STL - PWM

$162 Find Cheap Flights from St. Louis to Portland - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$339
Typical prices: $369-$492
United Airlines
Wed 9/26Wed 10/3
STL - PWM • 1 stop
Cheapest one-way
$162
Typical prices: $213-$386
Multiple Airlines
Thu 11/1
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
22 weeks
in advance
Our data shows that travelers who book at least 22 weeks in advance save around 39% compared to booking last minute.
Insights
Insights
When to travel
March
Cheapest • 16% price drop
September
Most popular
Good to know
+1
Good to know
+1
Top layover airports
New York LaGuardia (LGA)
Cheapest • Avg $368 (round-trip)
Chicago Midway (MDW)
Shortest trip • 4h 34m (one-way)
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Insights
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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

Sat, Sep 26 - Sat, Oct 3
United Airlines Logo
2:56 pm - 9:46 pmSTL  Lambert-St Louis-PWM Portland
5h 50m1 stop Chicago O'Hare Intl
United Airlines Logo
5:08 pm - 9:21 pmPWM  Portland-STL Lambert-St Louis
5h 13m1 stop Chicago O'Hare Intl
$339United Airlines
Sat, Sep 5 - Fri, Sep 11
United Airlines Logo
4:50 pm - 11:32 pmSTL  Lambert-St Louis-PWM Portland
5h 42m1 stop Newark
United Airlines Logo
3:47 pm - 8:47 pmPWM  Portland-STL Lambert-St Louis
6h 00m1 stop Newark
$339United Airlines
Sat, Sep 26 - Tue, Sep 29
American Airlines Logo
5:18 pm - 11:47 pmSTL  Lambert-St Louis-PWM Portland
5h 29m1 stop Chicago O'Hare Intl
American Airlines Logo
5:30 am - 10:29 amPWM  Portland-STL Lambert-St Louis
5h 59m1 stop Philadelphia
$339American Airlines
Fri, Sep 11 - Wed, Sep 16
American Airlines Logo
5:18 pm - 11:47 pmSTL  Lambert-St Louis-PWM Portland
5h 29m1 stop Chicago O'Hare Intl
American Airlines Logo
5:30 am - 10:29 amPWM  Portland-STL Lambert-St Louis
5h 59m1 stop Philadelphia
$339American Airlines
Mon, Sep 14 - Tue, Sep 22
Delta Logo
5:30 pm - 11:17 pmSTL  Lambert-St Louis-PWM Portland
4h 47m1 stop New York LaGuardia
Delta Logo
6:00 am - 1:23 pmPWM  Portland-STL Lambert-St Louis
8h 23m1 stop Atlanta Hartsfield-Jackson
$339Delta
Mon, Nov 2 - Thu, Nov 12
Delta Logo
2:25 pm - 9:00 pmSTL  Lambert-St Louis-PWM Portland
5h 35m1 stop Atlanta Hartsfield-Jackson
Delta Logo
11:40 am - 3:54 pmPWM  Portland-STL Lambert-St Louis
5h 14m1 stop New York LaGuardia
$339Delta
Mon, Nov 2 - Thu, Nov 12
Southwest Logo
4:40 pm - 11:50 pmSTL  Lambert-St Louis-PWM Portland
6h 10m2 stops Charlotte Douglas Baltimore/Washington
Southwest Logo
11:10 am - 7:10 pmPWM  Portland-STL Lambert-St Louis
9h 00m2 stops Baltimore/Washington Milwaukee-Mitchell
$349Southwest
Wed, Dec 2 - Wed, Dec 16
Southwest Logo
6:35 am - 2:45 pmSTL  Lambert-St Louis-PWM Portland
7h 10m1 stop Baltimore/Washington
Southwest Logo
5:15 am - 12:40 pmPWM  Portland-STL Lambert-St Louis
8h 25m2 stops Baltimore/Washington Chicago Midway
$390Southwest
Fri, Sep 11 - Wed, Sep 16
Multiple Airlines Logo
5:19 pm - 10:28 amSTL  Lambert-St Louis-PWM Portland
16h 09m1 stop Orlando
Multiple Airlines Logo
5:09 pm - 4:24 pmPWM  Portland-STL Lambert-St Louis
24h 15m2 stops Raleigh-Durham Orlando
$403Multiple Airlines
Mon, Sep 14 - Mon, Sep 21
Multiple Airlines Logo
2:29 pm - 9:19 pmSTL  Lambert-St Louis-PWM Portland
53h 50m2 stops Atlanta Hartsfield-Jackson Columbus
Multiple Airlines Logo
9:48 am - 4:34 pmPWM  Portland-STL Lambert-St Louis
7h 46m1 stop Orlando
$440Multiple 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 from St. Louis to Portland with more confidence.

