Portland to St Louis flights

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Fare seen

€320Seen on 23 Sep 2026

Last checked

11 Oct 2026

Observed fares. Prices may change.

Your next trip, last seen at €119

Lowest observed

27 Oct 2026

Frontier Airlines · 3 stops · One way

Cheapest observed day · Last checked: 23 Sep 2026

Departure

12:02

When to fly

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Find the dates that work for you

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.

Prices are for observed departure and return date pairs. No data does not mean no flights.

Airlines seen: Alaska Airlines, American Airlines, Frontier Airlines, United Airlines
Typical journey time: 12h 09m

Short answer

We have seen Alaska Airlines fares from Portland to St Louis. These are prices our searches returned on the dates shown, not quotes; run a live search for today's fare. Fare seen: €320 on 23 Sep 2026.

About this route

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

Route distance: 2,767 km
Typical journey time: 12h 09m
Airlines seen: Alaska Airlines, American Airlines, Frontier Airlines, United Airlines
Seen on fares with a connection: Frontier Airlines, Alaska Airlines, United Airlines
Alternative airports: SUS

Route-level information; individual journeys vary.
We have not observed non-stop service on this route; the fares shown include at least one stop.

A clearer picture of your fare

Observed, not guaranteed

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

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The price is final on the provider's site, where your booking is completed.

How our prices work

Airport to city: straight-line distance

Portland International Airport (PDX) → Portland, city gazetteer reference point (45.5051, -122.6750): ≈ 11 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 Portland to St Louis?

A fare of €320 was seen on 23 Sep 2026. Fares change, so search your dates for the current price.

Are there direct flights from Portland to St Louis?

Our data holds no non-stop flight from Portland to St Louis. The fares on this page include at least one stop.

Which airlines fly from Portland to St Louis?

These are the carriers we have seen on the route: Alaska Airlines, American Airlines, Frontier Airlines, United Airlines.

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

The average journey time across the 85 fares we observed is 16h 39m, 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