Cheap flights from Portland to St. Louis (PDX - STL) from $64

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight to St. Louis departing on 4/23. 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.
PDX — STL
Mar 4 — Mar 111

The best prices from Portland to Lambert-St Louis are usually found in January or February, booked 12 days in advance, depart on a Tuesday or Saturday and return on a Tuesday

Cheap flight deals from Portland to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 28, 2024.

Popular in

December

Cheapest in

January

Round-trip from

$323

One-way from

$155
High demand for flights, 28% potential price rise
Best time to find cheap flights, 25% potential price drop
From Portland to Lambert-St Louis
One-way flight from Portland to Lambert-St Louis

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

Travelers have found that booking a Monday departure is the best way to save up to 12% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

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

To save on the cost of your flight from Portland to St. Louis, book at least 13 days before your planned departure. Booking around this time can save you about 94% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $234 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $455.

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

January can be a great time to fly to St. Louis from Portland with a flight ticket averaging about $457. Cheapflights users have found deals in the month of January for as cheap as $194. The most expensive prices can be found in the month of December.

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

Unlike in the morning, when flights are generally more expensive, you can save up to 7% on flights from Portland to St. Louis by exploring options for tickets in the evening.

Cheap Frontier flights from Portland to St. Louis

Explore cheap flight options specifically provided by Frontier for the route between Portland and St. Louis. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,372,138 searches. Data last updated February 28, 2024.
Take a peek at the cheapest Frontier flights we've detected traveling from Portland to St. Louis. Come back soon if you're not finding the exact deal you're looking for.
Mon 4/1510:10 amPDX - STL
1 stop22h 08mFrontier
Wed 4/248:04 pmSTL - PDX
1 stop13h 12mFrontier
Deal found 2/27$127
Sun 4/1412:59 amPDX - STL
1 stop6h 48mFrontier
Sat 4/2012:59 pmSTL - PDX
1 stop10h 18mFrontier
Deal found 2/27$160
Mon 4/1510:10 amPDX - STL
1 stop22h 08mFrontier
Wed 4/248:04 pmSTL - PDX
1 stop13h 12mFrontier
Deal found 2/27$161
Thu 5/212:59 amPDX - STL
1 stop6h 48mFrontier
Tue 5/74:50 pmSTL - PDX
1 stop9h 09mFrontier
Deal found 2/27$164
Mon 4/2912:59 amPDX - STL
1 stop12h 51mFrontier
Sat 5/47:51 pmSTL - PDX
1 stop15h 24mFrontier
Deal found 2/27$167
Fri 4/57:48 pmPDX - STL
1 stop12h 35mFrontier
Sat 4/1312:59 pmSTL - PDX
1 stop10h 18mFrontier
Deal found 2/28$168
Mon 4/1510:10 amPDX - STL
1 stop22h 08mFrontier
Sat 4/2012:59 pmSTL - PDX
1 stop10h 18mFrontier
Deal found 2/27$169
Mon 4/1510:10 amPDX - STL
1 stop22h 08mFrontier
Thu 4/1810:56 pmSTL - PDX
1 stop12h 19mFrontier
Deal found 2/28$170
Sun 4/712:52 amPDX - STL
1 stop7h 20mFrontier
Wed 4/108:04 pmSTL - PDX
2 stops22h 45mFrontier
Deal found 2/28$172

Cheap Spirit Airlines flights from Portland to St. Louis

Explore cheap flight options specifically provided by Spirit Airlines for the route between Portland and St. Louis. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,372,138 searches. Data last updated February 28, 2024.
Take a gander at the lowest prices we've found on Spirit Airlines flights from Portland to St. Louis. Make sure to examine the flight information before completing your reservation.
Wed 5/81:59 pmPDX - STL
1 stop12h 09mSpirit Airlines
Mon 5/135:00 amSTL - PDX
1 stop8h 12mSpirit Airlines
Deal found 2/27$232
Wed 3/135:45 amPDX - STL
3 stops35h 05mSpirit Airlines
Tue 3/1912:00 pmSTL - PDX
2 stops25h 18mSpirit Airlines
Deal found 2/27$247
Wed 3/135:45 amPDX - STL
3 stops35h 05mSpirit Airlines
Tue 3/1912:00 pmSTL - PDX
3 stops25h 18mSpirit Airlines
Deal found 2/27$292
Fri 3/86:45 amPDX - STL
2 stops25h 58mSpirit Airlines
Sun 3/107:48 pmSTL - PDX
3 stops41h 30mSpirit Airlines
Deal found 2/26$666
Fri 3/812:09 pmPDX - STL
3 stops26h 50mSpirit Airlines
Sun 3/107:48 pmSTL - PDX
3 stops41h 30mSpirit Airlines
Deal found 2/26$705

