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$64+ Cheap flights from Portland (PDX) to Riverside, CA

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/18. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LAX
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
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Cheapflights Tip: The best prices from Portland to Riverside are usually found in January or February, booked 57 days in advance, depart on a Friday or Thursday and return on a Saturday

Find flight deals from Portland to Riverside

Cheapest flights from Portland to Riverside
Explore the most affordable flight options available from Portland to Riverside. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 6, 2025.

This CheapOair deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/512:55 pmPDX - LAX
1 stop11h 34mFrontier
Mon 12/152:00 pmLAX - PDX
Nonstop2h 37mFrontier
Deal found 11/4$121
This Mytrip deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/69:48 amPDX - LAX
Nonstop2h 24mFrontier
Sun 12/73:30 pmLAX - PDX
1 stop17h 06mFrontier
Deal found 11/6$122
This Super.com deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/412:51 pmPDX - LAX
1 stop5h 49mFrontier
Sun 12/712:41 pmLAX - PDX
1 stop5h 50mFrontier
Deal found 11/6$123
This CheapOair deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1212:55 pmPDX - LAX
1 stop11h 34mFrontier
Mon 12/152:00 pmLAX - PDX
Nonstop2h 37mFrontier
Deal found 11/5$125
This Kiwi.com deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1710:03 amPDX - LAX
1 stop5h 19mFrontier
Sat 11/226:44 amLAX - PDX
1 stop8h 23mFrontier
Deal found 11/4$126
This CheapOair deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/181:26 pmPDX - LAX
1 stop10h 59mFrontier
Fri 11/216:23 pmLAX - PDX
1 stop19h 12mFrontier
Deal found 11/4$127
This CheapOair deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/89:31 amPDX - LAX
1 stop10h 34mFrontier
Wed 12/106:40 amLAX - PDX
1 stop29h 16mFrontier
Deal found 11/5$128
This CheapOair deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/151:21 pmPDX - LAX
Nonstop2h 26mFrontier
Fri 11/216:23 pmLAX - PDX
1 stop19h 12mFrontier
Deal found 11/6$131
This Kiwi.com deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/181:26 pmPDX - LAX
1 stop23h 52mFrontier
Sat 11/226:44 amLAX - PDX
1 stop8h 23mFrontier
Deal found 11/6$134
This Kiwi.com deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2512:39 pmPDX - LAX
Nonstop2h 22mFrontier
Wed 12/319:15 amLAX - PDX
1 stop5h 45mFrontier
Deal found 11/4$135
This Frontier deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/243:59 pmPDX - LAX
1 stop8h 10mFrontier
Mon 12/11:48 pmLAX - PDX
Nonstop2h 32mFrontier
Deal found 11/5$136

Cheap flight deals from Portland to Riverside

Keep the following information in mind while searching for Portland to Riverside flight deals. Data was last updated November 6, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$121
(CheapOair)

One-way from

$64
(CheapOair)

Popular in

November

Cheapest in

January

Average price

$237
Provider with most accurate pricing for Portland-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Los Angeles flights.
Search Deals
From Portland to Riverside
Search Deals
One-way flight from Portland to Riverside
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($21 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to Riverside that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 6, 2025.
Use the filters below to find and compare flights from Portland to Riverside that are best for you.

