$79+ 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 4/7. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LAX
Apr 1 — Apr 81
1 adult, Economy
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Find cheap flights from Portland to Riverside with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Portland to Riverside are usually found in September or May, booked 90 days in advance, depart on a Friday or Thursday and return on a Saturday
Cheap flight deals from Portland to Riverside
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Best
Last-minute
One-way
Cheapest flights from Portland to RiversideExplore 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 March 2, 2026.
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 March 2, 2026.
This Frontier deal was found by Cheapflights users on 2/26. 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.
Sat 3/1410:24 am
PDX
- LAX
Nonstop2h 25m
Frontier
Thu 3/199:20 am
LAX
- PDX
Nonstop2h 32m
Frontier
Deal found 2/26![Frontier logo]()
$124
This CheapOair deal was found by Cheapflights users on 2/27. 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.
Thu 6/412:13 pm
PDX
- LAX
Nonstop2h 32m
Frontier
Sun 6/74:00 pm
LAX
- PDX
1 stop5h 09m
Frontier
Deal found 2/27![Frontier logo]()
$125
This Super.com deal was found by Cheapflights users on 3/2. 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.
Fri 5/19:54 am
PDX
- LAX
Nonstop2h 25m
Frontier
Sun 5/39:13 am
LAX
- PDX
Nonstop2h 37m
Frontier
Deal found 3/2![Frontier logo]()
$126
This Kiwi.com deal was found by Cheapflights users on 2/27. 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.
Sat 3/2810:24 am
PDX
- LAX
Nonstop2h 25m
Multiple Airlines
Wed 4/81:57 pm
LAX
- PDX
Nonstop2h 33m
Multiple Airlines
Deal found 2/27![Multiple Airlines logo]()
$127
This Frontier deal was found by Cheapflights users on 3/2. 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 5/119:53 am
PDX
- LAX
Nonstop2h 25m
Frontier
Fri 5/159:20 am
LAX
- PDX
Nonstop2h 37m
Frontier
Deal found 3/2![Frontier logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 2/26. 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 8/1312:13 pm
PDX
- LAX
Nonstop2h 32m
Frontier
Fri 8/2111:43 am
LAX
- PDX
Nonstop2h 29m
Frontier
Deal found 2/26![Frontier logo]()
$129
This Frontier deal was found by Cheapflights users on 2/26. 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.
Fri 5/2212:13 pm
PDX
- LAX
Nonstop2h 32m
Frontier
Thu 5/2811:43 am
LAX
- PDX
Nonstop2h 29m
Frontier
Deal found 2/26![Frontier logo]()
$130
This Jettzy deal was found by Cheapflights users on 2/27. 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 Jettzy is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/142:37 pm
PDX
- LAX
Nonstop2h 29m
Hawaiian Airlines
Tue 4/217:00 am
LAX
- PDX
Nonstop2h 35m
Hawaiian Airlines
Deal found 2/27![Hawaiian Airlines logo]()
$131
This Priceline deal was found by Cheapflights users on 2/27. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/910:08 am
PDX
- LAX
Nonstop2h 25m
Frontier
Fri 3/206:21 pm
LAX
- PDX
Nonstop2h 27m
Frontier
Deal found 2/27![Frontier logo]()
$132
This Kiwi.com deal was found by Cheapflights users on 2/26. 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 4/209:54 am
PDX
- LAX
Nonstop2h 25m
Frontier
Fri 4/242:44 pm
LAX
- PDX
1 stop20h 58m
Frontier
Deal found 2/26![Frontier logo]()
$133
This Frontier deal was found by Cheapflights users on 2/28. 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.
Thu 3/129:53 am
PDX
- LAX
Nonstop2h 26m
Frontier
Sat 3/149:20 am
LAX
- PDX
Nonstop2h 32m
Frontier
Deal found 2/28![Frontier logo]()
$134
This CheapOair deal was found by Cheapflights users on 3/2. 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.
