PWM - STL

$141 Find Cheap Flights from Portland to St. Louis - 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 Portland to St. Louis departing on 11/16. 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
$281
Typical prices: $391-$721
Delta
Wed 9/16Tue 9/22
PWM - STL • 1 stop
Cheapest one-way
$141
Typical prices: $310-$488
Delta
Mon 11/16
PWM - STL • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Portland and St. Louis. You'll need at least 1 connection.
Insights
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Top layover airports
Detroit (DTW)
Cheapest • Avg $384 (round-trip)
Detroit (DTW)
Shortest trip • 5h 12m (one-way)
Insights
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When to travel
March
Cheapest • 24% price drop
May
Most popular
Good to know
Good to know
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Good to know
Good to know
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We hope you love your trip to St. Louis!
Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portland to St. Louis 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 Portland to St. Louis

Wed, Sep 16 - Tue, Sep 22
Delta Logo
6:30 am - 11:43 amPWM  Portland-STL Lambert-St Louis
6h 13m1 stop New York LaGuardia
Delta Logo
5:30 pm - 11:17 pmSTL  Lambert-St Louis-PWM Portland
4h 47m1 stop New York LaGuardia
$281Delta
Sat, Sep 19 - Mon, Sep 21
Delta Logo
6:00 am - 12:32 pmPWM  Portland-STL Lambert-St Louis
7h 32m1 stop Atlanta Hartsfield-Jackson
Delta Logo
4:59 pm - 11:28 pmSTL  Lambert-St Louis-PWM Portland
5h 29m1 stop Atlanta Hartsfield-Jackson
$281Delta
Wed, Oct 7 - Sat, Oct 17
United Airlines Logo
5:08 pm - 10:59 pmPWM  Portland-STL Lambert-St Louis
6h 51m1 stop Chicago O'Hare Intl
United Airlines Logo
4:50 pm - 11:28 pmSTL  Lambert-St Louis-PWM Portland
5h 38m1 stop Newark
$281United Airlines
Wed, Sep 16 - Mon, Sep 21
Delta Logo
6:30 am - 11:43 amPWM  Portland-STL Lambert-St Louis
6h 13m1 stop New York LaGuardia
Delta Logo
2:30 pm - 11:28 pmSTL  Lambert-St Louis-PWM Portland
7h 58m1 stop Atlanta Hartsfield-Jackson
$281Delta
Mon, Nov 16 - Thu, Nov 19
Southwest Logo
12:45 pm - 6:05 pmPWM  Portland-STL Lambert-St Louis
6h 20m1 stop Baltimore/Washington
Southwest Logo
6:35 am - 2:45 pmSTL  Lambert-St Louis-PWM Portland
7h 10m1 stop Baltimore/Washington
$282Southwest
Mon, Nov 16 - Thu, Nov 19
Southwest Logo
3:25 pm - 9:55 pmPWM  Portland-STL Lambert-St Louis
7h 30m2 stops Baltimore/Washington Nashville Intl
Southwest Logo
6:35 am - 2:45 pmSTL  Lambert-St Louis-PWM Portland
7h 10m1 stop Baltimore/Washington
$287Southwest
Sat, Sep 19 - Wed, Sep 23
American Airlines Logo
5:30 am - 10:29 amPWM  Portland-STL Lambert-St Louis
5h 59m1 stop Philadelphia
American Airlines Logo
5:13 pm - 11:45 pmSTL  Lambert-St Louis-PWM Portland
5h 32m1 stop Washington, D.C. Reagan-National
$288American Airlines
Thu, Sep 17 - Wed, Sep 23
American Airlines Logo
5:38 pm - 12:27 amPWM  Portland-STL Lambert-St Louis
7h 49m1 stop Chicago O'Hare Intl
American Airlines Logo
5:13 pm - 11:45 pmSTL  Lambert-St Louis-PWM Portland
5h 32m1 stop Washington, D.C. Reagan-National
$288American Airlines
Wed, Oct 7 - Sat, Oct 17
United Airlines Logo
5:08 pm - 9:21 pmPWM  Portland-STL Lambert-St Louis
5h 13m1 stop Chicago O'Hare Intl
United Airlines Logo
10:27 am - 7:24 pmSTL  Lambert-St Louis-PWM Portland
7h 57m2 stops Chicago O'Hare Intl Washington, D.C. Dulles Intl
$306United Airlines
Thu, Sep 10 - Sun, Sep 13
United Airlines Logo
6:00 am - 11:57 amPWM  Portland-STL Lambert-St Louis
6h 57m1 stop Chicago O'Hare Intl
United Airlines Logo
7:00 am - 1:55 pmSTL  Lambert-St Louis-PWM Portland
5h 55m1 stop Newark
$359United Airlines
Booking Insights

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

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

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

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

Flight prices are below average for this route right now.

Flights to St. Louis from Portland, Maine usually cost between $381 and $462 in November.
The lowest price found in the past 5 days was $282 on Southwest (Nov 16-Nov 19).

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Portland to St. Louis, 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 Portland to St. Louis is March, where tickets cost $354 (return) on average. On the other hand, the most expensive months are April and February, where the average cost of round-trip tickets is $568 and $546 respectively.

Find deals

Good to know

Low season

February

Cheapest flight

$141
Best time to beat the crowds but there is an average 16% increase in price.
Most popular time to fly and prices are also 14% lower on average.
Flight from Portland to St. Louis

When to book flights from Portland to St. Louis

Are your dates flexible? Find out the best times to travel from Portland to St. Louis 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 Portland to St. Louis

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

    In the last 5 days, the lowest price for a flight from Portland to St. Louis was $141 for a one-way ticket and $281 for a round-trip.

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

    No, a passport isn't needed to fly from Portland to St. Louis. However, local authorities might ask for an official ID.

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

    When flying out of Portland you will be using Portland. You will be landing at St. Louis, also known as Lambert-St Louis.

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Portland to St. Louis are Southwest and Delta. With an average price for the route of $576 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $396 and an overall rating of 7.8.

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

    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 Portland to St. Louis.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Portland 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 Portland to St. Louis?

    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 St. Louis with an airline and back to Portland with another airline. Booking your flights between Portland and STL 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 Portland to St. Louis?

    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 St. Louis from Portland 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 Portland to St. Louis

Information on your arrival and departure airports

Portland (PWM)
St. Louis (STL)