one-hour time difference.

Question : Is there a day of the week that has more departure times to choose from than other days?
Answer : With nine total flight time options, Saturday provides the most flexibility from STL to PHX. The day with the fewest number of options is Tuesday with only five different times.

Question : Can you cut down on flight costs by changing the day of the week you travel to Phoenix?
Answer : Wednesday is your cheapest day to fly in August. Flexibility is paramount when booking travel plans in order to keep travel costs down.

Question : Which airline has been the most dependable in getting passengers to their destination on schedule?
Answer : Frontier Airlines leads the way with a 100% on-time rate. Stick to Frontier Airlines and you won't spend more time in airports than you have to. Perfection is hard to come by, so hopefully it continues.

Question : How many days should you spend in Phoenix?
Answer : Over the next two months, passengers from STL to PHX are planning on staying for about one week on average.

Question : Is this route your best bet for getting to Phoenix with minimal delays?
Answer : The best measurement of overall promptness combines both on-time percentage and total delay minutes. STL to PHX currently has 4 stars out of 5, earning it one of the best performances in the world. You can fly worry-free on this route.