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$85+ 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — SEA
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheapflights Tip: The best prices from Riverside to Seattle/Tacoma Intl are usually found in January or February, booked 58 days in advance, depart on a Friday or Saturday and return on a Thursday

Cheap flight deals from Riverside to Seattle

Keep the following information in mind while searching for Riverside to Seattle flight deals. Data was last updated September 15, 2025.

Round-trip from

$145
(Mytrip)

One-way from

$85
(CheapOair)

Popular in

July

Cheapest in

January

Average price

$237
From Riverside to Seattle/Tacoma Intl
Search Deals
One-way flight from Riverside to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 15% potential increase in price ($37 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 15, 2025.

This Flightnetwork deal was found by Cheapflights users on 9/15. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/3010:21 amLAX - SEA
1 stop27h 16mFrontier
Thu 11/61:08 pmSEA - LAX
1 stop18h 57mFrontier
Deal found 9/15$144
This Mytrip deal was found by Cheapflights users on 9/14. 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.
Fri 10/249:33 amLAX - SEA
1 stop5h 43mFrontier
Mon 10/272:31 pmSEA - LAX
1 stop9h 54mFrontier
Deal found 9/14$145
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 10/24:45 pmLAX - SEA
Nonstop2h 51mFrontier
Mon 10/61:47 pmSEA - LAX
1 stop6h 05mFrontier
Deal found 9/13$146
This CheapOair deal was found by Cheapflights users on 9/13. 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 10/34:45 pmLAX - SEA
Nonstop2h 51mFrontier
Sun 10/54:36 pmSEA - LAX
1 stop20h 32mFrontier
Deal found 9/13$147
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1210:39 amLAX - SEA
1 stop6h 12mFrontier
Sun 12/1411:41 amSEA - LAX
Nonstop2h 48mFrontier
Deal found 9/14$148
This Priceline deal was found by Cheapflights users on 9/13. 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.
Wed 10/11:37 pmLAX - SEA
1 stop9h 22mFrontier
Wed 10/81:02 pmSEA - LAX
Nonstop2h 49mFrontier
Deal found 9/13$149
This CheapOair deal was found by Cheapflights users on 9/13. 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.
Sun 9/286:35 amLAX - SEA
1 stop17h 55mFrontier
Mon 9/291:47 pmSEA - LAX
1 stop6h 05mFrontier
Deal found 9/13$151
This Frontier deal was found by Cheapflights users on 9/14. 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 11/74:41 pmLAX - SEA
Nonstop2h 56mFrontier
Mon 11/102:22 pmSEA - LAX
1 stop6h 05mFrontier
Deal found 9/14$152
This Priceline deal was found by Cheapflights users on 9/14. 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.
Sat 10/49:08 pmLAX - SEA
Nonstop2h 51mFrontier
Fri 10/101:02 pmSEA - LAX
Nonstop2h 49mFrontier
Deal found 9/14$153
This CheapOair deal was found by Cheapflights users on 9/14. 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 10/254:52 pmLAX - SEA
Nonstop2h 56mFrontier
Mon 10/278:43 pmSEA - LAX
1 stop16h 35mFrontier
Deal found 9/14$154
This Frontier deal was found by Cheapflights users on 9/14. 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 11/74:41 pmLAX - SEA
Nonstop2h 56mFrontier
Sat 11/89:08 amSEA - LAX
Nonstop2h 49mFrontier
Deal found 9/14$155

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 September 15, 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

