St Louis to Portland flights

Find your dates. Discover your next journey.

Lowest observed

€315

Cheapest month

October 2026

Last checked

10 Oct 2026

Observed fares. Prices may change.

Your next trip, last seen at €154

26 Oct 2026

One way

Cheapest observed day · Last checked: 13 Sep 2026

When to fly

Explore dates

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: American Airlines, Delta Air Lines, Frontier Airlines, Southwest Airlines
Typical journey time: 5h 36m

Short answer

We have seen American Airlines fares from St Louis to Portland. The lowest fare our own searches returned is €315, seen on 29 Sep 2026. October 2026 is the cheapest month in our observations, at €315. These are prices our searches returned on the dates shown, not quotes; run a live search for today's fare.

About this route

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

Route distance: 2,767 km
Typical journey time: 5h 36m
Airlines seen: American Airlines, Delta Air Lines, Frontier Airlines, Southwest 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.

Compare the same trip

We show like-for-like journeys so the comparison is fair.

Confirm with the provider

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

How our prices work

Airport to city: straight-line distance

St. Louis Lambert International Airport (STL) → St Louis, city gazetteer reference point (38.6270, -90.1994): ≈ 20 km.
Portland International Airport (PDX) → Portland, city gazetteer reference point (45.5051, -122.6750): ≈ 11 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.