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?

Two cabin classes are available on flights from St. Louis to Portland: • Economy Class • First Class

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 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.

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.

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 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 $187, which is 20% 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.

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

American Airlines ($339) and United Airlines ($339) are the cheapest airlines to fly round-trip from St. Louis to Portland according to KAYAK data over the last 5 days.

What is the most popular layover airport when flying from St. Louis to Portland?

Washington, D.C. Reagan-National (DCA) is the most popular layover for the St. Louis to Portland route. 30% of KAYAK users who booked 1-stop round-trips over the past 3 months connected via DCA.

What is the cheapest layover airport when flying from St. Louis to Portland?

Flights via New York LaGuardia (LGA) offer the most affordable fares, with an average round-trip price of $368. Based on KAYAK data over the past 3 months.

When flying from St. Louis to Portland which airport offers the shortest layover?

Chicago Midway (MDW) had the shortest average connection time for St. Louis to Portland layovers at 164 minutes over the past 3 months.

$154 CHEAP FLIGHTS from St. Louis to Portland (STL - PWM)

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Cheapest round-trip

$339

Typical prices: $369-$492

United Airlines

Fri 10/12Mon 10/15

STL - PWM • 1 stop

Cheapest one-way

$154

Typical prices: $213-$386

Multiple Airlines

Tue 10/16

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

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

When to travel

March

Cheapest • 16% price drop

September

Most popular

Good to know

Top layover airports

New York LaGuardia (LGA)

Cheapest • Avg $368 (round-trip)

Chicago Midway (MDW)

Shortest trip • 4h 34m (one-way)

Insights

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to Portland!

