$95 Find Cheap Flights from Portland to Riverside

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 Riverside departing on 5/15. 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

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Everything you should know

Cheapest round-trip
$143
Typical prices: $262-$157
Frontier
Tue 5/26Sat 5/30
PDX - LAX • 1 stop
Cheapest non-stop
$144
Typical prices: $263-$154
Frontier
Thu 5/7Mon 5/11
PDX - LAX • Non-stop
Arrival airport
You can't fly directly to Riverside. It is served by Los Angeles (LAX), located 59.4 miles from Riverside.
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Flight Deals
Useful Info
Flight Deals

Cheap Flights from Portland to Riverside (PDX-LAX)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portland to Riverside 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 Portland to Riverside

Tue, May 26 - Sat, May 30
Frontier Logo
5:46 pm - 12:16 am
PDX
-
LAX
6h 30m
1 stop
Frontier Logo
9:20 am - 11:50 am
LAX
-
PDX
2h 30mnonstop
$143Frontier
Thu, May 7 - Mon, May 11
Frontier Logo
5:31 pm - 8:14 pm
PDX
-
LAX
2h 43mnonstop
Frontier Logo
9:20 am - 11:50 am
LAX
-
PDX
2h 30mnonstop
$144Frontier
Fri, May 29 - Thu, Jun 4
Frontier Logo
12:35 pm - 3:36 pm
PDX
-
LAX
27h 01m
1 stop
Frontier Logo
9:20 am - 11:50 am
LAX
-
PDX
2h 30mnonstop
$145Frontier
Thu, May 7 - Fri, May 8
Frontier Logo
5:31 pm - 8:14 pm
PDX
-
LAX
2h 43mnonstop
Frontier Logo
9:20 am - 11:50 am
LAX
-
PDX
2h 30mnonstop
$146Frontier
Sat, May 23 - Sat, May 30
Multiple Airlines Logo
5:36 pm - 8:10 pm
PDX
-
LAX
2h 34mnonstop
Multiple Airlines Logo
9:20 am - 11:50 am
LAX
-
PDX
2h 30mnonstop
$147Multiple Airlines
Fri, Jun 5 - Mon, Jun 8
Frontier Logo
5:31 pm - 8:14 pm
PDX
-
LAX
2h 43mnonstop
Frontier Logo
9:20 am - 11:50 am
LAX
-
PDX
2h 30mnonstop
$148Frontier
Fri, May 1 - Fri, May 8
Frontier Logo
9:54 am - 12:19 pm
PDX
-
LAX
2h 25mnonstop
Frontier Logo
9:20 am - 11:50 am
LAX
-
PDX
2h 30mnonstop
$149Frontier
Thu, Jun 18 - Mon, Jun 22
Frontier Logo
5:42 pm - 8:11 pm
PDX
-
LAX
2h 29mnonstop
Frontier Logo
9:18 am - 11:41 am
LAX
-
PDX
2h 23mnonstop
$150Frontier
Mon, Apr 27 - Thu, Apr 30
Frontier Logo
11:48 am - 3:20 pm
PDX
-
LAX
27h 32m
1 stop
Frontier Logo
9:13 am - 11:50 am
LAX
-
PDX
2h 37mnonstop
$151Frontier
Wed, Apr 29 - Fri, May 8
Frontier Logo
12:38 pm - 11:14 pm
PDX
-
LAX
10h 36m
1 stop
Frontier Logo
9:20 am - 11:50 am
LAX
-
PDX
2h 30mnonstop
$152Frontier
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$95
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly with an average 8% increase in price.
Flight from Portland to Los Angeles

When to book flights from Portland to Riverside

Are your dates flexible? Find out the best times to travel from Portland to Riverside based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Flights from Portland to Riverside: the best tips from KAYAK users' own experiences

Insights shared by verified travelers who flew the route from Portland to Riverside 
CatlinFlew with Alaska Airlines
PDX
-
LAX
Jun 2025
New terminal at PDX is gorgeous & very easy. LAX is a horrible, stressful mess & worse than when I grew up there. Waited with confirmed reservation at Dollar rentals for 90 minutes with 3 clerks. ALLOW EXTRA TIME.
Verified travelerFlew with Alaska Airlines
PDX
-
LAX
Oct 2024
LAX is a large airport with long walking distances to exit in terminal 6.
Verified travelerFlew with Alaska Airlines
PDX
-
LAX
Jun 2024
Los Angeles airport has convenient entry & exit without long walks to & from the gates.