Thu 3/2610:08 am
PDX
- LAX
Nonstop2h 25m
Frontier
Wed 4/11:39 pm
LAX
- PDX
1 stop26h 45m
Frontier
Deal found 3/2![Frontier logo]()
$135
Best flights from Portland to RiversideDiscover carefully curated flight deals from Portland to Riverside that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 2, 2026.
Discover carefully curated flight deals from Portland to Riverside that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 2, 2026.
This Southwest deal was found by Cheapflights users on 2/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/187:30 am
PDX
- LAX
1 stop3h 40m
Southwest
Tue 4/212:20 pm
LAX
- PDX
2 stops6h 40m
Southwest
Deal found 2/28![Southwest logo]()
$158
This Delta deal was found by Cheapflights users on 2/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/135:18 pm
PDX
- LAX
Nonstop2h 26m
Delta
Sun 5/177:35 am
LAX
- PDX
Nonstop2h 22m
Delta
Deal found 2/26![Delta logo]()
$167
This Alaska Airlines deal was found by Cheapflights users on 2/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/110:31 am
PDX
- LAX
Nonstop2h 32m
Alaska Airlines
Tue 4/79:48 pm
LAX
- PDX
1 stop12h 02m
Alaska Airlines
Deal found 2/26![Alaska Airlines logo]()
$176
This United Airlines deal was found by Cheapflights users on 3/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/303:30 pm
PDX
- LAX
1 stop5h 25m
United Airlines
Mon 4/67:55 pm
LAX
- PDX
1 stop4h 46m
United Airlines
Deal found 3/1![United Airlines logo]()
$217
This Delta deal was found by Cheapflights users on 2/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/291:05 pm
PDX
- LAX
Nonstop2h 20m
Delta
Sun 5/37:40 am
LAX
- PDX
Nonstop2h 24m
Delta
Deal found 2/27![Delta logo]()
$167
This Delta deal was found by Cheapflights users on 2/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/161:45 pm
PDX
- LAX
Nonstop2h 23m
Delta
Sun 5/177:35 am
LAX
- PDX
Nonstop2h 22m
Delta
Deal found 2/27![Delta logo]()
$167
This Alaska Airlines deal was found by Cheapflights users on 3/1. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/87:14 am
PDX
- LAX
Nonstop2h 34m
Alaska Airlines
Wed 4/84:15 pm
LAX
- PDX
1 stop4h 17m
Alaska Airlines
Deal found 3/1![Alaska Airlines logo]()
$217
This Delta deal was found by Cheapflights users on 2/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/37:58 pm
PDX
- LAX
Nonstop2h 36m
Delta
Mon 4/67:55 pm
LAX
- PDX
Nonstop2h 28m
Delta
Deal found 2/28![Delta logo]()
$197
This Southwest deal was found by Cheapflights users on 3/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/266:00 am
PDX
- LAX
1 stop6h 15m
Southwest
Sat 5/309:50 am
LAX
- PDX
1 stop4h 05m
Southwest
Deal found 3/1![Southwest logo]()
$239
This Alaska Airlines deal was found by Cheapflights users on 2/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/35:30 pm
PDX
- LAX
1 stop16h 07m
Alaska Airlines
Mon 4/67:00 am
LAX
- PDX
Nonstop2h 35m
Alaska Airlines
Deal found 2/27![Alaska Airlines logo]()
$230
This Southwest deal was found by Cheapflights users on 2/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/288:05 am
PDX
- LAX
1 stop6h 20m
Southwest
Sat 4/47:15 pm
LAX
- PDX
1 stop5h 40m
Southwest
Deal found 2/26![Southwest logo]()
$248
This Delta deal was found by Cheapflights users on 3/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/285:40 pm
PDX
- LAX
Nonstop2h 24m
Delta
Tue 3/314:30 pm
LAX
- PDX
Nonstop2h 28m
Delta
Deal found 3/1![Delta logo]()
$257
Last-minute flights from Portland to RiversideDiscover last-minute flight deals from Portland to Riverside. Data last updated March 2, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Riverside. Data last updated March 2, 2026 and is based on user searches.