Cheap Portland to St. Louis flights in February & March 2024

Find cheap flight options from Portland to St. Louis specifically for the months of February and March 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,372,138 searches. Prices were last updated on February 28, 2024.
Scroll through some of the best deals on flights from Portland to St. Louis in 2024. Check back regularly for other flight deals.
Wed 3/1312:09 pmPDX - STL
1 stop20h 14mMultiple Airlines
Tue 3/197:37 pmSTL - PDX
1 stop17h 41mMultiple Airlines
Deal found 2/27$177
Wed 3/610:04 pmPDX - STL
1 stop10h 19mFrontier
Wed 3/138:45 pmSTL - PDX
1 stop29h 17mFrontier
Deal found 2/27$186
Wed 3/2712:52 amPDX - STL
1 stop19h 23mFrontier
Mon 4/17:37 pmSTL - PDX
1 stop26h 16mFrontier
Deal found 2/28$197
Thu 3/147:43 pmPDX - STL
1 stop12h 40mFrontier
Tue 3/1910:04 pmSTL - PDX
1 stop27h 58mFrontier
Deal found 2/27$205
Mon 3/1112:52 amPDX - STL
1 stop18h 22mFrontier
Thu 3/147:37 pmSTL - PDX
1 stop25h 11mFrontier
Deal found 2/27$206
Sat 3/166:49 pmPDX - STL
1 stop13h 34mFrontier
Sat 3/237:37 pmSTL - PDX
1 stop26h 08mFrontier
Deal found 2/27$210
Thu 3/78:41 pmPDX - STL
1 stop11h 42mFrontier
Mon 3/118:45 pmSTL - PDX
1 stop29h 24mFrontier
Deal found 2/28$219
Wed 3/2712:52 amPDX - STL
1 stop19h 23mFrontier
Mon 4/17:37 pmSTL - PDX
1 stop26h 16mFrontier
Deal found 2/27$227
Sun 3/1012:52 amPDX - STL
1 stop7h 20mMultiple Airlines
Mon 3/187:37 pmSTL - PDX
1 stop17h 41mMultiple Airlines
Deal found 2/27$228

Portland to St. Louis 2024 flight deals

Discover exclusive flight deals for travel between Portland and St. Louis in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,372,138 searches. Data last updated February 28, 2024.
Scroll through some of the best deals on flights from Portland to St. Louis in 2024. Check back regularly for other flight deals.
Mon 4/157:04 pmPDX - STL
1 stop13h 14mMultiple Airlines
Wed 4/248:04 pmSTL - PDX
2 stops17h 10mMultiple Airlines
Deal found 2/27$123
Mon 4/1510:10 amPDX - STL
1 stop22h 08mFrontier
Wed 4/248:04 pmSTL - PDX
1 stop13h 12mFrontier
Deal found 2/27$127
Tue 4/912:59 amPDX - STL
1 stop6h 48mMultiple Airlines
Wed 4/1711:33 amSTL - PDX
1 stop23h 37mMultiple Airlines
Deal found 2/27$130
Mon 4/157:04 pmPDX - STL
1 stop13h 14mMultiple Airlines
Wed 4/248:04 pmSTL - PDX
1 stop13h 12mMultiple Airlines
Deal found 2/27$134
Tue 4/164:05 pmPDX - STL
1 stop16h 38mMultiple Airlines
Mon 4/227:51 pmSTL - PDX
1 stop17h 23mMultiple Airlines
Deal found 2/27$136
Mon 4/157:04 pmPDX - STL
1 stop13h 14mMultiple Airlines
Sat 4/2012:59 pmSTL - PDX
1 stop10h 18mMultiple Airlines
Deal found 2/27$145
Wed 4/1712:59 amPDX - STL
1 stop7h 19mMultiple Airlines
Mon 4/227:51 pmSTL - PDX
1 stop17h 23mMultiple Airlines
Deal found 2/27$150
Tue 4/164:05 pmPDX - STL
1 stop16h 38mMultiple Airlines
Tue 4/234:50 pmSTL - PDX
1 stop9h 09mMultiple Airlines
Deal found 2/27$154
Sat 4/1312:49 amPDX - STL
1 stop11h 40mMultiple Airlines
Mon 4/227:51 pmSTL - PDX
1 stop17h 23mMultiple Airlines
Deal found 2/27$156

