Cheap flights from St. Louis to Portland (STL - PDX) from $56

This is the cheapest one-way flight price, found on 9/20. Prices may vary by date and flight preferences.
STL — PDX
Sep 26 — Oct 31

The best prices from Lambert-St Louis to Portland are usually found in January or February, booked 26 days in advance, depart on a Tuesday or Friday and return on a Sunday

How to find the cheapest flight from St. Louis (STL) to Portland (PDX)

All the information you need to plan the best STL to PDX flight in 2023: compare St. Louis to Portland flight prices with the expected peak season, weather and rainfall in Portland.

Popular in

July

Cheapest in

January

Round-trip from

$278

One-way from

$113
High demand for flights, 38% potential price rise
Best time to find cheap flights, 39% potential price drop
From Lambert-St Louis to Portland
One-way flight from Lambert-St Louis to Portland

STL - PDX

Price

$278 - $500

PDX

Temperature

41 - 69.8 °F

PDX

Rainfall

0.7 - 5.6 inches

What is the cheapest day to fly round-trip from St. Louis to Portland?

Saturday flights are generally found to be more expensive for flights from St. Louis to Portland. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Portland.

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

To save on the cost of your flight from St. Louis to Portland, book at least 27 days before your planned departure. Booking around this time can save you about 14% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $459 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $476.

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

The best pricing can be found in the month of January. Prices to Portland from St. Louis average $437. You can even find prices in January for less than $437, as users have found deals to Portland from as low as $193. The month of July appears to be one of the more expensive times to travel to Portland from St. Louis. Flying in the targeted month can save you up to 61%.

When is the cheapest time to fly from St. Louis to Portland (STL - PDX)?

When flying from St. Louis to Portland, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 25% versus a flight in the evening.

Cheap Frontier flights from St. Louis to Portland

Peruse some of the lowest-priced Frontier flights we've found from St. Louis to Portland. Make sure to check back often as deals are often changing.

Cheap United Airlines flights from St. Louis to Portland

Some of the lowest-priced United Airlines flights we've found at this time heading from St. Louis to Portland. Deals are refreshing constantly so come back soon for more options.

Cheap St. Louis to Portland flights in September & October 2023

The best prices found for STL to PDX flights for September, October
Scroll through some of the best deals on flights from St. Louis to Portland in 2023. Check back regularly for other flight deals.

St. Louis to Portland 2023 flight deals

Cheap flights to Portland from St. Louis found for this year
Scroll through some of the best deals on flights from St. Louis to Portland in 2023. Check back regularly for other flight deals.

St. Louis to Portland flights leaving soon

Late deals on return flights to Portland from St. Louis, departing today and this week
Have a look at some of the flights available from St. Louis to Portland departing last-minute. It's wise to confirm all flight details are correct before booking.

One-way flights to Portland from St. Louis

The cheapest one-way flights from St. Louis to Portland
Users traveling one-way from St. Louis to Portland can select one of these great deals. Users needing a return flight from St. Louis to Portland should utilize the search form above.

Find flights from St. Louis to Portland within your budget

Use the slider to find flights from St. Louis to Portland that fit your budget.

Fly from

Any airport

Fly to

Any airport

Budget

$160 - $329

Route

Depart

Return

Price

Lambert-St LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Mon 10/9

2 stops10h 24m

Portland

Sat 10/14

1 stop6h 58m

Lambert-St LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Thu 10/12

1 stop18h 26m

Portland

Fri 10/13

1 stop7h 14m

Lambert-St LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Tue 10/10

1 stop11h 11m

Portland

Thu 10/12

1 stop7h 15m

Lambert-St LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Fri 10/6

1 stop10h 48m

Portland

Sat 10/14

1 stop6h 58m

Lambert-St LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Sat 10/7

2 stops20h 11m

Portland

Sat 10/14

1 stop6h 58m

Lambert-St LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Tue 10/3

2 stops21h 22m

Portland

Thu 10/12

1 stop7h 15m

Lambert-St LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Tue 10/17

2 stops20h 31m

Portland

Tue 10/24

3 stops31h 33m

Lambert-St LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Tue 10/17

1 stop7h 27m

Portland

Mon 10/23

1 stop7h 30m

Lambert-St LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Tue 11/14

1 stop7h 24m

Portland

Tue 11/14

1 stop5h 59m

Flights are sorted by cheapest first

Deals found on 9/20

Reviews of airlines servicing Portland

Read through reviews of airlines operating flights from St. Louis to Portland, such as Frontier, United Airlines and Spirit Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
1,393 reviews

Comfort

8.0

Food

7.2

Crew

8.6

Entertainment

7.2

Boarding

8.3

Overall

8.1

Reviews

1 / 10

Flight departed on time and landed a little early. Friendly staff, and they did two passes with drinks and complimentary snacks.

