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$358+ Cheap flights from Rock Springs to Seattle (RKS - 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 6/24. Fares are subject to change and may not be available on all flights or dates of travel.
RKS — SEA
Jul 15 — Jul 221
Wed 7/15
Wed 7/22
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 June 15, 2026.

This United Airlines deal was found by Cheapflights users on 6/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/92:16 pm
RKS
-
SEA
1 stop7h 54m
United Airlines
Sun 7/125:00 am
SEA
-
RKS
1 stop7h 31m
United Airlines
Deal found 6/14$377
This United Airlines deal was found by Cheapflights users on 6/11. 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 10/282:05 pm
RKS
-
SEA
1 stop9h 54m
United Airlines
Sat 10/313:51 pm
SEA
-
RKS
1 stop5h 10m
United Airlines
Deal found 6/11$378
This United Airlines deal was found by Cheapflights users on 6/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/225:05 am
RKS
-
SEA
1 stop7h 39m
United Airlines
Sat 9/267:11 am
SEA
-
RKS
2 stops13h 50m
United Airlines
Deal found 6/13$384
This United Airlines deal was found by Cheapflights users on 6/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/102:16 pm
RKS
-
SEA
1 stop9h 54m
United Airlines
Sun 7/125:00 am
SEA
-
RKS
1 stop7h 31m
United Airlines
Deal found 6/14$393
This United Airlines deal was found by Cheapflights users on 6/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/102:16 pm
RKS
-
SEA
2 stops12h 13m
United Airlines
Sat 7/118:45 am
SEA
-
RKS
2 stops12h 38m
United Airlines
Deal found 6/14$404
This United Airlines deal was found by Cheapflights users on 6/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/92:16 pm
RKS
-
SEA
1 stop9h 54m
United Airlines
Sat 7/118:45 am
SEA
-
RKS
2 stops12h 38m
United Airlines
Deal found 6/14$414
This United Airlines deal was found by Cheapflights users on 6/12. 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 12/105:25 am
RKS
-
SEA
2 stops9h 53m
United Airlines
Mon 12/145:07 am
SEA
-
RKS
1 stop7h 23m
United Airlines
Deal found 6/12$442
This United Airlines deal was found by Cheapflights users on 6/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/32:22 pm
RKS
-
SEA
1 stop9h 42m
United Airlines
Sun 9/66:30 am
SEA
-
RKS
2 stops14h 51m
United Airlines
Deal found 6/14$459
This United Airlines deal was found by Cheapflights users on 6/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/42:22 pm
RKS
-
SEA
1 stop7h 53m
United Airlines
Wed 9/91:16 pm
SEA
-
RKS
2 stops8h 05m
United Airlines
Deal found 6/15$473
This United Airlines deal was found by Cheapflights users on 6/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/35:05 am
RKS
-
SEA
1 stop5h 55m
United Airlines
Thu 8/132:34 pm
SEA
-
RKS
1 stop6h 47m
United Airlines
Deal found 6/13$492

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 June 15, 2026.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$377
(United Airlines)

One-way from

$358
(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
One-way flight from Rock Springs Sweetwater County to Seattle/Tacoma Intl
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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 June 15, 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

Thu 12/10

5:25 am-9:59 am

1 stop5h 34m

Seattle/Tacoma Intl

Mon 12/14

5:07 am-1:30 pm

1 stop7h 23m

$377

Rock SpringsSeattle

RKS - SEA

RKSSEA

Rock Springs Sweetwater County

Wed 10/28

2:05 pm-10:59 pm

1 stop9h 54m

Seattle/Tacoma Intl

Sat 10/31

3:51 pm-10:01 pm

1 stop5h 10m

$378

Rock SpringsSeattle

RKS - SEA

RKSSEA

Rock Springs Sweetwater County

Tue 9/22

5:05 am-11:44 am

1 stop7h 39m

Seattle/Tacoma Intl

Sat 9/26

7:11 am-10:01 pm

2 stops13h 50m

$384

Rock SpringsSeattle

RKS - SEA

RKSSEA

Rock Springs Sweetwater County

Thu 9/3

2:22 pm-11:04 pm

1 stop9h 42m

Seattle/Tacoma Intl

Sun 9/6

5:00 am-1:47 pm

1 stop7h 47m

$393
Cheapest one-way
Quickest one-way

Rock SpringsSeattle

RKS - SEA

RKSSEA

Rock Springs Sweetwater County

Mon 6/22

5:05 am-10:00 am

1 stop5h 55m

$413

Rock SpringsSeattle

RKS - SEA

RKSSEA

Rock Springs Sweetwater County

Fri 6/19

2:16 pm-9:10 pm

1 stop7h 54m

$413

Rock SpringsSeattle

RKS - SEA

RKSSEA

Rock Springs Sweetwater County

Sun 6/21

5:05 am-10:00 am

1 stop5h 55m

$413

Rock SpringsSeattle

RKS - SEA

RKSSEA

Rock Springs Sweetwater County

Tue 6/23

2:16 pm-1:13 am

2 stops11h 57m

$419

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

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 June 15, 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
9,830 reviews

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
United Airlines
7.4
Good
9,830 reviews
United Airlines
7.4
Good
9,830 reviews

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

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 $377, United Airlines can have you in Seattle from Rock Springs in 5h 34m. 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
Lacey
Ocean Shores
Leavenworth
Olympia
Edmonds
Snoqualmie
Tumwater
Tukwila
Puyallup
Kent
Lynnwood
Renton
Ellensburg
Fife
Lakewood
Issaquah
Marysville
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 June 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$238Average$403FlexibilityNo cancel feeOn-time69%

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