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Latest Flight Deals from Portland to St. Louis

Book one-way or return flights from Portland to St. Louis from as little as AU$72. Choose from the popular airlines below and book your flight today!

  • One way
  • Round-trip
      • PDX11:57
        20h 16m
        1 stop
        STL10:13
        Tue, May 21|Portland - St. Louis|Frontier Airlines
        AU$72AU$136
        47% OFF
        47% OFF
        AU$136AU$72
      • PDX12:25
        20h 17m
        1 stop
        STL10:42
        Tue, Jun 4|Portland - St. Louis|Frontier Airlines
        AU$74AU$136
        45% OFF
        45% OFF
        AU$136AU$74
      • PDX11:57
        20h 16m
        1 stop
        STL10:13
        Tue, May 28|Portland - St. Louis|Frontier Airlines
        AU$78AU$136
        42% OFF
        42% OFF
        AU$136AU$78
      • PDX15:57
        16h 16m
        1 stop
        STL10:13
        Tue, May 21|Portland - St. Louis|Spirit Airlines
        AU$80
        AU$80
      • PDX15:57
        16h 21m
        1 stop
        STL10:18
        Tue, May 14|Portland - St. Louis|Spirit Airlines
        AU$81
        AU$81
      • PDX00:59
        6h 48m
        1 stop
        STL09:47
        Wed, May 15|Portland - St. Louis|Frontier Airlines
        AU$94
        AU$94
      • PDX00:59
        12h 51m
        1 stop
        STL15:50
        Tue, May 14|Portland - St. Louis|Frontier Airlines
        AU$94
        AU$94
      • PDX00:49
        6h 40m
        1 stop
        STL09:29
        Sat, Jun 8|Portland - St. Louis|Frontier Airlines
        AU$95
        AU$95
      • PDX00:48
        6h 48m
        1 stop
        STL09:36
        Wed, May 29|Portland - St. Louis|Frontier Airlines
        AU$100
        AU$100
      • PDX22:54
        9h 19m
        1 stop
        STL10:13
        Sun, May 19|Portland - St. Louis|Frontier Airlines
        AU$102
        AU$102
      • PDX13:00
        3h 5m
        Direct
        STL14:00
        Sun, May 19|Portland - St. Louis|Frontier Airlines
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Searching for the best last minute flight from Portland to St. Louis? Find one-way or return flights that are affordable and fit your itinerary.

Trip.com monitors the ticket fares of flights from Portland to St. Louis. Stay updated on price trends and snag the best deals for your upcoming trip.

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.
Airlines Flying from Portland to St. Louis

View airlines operating flights from Portland to St. Louis. Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Frontier Airlines
From AU$72
Spirit Airlines
From AU$80
Alaska Airlines
From AU$177
Delta Air Lines
From AU$203
American Airlines
From AU$210
Sun Country Airlines
From AU$211
United Airlines
From AU$221
ANA airlines

Find more flights and airlines

Alternative Routes from Portland to St. Louis

Discover different routes, airlines, and transfers and find the best alternative flights for your journey from Portland to St. Louis.

  • Cheapest
    Frontier Airlines
    PDX
    11:57
    20h 16m
    1 transfer
    STL
    10:13
    Portland International Airport - St.Louis Lambert International Airport
    Tue, May 21Frontier Airlines
    AU$72
  • Frontier Airlines
    PDX
    11:57
    20h 16m
    1 transfer
    STL
    10:13
    Portland International Airport - St.Louis Lambert International Airport
    Tue, May 21Frontier Airlines
    AU$72
    Find More Flights

How do I find the cheapest flights?

  • When are flight tickets from Portland (PDX) to St. Louis (STL) the cheapest?

    Airlines adjust prices for flights from Portland to St. Louis based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much are flights from Portland (PDX) to St. Louis (STL) cost?

    According to Trip.com's data, the lowest price is around AU$584.

  • How long is the flight from Portland (PDX) to St. Louis (STL)?

    It takes about 9 hours 30 minutes to fly from Portland (PDX) to St. Louis (STL).

  • What is the transportation method from the main airport to downtown in St. Louis?

    • The distance from St. Louis Lambert International Airport to downtown is about 20km, by taxi about 40 minutes.

  • What are the most popular airlines that fly from Portland (PDX) to St. Louis (STL)?

    Airlines with flights from Portland (PDX) to St. Louis (STL): United Airlines.

  • What's the most popular airline for direct flights from Portland (PDX) to St. Louis (STL)?

    Southwest Airlines operates 1 direct flights from Portland (PDX) to St. Louis (STL).

  • How many airports in St. Louis (STL)?

How to find a cheap flight from Portland to St. Louis

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Portland to St. Louis. Book your flights at the right time and save more.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com
Flight Information from Portland to St. Louis

Cheapest direct flight price

AU$71

Cheapest month

April

Peak season for travel

July

Flight distance

2,763.15km

Average flight time

9 hours 30 minutes

Popular airline

American Airlines

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