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

Round-trip flights from St. Louis to Portland start at $339. Prices are below average for this route right now, with typical round-trip fares ranging from $369 to $492. The lowest price found in the past 5 days was $339 on United Airlines.

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

Wednesday is the cheapest day of the week to fly from St. Louis to Portland, it is 5% cheaper than the average day. Friday is the most expensive day with flight prices 12% higher than average. Based on deals found by KAYAK users in the last 12 months.

What is 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 prices from St. Louis to Portland the cheapest?

Flights from St. Louis to Portland are cheapest 22 weeks before departure. Booking in this window typically costs about 39% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

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Key details for St. Louis to Portland flights

Low season

February

Cheapest flight

$162
Best time to beat the crowds but there is an average 14% increase in price.
Most popular time to fly and prices are also 2% 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

Your St. Louis to Portland flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • 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).

  • 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.

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

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

    • Washington, D.C. Reagan-National (DCA) - 30% of one-stop connections
    • Chicago O'Hare Intl (ORD) - 23% of one-stop connections
    • Detroit Metropolitan Wayne County (DTW) - 18% of one-stop connections
    • Baltimore/Washington (BWI) - 10% of one-stop connections

    Washington, D.C. Reagan-National (DCA) handles the largest share of one-stop connections on this route.

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

    Yes. Being flexible with your travel dates can save you up to 15% on the St. Louis to Portland route. Wednesday is the cheapest departure day at $398 round-trip on average, while Friday is the most expensive at $465, a difference of $67. 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 long is a flight from St. Louis to Portland?

    A nonstop flight from St. Louis to Portland takes 0h 00m, covering 1,092 miles.

  • What are the earliest and latest flights from St. Louis to Portland?

    These are the earliest and latest flight times available from St. Louis to Portland:

    • Earliest: departs at 12:00 am and lands at 12:00 am
    • Latest: departs at 12:00 am and lands at 12:00 am.

    The flight takes about 0h 00m.

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

    Last-minute fares on this route - booked within 2 weeks of departure - run 35% above the route average of $415. Book 22 weeks before departure for the lowest fares.

  • 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.

  • 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 $2,924. That means the highest observed fare was about 9x 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 $186, which is 21% below the typical average for this route.

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

    Flying via Chicago Midway (MDW) gives the shortest average 1-stop total travel time at 4h 34m, compared with 4h 40m via Detroit Metropolitan Wayne County (DTW) and 5h 03m via Washington, D.C. Reagan-National (DCA).

  • 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.

  • 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
    · Alamo
    · Hertz
    · Movly

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

    Round-trip flights from St. Louis to Portland range from $369 to $492, with an average of $415 over the past 12 months. Anything below $369 counts as a good deal.

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 can be flexible, aim for a Wednesday departure instead of Friday. On this route, Wednesday flights average $398 - about $67 less than Friday (14% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 22 weeks before you fly. On this route, that window historically saves about 39% 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
    - DoubleTree by Hilton Portland
    - La Quinta Inn & Suites by Wyndham Portland DT/Maine Med

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)