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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 January , February 2026

23 Jan - 23 Feb $ 99.00
STL
St Louis
Frontier Airlines
DIRECT
PHX
Phoenix
PHX
Phoenix
Frontier Airlines
DIRECT
STL
St Louis
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22 Jan - 06 Feb $ 176.00
STL
St Louis
Frontier Airlines
1 STOPS
PHX
Phoenix
PHX
Phoenix
Frontier Airlines
DIRECT
STL
St Louis
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19 Jan - 06 Feb $ 188.00
STL
St Louis
Frontier Airlines
DIRECT
PHX
Phoenix
PHX
Phoenix
Frontier Airlines
DIRECT
STL
St Louis
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Last minute flights from St Louis to Phoenix

23 Jan - 31 Jan $ 149.00
STL
St Louis
Frontier Airlines
DIRECT
PHX
Phoenix
PHX
Phoenix
Frontier Airlines
1 STOPS
STL
St Louis
Pick dates
22 Jan - 31 Jan $ 207.00
STL
St Louis
Frontier Airlines
1 STOPS
PHX
Phoenix
PHX
Phoenix
Frontier Airlines
1 STOPS
STL
St Louis
Pick dates
19 Jan - 31 Jan $ 219.00
STL
St Louis
Frontier Airlines
DIRECT
PHX
Phoenix
PHX
Phoenix
Frontier Airlines
1 STOPS
STL
St Louis
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One-way flights to Phoenix from St Louis

1:03 PM - 1:03 PM
Frontier Airlines
0 Stops
3h 41m
STL - PHX
$ 59
Kiwi
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10:01 PM - 10:59 AM
Frontier Airlines
1 Stops
16h 23m
STL - PHX
$ 117
Kiwi
Pick dates
9:03 PM - 9:03 PM
Frontier Airlines
0 Stops
3h 41m
STL - PHX
$ 129
Kiwi
Pick dates

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.