STL - PWM

$126 Find Cheap Flights from St. Louis to Portland - Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$339
Typical prices: $372-$503
American Airlines
Wed 12/5Sat 12/15
STL - PWM • 1 stop
Cheapest one-way
$126
Typical prices: $205-$398
Multiple Airlines
Sun 11/11
STL - PWM • 2 stops
Nonstop flights
Not available
There are currently no direct flights between St. Louis and Portland. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to book
20 weeks
in advance
Our data shows that travelers who book at least 20 weeks in advance save around 32% compared to booking last minute.
Insights
Insights
When to travel
March
Cheapest • 17% price drop
August
Most popular
Good to know
+1
Good to know
+1
Top layover airports
New York LaGuardia (LGA)
Cheapest • Avg $395 (round-trip)
Detroit Metropolitan Wayne County (DTW)
Shortest trip • 4h 41m (one-way)
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Flight Deals

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

 
Discover the best prices for you by selecting your travel dates on KAYAK.

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

Mon, Nov 16 - Sat, Nov 21
American Airlines Logo
6:00 am - 11:53 amSTL  Lambert-St Louis-PWM Portland
4h 53m1 stop Chicago O'Hare Intl
American Airlines Logo
5:26 am - 10:03 amPWM  Portland-STL Lambert-St Louis
5h 37m1 stop Washington, D.C. Reagan-National
$339American Airlines
Tue, Dec 1 - Sat, Dec 12
American Airlines Logo
5:00 am - 11:56 amSTL  Lambert-St Louis-PWM Portland
5h 56m1 stop Chicago O'Hare Intl
American Airlines Logo
2:57 pm - 7:42 pmPWM  Portland-STL Lambert-St Louis
5h 45m1 stop Washington, D.C. Reagan-National
$339American Airlines
Sat, Dec 5 - Mon, Dec 14
Delta Logo
10:14 am - 4:11 pmSTL  Lambert-St Louis-PWM Portland
4h 57m1 stop Detroit Metropolitan Wayne County
Delta Logo
4:53 pm - 8:32 pmPWM  Portland-STL Lambert-St Louis
4h 39m1 stop Detroit Metropolitan Wayne County
$339Delta
Thu, Dec 3 - Tue, Dec 15
Delta Logo
5:31 pm - 11:52 pmSTL  Lambert-St Louis-PWM Portland
5h 21m1 stop Atlanta Hartsfield-Jackson
Delta Logo
6:12 am - 11:51 amPWM  Portland-STL Lambert-St Louis
6h 39m1 stop New York LaGuardia
$339Delta
Mon, Nov 2 - Fri, Nov 6
United Airlines Logo
5:00 pm - 11:21 pmSTL  Lambert-St Louis-PWM Portland
5h 21m1 stop Newark
United Airlines Logo
5:08 pm - 11:24 pmPWM  Portland-STL Lambert-St Louis
7h 16m1 stop Chicago O'Hare Intl
$339United Airlines
Sat, Nov 7 - Sat, Nov 14
United Airlines Logo
7:30 am - 2:16 pmSTL  Lambert-St Louis-PWM Portland
5h 46m1 stop Chicago O'Hare Intl
United Airlines Logo
8:45 am - 3:43 pmPWM  Portland-STL Lambert-St Louis
7h 58m1 stop Chicago O'Hare Intl
$339United Airlines
Mon, Nov 2 - Fri, Nov 6
Southwest Logo
4:30 pm - 11:50 pmSTL  Lambert-St Louis-PWM Portland
6h 20m2 stops Nashville Intl Baltimore/Washington
Southwest Logo
5:10 pm - 12:10 amPWM  Portland-STL Lambert-St Louis
8h 00m1 stop Baltimore/Washington
$344Southwest
Thu, Dec 3 - Tue, Dec 15
Southwest Logo
6:20 am - 2:45 pmSTL  Lambert-St Louis-PWM Portland
7h 25m2 stops Chicago Midway Baltimore/Washington
Southwest Logo
12:45 pm - 6:05 pmPWM  Portland-STL Lambert-St Louis
6h 20m1 stop Baltimore/Washington
$344Southwest
Fri, Nov 20 - Mon, Nov 30
Multiple Airlines Logo
6:05 pm - 9:08 amSTL  Lambert-St Louis-PWM Portland
14h 03m1 stop Orlando
Multiple Airlines Logo
3:53 pm - 11:17 amPWM  Portland-STL Lambert-St Louis
44h 24m2 stops Columbus Atlanta Hartsfield-Jackson
$526Multiple Airlines
Thu, Oct 29 - Sat, Oct 31
Multiple Airlines Logo
4:26 pm - 9:08 amSTL  Lambert-St Louis-PWM Portland
15h 42m1 stop Orlando
Multiple Airlines Logo
9:48 am - 1:50 pmPWM  Portland-STL Lambert-St Louis
29h 02m2 stops Orlando Dallas/Fort Worth
$641Multiple Airlines
Booking Insights

Price, demand and travel trends for St. Louis to Portland flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

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

Round-trip flights from St. Louis to Portland typically range from $372 to $503. The lowest price found in the past 5 days was $339, on American Airlines.

