STL - PWM

$138 Find Cheap Flights from St. Louis to Portland - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Portland departing on 8/4. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$275
Typical prices: $398-$532
Delta
Tue 8/4Tue 8/11
STL - PWM • 1 stop
Cheapest one-way
$138
Typical prices: $143-$219
American Airlines
Tue 8/4
STL - PWM • 1 stop
Nonstop flights
Not available
There are currently no direct flights between St. Louis and Portland. You'll need at least 1 connection.
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Top layover airports
New York (LGA)
Cheapest • Avg $359 (round-trip)
Chicago (MDW)
Shortest trip • 4h 15m (one-way)
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When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 42% compared to booking last minute.
Insights
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When to travel
March
Cheapest • 20% price drop
September
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to Portland!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from St. Louis to Portland (STL-PWM)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Portland that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Portland

Tue, Aug 4 - Tue, Aug 11
Delta Logo
3:39 pm - 11:13 pm
STL
-
PWM
6h 34m
1 stop
Delta Logo
11:50 am - 4:44 pm
PWM
-
STL
5h 54m
1 stop
$275Delta
Tue, Aug 18 - Sat, Aug 22
Southwest Logo
1:40 pm - 9:10 pm
STL
-
PWM
6h 30m
1 stop
Southwest Logo
5:40 am - 10:50 am
PWM
-
STL
6h 10m
1 stop
$276Southwest
Tue, Aug 18 - Sat, Aug 22
Southwest Logo
1:40 pm - 9:10 pm
STL
-
PWM
6h 30m
1 stop
Southwest Logo
5:40 am - 12:35 pm
PWM
-
STL
7h 55m
2 stops
$282Southwest
Tue, Aug 18 - Sat, Aug 22
Southwest Logo
10:45 am - 9:10 pm
STL
-
PWM
9h 25m
2 stops
Southwest Logo
5:40 am - 1:25 pm
PWM
-
STL
8h 45m
2 stops
$287Southwest
Thu, Sep 17 - Mon, Sep 21
American Airlines Logo
9:58 am - 3:51 pm
STL
-
PWM
4h 53m
1 stop
American Airlines Logo
5:30 am - 10:29 am
PWM
-
STL
5h 59m
1 stop
$293American Airlines
Wed, Oct 14 - Mon, Oct 19
American Airlines Logo
5:08 pm - 11:46 pm
STL
-
PWM
5h 38m
1 stop
American Airlines Logo
4:40 pm - 11:37 pm
PWM
-
STL
7h 57m
1 stop
$302American Airlines
Fri, Oct 2 - Wed, Oct 7
United Airlines Logo
1:29 pm - 9:46 pm
STL
-
PWM
7h 17m
1 stop
United Airlines Logo
7:58 am - 12:13 pm
PWM
-
STL
5h 15m
1 stop
$313United Airlines
Tue, Dec 1 - Sat, Dec 12
American Airlines Logo
6:17 pm - 11:38 pm
STL
-
PWM
4h 21m
1 stop
American Airlines Logo
6:00 am - 10:17 am
PWM
-
STL
5h 17m
1 stop
$329American Airlines
Fri, Oct 2 - Wed, Oct 7
Southwest Logo
2:00 pm - 11:55 pm
STL
-
PWM
8h 55m
2 stops
Southwest Logo
6:00 pm - 10:00 pm
PWM
-
STL
5h 00m
1 stop
$335Southwest
Tue, Aug 4 - Tue, Aug 11
United Airlines Logo
6:00 am - 2:34 pm
STL
-
PWM
7h 34m
2 stops
United Airlines Logo
6:53 pm - 11:38 pm
PWM
-
STL
5h 45m
1 stop
$345United Airlines
Booking Insights

KAYAK's insights & trends for St. Louis to Portland flights

Get data-powered insights and trends into flights from St. Louis to Portland to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from St. Louis to Portland, Maine?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from St. Louis to Portland, Maine departing in August.

What is the cheapest month to fly from St. Louis to Portland?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Portland, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Portland is March, where tickets cost $349 (return) on average. On the other hand, the most expensive months are January and July, where the average cost of round-trip tickets is $574 and $516 respectively.

How far in advance should I book a flight from St. Louis to Portland?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from St. Louis to Portland, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from St. Louis to Portland, you should book around 3 weeks before departure, which saves you about 42% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

Find deals

Good to know

Low seasonJanuary
Cheapest flight$138
Best time to beat the crowds but there is an average 31% increase in price.
Most popular time to fly and prices are also 8% lower on average.
Flight from St. Louis to Portland

When to book flights from St. Louis to Portland

Are your dates flexible? Find out the best times to travel from St. Louis to Portland based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Portland

  • What is the cheapest flight from St. Louis to Portland?

    In the last 5 days, the lowest price for a flight from St. Louis to Portland was $138 for a one-way ticket and $275 for a round-trip.

  • Do I need a passport to fly between St. Louis and Portland?

    No

  • Which airports will I be using when flying from St. Louis to Portland?

    St. Louis and Portland are both served by 1 main airport. You will leave St. Louis from Lambert-St Louis and will be arriving at Portland.

  • Which aircraft models fly most regularly from St. Louis to Portland?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Portland?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between St. Louis and Portland, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from St. Louis to Portland, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from St. Louis to Portland are Southwest and Delta. With an average price for the route of $485 and an overall rating of 7.9, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $431 and an overall rating of 7.8.

  • How does KAYAK find such low prices on flights from St. Louis to Portland?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Portland.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Portland?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Portland from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Portland?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Portland with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and PWM can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Portland?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Portland from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight from St. Louis to Portland

Information on your arrival and departure airports

St. Louis (STL)
Portland (PWM)