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Cheap flights from Portland to St. Louis from $65

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to St. Louis departing on 2/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Portland to St. Louis

Cheap round-trip flights

These are some of the best round-trip flight deals from Portland to St. Louis that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from Portland to St. Louis.

Cheap last minute flights

Planning a quick getaway from Portland to St. Louis? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to St. Louis, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from Portland to St. Louis

Find recent round-trip train or bus tickets from Portland to St. Louis.

All round-trip flight deals to St. Louis

The cheapest plane tickets to St. Louis found on KAYAK recently.
10:37 am - 7:34 pmPDX-STL
6h 57m1 stop
7:09 pm - 12:07 amSTL-PDX
6h 58m1 stop
$109Frontier
Find Deal
Thu, Jan 9 - Sat, Jan 18
12:03 pm - 9:16 amPDX-STL
19h 13m1 stop
7:09 pm - 11:01 amSTL-PDX
17h 52m1 stop
$117Frontier
Find Deal
Thu, Jan 30 - Sat, Feb 1
5:10 am - 1:18 pmPDX-STL
6h 08m1 stop
6:59 pm - 11:54 pmSTL-PDX
6h 55m1 stop
$198Delta
Find Deal
Sat, Jan 18 - Fri, Jan 24
5:10 am - 1:43 pmPDX-STL
6h 33m1 stop
10:22 am - 5:32 pmSTL-PDX
9h 10m1 stop
$203Delta
Find Deal
Wed, Feb 12 - Wed, Feb 19
9:00 am - 6:09 pmPDX-STL
7h 09m1 stop
11:30 am - 9:00 pmSTL-PDX
11h 30m2 stops
$209United Airlines
Find Deal
Thu, Jan 30 - Sat, Feb 1
9:00 am - 6:09 pmPDX-STL
7h 09m1 stop
1:45 pm - 8:37 pmSTL-PDX
8h 52m2 stops
$213United Airlines
Find Deal
Thu, Jan 30 - Sat, Feb 1
5:45 am - 2:25 pmPDX-STL
6h 40m1 stop
3:21 pm - 9:54 pmSTL-PDX
8h 33m1 stop
$226Alaska Airlines
Find Deal
Sat, Mar 8 - Mon, Mar 10
5:00 am - 1:42 pmPDX-STL
6h 42m1 stop
5:03 am - 1:16 pmSTL-PDX
10h 13m1 stop
$228American Airlines
Find Deal
Wed, Jan 15 - Wed, Jan 22
12:26 am - 12:43 pmPDX-STL
10h 17m1 stop
2:27 pm - 8:45 pmSTL-PDX
8h 18m1 stop
$255American Airlines
Find Deal
Mon, Jan 6 - Wed, Jan 15
4:00 pm - 11:59 pmPDX-STL
5h 59m1 stop
7:00 am - 12:33 pmSTL-PDX
7h 33m1 stop
$266Alaska Airlines
Find Deal
Thu, Mar 6 - Tue, Mar 11
6:32 am - 9:16 amPDX-STL
24h 44m1 stop
$65Frontier
Find Deal
Tue, Feb 25
6:32 am - 9:16 amPDX-STL
24h 44m1 stop
$81Frontier
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Tue, Feb 18
6:05 am - 2:54 pmPDX-STL
6h 49m1 stop
$99Delta
Find Deal
Sat, Jan 18
12:59 am - 10:59 amPDX-STL
8h 00m1 stop
$104Delta
Find Deal
Fri, Feb 14
5:00 am - 3:38 pmPDX-STL
8h 38m2 stops
$144United Airlines
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Thu, Jan 23
6:05 am - 1:53 pmPDX-STL
5h 48m1 stop
$153Alaska Airlines
Find Deal
Wed, Jan 15
7:51 am - 9:52 pmPDX-STL
12h 01m2 stops
$163United Airlines
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Sat, May 17
7:00 am - 10:02 pmPDX-STL
13h 02m2 stops
$168Alaska Airlines
Find Deal
Wed, Feb 19
11:59 pm - 8:54 amPDX-STL
6h 55m1 stop
$179American Airlines
Find Deal
Mon, Jun 16
12:59 am - 10:45 amPDX-STL
7h 46m1 stop
$199American Airlines
Find Deal
Mon, Dec 30
12:59 am - 10:45 amPDX-STL
7h 46m1 stop
5:21 am - 1:09 pmSTL-PDX
9h 48m1 stop
$462American Airlines
Find Deal
Sat, Dec 21 - Mon, Dec 23
5:15 am - 1:37 pmPDX-STL
6h 22m1 stop
7:04 am - 1:09 pmSTL-PDX
8h 05m1 stop
$500American Airlines
Find Deal
Sun, Dec 22 - Mon, Dec 23
12:45 pm - 9:19 pmPDX-STL
6h 34m1 stop
9:29 pm - 12:34 pmSTL-PDX
17h 05m1 stop
$519Frontier
Find Deal
Sun, Dec 22 - Fri, Jan 3
12:59 am - 10:45 amPDX-STL
7h 46m1 stop
9:40 am - 5:45 pmSTL-PDX
10h 05m1 stop
$540American Airlines
Find Deal
Sat, Dec 21 - Fri, Jan 3
12:11 pm - 11:10 amPDX-STL
20h 59m1 stop
9:29 pm - 12:34 pmSTL-PDX
17h 05m1 stop
$563Frontier
Find Deal
Sat, Dec 21 - Mon, Dec 23
5:10 am - 1:20 pmPDX-STL
6h 10m1 stop
7:40 am - 4:33 pmSTL-PDX
10h 53m2 stops
$577Delta
Find Deal
Mon, Dec 23 - Tue, Jan 7
7:45 pm - 10:47 amPDX-STL
13h 02m2 stops
7:00 am - 12:34 pmSTL-PDX
7h 34m1 stop
$588United Airlines
Find Deal
Mon, Dec 23 - Tue, Jan 7
7:45 pm - 10:47 amPDX-STL
13h 02m2 stops
6:30 am - 6:05 pmSTL-PDX
13h 35m2 stops
$638United Airlines
Find Deal
Mon, Dec 23 - Tue, Jan 7
11:29 pm - 9:36 amPDX-STL
8h 07m1 stop
6:30 am - 3:01 pmSTL-PDX
10h 31m1 stop
$820Alaska Airlines
Find Deal
Sun, Dec 22 - Sat, Dec 28
8:00 pm - 8:52 amPDX-STL
10h 52m2 stops
6:30 am - 3:01 pmSTL-PDX
10h 31m1 stop
$942Alaska Airlines
Find Deal
Sun, Dec 22 - Sat, Dec 28

