$120 Find Cheap Flights from St. Louis to Oregon

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Oregon departing on 9/10. 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
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Oregon

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Oregon.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Oregon.
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Flight Deals

Cheap Flights from St. Louis to Oregon

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Portland
Portland1 stop$289
Eugene
Eugene1 stop$349
Redmond
Redmond1 stop$425
Medford
Medford1 stop$425
Boise
Boise1 stop$254
Portland
Portland1 stop$289
Eugene
Eugene1 stop$349
Redmond
Redmond1 stop$425
Medford
Medford1 stop$425
Boise
Boise1 stop$254

Book Cheap St. Louis to Oregon Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Oregon 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 for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Oregon

Wed, Jul 29 - Tue, Aug 11
Frontier Logo
8:08 pm - 12:29 pm
STL
-
BOI
17h 21m
1 stop
Frontier Logo
1:24 pm - 7:23 pm
BOI
-
STL
4h 59m
1 stop
$254Frontier
Thu, Jul 16 - Mon, Jul 20
Frontier Logo
7:10 pm - 4:54 pm
STL
-
PDX
23h 44m
1 stop
Frontier Logo
5:49 pm - 6:05 pm
PDX
-
STL
22h 16m
1 stop
$289Frontier
Sat, Aug 15 - Sat, Aug 22
Southwest Logo
8:30 am - 10:40 am
STL
-
PDX
4h 10mnonstop
Southwest Logo
10:45 pm - 11:50 am
PDX
-
STL
11h 05m
1 stop
$309Southwest
Tue, Sep 8 - Tue, Sep 15
Delta Logo
5:00 pm - 10:31 pm
STL
-
PDX
7h 31m
1 stop
Delta Logo
5:10 pm - 12:44 am
PDX
-
STL
5h 34m
1 stop
$319Delta
Tue, Oct 20 - Tue, Oct 27
Delta Logo
7:55 pm - 11:53 pm
STL
-
EUG
5h 58m
1 stop
Delta Logo
4:40 pm - 12:36 am
EUG
-
STL
5h 56m
1 stop
$349Delta
Wed, Nov 11 - Sat, Nov 14
Southwest Logo
6:30 am - 12:55 pm
STL
-
EUG
8h 25m
2 stops
Southwest Logo
1:20 pm - 8:25 pm
EUG
-
STL
5h 05m
1 stop
$350Southwest
Mon, Aug 10 - Sat, Aug 15
United Airlines Logo
1:38 pm - 9:53 pm
STL
-
BOI
9h 15m
2 stops
United Airlines Logo
2:44 pm - 8:46 pm
BOI
-
STL
5h 02m
1 stop
$374United Airlines
Sat, Aug 1 - Sat, Aug 8
United Airlines Logo
5:10 am - 9:53 am
STL
-
BOI
5h 43m
1 stop
United Airlines Logo
5:46 pm - 11:47 pm
BOI
-
STL
5h 01m
1 stop
$375United Airlines
Tue, Oct 20 - Wed, Oct 21
Alaska Airlines Logo
7:00 am - 1:12 pm
STL
-
EUG
8h 12m
1 stop
Alaska Airlines Logo
3:01 pm - 11:59 pm
EUG
-
STL
6h 58m
1 stop
$393Alaska Airlines
Tue, Oct 27 - Sat, Oct 31
Alaska Airlines Logo
7:00 am - 12:46 pm
STL
-
MFR
7h 46m
1 stop
Alaska Airlines Logo
1:23 pm - 11:59 pm
MFR
-
STL
8h 36m
1 stop
$425Alaska Airlines
Booking Insights

KAYAK's insights & trends for St. Louis to Oregon flights

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

How much is a round-trip flight from St. Louis to Oregon?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from St. Louis to Oregon departing in July.

What is the cheapest St. Louis to Oregon flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Oregon from St. Louis found in the last 5 days was to Portland, at $357 round-trip. The most popular route is from St. Louis (STL) to Portland (PDX), and the cheapest round-trip airline ticket found on this route in the last 5 days was $357.

What is the cheapest time of day to fly to Oregon?

The average price for all round-trip flights from St. Louis to Oregon depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Oregon is generally in the evening, when round-trip flights cost $445 on average. Morning departures are around 100% cheaper than evening flights, on average. The most expensive time of day to fly to Oregon is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $520.

Can I save money by flying with a layover from St. Louis to Oregon?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $462, prices are generally cheapest when you fly direct.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Oregon, 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 St. Louis to Oregon is December, when tickets cost $94 (return) on average. On the other hand, the most expensive months are November and May, when the average cost of round-trip tickets is $228 and $206 respectively.

