HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

$367+ 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 5/13. Fares are subject to change and may not be available on all flights or dates of travel.
RKS — SEA
May 29 — Jun 51
Fri 5/29
Fri 6/5
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Rock Springs to Seattle 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.

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 29, 2026.

This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/135:15 am
RKS
-
SEA
1 stop5h 25m
United Airlines
Sun 5/173:40 pm
SEA
-
RKS
1 stop5h 35m
United Airlines
Deal found 4/27$367
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Sat 5/162:15 pm
RKS
-
SEA
2 stops11h 57m
United Airlines
Sun 5/315:07 am
SEA
-
RKS
1 stop7h 24m
United Airlines
Deal found 4/28$379
This United Airlines deal was found by Cheapflights users on 4/25. 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 5/22:15 pm
RKS
-
SEA
1 stop7h 51m
United Airlines
Fri 5/155:05 am
SEA
-
RKS
1 stop7h 25m
United Airlines
Deal found 4/25$438
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Thu 5/282:16 pm
RKS
-
SEA
1 stop9h 54m
United Airlines
Sun 5/317:54 pm
SEA
-
RKS
1 stop25h 21m
United Airlines
Deal found 4/28$492
This United Airlines deal was found by Cheapflights users on 4/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/182:16 pm
RKS
-
SEA
1 stop9h 54m
United Airlines
Fri 6/265:00 am
SEA
-
RKS
1 stop7h 31m
United Airlines
Deal found 4/26$608

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 29, 2026.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$367
(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 29, 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

Wed 5/13

5:15 am-9:40 am

1 stop5h 25m

Seattle/Tacoma Intl

Sun 5/17

3:40 pm-10:15 pm

1 stop5h 35m

$367

Rock SpringsSeattle

RKS - SEA

RKSSEA

Rock Springs Sweetwater County

Sat 5/16

2:15 pm-1:12 am

2 stops11h 57m

Seattle/Tacoma Intl

Sun 5/31

5:07 am-1:31 pm

1 stop7h 24m

$379

Rock SpringsSeattle

RKS - SEA

RKSSEA

Rock Springs Sweetwater County

Thu 5/28

2:16 pm-11:10 pm

1 stop9h 54m

Seattle/Tacoma Intl

Sun 5/31

7:54 pm-10:15 pm

1 stop25h 21m

$492

Rock SpringsSeattle

RKS - SEA

RKSSEA

Rock Springs Sweetwater County

Thu 6/18

2:16 pm-11:10 pm

1 stop9h 54m

Seattle/Tacoma Intl

Fri 6/26

8:45 am-10:15 pm

2 stops12h 30m

$614

Rock SpringsSeattle

RKS - SEA

RKSSEA

Rock Springs Sweetwater County

Wed 8/5

5:05 am-10:00 am

1 stop5h 55m

Seattle/Tacoma Intl

Thu 8/13

3:51 pm-10:01 pm

1 stop5h 10m

$668

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/27

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 29, 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
9,680 reviews

Food

6.6

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,680 reviews
United Airlines
7.4
Good
9,680 reviews

Food

6.6

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

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 $367, United Airlines can have you in Seattle from Rock Springs in 5h 25m. 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
Lynnwood
Lacey
Edmonds
Leavenworth
Snoqualmie
Tumwater
Tukwila
Puyallup
Kent
Renton
Kirkland
Ellensburg
Fife
Lakewood
Issaquah
Shoreline

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.

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 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$238Average$328FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.