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$398+ 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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
RKS — SEA
May 9 — May 161
Sat 5/9
Sat 5/16
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 April 9, 2026.

This United Airlines deal was found by Cheapflights users on 4/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/55:15 am
RKS
-
SEA
1 stop5h 25m
United Airlines
Sat 5/93:40 pm
SEA
-
RKS
1 stop5h 35m
United Airlines
Deal found 4/5$398

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 April 9, 2026.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$398
(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 April 9, 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

Tue 5/5

2:15 pm-9:06 pm

1 stop7h 51m

Seattle/Tacoma Intl

Sat 5/9

5:02 am-1:30 pm

1 stop7h 28m

$398
Cheapest one-way
Quickest one-way

Rock SpringsSeattle

RKS - SEA

RKSSEA

Rock Springs Sweetwater County

Wed 4/15

2:15 pm-11:27 pm

2 stops10h 12m

$473

Rock SpringsSeattle

RKS - SEA

RKSSEA

Rock Springs Sweetwater County

Tue 4/14

5:15 am-11:12 pm

3 stops18h 57m

$733

Rock SpringsSeattle

RKS - SEA

RKSSEA

Rock Springs Sweetwater County

Thu 4/16

5:15 am-11:12 pm

3 stops18h 57m

$784

Rock SpringsSeattle

RKS - SEA

RKSSEA

Rock Springs Sweetwater County

Fri 4/17

5:15 am-11:12 pm

3 stops18h 57m

$874

Rock SpringsSeattle

RKS - SEA

RKSSEA

Rock Springs Sweetwater County

Sat 4/18

5:15 am-2:46 pm

3 stops34h 31m

$905

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/7

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 April 9, 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
9,554 reviews

Overall

7.4

Boarding

7.7

Entertainment

7.1

Food

6.6

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,554 reviews
United Airlines
7.4
Good
9,554 reviews

Overall

7.4

Boarding

7.7

Entertainment

7.1

Food

6.6

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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 $398, United Airlines can have you in Seattle from Rock Springs in 7h 51m. 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
Tacoma
Ocean Shores
Olympia
Kent
Lynnwood
Lacey
Edmonds
Leavenworth
Snoqualmie
Tumwater
Tukwila
Renton
Puyallup
Kirkland
Ellensburg
Fife
Lakewood
Issaquah
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 April 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$238Average$328FlexibilityNo cancel feeOn-time69%

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