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

The average price of all round-trip flights from St. Louis to Oregon clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from St. Louis to Oregon, look for departures on Tuesdays and avoid leaving on a Monday, as it's usually the priciest day. When flying back from Oregon, Friday is the cheapest day to fly and Sunday is the most expensive.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from St. Louis to Oregon, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from St. Louis to Oregon, you should book around 4 weeks before departure, which saves you about 52% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$120
Best time to beat the crowds but there is an average 1% increase in price.
Most popular time to fly with an average 3% increase in price.
Flight from St. Louis to Portland

FAQs - booking Oregon flights

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

    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 St. Louis to Oregon.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from St. Louis to Oregon 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 St. Louis to Oregon?

    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 from St. Louis to Oregon with an airline and back with another airline.

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

    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 from St. Louis to Oregon up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from St. Louis to Oregon

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Oregon. 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 St. Louis to Oregon? 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.
7.9
Alaska AirlinesOverall score based on 12590 reviews
8.1Boarding
7.0Food
7.8Comfort
7.0Entertainment
8.5Crew
Airline reviews

Much better than flight from Portland to St Louis, as it was smaller and not confusing.

10.0 ExcellentDeidre, Jun 2026
STL - PDX
Read more Alaska Airlines reviews

Much better than flight from Portland to St Louis, as it was smaller and not confusing.

Made our reservations 6 months ago. When we arrived at the airport we were informed they no longer have assigned seating. We were placed in the last row next to the restrooms. Our seats did not recline. I do not like the fact you are assigning seats. I don’t feel it’s fair. People who make last minute reservations sit in the middle seats. It’s did Southwest now have assigned seating and you assign seats. Even Southwest was more fair than Alaska.

We took off on time and rose into the wild blue yonder safely, and landed at our destination safely eighteen minutes early. In between we enjoyed a smooth flight and wonderful service by a great crew. Flight attendants and pilots made sure the trip was a memorable and happy experience. Can’t beat that!

There was no food or entertainment. I was in the middle seat which was uncomfortable. The flight and crew were fine.

Much better experience than at SeaTac. No one yelled….all nice The microphone was working for boarding….unlike SeaTac BIGGEST BUMMER….GOT SEATED BACK BY THE BATHROOMS AND YOU IT SMELLED THE WHOLE TRIP. A BLESSING….is they … Left the lights and air on until we were unloaded….UNLIKE SEATAC TO ST. LOUIS….THEY TURNED THE LIGHTS AND AIR OFF IN ALMOST 100 degree weather…IT SUCKED!

We were lucky to be seated in an upgraded row and received free drinks!!

I understand bottom line but..... You have to get more room in the seats. Why not give full cans for the drink service, little things go a long way. Thank you

The plane was clean. The flight crew was friendly and helpful. The flight was smooth and the pilots kept everyone informed of our status, etc. It was my first flight on Alaska Airlines and it was great. I'll be choosing them again in the future.

The crew was excellent. The seats were very good. The flight crew kept us informed about environmental items, Yellowstone eg. Passengers were on time so all times were excellent.

Crew was friendly and professional. Offered multiple drink services. Handled this full flight with style and grace.

Snacks are always pretzels. Why can't you also offer peanuts ?

Only downside was the legroom and seat width, which is always a problem unless I spend more for a premium seat.

Very good. Sad to learn Southwest is going start to charge for bags

Exceptional crew! Friendly and professional. Pleasant attitude and treated everyone with respect.

The flight was promptly on schedule and Southwest delivered everything they promised. No excuses for any shortfalls just 100% ownership of their responsibilities and business. The boarding and seating policy is a complete shambles. What started out as a great idea when Southwest first hit the market has been turned into a disaster due to the lack of integrity in many of the people who fly Southwest and take advantage of Southwest generosity at the expense of their fellow passengers.

Crew was excellent - Plane was fine. Media was good, could use more kid shows; Not a fan of the brownie brittle -- snack could be slightly better.

Left on time and arrived early. Brand new plane and no parts missing. Comfortable seats. The actual Captain spoke prior to the flight and reassured everyone about safety. Crew was so nice and fun. Perfect flight!

Everything went smoothly and the plane wasn’t full. It was delayed though. The delay was increased due to a crew change which was frustrating.

Love Southwest! Always a good trip with a happy crew who goes out of their way to be kind and fun.

friendly staff for the most part. they thought we were going to have bad turbulence so no drink service. there wasn't any turbulence. Iwish you had a choice of snacks

From checking to boarding, it was a seamless experience. The service agents were so helpful. The flight crew was so pleasant.

Fast, lovely scenery, great info on the Delta flight screen about landmarks we were flying over. Great landing!

Delta needs to step its game up get a more reliable internet service. Internet service was non-existent for this flight.

Great flight with Delta! Boarding was quick and easy, the amenities were solid, and the plane was in great shape. The flight attendants had a fun, lively energy while staying professional. All in all, a smooth trip — even managed to catch up on some rest. Thanks, Delta!

My flight was canceled after being rescheduled for four days canceling my trip. Kayak and everyone affiliated with it I.e the airlines, and just fly have been excruciating to deal with. My trip to visit family had to be canceled as there was no way to make it. I am furious at all of you.

