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PDX - STL

Find cheap flights from Portland to St. Louis from $51

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Portland to St. Louis departing on 5/21. 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.
1 adult
0 bags
Sun 6/2
Sun 6/9

Search hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to St. Louis.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to St. Louis.
In the last 7 days travelers have searched 43,693,958 times on KAYAK, and here is why:

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Cheap flight deals from Portland to St. Louis (PDX-STL)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portland to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
7:54 pm - 10:13 amPDX-STL
12h 19m2 stops
11:36 am - 12:07 amSTL-PDX
14h 31m1 stop
Fri, May 24 - Wed, May 29
6:00 am - 3:14 pmPDX-STL
7h 14m1 stop
4:05 pm - 11:05 amSTL-PDX
21h 00m1 stop
$165Spirit Airlines
Find Deal
Fri, May 31 - Mon, Jun 3
3:57 pm - 10:46 amPDX-STL
16h 49m1 stop
7:23 pm - 7:20 pmSTL-PDX
25h 57m2 stops
Tue, May 21 - Tue, May 28
10:10 am - 10:09 amPDX-STL
21h 59m1 stop
8:45 pm - 11:43 pmSTL-PDX
28h 58m1 stop
$173Frontier
Find Deal
Mon, May 13 - Fri, May 31
12:48 am - 2:53 pmPDX-STL
12h 05m1 stop
7:29 pm - 3:54 pmSTL-PDX
22h 25m1 stop
$175Frontier
Find Deal
Wed, Sep 4 - Sun, Sep 8
5:21 pm - 12:46 amPDX-STL
5h 25m1 stop
6:50 pm - 11:42 pmSTL-PDX
6h 52m1 stop
$280Delta
Find Deal
Wed, May 29 - Mon, Jun 3
3:15 pm - 11:51 pmPDX-STL
6h 36m1 stop
7:05 am - 11:08 pmSTL-PDX
18h 03m1 stop
$303American Airlines
Find Deal
Fri, Aug 9 - Tue, Aug 13
1:25 pm - 11:17 pmPDX-STL
7h 52m1 stop
5:21 am - 12:52 pmSTL-PDX
9h 31m1 stop
$306American Airlines
Find Deal
Sat, May 18 - Tue, May 28
12:30 am - 10:35 amPDX-STL
8h 05m1 stop
2:29 pm - 8:46 pmSTL-PDX
8h 17m2 stops
$316Delta
Find Deal
Sat, Jun 8 - Wed, Jun 12
5:30 pm - 4:10 pmPDX-STL
20h 40m1 stop
11:37 am - 4:55 pmSTL-PDX
7h 18m1 stop
$330Sun Country Air
Find Deal
Fri, Oct 4 - Fri, Oct 11

Flights from Portland to St. Louis - Travel Insights & Trends

Get data-powered insights and trends into flights from Portland to St. Louis to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Portland to St. Louis?

The average price of all flights from Portland to St. Louis clicked on KAYAK for each day over the last 12 months.
Your flight ticket price will generally be cheaper if you fly to St. Louis on a Saturday and more expensive on a Sunday. On your return trip to Portland, you should consider flying back on a Saturday, and avoid Sundays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Portland to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Portland to St. Louis is January, where tickets cost $343 on average. On the other hand, the most expensive months are December and June, where the average cost of tickets is $636 and $553 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Portland to St. Louis, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Portland to St. Louis, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 12 days before departure.

Which airlines provide the cheapest flights from Portland to St. Louis?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the cheapest one-way ticket from Portland to St. Louis found on KAYAK was with Spirit Airlines for $51. Spirit Airlines proposed a round-trip connection from $165 and Frontier from $173.

What’s the earliest departure time from Portland to St. Louis?

Early birds can take the earliest flight from Portland at 7:00 am and will be landing in St. Louis at 12:40 pm.

What’s the latest departure time from Portland to St. Louis?

If you prefer to fly at night, the latest flight from Portland to St. Louis jets off at 8:55 am and lands at 2:30 pm.