Frontier flights from Portland to St. Louis

Our best Frontier deals on Portland to St. Louis flight tickets
Frontier
Jan 9
PDX10:37 amPortland
6h 57m
1 stop
STL7:34 pmLambert-St Louis
Jan 18
STL7:09 pmLambert-St Louis
6h 58m
1 stop
PDX12:07 amPortland
Frontier
Jan 30
PDX12:03 pmPortland
19h 13m
1 stop
STL9:16 amLambert-St Louis
Feb 1
STL7:09 pmLambert-St Louis
17h 52m
1 stop
PDX11:01 amPortland
Frontier
Jan 30
PDX12:03 pmPortland
19h 13m
1 stop
STL9:16 amLambert-St Louis
Feb 1
STL7:09 pmLambert-St Louis
17h 52m
1 stop
PDX11:01 amPortland

Delta flights from Portland to St. Louis

Our best Delta deals on Portland to St. Louis flight tickets
Delta
Jan 18
PDX5:10 amPortland
6h 08m
1 stop
STL1:18 pmLambert-St Louis
Jan 24
STL6:59 pmLambert-St Louis
6h 55m
1 stop
PDX11:54 pmPortland
Delta
Feb 12
PDX5:10 amPortland
6h 33m
1 stop
STL1:43 pmLambert-St Louis
Feb 19
STL10:22 amLambert-St Louis
9h 10m
1 stop
PDX5:32 pmPortland
Delta
Jan 17
PDX2:00 pmPortland
7h 14m
1 stop
STL11:14 pmLambert-St Louis
Jan 24
STL2:13 pmLambert-St Louis
6h 03m
1 stop
PDX6:16 pmPortland

