Cheap flights from Phoenix to St. Louis

Round-trip
Economy
Phoenix (PHX)
St. Louis (STL)
Sat 4/3
Sat 4/10
Any month
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Flight information for Phoenix to St. Louis
(PHX to STL)

Find info about flight duration, direct flights, and airports for your flight from Phoenix to St. Louis
Best Price Found$159The best flight deal from Phoenix to St. Louis found on momondo in the last 72 hours is $159
Fastest flight time2h 50mThe fastest flight from Phoenix to St. Louis takes 2h 50m.
Direct flightsMo, Tu, We and SuDirect flights go from Phoenix to St. Louis on Monday, Tuesday, Wednesday and Sunday. Airline offering direct flights is Southwest..
Airports in St. Louis1 airportThere is 1 airport near St. Louis: Lambert-St Louis (STL)

How to get the cheapest flight ticket from Phoenix to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly from Phoenix to St. Louis?

August
The cheapest time of year to fly to St. Louis from Phoenix is August. Most expensive is December

What is the cheapest day to depart Phoenix for St. Louis?

Wednesday
The cheapest day of the week is typically Wednesday. The most expensive is typically Sunday

When is the cheapest time to fly from Phoenix to St. Louis?

in the evening
Phoenix to St. Louis flights are approximately 28% more expensive in the afternoon than in the evening

What is the cheapest airline that flies to St. Louis from Phoenix?

Sun Country Air
Sun Country Air, Frontier, and United Airlines are the most popular carriers operating from Phoenix to St. Louis

What is the cheapest Phoenix to St. Louis flight route?

Phoenix Sky Harbor Intl - Lambert-St Louis
Fly from Phoenix Sky Harbor Intl to Lambert-St Louis for the best Phoenix - St. Louis flight prices
PHX
Phoenix Sky Harbor Intl
STL
Lambert-St Louis

How far in advance should you book Phoenix to St. Louis flights?

53 days before
The cheapest time to buy a flight from Phoenix to St. Louis is approximately 53 days to departure
60
Days before departure
0

Easily compare round-trip flights from Phoenix to St. Louis

Below you can see the best fares for your round-trip flight route over the next three months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Phoenix to St. Louis by changing tabs
Multiple Airlines
Mar 15
2:50 pmPhoenix Sky Harbor Intl
3h 09m
5:59 pmLambert-St Louis
Apr 15
6:00 amLambert-St Louis
7h 56m
1 stop
1:56 pmPhoenix Sky Harbor Intl
Frontier
Apr 15
7:10 amPhoenix Sky Harbor Intl
7h 23m
1 stop
2:33 pmLambert-St Louis
Apr 18
6:00 amLambert-St Louis
7h 56m
1 stop
1:56 pmPhoenix Sky Harbor Intl
Frontier
Apr 9
10:00 amPhoenix Sky Harbor Intl
18h 23m
1 stop
4:23 amLambert-St Louis
Apr 10
1:05 pmLambert-St Louis
6h 49m
1 stop
7:54 pmPhoenix Sky Harbor Intl

Find the cheapest one-way flights from Phoenix to St. Louis

If you're looking for one-way flights from Phoenix to St. Louis, view some of our deals below provided by American Airlines and Frontier
American Airlines
Apr 23
2:51 pmPhoenix Sky Harbor Intl
3h 08m
5:59 pmLambert-St Louis
American Airlines
Mar 15
2:50 pmPhoenix Sky Harbor Intl
3h 09m
5:59 pmLambert-St Louis
Frontier
Mar 11
7:10 amPhoenix Sky Harbor Intl
5h 51m
1 stop
1:01 pmLambert-St Louis

Best airlines flying from Phoenix to St. Louis

Compare and see reviews for airlines that fly from Phoenix to St. Louis with momondo
AirlineRatingFree CancellationPrice
United Airlines
PriceFrom $61
Free Cancellation
Rating
6.6
6.4

Boarding

7.0

Comfort

7.3

Crew

6.0

Entertainment

6.6

Food

Reviews

Pros: It was meh....

Cons: I got no notification that the flight was going to be 1 hour earlier

1 / 6
Frontier
PriceFrom $106
Free Cancellation
Rating
7.0
Allegiant Air
PriceFrom $145
Free Cancellation
Rating
7.6
Delta
PriceFrom $150
Free Cancellation
Rating
8.3
8.2

Boarding

8.5

Comfort

8.8

Crew

7.8

Entertainment

8.1

Food

Reviews

Pros: I appreciate the choice of snacks.

Cons: The coffee served on the flight was lukewarm.

1 / 9
American Airlines
PriceFrom $173
Free Cancellation
Rating
7.2
7.9

Boarding

7.0

Comfort

7.7

Crew

7.4

Entertainment

6.4

Food

Reviews

Pros: Entertainment

Cons: The seat space/leg room is tiny. I found it impossible to fall asleep, being in the middle of a row of three with two "big" people in either side.

1 / 8
Southwest
PriceFrom $290
Free Cancellation
Rating
10.0

Which airlines flying from Phoenix Sky Harbor Intl to Lambert-St Louis have COVID-19 safety policies in place?

Delta has implemented additional safety measures to accommodate travelers. Many airlines flying from Phoenix Sky Harbor Intl to Lambert-St Louis are offering enhanced cleaning of their aircraft. Additional policies include pre-flight testing for COVID-19-related symptoms and antibodies. Masks are also required and are provided to travelers. Some airlines are offering socially-distanced seating for a limited time. Policies will vary by airline so keep this in mind as you search for options.

Are airlines flying from Phoenix Sky Harbor Intl to Lambert-St Louis offering flexible cancellation due to COVID-19?

Due to the global impact of COVID-19, some of our airline partners operating flights from Phoenix Sky Harbor Intl to Lambert-St Louis, such as American Airlines, Frontier, and Sun Country Air may have put in place flexible cancellation policies. Use our site to search for all of the airlines offering this flexibility to you.


Alternative routes for Phoenix to St. Louis

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
Phoenix to Kansas City Flights
Fastest flight time
2h 38m
Cheapest price
$138
Tucson to Kansas City Flights
Fastest flight time
4h 48m
Cheapest price
$258
Tucson to St. Louis Flights
Fastest flight time
5h 07m
Cheapest price
$271

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