This Priceline deal was found by Cheapflights users on 2/27. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/910:08 am
PDX
- LAX
Nonstop2h 25m
Frontier
Fri 3/206:21 pm
LAX
- PDX
Nonstop2h 27m
Frontier
Deal found 2/27![Frontier logo]()
$132
This Frontier deal was found by Cheapflights users on 3/1. 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 3/910:08 am
PDX
- LAX
Nonstop2h 25m
Frontier
Sat 3/149:20 am
LAX
- PDX
Nonstop2h 32m
Frontier
Deal found 3/1![Frontier logo]()
$138
This Frontier deal was found by Cheapflights users on 2/28. 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.
Thu 3/129:53 am
PDX
- LAX
Nonstop2h 26m
Frontier
Sat 3/149:20 am
LAX
- PDX
Nonstop2h 32m
Frontier
Deal found 2/28![Frontier logo]()
$134
This Frontier deal was found by Cheapflights users on 2/26. 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.
Sat 3/1410:24 am
PDX
- LAX
Nonstop2h 25m
Frontier
Thu 3/199:20 am
LAX
- PDX
Nonstop2h 32m
Frontier
Deal found 2/26![Frontier logo]()
$124
This Kiwi.com deal was found by Cheapflights users on 2/28. 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 3/2610:08 am
PDX
- LAX
Nonstop2h 25m
Frontier
Thu 4/26:15 am
LAX
- PDX
1 stop28h 48m
Frontier
Deal found 2/28![Frontier logo]()
$125
This CheapOair deal was found by Cheapflights users on 3/2. 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.
Thu 3/2610:08 am
PDX
- LAX
Nonstop2h 25m
Frontier
Wed 4/11:39 pm
LAX
- PDX
1 stop26h 45m
Frontier
Deal found 3/2![Frontier logo]()
$135
This Kiwi.com deal was found by Cheapflights users on 2/27. 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 3/2610:08 am
PDX
- LAX
Nonstop2h 25m
Multiple Airlines
Sat 4/46:06 pm
LAX
- PDX
Nonstop2h 33m
Multiple Airlines
Deal found 2/27![Multiple Airlines logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 2/27. 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.
Sat 3/2810:24 am
PDX
- LAX
Nonstop2h 25m
Multiple Airlines
Sat 4/46:06 pm
LAX
- PDX
Nonstop2h 33m
Multiple Airlines
Deal found 2/27![Multiple Airlines logo]()
$127
This Kiwi.com deal was found by Cheapflights users on 2/28. 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.
Sat 3/2810:24 am
PDX
- LAX
Nonstop2h 25m
Frontier
Wed 4/11:39 pm
LAX
- PDX
1 stop26h 45m
Frontier
Deal found 2/28![Frontier logo]()
$129
This Flightnetwork deal was found by Cheapflights users on 3/2. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/3010:08 am
PDX
- LAX
Nonstop2h 25m
Frontier
Sun 4/54:59 pm
LAX
- PDX
Nonstop2h 32m
Frontier
Deal found 3/2![Frontier logo]()
$128
This Alaska Airlines deal was found by Cheapflights users on 2/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/312:37 pm
PDX
- LAX
Nonstop2h 29m
Alaska Airlines
Tue 4/77:00 am
LAX
- PDX
Nonstop2h 35m
Alaska Airlines
Deal found 2/27![Alaska Airlines logo]()
$137
One-way flights from Portland to RiversideSearch for one-way flight options from Portland to Riverside. Find affordable one-way fares based on user searches. Data last updated March 2, 2026.
Search for one-way flight options from Portland to Riverside. Find affordable one-way fares based on user searches. Data last updated March 2, 2026.
