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

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1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
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How to find the cheapest flight from St Louis (STL) to Phoenix (PHX)

How to find the cheapest flight from St Louis (STL) to Phoenix (PHX)
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How to find the cheapest flight from St Louis (STL) to Phoenix (PHX)
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How to find the cheapest flight from St Louis (STL) to Phoenix (PHX)
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Cheap flights from St Louis to Phoenix in April , May 2026

15 Apr - 04 May $ 205.00
STL
St Louis
Frontier Airlines
1 STOPS
PHX
Phoenix
PHX
Phoenix
Frontier Airlines
1 STOPS
STL
St Louis
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11 Apr - 04 May $ 218.00
STL
St Louis
Frontier Airlines
DIRECT
PHX
Phoenix
PHX
Phoenix
Frontier Airlines
1 STOPS
STL
St Louis
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11 Apr - 01 May $ 263.00
STL
St Louis
Frontier Airlines
DIRECT
PHX
Phoenix
PHX
Phoenix
Frontier Airlines
1 STOPS
STL
St Louis
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Last minute flights from St Louis to Phoenix

17 Apr - 30 Apr $ 205.00
STL
St Louis
Frontier Airlines
1 STOPS
PHX
Phoenix
PHX
Phoenix
Frontier Airlines
1 STOPS
STL
St Louis
Pick dates
11 Apr - 30 Apr $ 218.00
STL
St Louis
Frontier Airlines
DIRECT
PHX
Phoenix
PHX
Phoenix
Frontier Airlines
1 STOPS
STL
St Louis
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10 Apr - 30 Apr $ 582.00
STL
St Louis
United Airlines
1 STOPS
PHX
Phoenix
PHX
Phoenix
United Airlines
1 STOPS
STL
St Louis
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One-way flights to Phoenix from St Louis

4:59 PM - 9:13 PM
Frontier Airlines
1 Stops
8h 4m
STL - PHX
$ 125
Kiwi
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1:06 PM - 1:06 PM
Frontier Airlines
0 Stops
3h 35m
STL - PHX
$ 138
Kiwi
Pick dates
8:19 PM - 10:35 PM
Frontier Airlines
1 Stops
5h 23m
STL - PHX
$ 170
Kiwi
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How to find the cheapest flight from St Louis (STL) to Phoenix (PHX)

Related info for your journey
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How to find the cheapest flight from St Louis (STL) to Phoenix (PHX)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to Phoenix (PHX)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.