Portland to St. Louis flights leaving soon

Find last-minute flight options from Portland to St. Louis for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 3,372,138 searches. Data last updated February 28, 2024.
Have a look at some of the last-minute flights available departing from Portland to St. Louis. To prevent any unwanted surprises, users should verify their flight info before booking.
Wed 3/610:04 pmPDX - STL
1 stop10h 19mFrontier
Wed 3/138:45 pmSTL - PDX
1 stop29h 17mFrontier
Deal found 2/27$186
Thu 3/78:41 pmPDX - STL
1 stop11h 42mFrontier
Mon 3/118:45 pmSTL - PDX
1 stop29h 24mFrontier
Deal found 2/28$219
Thu 3/712:52 amPDX - STL
1 stop7h 20mFrontier
Sun 3/1011:15 pmSTL - PDX
1 stop26h 47mFrontier
Deal found 2/27$267
Thu 3/78:41 pmPDX - STL
1 stop11h 42mFrontier
Mon 3/118:13 amSTL - PDX
2 stops17h 49mFrontier
Deal found 2/28$284
Thu 3/712:52 amPDX - STL
1 stop7h 20mFrontier
Mon 3/118:13 amSTL - PDX
2 stops17h 49mFrontier
Deal found 2/27$384
Thu 3/712:52 amPDX - STL
1 stop7h 20mFrontier
Mon 3/117:37 pmSTL - PDX
1 stop26h 16mFrontier
Deal found 2/27$389
Thu 3/712:52 amPDX - STL
1 stop7h 20mFrontier
Sun 3/108:24 pmSTL - PDX
2 stops29h 38mFrontier
Deal found 2/27$511
Wed 3/65:00 amPDX - STL
1 stop14h 03mUnited Airlines
Wed 3/138:25 amSTL - PDX
2 stops14h 33mUnited Airlines
Deal found 2/27$540
Fri 3/87:48 pmPDX - STL
1 stop12h 35mFrontier
Sun 3/108:24 pmSTL - PDX
2 stops29h 38mFrontier
Deal found 2/27$561

One-way flights to St. Louis from Portland

Search for one-way flight options from Portland to St. Louis. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,372,138 searches. Data last updated February 28, 2024.
Take a look at some of the best available options we've come across on one-way flights from Portland to St. Louis. Users needing a return flight from Portland to St. Louis should utilize the search form above.
Tue 4/2312:09 pmPDX - STL
1 stop20h 09mMultiple Airlines
Deal found 2/27$64
Fri 4/1912:59 amPDX - STL
1 stop6h 48mFrontier
Deal found 2/27$74
Sun 4/2112:59 amPDX - STL
1 stop6h 48mFrontier
Deal found 2/27$80
Wed 3/610:04 pmPDX - STL
1 stop10h 19mFrontier
Deal found 2/27$86
Mon 4/2212:59 amPDX - STL
1 stop12h 51mFrontier
Deal found 2/27$88
Tue 3/2612:59 amPDX - STL
1 stop7h 13mFrontier
Deal found 2/26$100
Wed 3/275:45 amPDX - STL
1 stop26h 38mMultiple Airlines
Deal found 2/26$101
Sat 3/166:49 pmPDX - STL
1 stop13h 34mFrontier
Deal found 2/28$108
Sun 3/1012:52 amPDX - STL
1 stop7h 20mFrontier
Deal found 2/28$109

Find flights from Portland to St. Louis within your budget

Customize your flight search to find flights from Portland to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 3,372,138 searches. Data last updated February 28, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$123 - $315

Route

Depart

Return

Price

PortlandLambert-St Louis

PDX - STL

PDXSTL

Portland

Mon 4/15

1 stop13h 14m

Lambert-St Louis

Wed 4/24

2 stops17h 10m

$123

PortlandLambert-St Louis

PDX - STL

PDXSTL

Portland

Mon 4/15

1 stop22h 08m

Lambert-St Louis

Wed 4/24

1 stop13h 12m

$127

PortlandLambert-St Louis

PDX - STL

PDXSTL

Portland

Tue 4/9

1 stop6h 48m

Lambert-St Louis

Wed 4/17

1 stop23h 37m

$130

PortlandLambert-St Louis

PDX - STL

PDXSTL

Portland

Mon 4/15

1 stop13h 14m

Lambert-St Louis

Wed 4/24

1 stop13h 12m

$134

PortlandLambert-St Louis

PDX - STL

PDXSTL

Portland

Tue 4/16

1 stop16h 38m

Lambert-St Louis

Mon 4/22

1 stop17h 23m

$136

PortlandLambert-St Louis

PDX - STL

PDXSTL

Portland

Sun 4/14

1 stop6h 48m

Lambert-St Louis

Sat 4/20

1 stop10h 18m

$160

PortlandLambert-St Louis

PDX - STL

PDXSTL

Portland

Wed 5/8

1 stop12h 09m

Lambert-St Louis

Mon 5/13

1 stop8h 12m

$232

PortlandLambert-St Louis

PDX - STL

PDXSTL

Portland

Mon 4/15

1 stop5h 14m

Lambert-St Louis

Tue 4/23

1 stop8h 28m

$258

PortlandLambert-St Louis

PDX - STL

PDXSTL

Portland

Thu 8/1

1 stop15h 16m

Lambert-St Louis

Sun 8/4

1 stop6h 40m

$315

Flights are sorted by cheapest first

Deals found on 2/27

When is the best time to book a flight from Portland to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Portland to St. Louis. Price data was last updated on January 28, 2024.
The best time to book flights from Portland to St. Louis is 12 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Search Deals