Fly from

Portland

Fly to

Riverside

Route

Depart

Return

Price

PortlandLos Angeles

PDX - LAX

PDXLAX

Portland

Wed 12/3

5:30 pm-7:55 pm

Nonstop2h 25m

Los Angeles

Wed 12/10

2:05 pm-4:35 pm

Nonstop2h 30m

$157

PortlandLos Angeles

PDX - LAX

PDXLAX

Portland

Sat 2/21

5:10 pm-7:36 pm

Nonstop2h 26m

Los Angeles

Sat 2/28

1:45 pm-4:14 pm

Nonstop2h 29m

$157

PortlandLos Angeles

PDX - LAX

PDXLAX

Portland

Thu 2/19

2:25 pm-10:40 pm

1 stop8h 15m

Los Angeles

Tue 2/24

7:25 am-1:25 pm

1 stop6h 00m

$159

PortlandLos Angeles

PDX - LAX

PDXLAX

Portland

Sat 1/24

2:38 pm-9:36 pm

1 stop6h 58m

Los Angeles

Sat 1/31

7:00 am-12:38 pm

1 stop5h 38m

$176

PortlandLos Angeles

PDX - LAX

PDXLAX

Portland

Wed 12/24

2:47 pm-5:24 pm

Nonstop2h 37m

Los Angeles

Fri 1/2

7:55 pm-10:24 pm

Nonstop2h 29m

$177

PortlandLos Angeles

PDX - LAX

PDXLAX

Portland

Wed 12/24

1:30 pm-3:49 pm

Nonstop2h 19m

Los Angeles

Wed 12/31

8:25 am-11:01 am

Nonstop2h 36m

$177

PortlandLos Angeles

PDX - LAX

PDXLAX

Portland

Fri 12/26

9:45 pm-12:22 am

Nonstop2h 37m

Los Angeles

Sat 12/27

7:55 pm-10:24 pm

Nonstop2h 29m

$177

PortlandLos Angeles

PDX - LAX

PDXLAX

Portland

Wed 12/31

2:47 pm-5:24 pm

Nonstop2h 37m

Los Angeles

Mon 1/5

7:24 pm-10:01 pm

Nonstop2h 37m

$177

PortlandLos Angeles

PDX - LAX

PDXLAX

Portland

Sat 2/14

9:30 pm-11:59 pm

Nonstop2h 29m

Los Angeles

Sat 2/21

10:36 am-4:50 pm

1 stop6h 14m

$187

PortlandLos Angeles

PDX - LAX

PDXLAX

Portland

Sat 1/10

9:40 am-1:30 pm

1 stop3h 50m

Los Angeles

Thu 1/15

6:10 am-1:45 pm

1 stop7h 35m

$188

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

Showing 1-10 of 20 results
1
2

Best time to book a flight from Portland to Riverside

Have a flexible travel schedule? Discover the best time to fly to Riverside from Portland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

How far ahead should I book a flight from Portland to Riverside?

Use this chart to determine the optimal time to book a round-trip flight from Portland to Riverside. Price data was last updated on October 31, 2025.

To ensure you get the cheapest price possible for a flight from Portland to Riverside, you should look to book at least 57 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Portland to Riverside?

Currently, January is the cheapest month in which you can book a flight from Portland to Riverside (average of $49). Flying from Portland to Riverside in July is currently the most expensive (average of $89). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PDX to R1V?

Find hourly flight availability from Portland to Riverside. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 6, 2025.

It’s typically best to fly out from Portland to Riverside in the afternoon. Doing so could potentially save you 6% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from Portland to Riverside?

Use this chart to determine the cheapest time to fly round-trip from Portland to Riverside. Price data was last updated on November 2, 2025.

Travelers seeking maximum savings on their Portland to Riverside flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Wednesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Portland to Riverside

Explore weekly flight availability from Portland to Riverside. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated November 6, 2025.

The most flights from PDX to R1V are scheduled on a Thursday (67 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (24 on average).

Reviews of airlines servicing Riverside

Get insights into the airlines that provide service to Riverside. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Riverside. Reviews last updated November 6, 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta, and Hawaiian Airlines from Portland to Riverside. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,246 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
11,246 reviews
Alaska Airlines
8.0
Very good
11,246 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
7.9
Good
8,001 reviews
Alaska Airlines
8.0
Very good
11,246 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Hawaiian Airlines
7.8
Good
2,804 reviews
Alaska Airlines
8.0
Very good
11,246 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
American Airlines
7.2
Good
11,040 reviews
Alaska Airlines
8.0
Very good
11,246 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Frontier
5.8
Fair
3,116 reviews
Alaska Airlines
8.0
Very good
11,246 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

Related info for your journey

Find useful and relevant information for your journey from Portland to Riverside. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Portland to Riverside?

    If you book a flight to Riverside from Portland, you will be flying from Portland, which is the city’s only airport. Portland (PDX) is located 6.0 mi from the center of Portland. There are 43 flights from Portland to Riverside per day from 8 different airlines.

  • How popular is this Portland to Riverside flight route?

    Flights from Portland to Riverside have been viewed 210 times in the past calendar month.

  • How long is the flight from Portland to Riverside?

    There are many flights that can get you from Portland to Riverside in 2h 25m. Fly via Delta, Southwest, or Alaska Airlines to get the fastest option. There are 834 mi between Portland and Riverside. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most reliable airlines from Portland to Riverside?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Portland to Riverside on time: Singapore Airlines (100%), SAUDIA (100%), Horizon Air (100%).

  • What are the cheapest flights from Portland to Riverside?

    While on average a flight from Portland to Riverside is generally $456, our data shows the cheapest flight currently is $57. When looking at the most popular route, (Portland - Los Angeles), you can expect to pay $95 for that flight.

  • Can I find deals for flights from Portland to Riverside that include hotel bookings?

    Yes. In addition to deals on Portland to Riverside flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Riverside?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Riverside.

  • Can I find deals for business class flights from Portland to Riverside?

    Yes. Cheapflights offers flight deals from Portland to Riverside by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Portland to Riverside?

    Currently, January is the cheapest month in which you can book a flight from Portland to Riverside (average of $49). Flying from Portland to Riverside in July is currently the most expensive (average of $89). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 8 airlines flying from Portland to Riverside

Discover the top 8 airlines that operate flights from Portland to Riverside. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$54Average$145FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$83Average$180FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$88Average$268FlexibilityNo cancel feeOn-time85%
DeltaCheapest$93Average$276FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$147Average$290FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$148Average$308FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$158Average$311FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$158Average$342FlexibilityNo cancel feeOn-time69%

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