FAQs for booking flights from Portland to Riverside

  • Which airports will I be using when flying from Portland to Riverside?

    When flying out of Portland you’ll be using Portland. Riverside does not have its own airport so you’ll be flying into nearby Los Angeles airport, which is 59.4 mi away.

  • How long does a flight from Portland to Riverside take?

    Direct flights cover the 834 miles separating Portland and Riverside in about 2h 20m.

  • How many flights are there between Portland and Riverside?

    77 direct flights run between Portland and Riverside on a daily basis. On average, there are about 540 departures each week.

  • What’s the cheapest day of the week to fly between Portland and Riverside?

    Consider leaving on a Friday and avoid Tuesdays if you are looking for the best rates. For your return to Portland, you’ll find the best rates on Fridays and the most expensive ones on Tuesdays.

  • How does KAYAK find such low prices on flights from Portland to Riverside?

    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 Riverside.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Riverside 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 Riverside?

    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 Riverside with an airline and back to Portland with another airline.

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

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

  • Which airlines provide the cheapest flights from Portland to Riverside?

    In the last 72 hours, the cheapest one-way ticket between Portland and Riverside found on KAYAK was with Frontier for $43. Spirit Airlines offered a round-trip connection from $54 and Frontier from $67.

Top tips for finding cheap flights from Portland to Riverside

  • There is no airport in Riverside. Instead, you’ll be flying into Los Angeles Airport when flying between Portland and Riverside.
  • The cheapest flight from Portland to Riverside was found 80 days before departure, on average.
  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be February, March and April. The cheapest month to fly is September.

Reviews of the top 5 airlines serving Portland to Riverside

 
Need help choosing which airline to fly with from Portland to Riverside? 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 12234 reviews
7.0Entertainment
7.0Food
7.8Comfort
8.5Crew
8.1Boarding
Airline reviews

Generally Good. Outbound flight was marred by a continuously s creaming baby. Fortunately the flight was only 90 mins long it would be nice if people traveling with small childres could be centered in one part of the plane. Also, you need to adapt your servey to include a "not applicable " option for things like food and entertainment, which are not offered on shorter flights. I fily Alaska by choice as given all the cirumstances, I fel\el you do a good job.

6.0 GoodAnonymous, Apr 2026
PDX - SFO
Read more Alaska Airlines reviews

Generally Good. Outbound flight was marred by a continuously s creaming baby. Fortunately the flight was only 90 mins long it would be nice if people traveling with small childres could be centered in one part of the plane. Also, you need to adapt your servey to include a "not applicable " option for things like food and entertainment, which are not offered on shorter flights. I fily Alaska by choice as given all the cirumstances, I fel\el you do a good job.

Fine for a short flight. All went well. Snacks are lacking and I couldn’t hook up to wifi through the app, but it was fine.

Aircraft was freezing, cold air blowing on me the entire time and the individual fans were turned off.

Alaska used to be a top notch airline. With it's growth it is now in line with the big airlines. Not bad, not great.

Great. I did have a little issue getting into the Lounge, which is likely more an American Airlines issue. I did not carry my physical AAdvantage Executive credit card with me on this trip, which Admirals Club membership is a part of the benefits of having this card. The instructions on the AA website and the Citi cards website make it seem like you don't need the physical card, as both sites state you can enter with your boarding pass and driver's license. But both lounges said you were required to present the physical card (and not the digital version, via Apple Pay), as only the physical card says "Admirals Club" on the back.I also do not have a physical Admirals Club membership card, so while both lounges eventually let me in, both denied me entrance initially for this reason.