This CheapOair deal was found by Cheapflights users on 2/27. 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 4/72:30 pm
PDX
- LAX
1 stop3h 41m
Alaska Airlines
Deal found 2/27![Alaska Airlines logo]()
$79
This Frontier deal was found by Cheapflights users on 2/27. 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 4/2712:45 pm
PDX
- LAX
1 stop4h 29m
Frontier
Deal found 2/27![Frontier logo]()
$80
This Booking.com deal was found by Cheapflights users on 2/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/125:14 pm
PDX
- LAX
Nonstop2h 26m
Frontier
Deal found 2/27![Frontier logo]()
$81
This Kiwi.com deal was found by Cheapflights users on 2/26. 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 4/1311:58 am
PDX
- LAX
1 stop12h 14m
Frontier
Deal found 2/26![Frontier logo]()
$82
This Kiwi.com deal was found by Cheapflights users on 2/26. 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.
Sun 5/3112:13 pm
PDX
- LAX
Nonstop2h 32m
Frontier
Deal found 2/26![Frontier logo]()
$83
This CheapOair deal was found by Cheapflights users on 2/26. 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.
Wed 4/1510:50 am
PDX
- LAX
1 stop7h 21m
Alaska Airlines
Deal found 2/26![Alaska Airlines logo]()
$84
This Super.com deal was found by Cheapflights users on 2/26. 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.
Fri 4/1011:58 am
PDX
- LAX
1 stop12h 14m
Frontier
Deal found 2/26![Frontier logo]()
$85
This Expedia deal was found by Cheapflights users on 3/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2311:48 am
PDX
- LAX
1 stop12h 23m
Frontier
Deal found 3/1![Frontier logo]()
$86
This Kiwi.com deal was found by Cheapflights users on 2/27. 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 3/912:52 pm
PDX
- LAX
1 stop26h 20m
Multiple Airlines
Deal found 2/27![Multiple Airlines logo]()
$87
This Kiwi.com deal was found by Cheapflights users on 2/26. 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 3/239:53 pm
PDX
- LAX
1 stop15h 59m
Frontier
Deal found 2/26![Frontier logo]()
$88
This Delta deal was found by Cheapflights users on 2/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/288:15 pm
PDX
- LAX
Nonstop2h 26m
Delta
Deal found 2/27![Delta logo]()
$89
This Delta deal was found by Cheapflights users on 2/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/265:18 pm
PDX
- LAX
Nonstop2h 26m
Delta
Deal found 2/27![Delta logo]()
$90
Find flight deals from Portland to Riverside
Keep the following information in mind while searching for Portland to Riverside flight deals. Data was last updated March 2, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $124 (Frontier) |
One-way from | $79 (CheapOair) |
Popular in | November |
Cheapest in | September |
Average price | $227 |
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 March 2, 2026.
Use the filters below to find and compare flights from Portland to Riverside that are best for you.
Fly from
Fly to
Route
Depart
Return
PortlandLos Angeles
PDX - LAX
PDXLAX
Portland
Sat 4/18
7:30 am-11:10 am
1 stop3h 40m
Los Angeles
Tue 4/21
2:20 pm-9:00 pm
2 stops6h 40m
$158
PortlandLos Angeles
PDX - LAX
PDXLAX
Portland
Wed 5/13
5:18 pm-7:44 pm
Nonstop2h 26m
Los Angeles
Sun 5/17
7:35 am-9:57 am
Nonstop2h 22m
$167
PortlandLos Angeles
PDX - LAX
PDXLAX
Portland
Wed 4/29
1:05 pm-3:25 pm
Nonstop2h 20m
Los Angeles
Sun 5/3
7:40 am-10:04 am
Nonstop2h 24m
$167
PortlandLos Angeles
PDX - LAX
PDXLAX
Portland
Sat 5/16
1:45 pm-4:08 pm
Nonstop2h 23m
Los Angeles
Sun 5/17
7:35 am-9:57 am
Nonstop2h 22m
$167
PortlandLos Angeles
PDX - LAX
PDXLAX
Portland
Wed 4/1
10:31 am-1:03 pm
Nonstop2h 32m
Los Angeles
Tue 4/7
9:48 pm-9:50 am
1 stop12h 02m
$176
PortlandLos Angeles
PDX - LAX
PDXLAX
Portland
Fri 4/3
7:58 pm-10:34 pm
Nonstop2h 36m
Los Angeles
Mon 4/6
7:55 pm-10:23 pm
Nonstop2h 28m
$197
PortlandLos Angeles
PDX - LAX
PDXLAX
Portland
Mon 3/30
3:30 pm-8:55 pm
1 stop5h 25m
Los Angeles
Mon 4/6
7:55 pm-12:41 am
1 stop4h 46m
$217
PortlandLos Angeles
PDX - LAX
PDXLAX
Portland
Wed 4/8
7:14 am-9:48 am
Nonstop2h 34m
Los Angeles
Wed 4/8
4:15 pm-8:32 pm
1 stop4h 17m
$217
PortlandLos Angeles