What's the cheapest day of the week to fly from St. Louis to Portland?

Based on deals KAYAK users found in the last 12 months, Tuesday is the cheapest day of the week to fly from St. Louis to Portland. It’s 6% cheaper than the average day, while Friday is the most expensive, with prices 15% higher.

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

•March is the cheapest month to fly from St. Louis to Portland at $349 round-trip.
•January ($574) and July ($498) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 64% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from St. Louis to Portland the cheapest?

Flights from St. Louis to Portland are cheapest 20 weeks before departure. Booking in this window typically costs about 32% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Find deals

Key details for St. Louis to Portland flights

Low season

February

Cheapest flight

$126
Beat the crowds with an average 60% drop in travelers.
The most popular month to fly with an average 68% increase in travelers.
One-way 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

Your St. Louis to Portland flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What cabin classes can I book on flights from St. Louis to Portland?

    Only Economy Class is available on flights from St. Louis to Portland.

  • How long is a flight from St. Louis to Portland?

    A nonstop flight from St. Louis to Portland takes 00m, covering 1,092 miles.

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

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.

  • How much should I expect to pay for a St. Louis to Portland flight?

    Round-trip flights from St. Louis to Portland range from $372 to $503, with an average of $420 over the past 12 months. Anything below $372 counts as a good deal.

  • How expensive are last-minute St. Louis to Portland flights?

    Last-minute fares on this route (booked within two weeks of departure) run 25% above the $420 route average. Book 20 weeks before departure for the lowest fares.

  • Have flight prices from St. Louis to Portland changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $339 to $1,747. That means the highest observed fare was about 5x higher than the lowest one.

  • How are flight prices from St. Louis to Portland looking right now?

    One-way fares from St. Louis to Portland are currently lower than usual. Average one-way flight prices are about $162, which is 31% below the typical average for this route.

  • What car rental options are available at Portland Airport (PWM)?

    Portland Airport (PWM) hosts 5 major car rental companies, with daily rates starting from around $24 for economy cars. Top options include:

    • Dollar
    • Budget
    • Movly
    • Alamo
    • Hertz

  • Which airports can I use when flying from St. Louis to Portland?

    Flights from St. Louis to Portland usually depart from Lambert-St Louis (STL) and arrive at Portland (PWM).

  • Which airports do connecting flights from St. Louis to Portland pass through?

    One-stop flights from St. Louis to Portland most commonly connect through:

    • Chicago O'Hare Intl (ORD) - 27% of one-stop connections
    • Washington, D.C. Reagan-National (DCA) - 27% of one-stop connections
    • Detroit Metropolitan Wayne County (DTW) - 17% of one-stop connections
    • New York LaGuardia (LGA) - 11% of one-stop connections

  • Can I save money by using flexible dates for flights from St. Louis to Portland?

    Yes. Flexible dates can save you up to 18% on flights from St. Louis to Portland. Tuesday is the cheapest departure day at $398 round-trip on average, while Friday is the most expensive at $484, a difference of $86.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different layover airport from St. Louis to Portland?

    Flying via Detroit Metropolitan Wayne County (DTW) gives the shortest average 1-stop total travel time at 4h 41m, compared with 5h 09m via Washington, D.C. Reagan-National (DCA) and 5h 21m via Philadelphia (PHL).

  • What is the time difference between St. Louis and Portland?

    Portland is 1 hour ahead of St. Louis (Eastern Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

Your guide to booking St. Louis to Portland flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Tuesday departure and avoid flying on Friday. On this route, Tuesday flights average $398, about $86 less than Friday fares (18% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 20 weeks before you fly. On this route, that window historically saves about 32% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your St. Louis to Portland trip for March. Fares historically average $349 round-trip in that month - typically $225 less than the most expensive month, which is January (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Portland Airport.

    • Clarion Hotel Portland Airport Me
    • La Quinta Inn & Suites by Wyndham Portland DT/Maine Med
    • DoubleTree by Hilton Portland

More options for your flight from St. Louis to Portland

Complete your trip to Portland with a hotel stay or car rental

Car rentals in Portland
Hotels in Portland
Vacations in Portland