Good to know

Low season

February

High season

October

Cheapest flight

$51
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly and prices are also 14% lower on average.
Flight from Portland to St. Louis

When to book flights from Portland to St. Louis

Are your dates flexible? Find out the best times to travel from Portland to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Portland to St. Louis

  • Does the Portland Airport have any designated areas where children can play?

    Yes. One of these designated play areas is located landside in the D/E terminal, and the other is located airside, adjacent to Gate C17. These indoor playgrounds have seating surrounding them where parents can sit as they watch their kids run around and have fun, burning off energy before the flight to St. Louis.

  • Where can I park my car at the Portland International Airport (PDX)?

    The most affordable option at PDX is the Economy Lot, which has a free shuttle running between it and the terminals about every 10 minutes. If you want to be a bit closer to the airport and spend a little bit more money, you can opt for the long-term parking spots in Parking Garage P2 and P3.

  • Are there any private places for traveling mothers to nurse at STL?

    Yes. At the St. Louis Airport, mothers who need to nurse or pump can take advantage of the Lactation Suites located airside near Gates C7, E31, and A8. Each of these private rooms includes a comfortable chair for Mom, a table, a bench, a foot rest, an electrical outlet, and a sink.

  • Where can I pick up my rental car at STL?

    All rental car agencies at the St. Louis Airport are located off airport grounds. When you land at STL, proceed to the Arrivals curb where you can catch a free shuttle to the car rental agency where you have reserved a vehicle. These free shuttles stop at Exit 17 outside Terminal 1 and at Exit 12 outside Terminal 2. Some car rental agencies with free shuttle service to STL include National, Enterprise, Thrifty, Alamo, Hertz, Budget, and Avis.

  • What is the cheapest flight from Portland to St. Louis?

    In the last 3 days, the lowest price for a flight from Portland to St. Louis was $51 for a one-way ticket and $151 for a round-trip.

  • Do I need a passport to fly between Portland and St. Louis?

    No

  • Which airports will I be using when flying from Portland to St. Louis?

    Portland and St. Louis are both served by 1 main airport. You will leave Portland from Portland and will be arriving at Lambert-St Louis.

  • Which aircraft models fly most regularly from Portland to St. Louis?

    We unfortunately don’t have that data for this specific route.

  • On which days can I fly direct from Portland to St. Louis?

    You can catch a nonstop flight from Portland to St. Louis on on Saturday, and Sunday.

  • Which is the best airline for flights from Portland to St. Louis, Delta or Alaska Airlines?

    The two airlines most popular with KAYAK users for flights from Portland to St. Louis are Delta and Alaska Airlines. With an average price for the route of $448 and an overall rating of 8.0, Delta is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $461 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from Portland to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Portland to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Portland to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Portland is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Portland to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Portland with another airline. Booking your flights between Portland and STL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Portland to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Portland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding a cheap flight from PDX to St. Louis

  • Located in the northwestern United States, the Portland International Airport (PDX) is a focus city for Alaska Airlines and Horizon Air. Serving as a hub for a few regional airlines, the St. Louis Lambert International Airport (STL) is located in the center of the midwest.
  • Delta, Frontier, American, and United are among the airlines that offer flights from PDX to STL with one stop. The layover is in cities such as Dallas, Phoenix, Denver, Seattle, Atlanta, Las Vegas, Minneapolis, Chicago, or Los Angeles. Alaska, Spirit,
  • Portland Airport has over 20 teams of therapy dogs and their experienced handlers who roam Departures to bring delight, distraction, and comfort to traveler's waiting for their flight.
  • If you are looking for something interesting to do as you wait for your flight to St. Louis, consider going to the Hollywood Theater, located on the C Concourse at PDX. At this small theater, you can watch short films created by Oregon filmmakers for free.
  • If you need a quiet place to decompress at STL, consider taking advantage of one of the two interfaith chapels at the St. Louis Airport. In these quiet spaces, you can relax, meditate, pray, or recoup. Along with prayer rugs and prayer books, these interfaith chapels offer religious services, empathetic listening, and spiritual guidance.
See more tips

Prefer to fly non-stop from Portland to St. Louis?

Find which airlines fly direct from Portland to Lambert-St Louis, which days they fly and book direct flights.

