Phoenix to St Louis flights

Routavio compares airline fares from several flight booking sites. Search Phoenix to St Louis to see the lowest price before you book.

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Lowest fare seen

€76Seen on 15 Oct 2026

Last checked

1 Nov 2026

Observed fares. Prices may change.

Your next trip, last seen at €76

Lowest observed

4 Nov 2026

Frontier Airlines · 1 stop · One way

Cheapest observed day · Last checked: 15 Oct 2026

Departure

07:15

When to fly

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One-way fare

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Airlines seen: Frontier Airlines, United Airlines
Non-stop: Yes

Short answer

Routavio has seen Frontier Airlines fares from Phoenix to St Louis. These are prices Routavio's searches returned on the dates shown, not quotes; run a live search for today's fare. Lowest fare seen: €76 on 15 Oct 2026.

Phoenix → St LouisWed 4 Nov 2026 · €76Last checked: 15 Oct 2026

About this route

Explore the fares we observed from Phoenix to St Louis. Prices move often, so pick your dates to see the latest options.

Route distance: 2,044 km
Alternative airports: AZA, SCF, SUS

Route-level information; individual journeys vary.
Published schedules report non-stop service with Southwest Airlines. Check current timetables.

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Observed, not guaranteed

Every price is a fare we actually saw, and it may change at any time.

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How our prices work

Price alert

Price alert for Phoenix → St Louis

If the observed fare for this date drops, we will email you. At most one message a day.

Airport to city: straight-line distance

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.
St. Louis Lambert International Airport (STL) → St Louis, city gazetteer reference point (38.6270, -90.1994): ≈ 20 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 Phoenix to St Louis?

A fare of €76 was seen on 15 Oct 2026. Fares change, so search your dates for the current price.

Are there direct flights from Phoenix to St Louis?

Yes. Published schedules report non-stop flights on this route with Southwest Airlines.

Which airlines fly from Phoenix to St Louis?

Routavio has seen these carriers on the route: Frontier Airlines, United Airlines.

How long does the flight from Phoenix to St Louis take?

Across the 75 fares Routavio observed, the average journey time is 13h 44m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.

How observed prices work, what "No data" means and what a fare includes: Read the flight price guide · Price and schedule freshness on Routavio