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$59+ Cheap flights from Riverside, CA to Seattle (SEA)

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 1/13. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — SEA
Jan 16 — Jan 231
Fri 1/16
Fri 1/23
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Riverside to Seattle/Tacoma Intl are usually found in January or February, booked 61 days in advance, depart on a Friday or Thursday and return on a Friday

Cheap flight deals from Riverside to Seattle

Cheapest flights from Riverside to Seattle
Explore the most affordable flight options available from Riverside to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 17, 2025.

This CheapOair deal was found by Cheapflights users on 12/16. 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 12/319:36 pmLAX - SEA
Nonstop3h 06mFrontier
Sun 1/41:25 pmSEA - LAX
1 stop26h 49mFrontier
Deal found 12/16$122
This Frontier deal was found by Cheapflights users on 12/15. 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 12/259:36 pmLAX - SEA
Nonstop3h 06mFrontier
Thu 1/16:00 amSEA - LAX
Nonstop2h 46mFrontier
Deal found 12/15$128
This Frontier deal was found by Cheapflights users on 12/15. 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 12/259:36 pmLAX - SEA
Nonstop3h 06mFrontier
Mon 1/56:00 amSEA - LAX
Nonstop2h 46mFrontier
Deal found 12/15$132
This Super.com deal was found by Cheapflights users on 12/15. 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 12/259:36 pmLAX - SEA
Nonstop3h 06mFrontier
Thu 1/155:43 pmSEA - LAX
Nonstop2h 48mFrontier
Deal found 12/15$137
This Frontier deal was found by Cheapflights users on 12/16. 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 12/259:36 pmLAX - SEA
Nonstop3h 06mFrontier
Thu 1/810:19 amSEA - LAX
Nonstop2h 44mFrontier
Deal found 12/16$153
This Kiwi.com deal was found by Cheapflights users on 12/15. 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 12/221:11 pmLAX - SEA
1 stop21h 00mFrontier
Thu 1/16:00 amSEA - LAX
Nonstop2h 46mFrontier
Deal found 12/15$154
This Frontier deal was found by Cheapflights users on 12/16. 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 12/259:36 pmLAX - SEA
Nonstop3h 06mFrontier
Fri 1/95:38 pmSEA - LAX
Nonstop2h 46mFrontier
Deal found 12/16$158
This Kiwi.com deal was found by Cheapflights users on 12/15. 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 12/221:11 pmLAX - SEA
1 stop21h 00mFrontier
Thu 1/155:43 pmSEA - LAX
Nonstop2h 48mFrontier
Deal found 12/15$164
This eDestinos deal was found by Cheapflights users on 12/15. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/259:58 pmLAX - SEA
1 stop12h 13mFrontier
Sun 1/185:43 pmSEA - LAX
Nonstop2h 48mFrontier
Deal found 12/15$168
This CheapOair deal was found by Cheapflights users on 12/17. 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 12/205:44 pmLAX - SEA
1 stop20h 10mFrontier
Mon 1/125:38 pmSEA - LAX
Nonstop2h 46mFrontier
Deal found 12/17$171
This Frontier deal was found by Cheapflights users on 12/16. 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.
Wed 12/319:36 pmLAX - SEA
Nonstop3h 06mFrontier
Fri 1/95:38 pmSEA - LAX
Nonstop2h 46mFrontier
Deal found 12/16$173

Find flight deals from Riverside to Seattle

Keep the following information in mind while searching for Riverside to Seattle flight deals. Data was last updated December 17, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$103
(Frontier)

One-way from

$59
(United Airlines)

Popular in

December

Cheapest in

January

Average price

$272
Provider with most accurate pricing for Los Angeles-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Seattle/Tacoma Intl flights.
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From Riverside to Seattle/Tacoma Intl
Search Deals
One-way flight from Riverside to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($3 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Riverside to Seattle 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 December 17, 2025.
Use the filters below to find and compare flights from Riverside to Seattle that are best for you.