Nonstop departures

Portland to Lambert-St Louis

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Nonstop returns

Lambert-St Louis to Portland

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights
See more direct flights

Top 5 airlines serving from Portland to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Portland to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Portland to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 9128 reviews
7.9Comfort
8.2Boarding
7.3Food
8.6Crew
7.3Entertainment
Airline reviews

My boarding pass birthdate was printed incorrectly causing me to spend an extra hour in a check-in and then again TSA line and to miss a chance to have dinner pre-flight. My window seat was given away and was replaced with a middle seat. I would have liked an opportunity to charge my phone and take advantage of movies but many of the departure gate chargers weren’t operational and I don’t know of an in-flight charging option, The flight left 45 late after trouble with unruly passengers, and I was glad staff removed them.

6.0 GoodAnonymous, Apr 2024PDX - SAN
Read more about Alaska Airlines reviews

My boarding pass birthdate was printed incorrectly causing me to spend an extra hour in a check-in and then again TSA line and to miss a chance to have dinner pre-flight. My window seat was given away and was replaced with a middle seat. I would have liked an opportunity to charge my phone and take advantage of movies but many of the departure gate chargers weren’t operational and I don’t know of an in-flight charging option, The flight left 45 late after trouble with unruly passengers, and I was glad staff removed them.

Horrible. I likely will have to spend several thousand dollars to rebook my international flights, due to their delays, plus a hotel in SF. I can’t wait to never fly them again!

Quick easy boarding. Airport was unprepared for early landing and we were waiting in the plane for 20 minutes before getting a gate.

It was so easy to board using my boarding pass on my iPhone, and I liked what I was given on the plane for food and drink, and everyone was very friendly.

dont re-route to San Jose. Re-route to closer airport. Provide shuttle bus to go to SFO, not just LYFT vouchers.

Staff seemed genuinely nice, not just going through the motions.

I would have rated the entire experience much better were it not for two things: 1. There was inconsistency between what we were told once on the plane vs. the answer I received to the question about "spreading out" from our assigned seats because the flight was sparsely populated, and the entire row we were in was empty but for us. I asked about one of us moving over one seat to make more room for us; before getting on the plane, I was told we could, which seemed like a sensible answer. Once on the plane, it was announced that we needed to stay in our assigned seats despite all of the empty space in our row, which seemed unneccessarily restrictive. 2. To add to the discomfort, we sat on the tarmac once the plane landed in Burbank for over half an hour waiting for a gate to become available. During that time we had to remain seated and buckled in, which was becoming more difficult as time dragged on, especially for my wife. If all of this was due to regulations, that may mitigate the sense of "needless" restriction somewhat, but it points to a need to make regulations less restrictive where it is not appropriate for the current conditions. The crew was not "nasty" about the restrictions, so I do not resent their actions, but it certainly would have been a much more pleasant flight if we had a few more options when it comes to comfort.

The seat side plug ins didn’t work in my row, and I ran out of things to do since my iPad and iPhone ran out of juice. The flight attendant offered me a free drink but I don’t drink. I suggested a free snack box instead and she just shrugged and walked off. Why do us non-drinkers get the short end of the stick?

Flight left two hours late with no real explanation and they inexplicably had the heat running on the flight as well

I like Alaska Air fine. Great crew. Late departure still arrived on time.

On time departure, smooth trip, flight attendant told through passengers the gate we would arrive at and the gate our outbound flight was departing from. Early arrival

Checking in at the airport the agent only booked the first keg of my trip and had my checked luggage going to the airport with a layover! Never was issued a boarding pass for the second leg or received sticker fir my checked bag. All was well in the end! Delta agents helped to resolve the situation!!!

Delayed due to an ill passenger after loading. Not preventable on Delta's part. Was in first class. The seats are becoming worn and detaching from their velcro attachments. Only got snacks on flight. The attendant was not the friendliest.

I would fly again the whole experience was great. The only feed back I can give that they don't do that American Airlines does is the crew there is more humorous with boarding and thank their passengers. It makes it more fun to fly with them. I would however fly Delta again.

