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Cheap Flights from St Louis to Portland

Compare St Louis to Portland flight deals

Find the cheapest month or even day of the year to fly to Portland

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Flight deals from St Louis to Portland

Looking for a cheap last-minute deal or the best return flight from St Louis Airport to Portland Airport? If you want to travel next month, return fares start from Rs58,402. Find the lowest prices on one-way and return tickets right here.
Portland.Rs28,062 per passenger.Departing Thu, 1 Oct.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from St Louis on Thu, 1 Oct, arriving in Portland.Price includes taxes and charges.From Rs28,062, select.
Portland.Rs29,201 per passenger.Departing Sat, 8 Aug.One-way flight with Delta.Outbound indirect flight with Delta, departs from St Louis on Sat, 8 Aug, arriving in Portland.Price includes taxes and charges.From Rs29,201, select.
Portland.Rs30,911 per passenger.Departing Thu, 17 Sep.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from St Louis on Thu, 17 Sep, arriving in Portland.Price includes taxes and charges.From Rs30,911, select.
Portland.Rs37,354 per passenger.Departing Thu, 23 Jul.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Thu, 23 Jul, arriving in Portland.Price includes taxes and charges.From Rs37,354, select.
Portland.Rs41,232 per passenger.Departing Sat, 12 Sep.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Sat, 12 Sep, arriving in Portland.Price includes taxes and charges.From Rs41,232, select.
Portland.Rs41,470 per passenger.Departing Sun, 9 Aug.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Sun, 9 Aug, arriving in Portland.Price includes taxes and charges.From Rs41,470, select.
Portland.Rs44,162 per passenger.Departing Tue, 1 Dec.One-way flight with Delta.Outbound indirect flight with Delta, departs from St Louis on Tue, 1 Dec, arriving in Portland.Price includes taxes and charges.From Rs44,162, select.
Portland.Rs49,814 per passenger.Departing Thu, 15 Apr.One-way flight with Delta.Outbound indirect flight with Delta, departs from St Louis on Thu, 15 Apr, arriving in Portland.Price includes taxes and charges.From Rs49,814, select.
Portland.Rs74,775 per passenger.Departing Sun, 26 Jul.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Sun, 26 Jul, arriving in Portland.Price includes taxes and charges.From Rs74,775, select.

Find the cheapest month to fly from St Louis to Portland

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to Portland flights are currently cheapest in October.
Jul
from Rs37,354
Aug
from Rs29,201
Sep
from Rs30,911
Oct
from Rs28,062
Nov
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Dec
from Rs44,162
Jan
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Feb
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Mar
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Apr
from Rs49,814
May
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Jun
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Direct flights from St Louis to Portland

St Louis to Portland: Alternative routes

Compare routes from St Louis to Portland below. You may find an airport to fly into that's cheaper, faster, or easier than Portland.

Portland

10km from central Portland
ClosestCheapest
from Rs28,062
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St Louis to Portland: Flight information

The things to know before you go.
Cheapest flight foundRs28,062
Cheapest month to flyOctober
Average flight time4 hrs, 10 mins
Most popular airlineAlaska Airlines
Average flights per week5

Finding cheap flights from St Louis to Portland: Frequently asked questions

The best price we found for a return flight from St Louis to Portland is Rs58,402. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
4 hours and 10 minutes is the average flight time from St Louis to Portland.
Alaska Airlines and Southwest Airlines fly direct from St Louis to Portland.
As of July 2026, there are 5 flights per week flying from St Louis to Portland.
The cheapest month to fly from St Louis to Portland is usually August.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Portland Airport on Tuesday, 4 August 2026.
Yes – the average flight time is 4 hours and 10 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Portland but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Portland is around 40 days in advance, so don’t leave your flight to the last minute.

Currently, Delta and Southwest Airlines offer the cheapest flight tickets to Portland.

Travelling from St Louis Airport (STL) to Portland Airport (PDX): what you need to know

  • Jump on a direct flight from St Louis Airport to Portland Airport and you'll be travelling for an average of 4 hours 10 minutes.

  • The timezone in Portland is UTC-8, which is two hours behind St Louis.

  • There are three St Louis Airport to Portland Airport flights each week to choose from.

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are travel rules to live by. Be at the airport with enough time to board your STL to PDX flight.

  • Travelling during a peak month such as July? Public holidays and other popular periods can result in longer lines and delays at check-in and security. Play it safe and arrive up to four hours ahead of international flights and two hours before domestic departures.

  • Alaska Airlines offers direct flights from St Louis Airport to Portland Airport. Book with this popular carrier, then get ready to check out the sights in Portland — and maybe even more of the United States if you have time.

  • The majority of passengers choose to fly with Alaska Airlines on this route.

  • If you want to break up your flight, simply deselect 'Direct flights only' when searching for your ticket from St Louis Airport to Portland Airport. Here are the most popular stopovers between STL and PDX:

    • Denver International Airport

    • Seattle / Tacoma International Airport

    • Minneapolis St Paul Airport

How to find the cheapest flights from St Louis Airport (STL) to Portland Airport (PDX)

  • The cheapest price we've found for a one-way St Louis Airport to Portland Airport flight is Rs28,062. A round-trip ticket is currently Rs58,402. Depending on the availability when you book, these fares can change.

  • To find cheap tickets from STL to PDX, book ahead. Airlines usually offer lower fares when flights are first made available.

  • If you're flexible with your trip dates, use the 'Whole month' search tool. It'll find the cheapest price across every month when looking for a flight from St Louis Airport to Portland Airport.

  • Save time looking for cheap flights from STL to PDX by creating a Price Alert. We'll send you an email or notification through the app when a new low fare is offered.

  • Choose your preferred departure and arrival times, number of stops and airlines with the filters. Or sort your results by 'Cheapest' to get the best deals on flights from St Louis Airport to Portland Airport.

Handy information about St Louis Airport (STL)

Arriving at Portland Airport (PDX)

Getting from Portland Airport (PDX) to central Portland

  • The address for PDX is 7000 NE Airport Way.

  • Portland Airport to central Portland has a drive time of about 20 minutes. It's approximately 19 kilometres away.

  • When travelling by public transport, expect a journey time of around 40 minutes.

When to fly to Portland Airport (PDX)

  • The quietest month for a flight from St Louis Airport to Portland Airport is March, while July is the most popular. Pick the best time to go to Portland based on whether you prefer a bustling atmosphere or a more laid-back vibe.

  • The warmest month in Portland is August, with the temperature ranging between 12ºC and 31ºC. Book your flights from St Louis Airport to Portland Airport in this month if this is the type of weather you enjoy.

  • January sees average temperatures of between -2ºC and 10ºC. Search for cheap tickets from STL to PDX around that time if you like travelling in cooler conditions.

Explore more of the United States

  • Portland has plenty to offer, but there are so many other parts of the United States just waiting to be explored. About 241 kilometres north of Portland, a trip to Seattle will keep you busy. Start with attractions like Space Needle, Pike Place Market and Seattle Skyline.

  • Spokane is another essential stop in the United States and is around 467 kilometres north-east of Portland. No journey is complete without dropping by Riverside State Park, Spokane Falls (Upper Falls) and Cathedral of Our Lady of Lourdes.

Plan the rest of your trip from St Louis to Portland

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.