Alaska Airlines
8.1
Very good
1,393 reviews
Alaska Airlines
8.1
Very good
1,393 reviews

Comfort

8.0

Food

7.2

Crew

8.6

Entertainment

7.2

Boarding

8.3

Overall

8.1

Reviews

1 / 10

Flight departed on time and landed a little early. Friendly staff, and they did two passes with drinks and complimentary snacks.

Delta
7.9
Good
3,016 reviews
Alaska Airlines
8.1
Very good
1,393 reviews

Comfort

8.0

Food

7.2

Crew

8.6

Entertainment

7.2

Boarding

8.3

Overall

8.1

Reviews

1 / 10

Flight departed on time and landed a little early. Friendly staff, and they did two passes with drinks and complimentary snacks.

United Airlines
7.4
Good
1,887 reviews
Alaska Airlines
8.1
Very good
1,393 reviews

Comfort

8.0

Food

7.2

Crew

8.6

Entertainment

7.2

Boarding

8.3

Overall

8.1

Reviews

1 / 10

Flight departed on time and landed a little early. Friendly staff, and they did two passes with drinks and complimentary snacks.

American Airlines
7.2
Good
2,635 reviews
Alaska Airlines
8.1
Very good
1,393 reviews

Comfort

8.0

Food

7.2

Crew

8.6

Entertainment

7.2

Boarding

8.3

Overall

8.1

Reviews

1 / 10

Flight departed on time and landed a little early. Friendly staff, and they did two passes with drinks and complimentary snacks.

Spirit Airlines
6.3
Okay
1,480 reviews
Alaska Airlines
8.1
Very good
1,393 reviews

Comfort

8.0

Food

7.2

Crew

8.6

Entertainment

7.2

Boarding

8.3

Overall

8.1

Reviews

1 / 10

Flight departed on time and landed a little early. Friendly staff, and they did two passes with drinks and complimentary snacks.

Related info for your journey

Useful info, stats and facts about St. Louis to Portland flights.

Can I find flights from St. Louis to Portland for under $200 on Cheapflights?

Yes, there are multiple flights from St. Louis to Portland for under $200. The cheapest flight booked recently is on Multiple Airlines for just $160, but on average you can expect to pay $173.

Are there last-minute flights available from St. Louis to Portland for under $200?

There are currently 8+ open flights from St. Louis to Portland within the next 7 days for less than $200.

How popular is this St. Louis to Portland flight route?

What are the cheapest airlines flying from St. Louis to Portland round-trip?

Currently priced at $161, Frontier will fly you from St. Louis to Portland and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Spirit Airlines for as low as $194. These flights start at 63% lower than the current average price 3 months from now.

What are the cheapest airlines to fly from St. Louis to Portland one-way?

To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $56. Spirit Airlines flights start at $103 while deals on Delta start at $167 one-way.

What are the most popular airlines that fly from St. Louis to Portland?

What does STL to PDX mean?

These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Lambert-St Louis Airport to Portland Airport flight would often be abbreviated as a STL to PDX flight.

Alternative routes for St. Louis to Portland

See prices for flight routes from nearby airports that may be better suited for you.

Top 6 airlines flying from St. Louis to Portland

The chart below displays the airlines Cheapflights users traveling from St. Louis to Portland choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$120Average$226FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
FrontierCheapest$133Average$222FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Alaska AirlinesCheapest$216Average$439FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
DeltaCheapest$300Average$458FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapest$302Average$509FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$315Average$478FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Hourly flight availability from St. Louis to Portland

See what time of day planes typically take off from St. Louis to Portland
50%of flight departuresEarly morningMidnight to 6 am
25%of flight departuresMorning6 am to noon
25%of flight departuresAfternoonNoon to 6 pm
0%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from St. Louis to Portland

See how many times per day planes take to the skies headed from St. Louis to Portland
Sunday1daily flight
Monday0daily flights
Tuesday0daily flights
Wednesday0daily flights
Thursday0daily flights
Friday0daily flights
Saturday0daily flights
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