From Atlanta to Cabo I would have hoped on a plane that size I would have been able to breathe and wiggle my feet a little! The leg room in that plane is non existent and I am only 5”4’. And the air vent either wasn’t working very well or just could not blow air from the ceiling to the seat area as I was suffocating through the entire flight! And please don’t say I would have been more comfortable in first class because I cannot afford those rates and have always travelled Main Cabin without issues !

The pilots were good. Disappointing when planes don't have electrical ports

I liked the piloting of the aircraft. Very disappointed about lack of electrical ports. Also, although a short flight. there was enough time to hand out snacks to comfort + seats as was done for first class.

I had a wonderful experience flying with delta. The gentleman taking care of us on our flight was so nice, accommodating, and attentive. He always was smiling and giving pins to the kids which made me smile. The flight was quick too and without turbulence. Thank you for the great flying experience.

Delta is one of the best airlines I have flown

Made the Atlanta to Pittsburgh trip many times, with Delta no issues

I paid $380 for my one-way ticket from California to Minnesota. The fair did not include online check-in. I received instructions from their app to check in at a kiosk. At the kiosk, the boarding pass would not print until an actual person came to verify that I had a personal item and not a carry-on item, On the plane, the person next to me was drunk and allowed to continue to order alcohol. United is garbage I’d rather fly spirit.

The plane was dirty and the in seat air wasn't blowing as planes usually do.

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the locked room where it was being kept.

Do not like the feeling of being in the basic economy. Everyone should feel good no matter what.

All flights were on time and boarding was issue free

Terrible! The plane was old and you are required to connect your own device to their Wi-Fi rather than have entertainment options in the back of the seat in front of you. The Wi-Fi went out during the flight and there was only one plug for the devices every two seats. Three out of five surrounding my family did not work. The seats and spaces under them were so small I could not fit my backpack, which I’ve always brought on flights and fit before no problem. The crew were unpleasant and patronizing.

Great! The plane was decently sized and comfortable. The staff was nice and there was great in flight entertainment

Water service would be great. The way they board is terrible. Slow passengers first😂😂 They need to smart up a bit

Our original business class flight was cancelled so we not only downgraded but we were also spread out across the plane not sitting together in separate middle seats. My poor kids were scared and couldn’t see me on the flight and the crew wasn’t sensitive to the situation and what the airlines did to us. Very dissatisfied with United airlines.

Crew were fine, drinks and snacks were as well but we were delayed for around 2 hrs which made our entry into Mexico delayed as well with the influx of arrivals at the same time. Sort of wasted our first day of vacation. We left Pittsburgh at 630am and did not arrive in Mexico until late dinner time.

All four American Airlines flights I took in last seven days were delayed. Caused me loads of problems, missed meetings, loss of time and money.

American cancelled our flight home. Zero option for hotel, alternative transportation and took 3 hours to find our bags so we could take a 3 hour UBER ride home on our dime. Never flying AA again.

They gave my seat away although it was a connecting flight with them and the flight was a bit delayed.

Flight was cancelled had to move to another gate late again no internet paid for the month and never can use it waste of money

Not being able to purchase my check in baggage online was a negative.

LATE LATE LATE!!! Plagued by late AA flights on this trip. Such a drag. This one was by far the worst.

WiFi connected but only let you go to the AA website, not even text messaging worked.

Too bad that first class seats do not recline significantly causing discomfort

Flight delayed over an over all day until it cancelled at 1:30am. Would not repeatedly delay that late. Offer hotel rooms and rebook early. Very difficult for families with small children

this is starting to seem like an american airlines standard. delayed flights and fake apologies… getting tired of it

Six hour delay. Poor customer service. No voucher. Bad communication. Missed important appointments.

Our flight was delayed an hour, then when we got to board our flight finally, we were waiting in our seats for take off for 45 minutes before it was communicated that there was a maintenance issue therefore we waited on the plane for over an hour while that was resolved. We did not get to Phoenix until almost 3 hours after we were originally supposed to. This was the first and last time I will be flying Frontier.

Flight was canceled with little warning. Flight was rebooked through Ontario, California and connecting flight was delayed by over three hours. Frontier is living up to their Greyhound of the skies reputation for sure.