Everything from the time I booked my flight through to the end when I got home was smooth and wonderful. Service was great, the flight attendants were attentive and there were no outstanding delays.

Delayed and no entertainment? I also forgot my headphones and immediately reported it and have not heard back yet.

The crew was very friendly. Boarding was quick and efficient.

we waited for 50 minutes to check a bag and missed a flight. do better.

The flight crew was very professional and pleasant. Our flight was delayed 3 hours, but Kayak informed me in advance

While they turned off most cabin lights to allow people to sleep, I was bothered by how bright the side lights still were. It was still quite bright for me in a window seat, when I wish I could have slept!

One of the flight attendants was a little cranky. I appreciated the free wifi and plug to charge my laptop

WiFi didn’t work most of the time. The usb chargers would work only occasionally for 5 mins and wouldn’t charge after that. Had to keep trying repeatedly at each of the seats in the row.

The crew bent over backwards to thank us for flying and make us comfortable. The food service was quick and efficient. The Captain communicated and said goodbye and thank you as we departed. They really stood out!

Generally on time departures and arrivals, clean planes, sky miles membership provides great benefits (complimentary upgrades, etc).

my mom urmila patel needed a wheelchair which was not available on the curbside. she needed to walk almost 50 meters inside (at the risk of falling) and then had to wait in line to get a wheelchair (this is not ok). Once obtained she had to seat in it for 30-45 minutes for someone to take her in thru the checkin process (which was fairly smooth and easy). the lady who helped her with her checkin process was very courteous and helpful

Staff at the check-in counter were friendly, happy and helpful. They tagged our bags and sent us to “bag drop off” but were not very clear about where that was. The airport was busy we headed off in what we thought was the right direction until a gentleman waved us down and actually came after us. He was the baggage handler for Delta and recognized our “deer in the headlights “ look-he brought us to the right area (which was marked as the Southwest Airlines Drop Off) and sent us on our way. Wonderful guy, low key and working with a big smile on his face. Loved it. Loved him.

Arlene was a great flight attendant. I also liked how one of the other flight attendants gave us a heads up about snacks and asked everyone to remove their headphones when it was their turn to order. Good idea.

I haven’t flown economy in over 20 years but it was not bad. Room by my feet for my bag and seat was roomy enough. Surprised in a good way.

The cabin temperature was nice and cool. The wifi was not working.

The checking was disaster, the crew wasn't behave well. It took us two hours to check in, after that thr line at the TSA was long, we barely make the flight. Bad airline

I like that if they asked you to checked in a bag at the gate they give you priority to board

I liked the Starlink WiFi but didn't like how they said they were the only airline to offer a free meal and it turns out to be just a standalone sandwich and then charge for snacks to go with it. Rather have the free snacks like Southwest, but have the option to purchase a decent meal for a 5+ hour flight.

I like Hawaiian, it was great that they had good internet connection across the Pacific Ocean, thanks to Star Link satellites. The seating was comfortable, ( I was in economy ). Maybe I missed it, but I only got offered a beverage once. It was a nonstop flight KOA to SMF. I would take it again next time I go that way.

Previously flown Hawaiian Airlines on similar routes, I found Alaska Airlines to be noticeably more comfortable. The seats on Alaska Airlines provided better support and cushioning, which made a significant difference on the long flight to the islands. When you’re spending 5-6 hours in the air, seat comfort really matters, and Alaska Airlines delivered where it counts. After comparing both carriers, I’ve decided to book with Alaska Airlines for all my future Hawaii trips. The superior seat comfort alone makes it worth choosing Alaska over Hawaiian Airlines. If you’re planning a trip to Hawaii and prioritizing comfort, I’d recommend giving Alaska Airlines a try. You won’t be disappointed. Highly recommended for Hawaii travel!