Fly from

Riverside

Fly to

Seattle

Route

Depart

Return

Price

Los AngelesSeattle

LAX - SEA

LAXSEA

Los Angeles

Sat 1/10

8:25 am-12:40 pm

1 stop4h 15m

Seattle/Tacoma Intl

Wed 1/14

11:20 am-3:15 pm

1 stop3h 55m

$142

Los AngelesSeattle

LAX - SEA

LAXSEA

Los Angeles

Mon 1/26

6:48 pm-9:58 pm

Nonstop3h 10m

Seattle/Tacoma Intl

Wed 1/28

12:24 pm-3:23 pm

Nonstop2h 59m

$147

Los AngelesSeattle

LAX - SEA

LAXSEA

Los Angeles

Sat 1/17

7:20 am-10:17 am

Nonstop2h 57m

Seattle/Tacoma Intl

Sat 1/31

11:17 am-1:55 pm

Nonstop2h 38m

$157

Los AngelesSeattle

LAX - SEA

LAXSEA

Los Angeles

Thu 1/22

1:15 pm-4:29 pm

Nonstop3h 14m

Seattle/Tacoma Intl

Sat 1/24

9:00 am-11:59 am

Nonstop2h 59m

$158

Los AngelesSeattle

LAX - SEA

LAXSEA

Los Angeles

Fri 2/6

9:15 am-4:20 pm

1 stop7h 05m

Seattle/Tacoma Intl

Sat 2/7

8:15 pm-10:58 pm

Nonstop2h 43m

$161

Los AngelesSeattle

LAX - SEA

LAXSEA

Los Angeles

Wed 1/7

9:55 am-12:57 pm

Nonstop3h 02m

Seattle/Tacoma Intl

Sun 1/11

7:35 pm-10:21 pm

Nonstop2h 46m

$167

Los AngelesSeattle

LAX - SEA

LAXSEA

Los Angeles

Wed 1/14

1:56 pm-4:54 pm

Nonstop2h 58m

Seattle/Tacoma Intl

Wed 1/21

6:53 pm-9:36 pm

Nonstop2h 43m

$167

Los AngelesSeattle

LAX - SEA

LAXSEA

Los Angeles

Wed 2/25

11:45 am-2:44 pm

Nonstop2h 59m

Seattle/Tacoma Intl

Thu 3/5

9:50 am-12:35 pm

Nonstop2h 45m

$167

Los AngelesSeattle

LAX - SEA

LAXSEA

Los Angeles

Sat 1/17

1:34 pm-7:41 pm

1 stop6h 07m

Seattle/Tacoma Intl

Wed 1/21

11:35 am-5:22 pm

1 stop5h 47m

$176

Los AngelesSeattle

LAX - SEA

LAXSEA

Los Angeles

Fri 2/20

5:00 am-11:00 am

1 stop6h 00m

Seattle/Tacoma Intl

Sun 2/22

5:00 am-1:00 pm

1 stop8h 00m

$177

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 24 results
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Best time to book a flight from Riverside to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Riverside 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 Riverside to Seattle

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

Use this chart to determine the optimal time to book a round-trip flight from Riverside to Seattle. Price data was last updated on December 12, 2025.

Booking 61 days in advance of your planned departure date is, on average, the best time to get cheap flights from Riverside to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, January is the cheapest month in which you can book a flight from Riverside to Seattle (average of $38). Flying from Riverside to Seattle in July is currently the most expensive (average of $134). 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 R1V to SEA?

Find hourly flight availability from Riverside to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 17, 2025.

It’s optimal to fly from Riverside to Seattle in the morning. By choosing this option you can save up to 12% on the cost of your flight, compared to a flight in the evening.

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

Use this chart to determine the cheapest time to fly round-trip from Riverside to Seattle. Price data was last updated on December 13, 2025.

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

Weekly flight availability from Riverside to Seattle

Explore weekly flight availability from Riverside to Seattle. 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 December 17, 2025.

The most flights from R1V to SEA are scheduled on a Tuesday (102 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (2 on average).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated December 17, 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta, and Hawaiian Airlines from Riverside to Seattle. 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
11,473 reviews

Entertainment

7.0

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Alaska Airlines
8.0
Very good
11,473 reviews
Alaska Airlines
8.0
Very good
11,473 reviews

Entertainment

7.0

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Delta
7.9
Good
8,007 reviews
Alaska Airlines
8.0
Very good
11,473 reviews

Entertainment

7.0

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Hawaiian Airlines
7.8
Good
2,819 reviews
Alaska Airlines
8.0
Very good
11,473 reviews

Entertainment

7.0

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
United Airlines
7.4
Good
9,092 reviews
Alaska Airlines
8.0
Very good
11,473 reviews

Entertainment

7.0

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Frontier
5.8
Fair
3,082 reviews
Alaska Airlines
8.0
Very good
11,473 reviews

Entertainment

7.0

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.

Related info for your journey

Find useful and relevant information for your journey from Riverside to Seattle. 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 into for flights to Seattle from Riverside?

    If you book a flight to Seattle from Riverside, you will be flying to Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle. There are 45 flights from Riverside to Seattle/Tacoma Intl per day from 8 different airlines.

  • How popular is this Riverside to Seattle flight route?

    Within the past month, 336 users have taken a look at flights from Riverside to Seattle/Tacoma Intl.

  • How long is the flight from Riverside to Seattle?

    There are many flights that can get you from Riverside to Seattle in 2h 57m. Fly via Southwest, United Airlines, or Delta to get the fastest option. The distance from Riverside to Seattle is about 954 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Riverside to Seattle one-way?

    The cheapest airlines for a one-way flight from Riverside to Seattle are Frontier ($37), Spirit Airlines ($40), and Southwest ($78).

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

    No one likes to see their flight delayed. When booking a flight from Riverside to Seattle consider choosing Air New Zealand (96%), Virgin Australia (96%) or Avianca (96%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Riverside to Seattle?

    While on average a flight from Riverside to Seattle is generally $915, our data shows the cheapest flight currently is $72. When looking at the most popular route, (Los Angeles - Seattle/Tacoma Intl), you can expect to pay $77 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Riverside to Seattle 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 Riverside to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Riverside to Seattle (average of $38). Flying from Riverside to Seattle in July is currently the most expensive (average of $134). 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

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Edmonds
Lynnwood
Renton
Puyallup
Kirkland
Kent
Tukwila
Cle Elum
Marysville
Leavenworth
Fife
Aberdeen
Shoreline
Centralia
Federal Way

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Top 8 airlines flying from Riverside to Seattle

Discover the top 8 airlines that operate flights from Riverside to Seattle. 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 December 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$51Average$161FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$76Average$171FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$98Average$272FlexibilityNo cancel feeOn-time85%
DeltaCheapest$118Average$261FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$148Average$266FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$150Average$309FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$167Average$287FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$177Average$395FlexibilityNo cancel feeOn-time71%

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