Tue 1/6

12:05 pm-6:35 pm

1 stop6h 30m

Seattle/Tacoma Intl

Fri 1/9

2:05 pm-10:00 pm

1 stop7h 55m

$189

Los AngelesSeattle

LAX - SEA

LAXSEA

Los Angeles

Sat 12/13

3:45 pm-8:15 pm

1 stop4h 30m

Seattle/Tacoma Intl

Mon 12/15

8:10 am-12:20 pm

1 stop4h 10m

$192

Los AngelesSeattle

LAX - SEA

LAXSEA

Los Angeles

Tue 11/25

7:20 am-10:27 am

Nonstop3h 07m

Seattle/Tacoma Intl

Tue 12/2

2:11 pm-4:55 pm

Nonstop2h 44m

$197

Los AngelesSeattle

LAX - SEA

LAXSEA

Los Angeles

Thu 10/16

9:00 am-11:56 am

Nonstop2h 56m

Seattle/Tacoma Intl

Sun 10/19

6:35 am-9:20 am

Nonstop2h 45m

$197

Los AngelesSeattle

LAX - SEA

LAXSEA

Los Angeles

Tue 10/7

9:00 am-11:56 am

Nonstop2h 56m

Seattle/Tacoma Intl

Sat 10/11

6:35 am-9:20 am

Nonstop2h 45m

$197

Los AngelesSeattle

LAX - SEA

LAXSEA

Los Angeles

Fri 12/12

4:50 pm-11:10 pm

1 stop6h 20m

Seattle/Tacoma Intl

Sat 12/13

12:10 pm-6:50 pm

1 stop6h 40m

$197

Los AngelesSeattle

LAX - SEA

LAXSEA

Los Angeles

Tue 10/14

8:15 am-2:24 pm

1 stop6h 09m

Seattle/Tacoma Intl

Tue 10/21

5:26 pm-8:11 pm

Nonstop2h 45m

$198

Los AngelesSeattle

LAX - SEA

LAXSEA

Los Angeles

Wed 10/8

5:15 pm-8:07 pm

Nonstop2h 52m

Seattle/Tacoma Intl

Sun 10/12

6:30 am-9:15 am

Nonstop2h 45m

$217

Los AngelesSeattle

LAX - SEA

LAXSEA

Los Angeles

Sat 11/22

8:59 pm-11:57 pm

Nonstop2h 58m

Seattle/Tacoma Intl

Sun 11/23

7:50 pm-10:33 pm

Nonstop2h 43m

$217

Los AngelesSeattle

LAX - SEA

LAXSEA

Los Angeles

Tue 11/25

7:20 am-10:27 am

Nonstop3h 07m

Seattle/Tacoma Intl

Fri 11/28

12:20 pm-3:10 pm

Nonstop2h 50m

$217

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 21 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 September 12, 2025.

Booking 58 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 $238). Flying from Riverside to Seattle in June is currently the most expensive (average of $388). 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 September 15, 2025.

When flying from Riverside to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 September 14, 2025.

Travelers seeking maximum savings on their Riverside to Seattle flight should consider departing on Thursday afternoons when fares are most often at their lowest. Sunday at noon 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 September 15, 2025.

The most flights from R1V to SEA are scheduled on a Monday (128 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (81 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 September 15, 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta, and United 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
10,000 reviews

Entertainment

7.0

Boarding

8.1

Food

7.1

Comfort

7.8

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Boarding

8.1

Food

7.1

Comfort

7.8

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Delta
8.0
Very good
7,956 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Boarding

8.1

Food

7.1

Comfort

7.8

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
United Airlines
7.4
Good
8,931 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Boarding

8.1

Food

7.1

Comfort

7.8

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Spirit Airlines
6.3
Okay
8,016 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Boarding

8.1

Food

7.1

Comfort

7.8

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Frontier
5.8
Fair
3,173 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Boarding

8.1

Food

7.1

Comfort

7.8

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why

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 101 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, 317 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 56m. Fly via Southwest, Delta, or United Airlines 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 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 SAUDIA (96%), EL AL (93%) or Finnair (92%) 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 $529, our data shows the cheapest flight currently is $77. When looking at the most popular route, (Los Angeles - Seattle/Tacoma Intl), you can expect to pay $84 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 $238). Flying from Riverside to Seattle in June is currently the most expensive (average of $388). 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
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Lacey
Renton
Olympia
Kent
Federal Way
Cle Elum
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline

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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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$48Average$172FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$65Average$174FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$98Average$274FlexibilityNo cancel feeOn-time85%
DeltaCheapest$117Average$262FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$138Average$288FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$149Average$261FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$159Average$280FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$163Average$347FlexibilityNo cancel feeOn-time71%

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