Frontier AirlinesDepart13:28
Thu, Nov 12STL → PHX
5h 02m · 1 stop
$194one way, per person
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- Cheapest fare
- $194
- Cheapest month
- November
- Direct flights
- Not recently
- Quickest trip
- 4h 44m
Frontier Airlines · Thu, Nov 12
from $194
Usually 1+ stop
2,040 km
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Cheapest month to fly from St Louis to Phoenix
Lowest one-way fare per person in each month. Choose a month to see every date.
Cheapest dates in November 2026
The lowest fares we've seen for each day, cheapest first.
Frontier AirlinesFrontier AirlinesDepart19:59
Fri, Nov 13STL → PHX
4h 44m · 1 stop
$194one way, per person
View deal
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About flights from St Louis to Phoenix
St Louis (STL) and Phoenix (PHX) are about 2,040 km apart. We haven't seen direct fares on this route recently, so expect at least one stop; the quickest journey we've seen takes about 4h 44m. Over the next few months, one-way fares start from $194, and November 2026 is currently the cheapest month to fly.
These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.
Frequently asked questions
How much is a flight from St Louis to Phoenix?
The cheapest one-way fare we've seen recently is $194 with Frontier Airlines, departing Thursday, November 12, 2026.
What is the cheapest month to fly from St Louis to Phoenix?
November 2026 currently has the lowest fares, from $194 one way.
Are there direct flights from St Louis to Phoenix?
We haven't seen direct fares recently, so most journeys include at least one stop.
How long is the flight from St Louis to Phoenix?
The quickest journey we've seen takes about 4h 44m. St Louis and Phoenix are around 2,040 km apart.
Which airlines fly from St Louis to Phoenix?
Recent fares on this route were with Frontier Airlines.
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