They delayed our flight because of bad weather in NY which was completely understandable. Then they cancelled our flight and a later flight that evening. The earliest we could fly was the next morning. We ended up buying last minute tickets on another airline and made it home slightly delayed but safely that evening. Delta kept saying it was weather related but if that was the case how did we make it back on another airline? The weather in NY was cloudy but not bad.

The Pilot was one of the best I've had, very informative about turbulence and got us to our destination early

The plane smelled like a sewer. Multiple passengers complained. It’s a safety and quality issue to clean these planes.

Friendly boarding crew. Better could have been a bit more substantial food for this 3 plus hour flight.

We were delayed 2 hours leaving STL. I had 20 mins from when we landed in SLC terminal A to make it to SLC terminal B. I had to actually run! thankfully I made my flight but 3/4 legs were delayed to some capacity.

Had a one hour delay due to mechanical issue. I didn’t think I’d be able to make my connecting flight, but they waited for me and greeted me when I arrived to help things run smooth.

Staff were good. My seat was in need of repair, but for a short flight was not problematic. Usual basic snack and drink setup that you'll find on any US carrier. Over, a decent, basic flight.

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

I will never book a flight through Cheap fare. They booked me from Portland Main . And would not give me a refund, so I bought 2 tickets one for 299. From Portland Main to ORD. Then I had to buy a ticket from Oregon PDX to ORD that was another 440. So Just so you know they even told me it was there fault but no refund. Bad bussniess. I did inform United but they said they couldn't help me due to the fact I booked through Cheap Tickets. Never again. And I'm spreding the word. I let everyone know at my 50th class reunion

Overall a very poor experience - booked premium economy tickets but due to last minute flight delays , all my itinery went for a toss and had to fly economy class with no access to lounge or any compensation by united airlines to make up for the flight delays . i had expected better experience than that from united.

Pilot Erika DeLong made us feel safe and at ease in a frankly scary time to be flying. Her warm smile and greeting and excellent command of the aircraft in foggy bumpy weather helped us all to calm our nerves and get us home safely.

Not enough room between rows and food was gross. $160 baggage charge?! Never again.

Onboarding - it would be great to see on the screen what group they were boarding. It was very confusing on who was boarding (even though they called it out) they were not clear and the space to board was strange.

Older plane. Food was really bad, almost not worth the effort. Huge difference with European based airlines.

American delayed the flight for a crew rest period. The delay occurred late in the evening - the earliest i can find is 10:20 pm. With a 6 am flight anyone on the flight would have already have been asleep (unless you are insane, a vampire or on drugs) and at least for me i was already on the way to the airport at 445 am the next morning when i discovered they delayed the flight until 9 am. Given the incoming flight was in the air at 6 pm the evening before this should have been figured out a lot more timely that was there only crew to use. Just frustrating given there is no consideration for customer experience anymore in flying.

Good crew and flight was on time. It’s a small plane with limited overhead luggage space. They said the overhead space was full and I had to check my bag. There was still space when I got on. Waiting for my checked luggage added 30 minutes to my trip. Not the end of the world but also not great.

Trip delayed for 2 hours because of rain. We boarded and have to get down the flight and reboard again.

No enough space plus only allowing one laggage instead of two like other airlines.

Qatar airways ,boarding arrangements at Hamid international airport could been better

Two flight changes before the scheduled flight. On the day of the flight, the flight was delayed, which caused the connecting flight to be missed. Then, I was directed to another airport (CUN) and traveled to Tulum. American gave a $12 voucher for lunch. The least expensive item on the menu at a Mexican restaurant was $9.99. Driving to Tulum was a bad auto crash, and traffic was delayed two-plus hours. The bottom line is that we should have been at the hotel at noon, but it ended up at 11:30 PM.

Miami lounges were overcrowded and we were unable to get in. We only had a short time. But the banks are too tight in all American hubs

Overall boarding and debarking is a joke. I dont even bring luggage anymore on trips because you can never allow them to be place then in the overhead bin or you have to pay or you check them which is even worse having to wait for your luggage on the tarmac.

First time flying internationally with AA and probably my last. Not military friendly at all. Didn't allow free checked bag for military family members (dependents) on orders like other airlines. We were charged $100 for baggage weight overage (5 lbs!)even though we had military orders allowing us extra.. Didn’t allow military members to board early. Inefficient and long wait time to board. Seats are smaller and more uncomfortable than other airlines.. no drink service for over 7 hrs of flight! After initial meal was served, the crew never offered a snack or drinks until the breakfast's was served 1 1/2 hrs before landing. Overall expensive and poor experience for the entire flight.

Boarding process was good. I was assigned the most rear (non-reclining) seat in both directions, which wasn't great.

Everything you need to know for your flight from St. Louis to Oregon

Information on your arrival and departure airports