See travel insights to St. Louis from

How to get the cheapest flight ticket from Portland to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

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

In general, September is the cheapest month to fly from Portland to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $318. The month of January is another great option to travel to St. Louis, with average flight prices from Portland averaging around $366.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $379. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $475. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Portland in the evening is the least expensive time of day to depart. momondo users have found prices as low as $288 when looking at flights departing in the evening. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $447 per ticket.

What is the cheapest Portland to Lambert-St Louis flight route?

Fly from Portland to Lambert-St Louis for the best Portland - Lambert-St Louis flight prices

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

The best time to book a flight to St. Louis from Portland is 30 days out, which is when prices tend to be around $400. In the past 72 hours, momondo users found flights from Portland to St. Louis for as low as $216.

What cabin class options are available on Portland to Lambert-St Louis flights?

There are 1 cabin classes available to choose from on Portland to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Portland to St. Louis flights?

You could potentially save up to 62% on your flight if you consider stops on a Portland to St. Louis flight.

How have Portland to St. Louis flight prices changed over time?

As of December 2024, prices for Portland to St. Louis flights are approximately 4% cheaper when compared to flights at the same time last year.

When to book flights from Portland to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Portland to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Portland to St. Louis (PDX to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland to St. Louis

Best Price Found

$65

Fastest flight time

5h 12m

Direct flights

None

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Portland in the past 72 hours is $65. The best round-trip flight deal from Portland to St. Louis found on momondo in the last 72 hours is $109.
The fastest flight from Portland to St. Louis takes 5h 12m
There are no direct flights from Portland to St. Louis. Popular non-direct route for this connection is Portland Airport - Lambert-St Louis Airport.
There is 1 airport near St. Louis: Lambert-St Louis (STL)

  • How far is Portland to Lambert-St Louis by plane?

    A flight from Portland to Lambert-St Louis will travel around 1718.1 mi. A reasonable flight in good conditions will take 5h 12m.

  • When did momondo last update prices for flights from Portland Airport to Lambert-St Louis Airport?

    Prices for flights from Portland Airport to Lambert-St Louis Airport are updated daily.

  • How many operators does momondo search for flights from Portland Airport to Lambert-St Louis Airport?

  • How old do you have to be to fly from Portland Airport to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Portland Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Portland to St. Louis?

  • What is the most popular airline from Portland to St. Louis?


Best airlines flying from Portland to St. Louis

Compare and see reviews for airlines that fly from Portland to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $113Free CancellationRating
6.1
3,479 reviews
Search Frontier flights
American AirlinesPriceFrom $198Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $216Free CancellationRating
8.0
8,604 reviews
Search Delta flights
Alaska AirlinesPriceFrom $225Free CancellationRating
8.0
9,552 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $276Free CancellationRating
7.4
9,059 reviews
Search United Airlines flights
SouthwestPriceFrom $347Free CancellationRating
8.1
4,848 reviews
Search Southwest flights
  • United Airlines Flights From Portland to St. Louis

    United Airlines is one of the most popular airlines flying from Portland to St. Louis, operating 2 flights/week on average for this route. A good United Airlines flight deal for Portland to St. Louis starts from $276 round-trip, up to an average price of $468. Our users have rated United Airlines at 7.4/10.


Why use momondo?

Why should I use momondo to find a flight deal from Portland to St. Louis?

It is quick and easy to find Portland to St. Louis flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to St. Louis that suits you.

Can I find flights from Portland to St. Louis with flexible booking policies on momondo?

momondo does allow users to show only those flights to St. Louis from Portland which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Portland to St. Louis?

Once you have performed a search for Portland to St. Louis flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Portland to St. Louis right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Portland to St. Louis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.


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