I received several emails about my 3:10 flight. When I showed up to the airport at 12:30 to check my bags I was told the flight was actually at 1 pm. They grudgingly rebooked me for a flight at 5:22 to Vegas to get a connecting to LAX. I did find the gate for my original 3:10 flight but they were booked. I proceeded to receive status updates and gate change information for the 3:10 flight, even though I was apparently never supposed to be on that flight

The crew was EXTREMELY helpful And sweet and the flight was smooth!

The Kayak confirmation number did not work for checking in the day before. I checked in at 8.30 using my ticket number. When I arrived at the airport, I was informed that the flight was overbooked, and since I had checked in late, I did not have a seat. The Next flight was not until ten PM. I called my wife, who had been taking care of our kids all weekend, and she was upset, calling me a liar and telling me to stay in SD. It turned my weekend getaway into a nightmare! I blame the Kayak website and will not book flights using your app in the future.

One hour waiting time after boarding, but arrived in time. I am satisfied

Flying with Hawaiian Airlines is a treat! They have the best crew, food and drinks! I’ve always enjoyed flying with Hawaiian Airlines and will continue to use them!

Wifi was spotty. Tray table was very dirty when I sat down.

The WiFi would not connect enough for me to do my actual work. It permaspooled, disconnected, said it was connected, then wouldn't open an email... it was frustrating. I am not a tall person, 5'4" - and I felt cramped with little room to reach into my bag under the seat in front of me. I feel sorry for anyone taller than me having to fly. the one positive thing I will add, is the overhead bins are roomy enough to manage more bags than other carriers.

Going non stop to lax like I paid for. Not stopping in MCI for gas. Too long of delays

Delayed for mechanical and no updates on what was happening and how long the delay might be.

A first class seat should fit a fat person, and this doesn't. The trays in the armrest are less functional than an ordinary tray in the back of the seat.

The experience at checkin for my American Airlines flight from Sacramento to LAX was very good including the assistance I received in getting my bags checked in and boarding passes printed. Was pleasantly surprised the my bags were checked through all the way to my destination at Clark International Airport in Angeles, Philippines.

Smooth flight. From the early boarding and all were on board before departure time and arrived early in ONT. Great crew. Thank you!!!!

The flight was significantly delayed for 6.5 hours because of snow. There was no communication once the plane returned to the gate regarding when the flight would resume. Other flights were departing while our flight was being unloaded for reasons unknown. Our flight also seemed out of the queue regarding further deicing, refueling, and waiting to Taxi to the runway.

They are always late and seats was also not having working charger

did not have enough meal for first class passengers so offer us snack

They switched our terminal 3 times and we were delayed for four plus hours!!!

It was an early flight and most people napped/slept and the crew let us which was nice.

The crew acted like they had never done this and kept barking passive aggressive orders at people. + the security line + the delay + sitting on the tarmac for 2 hours + none of the apps or signage updating with correct times

More inflight connection. And leg space is horrible. And the paying for baggage I'd ridiculous!!!

My flight was originally from SAT to MCO connecting from MCO to ORD. We got diverted to ATL and than Frontier staff there was sooo un helpful first they said they couldn’t give us any accommodation since our flight first got delayed that cancelled and now it’s 221am and I am still in ATL since they said they need to create a new flight my final destination is ORD and I have been delayed twice and cancelled. With no real help the frontier app didn’t work no email updates over all such a horrible experience

There's no seats that lean back with little leg space i wad uncomfortable the entire flight. Your charges for extra baggage is despicable and costly!!

Remind customers of the need to have passport or new ID for boarding.

Flight was canceled. Most upsetting was message from Kayak, stating that the flight was canceled and click with Kayak for details regarding rebook, refund details. THERE'S NO INFORMATION PROVIDED BY KAYAK EXCEPT THAT FLIGHT IS CANCELED. AND NOW THIS SURVEY TO FIND OUT HOW WAS THE FLIGHT !!!!!!!

The flight never took off and we spent 7 hours at the airport

Gate not determined until I got to the airport - hard to plan the trip to the airport.

Everything you need to know for your flight from Portland to Riverside

Complete your trip to Riverside with a hotel stay or car rental