Flight Deals

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

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

Round-trip

One-way

Last minute

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

Mon, Oct 12 - Thu, Oct 15

1:29 pm - 9:46 pmSTL Lambert-St Louis-PWM Portland

7h 17m1 stop Chicago O'Hare Intl

5:08 pm - 9:21 pmPWM Portland-STL Lambert-St Louis

5h 13m1 stop Chicago O'Hare Intl

$339United Airlines

Tue, Dec 1 - Sat, Dec 12

6:00 am - 11:56 amSTL Lambert-St Louis-PWM Portland

4h 56m1 stop Chicago O'Hare Intl

3:25 pm - 7:37 pmPWM Portland-STL Lambert-St Louis

5h 12m1 stop Washington, D.C. Reagan-National

$339American Airlines

Mon, Oct 12 - Thu, Oct 15

5:40 pm - 11:55 pmSTL Lambert-St Louis-PWM Portland

5h 15m1 stop Baltimore/Washington

5:20 am - 11:35 amPWM Portland-STL Lambert-St Louis

7h 15m2 stops Baltimore/Washington Charlotte Douglas

$344Southwest

Sat, Oct 10 - Tue, Oct 13

5:23 pm - 11:43 pmSTL Lambert-St Louis-PWM Portland

5h 20m1 stop Chicago O'Hare Intl

4:27 pm - 8:52 pmPWM Portland-STL Lambert-St Louis

5h 25m1 stop New York LaGuardia

$344American Airlines

Thu, Oct 1 - Sat, Oct 3

4:59 pm - 11:28 pmSTL Lambert-St Louis-PWM Portland

5h 29m1 stop Atlanta Hartsfield-Jackson

6:30 am - 11:43 amPWM Portland-STL Lambert-St Louis

6h 13m1 stop New York LaGuardia

$362Delta

Fri, Nov 13 - Wed, Nov 18

8:30 am - 2:16 pmSTL Lambert-St Louis-PWM Portland

4h 46m1 stop Chicago O'Hare Intl

3:40 pm - 9:52 pmPWM Portland-STL Lambert-St Louis

7h 12m1 stop Newark

$362United Airlines

Fri, Nov 13 - Wed, Nov 18

4:30 pm - 11:50 pmSTL Lambert-St Louis-PWM Portland

6h 20m2 stops Nashville Intl Baltimore/Washington

12:45 pm - 6:05 pmPWM Portland-STL Lambert-St Louis

6h 20m1 stop Baltimore/Washington

$367Southwest

Thu, Oct 1 - Fri, Oct 2

4:59 pm - 11:28 pmSTL Lambert-St Louis-PWM Portland

5h 29m1 stop Atlanta Hartsfield-Jackson

6:00 am - 10:55 amPWM Portland-STL Lambert-St Louis

5h 55m1 stop Atlanta Hartsfield-Jackson

$385Delta

Fri, Oct 16 - Tue, Oct 20

4:30 pm - 9:08 amSTL Lambert-St Louis-PWM Portland

15h 38m1 stop Orlando

5:09 pm - 5:40 pmPWM Portland-STL Lambert-St Louis

25h 31m2 stops Raleigh-Durham Atlanta Hartsfield-Jackson

$410Multiple Airlines

Fri, Oct 9 - Mon, Oct 12

4:30 pm - 9:08 amSTL Lambert-St Louis-PWM Portland

15h 38m1 stop Orlando

7:00 am - 5:40 pmPWM Portland-STL Lambert-St Louis

11h 40m2 stops Cincinnati Cinci./N. Kentucky Atlanta Hartsfield-Jackson

$602Multiple Airlines

Recent last minute flight deals from St. Louis to Portland

Sun, Sep 6 - Sun, Sep 13

8:30 am - 2:29 pmSTL Lambert-St Louis-PWM Portland

4h 59m1 stop Chicago O'Hare Intl

6:00 am - 12:02 pmPWM Portland-STL Lambert-St Louis

7h 02m1 stop Chicago O'Hare Intl

$428United Airlines

Sun, Sep 6 - Sun, Sep 13

12:30 pm - 6:29 pmSTL Lambert-St Louis-PWM Portland

4h 59m1 stop Newark

5:15 am - 12:02 pmPWM Portland-STL Lambert-St Louis

7h 47m2 stops Washington, D.C. Dulles Intl Chicago O'Hare Intl

$484United Airlines

Sun, Sep 6 - Sun, Sep 13

8:40 am - 6:29 pmSTL Lambert-St Louis-PWM Portland

8h 49m2 stops Washington, D.C. Dulles Intl Newark

5:15 am - 12:02 pmPWM Portland-STL Lambert-St Louis

7h 47m2 stops Washington, D.C. Dulles Intl Chicago O'Hare Intl

$624United Airlines

Fri, Sep 4 - Sun, Sep 6

8:07 pm - 11:38 amSTL Lambert-St Louis-PWM Portland

14h 31m1 stop Chicago O'Hare Intl

9:50 am - 1:56 pmPWM Portland-STL Lambert-St Louis

5h 06m1 stop New York LaGuardia

$642American Airlines

Thu, Sep 3 - Sun, Sep 6

6:00 am - 1:07 pmSTL Lambert-St Louis-PWM Portland

6h 07m1 stop Atlanta Hartsfield-Jackson

6:30 am - 11:47 amPWM Portland-STL Lambert-St Louis

6h 17m1 stop New York LaGuardia

$658Delta

Sun, Sep 6 - Tue, Sep 8

5:45 pm - 10:55 pmSTL Lambert-St Louis-PWM Portland

4h 10m1 stop Baltimore/Washington

10:30 am - 5:55 pmPWM Portland-STL Lambert-St Louis

8h 25m2 stops Baltimore/Washington Chicago Midway

$663Southwest

Fri, Sep 4 - Sun, Sep 6

2:20 pm - 10:30 pmSTL Lambert-St Louis-PWM Portland

7h 10m2 stops Chicago Midway Baltimore/Washington

6:40 am - 10:10 amPWM Portland-STL Lambert-St Louis

4h 30m1 stop Baltimore/Washington

$663Southwest

Fri, Sep 4 - Sun, Sep 6

4:23 pm - 10:27 amSTL Lambert-St Louis-PWM Portland

17h 04m1 stop Orlando

7:00 am - 3:28 pmPWM Portland-STL Lambert-St Louis

33h 28m2 stops Akron/Canton Orlando Sanford Intl

$845Multiple Airlines

Thu, Sep 3 - Mon, Sep 7

6:00 am - 2:21 pmSTL Lambert-St Louis-PWM Portland

7h 21m1 stop Philadelphia

5:30 am - 10:52 amPWM Portland-STL Lambert-St Louis

6h 22m1 stop Philadelphia

$932American Airlines

Fri, Sep 4 - Mon, Sep 7

4:23 pm - 10:27 amSTL Lambert-St Louis-PWM Portland

17h 04m1 stop Orlando

7:00 am - 4:31 pmPWM Portland-STL Lambert-St Louis

34h 31m2 stops Cincinnati Cinci./N. Kentucky Dallas/Fort Worth

$984Multiple 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.

Prices

Airlines

Layovers

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.

Find deals

Low season	February
High season	September
Cheapest flight	$154

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

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.

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?
Two cabin classes are available on flights from St. Louis to Portland:

• Economy Class
• First Class
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 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.
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.
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 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 $187, which is 20% 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.

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

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

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on your arrival and departure airports

St. Louis (STL)

Portland (PWM)

STL - PWM

$154 Find Cheap Flights from St. Louis to Portland - Compare and Save

Everything you should know

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

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

Recent one-way flight deals from St. Louis to Portland

Recent last minute flight deals from St. Louis to Portland

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

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

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

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

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

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

What is the most popular layover airport when flying from St. Louis to Portland?

What is the cheapest layover airport when flying from St. Louis to Portland?

When flying from St. Louis to Portland which airport offers the shortest layover?

Key details for St. Louis to Portland flights

Low season

High season

Cheapest flight

When to book flights from St. Louis to Portland

Your St. Louis to Portland flight questions, answered

Your guide to booking St. Louis to Portland flights

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

Information on your arrival and departure airports

Cabin class types available on flights from St. Louis to Portland

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

Find direct flights to and from St. Louis and Portland

Flights to other popular destinations

Flights from domestic origins to Portland

Choose which airport to fly into in Portland

Find deals for your return flight