I purchased a carry on bag online…was supposed to cost $72 but after a whole slew of bs charges, the total was over $175.00. Because of these hidden charges, I will not even consider flying Frontier ever again. It’s just not worth the hassle. I’m scratching this company off my list forever.

Flight was OK. Seats were good no cell phone charges on the plane no TVs or entertainment.

There were 3 leg for the trip and each leg was delayed by 90 minutes or more. The boarding process takes forever with people waiting on the jetway even though most folks do not have carry-on. The whole process is poorly managed.

Flight cancelled and was told by a rude gate agent that they don’t accommodate on other airlines. Had to wait 5 hours for a connecting flight that had a 7 hour layover. Would not allow bags to be checked early so we couldn’t go through security .Had to rent a car for the afternoon to store bags and get a meal. Also incurred a hotel fee. No apology or reason given for the cancellation- just rudeness.

They cancelled the flight then did nothing to help us rebook. It was awful - I won’t fly with them again

The process of buying the ticket and navigating all the hidden charges that Frontier throws at you was a terrible experience. The actual airport experience and flying was fine.

The truck that was refueling the plane drove away with the hose still connected to the plane and ripped part of the plane off with it

Book cheap flights from Portland to St. Louis

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Portland to St. Louis found on KAYAK in the last 72 hours.
5/21Tue
1 stopSpirit Airlines
16h 49mPDX-STL
$51
5/12Sun
1 stopFrontier
6h 48mPDX-STL
$85
5/26Sun
1 stopFrontier
9h 19mPDX-STL
$89
6/21Fri
1 stopDelta
8h 04mPDX-STL
$140
7/19Fri
1 stopAmerican Airlines
6h 30mPDX-STL
$204
5/21Tue
2 stopsAlaska Airlines
25h 09mPDX-STL
$258
6/3Mon
1 stopDelta
8h 30mPDX-STL
$335
6/7Fri
2 stopsUnited Airlines
18h 34mPDX-STL
$447
6/5Wed
2 stopsUnited Airlines
18h 10mPDX-STL
$457
6/8Sat
2 stopsAmerican Airlines
11h 27mPDX-STL
$586

Search by stops

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Last minute flights from Portland to St. Louis

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Portland to St. Louis that are departing in the next 10 days.
5/8Wed
multi-stopFrontier
7h 39mPDX-STL
5/11Sat
multi-stopFrontier
15h 24mSTL-PDX
$179
5/8Wed
multi-stopFrontier
7h 39mPDX-STL
5/12Sun
multi-stopFrontier
12h 11mSTL-PDX
$187
5/8Wed
multi-stopFrontier
7h 39mPDX-STL
5/12Sun
multi-stopFrontier
12h 11mSTL-PDX
$188
5/4Sat
multi-stopAmerican Airlines
6h 57mPDX-STL
5/10Fri
multi-stopAmerican Airlines
8h 44mSTL-PDX
$284
5/7Tue
multi-stopAlaska Airlines
6h 23mPDX-STL
5/11Sat
multi-stopAlaska Airlines
8h 07mSTL-PDX
$286
5/7Tue
multi-stopAmerican Airlines
9h 58mPDX-STL
5/9Thu
multi-stopAmerican Airlines
7h 38mSTL-PDX
$290
5/6Mon
multi-stopDelta
5h 15mPDX-STL
5/9Thu
multi-stopDelta
7h 13mSTL-PDX
$292
5/4Sat
multi-stopDelta
5h 46mPDX-STL
5/9Thu
multi-stopDelta
7h 13mSTL-PDX
$313
5/4Sat
multi-stopUnited Airlines
13h 15mPDX-STL
5/10Fri
multi-stopUnited Airlines
7h 54mSTL-PDX
$492
5/7Tue
multi-stopUnited Airlines
12h 55mPDX-STL
5/8Wed
multi-stopUnited Airlines
7h 38mSTL-PDX
$549

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Portland - St. Louis Flights

Departure:

Portland (PDX)United States

Destination:

St. Louis (STL)United States

Return flight deals:

St. Louis - Portland

Cabin classes: