Your next trip, last seen at €78
Lowest observedFrontier Airlines · 1 stop · One wayWhen to fly
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The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.
One-way fare
- Airlines seen
- Alaska Airlines, Frontier Airlines, United Airlines
- Non-stop
- Yes
About this route
Explore the fares we observed from St Louis to Phoenix. Prices move often, so pick your dates to see the latest options.
- Route distance
- 2,044 km
- Alternative airports
- SUS, AZA, SCF
Route-level information; individual journeys vary.
Published schedules report non-stop service with Southwest Airlines. Check current timetables.
A clearer picture of your fare
If the observed fare for this date drops, we will email you. At most one message a day.
Airport to city: straight-line distance
- St. Louis Lambert International Airport (STL) → St Louis, city gazetteer reference point (38.6270, -90.1994): ≈ 20 km.
- Phoenix Sky Harbor International Airport (PHX) → Phoenix, city gazetteer reference point (33.4484, -112.0740): ≈ 6 km.
- Mesa Gateway Airport (AZA) → Phoenix, city gazetteer reference point (33.4484, -112.0740): ≈ 42 km.
Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.
Frequently asked
How much was a flight from St Louis to Phoenix?
A fare of €78 was seen on 17 Oct 2026. Fares change, so search your dates for the current price.
Are there direct flights from St Louis to Phoenix?
Yes. Published schedules report non-stop flights on this route with Southwest Airlines.
Which airlines fly from St Louis to Phoenix?
Routavio has seen these carriers on the route: Alaska Airlines, Frontier Airlines, United Airlines.
How long does the flight from St Louis to Phoenix take?
Across the 77 fares Routavio observed, the average journey time is 11h 29m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
How many of the observed St Louis to Phoenix fares were non-stop?
1 of the 78 fares we observed were non-stop; the rest included at least one stop. That describes our observations, not every flight that operates.
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide · Price and schedule freshness on Routavio
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Recently observed fares. Prices may change.