PDX - LAX
PDXLAX
Portland
Fri 4/3
5:30 pm-9:37 am
1 stop16h 07m
Los Angeles
Mon 4/6
7:00 am-9:35 am
Nonstop2h 35m
$230
PortlandLos Angeles
PDX - LAX
PDXLAX
Portland
Tue 5/26
6:00 am-12:15 pm
1 stop6h 15m
Los Angeles
Sat 5/30
9:50 am-1:55 pm
1 stop4h 05m
$239
Showing 1-10 of 24 resultsSorted by cheapest first
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.
PDX-LAX
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
PDX-R1V
PDX-LAX
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 February 27, 2026.
To ensure you get the cheapest price possible for a flight from Portland to Riverside, you should look to book at least 90 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, October is the cheapest month in which you can book a flight from Portland to Riverside (average of $50). Flying from Portland to Riverside in November is currently the most expensive (average of $107). 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 March 2, 2026.
It’s typically best to fly out from Portland to Riverside in the evening. Doing so could potentially save you 24% on the flight price compared to flying in the afternoon, 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 February 21, 2026.
Travelers seeking maximum savings on their Portland to Riverside flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday 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 March 2, 2026.
The most flights from PDX to R1V are scheduled on a Sunday (71 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (34 on average).
How much does it cost to fly round-trip from Portland to Riverside?
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 March 2, 2026.
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.
Boarding
8.1
Crew
8.5
Entertainment
7.0
Food
7.1
Overall
8.0
Comfort
7.8
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Boarding
8.1
Crew
8.5
Entertainment
7.0
Food
7.1
Overall
8.0
Comfort
7.8
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Boarding
8.1
Crew
8.5
Entertainment
7.0
Food
7.1
Overall
8.0
Comfort
7.8
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Boarding
8.1
Crew
8.5
Entertainment
7.0
Food
7.1
Overall
8.0
Comfort
7.8
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Boarding
8.1
Crew
8.5
Entertainment
7.0
Food
7.1
Overall
8.0
Comfort
7.8
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Boarding
8.1
Crew
8.5
Entertainment
7.0
Food
7.1
Overall
8.0
Comfort
7.8
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Complete your trip
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Alternative routes for Portland to Riverside
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Riverside by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Portland to Riverside by cabin class
Find flights from Portland to Riverside, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Portland and Riverside flights
Browse other Portland and Riverside flight options. Last updated on March 2, 2026.
Other flights from Portland
Browse through other flights departing from Portland. Flights are based on user searches made on Cheapflights and were last updated on March 2, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Portland to Riverside flights
Consider these flights traveling from Portland to Riverside.
Top 9 airlines flying from Portland to Riverside
Discover the top 9 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 March 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$49 | Average$156 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$54 | Average$164 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$83 | Average$220 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$88 | Average$241 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$141 | Average$245 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$142 | Average$242 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$148 | Average$317 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$156 | Average$256 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$158 | Average$278 | FlexibilityNo cancel fee | On-time63% |