When is the cheapest time to fly from Portland to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from Portland to St. Louis. Price data was last updated on February 25, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Portland to St. Louis flight should consider departing on Sunday evenings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to St. Louis by month

Plan your trip from Portland to St. Louis by taking into account the cheapest months to travel. The average price of a one-way flight from Portland to St. Louis is currently $90 while a round-trip flight costs $179. Price data was last updated on February 25, 2024.

Currently, October is the cheapest month in which you can book a flight from Portland to St. Louis (average of $323). Flying from Portland to St. Louis in June is currently the most expensive (average of $389). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

January

$326

February

$331

March

$348

April

$362

May

$361

June

$389

July

$383

August

$338

September

$324

October

$323

November

$336

December

$326

Temperature and rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature and rainfall totals by month.

STL

Temperature

32 - 80.6 °F

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated February 28, 2024.
Read through reviews of airlines operating flights from Portland to St. Louis, such as Frontier, Spirit Airlines and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
8.1
Very good
9,258 reviews

Entertainment

7.4

Comfort

7.9

Overall

8.1

Boarding

8.2

Food

7.4

Crew

8.6

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

8.1
Very good
9,258 reviews
8.1
Very good
9,258 reviews

Entertainment

7.4

Comfort

7.9

Overall

8.1

Boarding

8.2

Food

7.4

Crew

8.6

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

8.1
Very good
11,812 reviews
8.1
Very good
9,258 reviews

Entertainment

7.4

Comfort

7.9

Overall

8.1

Boarding

8.2

Food

7.4

Crew

8.6

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

7.4
Good
11,791 reviews
8.1
Very good
9,258 reviews

Entertainment

7.4

Comfort

7.9

Overall

8.1

Boarding

8.2

Food

7.4

Crew

8.6

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

7.3
Good
15,565 reviews
8.1
Very good
9,258 reviews

Entertainment

7.4

Comfort

7.9

Overall

8.1

Boarding

8.2

Food

7.4

Crew

8.6

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

7.3
Good
726 reviews
8.1
Very good
9,258 reviews

Entertainment

7.4

Comfort

7.9

Overall

8.1

Boarding

8.2

Food

7.4

Crew

8.6

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

Related info for your journey

Find useful and relevant information for your journey from Portland to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

Yes, there are multiple flights from Portland to St. Louis for under $200. The cheapest flight booked recently is on Multiple Airlines for just $123, but on average you can expect to pay $154.

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

There are currently 17+ open flights from Portland to St. Louis within the next 7 days for less than $200.

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

Currently priced at $127, Frontier will fly you from Portland to St. Louis and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Users have found that Frontier is 72% cheaper than the other options available to this destination.

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

To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $74. Spirit Airlines flights start at $134 while deals on Sun Country Air start at $155 one-way.

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

What does PDX to STL mean?

PDX stands for Portland Airport, while STL stands for Lambert-St Louis Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.

Where are the most common layover locations when flying from Portland to St. Louis?

What are some popular things to do or see while on a layover in Denver?

If you're on a layover in Denver and looking for things to do, consider visiting Coors Field, 16th Street Mall, or Fillmore Auditorium. Coors Field, 16th Street Mall, and Fillmore Auditorium are located about 18.4 mi, 18.7 mi, and 18.1 mi, respectively from Denver Intl. Travelers can rent a car at Denver Intl for an average daily rate of $49 to make sightseeing during their layover a little easier.

Where are the least popular layover locations for Portland to St. Louis flights?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 6 airlines flying from Portland to St. Louis

Discover the top 6 airlines that operate flights from Portland to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 3,372,138 searches. Data last updated February 28, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$133Average$248FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Spirit AirlinesCheapest$153Average$263FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
American AirlinesCheapest$277Average$469FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Alaska AirlinesCheapest$285Average$465FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
DeltaCheapest$316Average$455FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapest$344Average$526FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Search flights from Portland to St. Louis by cabin class

Find flights from Portland to St. Louis, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Fly with Cheapflights

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When you search for this flight from Portland to St. Louis, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Portland to St. Louis?

Millions of users choose and trust Cheapflights to book the best flight deals from Portland to St. Louis for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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Need flexible booking options for your flight to St. Louis from Portland? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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