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$308+ Cheap flights from Rock Springs to Seattle (RKS - SEA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/18. Fares are subject to change and may not be available on all flights or dates of travel.
RKS — SEA
Sep 1 — Sep 81
Tue 9/1
Tue 9/8
1 adult, Economy
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Cheap flight deals from Rock Springs to Seattle

Cheapest flights from Rock Springs to Seattle
Explore the most affordable flight options available from Rock Springs to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 2, 2026.

This United Airlines deal was found by Cheapflights users on 7/31. 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.
Fri 9/182:22 pm
RKS
-
SEA
1 stop7h 53m
United Airlines
Mon 9/215:00 am
SEA
-
RKS
1 stop7h 47m
United Airlines
Deal found 7/31$308
This United Airlines deal was found by Cheapflights users on 7/31. 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.
Fri 9/182:22 pm
RKS
-
SEA
1 stop7h 53m
United Airlines
Sun 9/205:00 am
SEA
-
RKS
1 stop7h 47m
United Airlines
Deal found 7/31$316
This United Airlines deal was found by Cheapflights users on 7/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/22:22 pm
RKS
-
SEA
1 stop7h 53m
United Airlines
Sun 10/185:00 am
SEA
-
RKS
1 stop7h 42m
United Airlines
Deal found 7/28$368
This United Airlines deal was found by Cheapflights users on 7/31. 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.
Sat 9/195:05 am
RKS
-
SEA
1 stop5h 56m
United Airlines
Wed 9/232:34 pm
SEA
-
RKS
1 stop6h 47m
United Airlines
Deal found 7/31$388

Find flight deals from Rock Springs to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Rock Springs (RKS) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 2, 2026.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$308
(United Airlines)
Provider with most accurate pricing for Rock Springs Sweetwater County-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Rock Springs Sweetwater County-Seattle/Tacoma Intl flights.
Search Deals
From Rock Springs Sweetwater County to Seattle/Tacoma Intl
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Rock Springs 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 August 2, 2026.
Use the filters below to find and compare flights from Rock Springs to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

Rock SpringsSeattle

RKS - SEA

RKSSEA

Rock Springs Sweetwater County

Sat 9/19

5:05 am-10:01 am

1 stop5h 56m

Seattle/Tacoma Intl

Wed 9/23

2:34 pm-10:21 pm

1 stop6h 47m

$388

Rock SpringsSeattle

RKS - SEA

RKSSEA

Rock Springs Sweetwater County

Fri 10/2

5:05 am-10:01 am

1 stop5h 56m

Seattle/Tacoma Intl

Sun 10/18

5:00 am-1:42 pm

1 stop7h 42m

$410

Rock SpringsSeattle

RKS - SEA

RKSSEA

Rock Springs Sweetwater County

Thu 9/10

5:05 am-7:14 pm

2 stops15h 09m

Seattle/Tacoma Intl

Sun 9/13

6:32 am-10:21 pm

2 stops14h 49m

$459
Cheapest one-way
Quickest one-way

Rock SpringsSeattle

RKS - SEA

RKSSEA

Rock Springs Sweetwater County

Sun 8/9

5:05 am-10:00 am

1 stop5h 55m

$418

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/1

Sorted by cheapest first
  • Most accurate provider: When it comes to deals on Rock Springs-Seattle flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Rock Springs-Seattle flight deals on Cheapflights vs. Expedia <90% of the time. Price accuracy is based on data collected from Rock Springs-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Rock Springs-Seattle flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Rock Springs-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Rock Springs to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Rock Springs 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.

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 August 2, 2026.
Read through reviews of airlines operating flights from Rock Springs to Seattle, such as United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,061 reviews

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Dawn,Aug 2026

ORD - DEN

I missed my connecting flight because our plane took off ten minutes late and then when we got to the airport another plane was in our shoot waiting to get fueled up and that took 30 minutes so I missed my connecting flight. I asked if I could get off and they assured me the plane would most likely wait for me since they know what time the planes get in because of an app. I was not happy. I had to wait till 7:25 to board the next flight and then that was delayed. Gates changed till 9:20. Terrible
United Airlines
7.4
Good
10,061 reviews
United Airlines
7.4
Good
10,061 reviews

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Dawn,Aug 2026

ORD - DEN

I missed my connecting flight because our plane took off ten minutes late and then when we got to the airport another plane was in our shoot waiting to get fueled up and that took 30 minutes so I missed my connecting flight. I asked if I could get off and they assured me the plane would most likely wait for me since they know what time the planes get in because of an app. I was not happy. I had to wait till 7:25 to board the next flight and then that was delayed. Gates changed till 9:20. Terrible

Related info for your journey

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

  • How long is the flight from Rock Springs to Seattle?

    For as low as $388, United Airlines can have you in Seattle from Rock Springs in 5h 56m. Airlines will cover a distance of 766 mi.

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

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

  • How can I find direct flights from Rock Springs to Seattle?

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

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

    Yes. Cheapflights offers flight deals from Rock Springs 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.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Renton
Tacoma
Lacey
Leavenworth
Olympia
Edmonds
Tukwila
Snoqualmie
Tumwater
Centralia
Puyallup
Kent
Ellensburg
Fife
Marysville
Ocean Shores
Lakewood
Lynnwood
Shoreline

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Top airline flying from Rock Springs to Seattle

Discover the top airline that operate flights from Rock Springs 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 August 2, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$238Average$403FlexibilityNo cancel feeOn-time69%

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