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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 NZD 98. Choose from the popular airlines below and book your flight today!

  • One way
  • Round-trip
      • PDX00:59
        12h 51m
        1 stop
        STL15:50
        Tue, Apr 30|Portland - St. Louis|Frontier Airlines
        NZD 98NZD 236
        57% OFF
        57% OFF
        NZD 236NZD 98
      • PDX00:49
        6h 58m
        1 stop
        STL09:47
        Sat, May 4|Portland - St. Louis|Frontier Airlines
        NZD 101NZD 236
        56% OFF
        56% OFF
        NZD 236NZD 101
      • PDX00:59
        12h 51m
        1 stop
        STL15:50
        Tue, May 7|Portland - St. Louis|Frontier Airlines
        NZD 112NZD 236
        53% OFF
        53% OFF
        NZD 236NZD 112
      • PDX13:59
        12h 9m
        1 stop
        STL04:08
        Wed, May 8|Portland - St. Louis|Spirit Airlines
        NZD 116
        NZD 116
      • PDX00:59
        6h 48m
        1 stop
        STL09:47
        Wed, May 8|Portland - St. Louis|Frontier Airlines
        NZD 118
        NZD 118
      • PDX18:51
        13h 22m
        1 stop
        STL10:13
        Mon, May 20|Portland - St. Louis|Spirit Airlines
        NZD 142
        NZD 142
      • PDX10:10
        22h 8m
        1 stop
        STL10:18
        Mon, May 6|Portland - St. Louis|Frontier Airlines
        NZD 144
        NZD 144
      • PDX10:15
        22h 3m
        1 stop
        STL10:18
        Sun, May 12|Portland - St. Louis|Frontier Airlines
        NZD 144
        NZD 144
      • PDX22:16
        11h 23m
        1 stop
        STL11:39
        Fri, May 3|Portland - St. Louis|Frontier Airlines
        NZD 146
        NZD 146
      • PDX00:49
        6h 41m
        1 stop
        STL09:30
        Wed, Jun 12|Portland - St. Louis|Frontier Airlines
        NZD 152
        NZD 152
      • PDX13:00
        3h 5m
        Direct
        STL14:00
        Sun, May 5|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 NZD 98
Spirit Airlines
From NZD 116
Alaska Airlines
From NZD 220
American Airlines
From NZD 226
Sun Country Airlines
From NZD 234
Delta Air Lines
From NZD 243
United Airlines
From NZD 277
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
    00:59
    12h 51m
    1 transfer
    STL
    15:50
    Portland International Airport - St. Louis Lambert International Airport
    Tue, Apr 30Frontier Airlines
    NZD 98
  • Frontier Airlines
    PDX
    00:59
    12h 51m
    1 transfer
    STL
    15:50
    Portland International Airport - St. Louis Lambert International Airport
    Tue, Apr 30Frontier Airlines
    NZD 98
    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 departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

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

    According to Trip.com's data, the lowest price is around NZD 665.

  • 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. It takes about 40 minutes by taxi.

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 nonstop flight price

NZD 98

Off-season for travel

April

Peak season for travel

October

Flight distance

2,763.15km

Popular airline

Alaska Airlines

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