Cheap flights from Rock Springs to Seattle (RKS to SEA)

Popular airlines from Rock Springs, WY (RKS-Sweetwater County) to Seattle-Tacoma International Airport (SEA)

United
United

Cheap Flights from Rock Springs to Seattle (RKS-SEA)

Prices were available within the past 7 days and start at for one-way flights and $272 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

All deals

One way

Roundtrip

Wed, Nov 26 - Sun, Dec 7

RKS

Rock Springs

SEA

Seattle

$272

Roundtrip

found 2 days ago

Wed, Nov 26 - Sun, Dec 7

RKS

Rock Springs

SEA

Seattle

$305

Roundtrip

found 2 days ago

Sun, Nov 23 - Thu, Dec 4

RKS

Rock Springs

SEA

Seattle

$308

Roundtrip

found 2 days ago

Sun, Nov 16 - Wed, Dec 3

RKS

Rock Springs

SEA

Seattle

$313

Roundtrip

found 5 days ago

Thu, Nov 13 - Sun, Nov 16

RKS

Rock Springs

SEA

Seattle

$318

Roundtrip

found 5 days ago

Wed, Nov 26 - Sun, Dec 7

RKS

Rock Springs

SEA

Seattle

$332

Roundtrip

found 2 days ago

Wed, Nov 26 - Sun, Dec 7

RKS

Rock Springs

SEA

Seattle

$341

Roundtrip

found 2 days ago

Wed, Nov 5 - Wed, Nov 19

RKS

Rock Springs

SEA

Seattle

$343

Roundtrip

found 5 days ago

Wed, Nov 5 - Sun, Nov 16

RKS

Rock Springs

SEA

Seattle

$348

Roundtrip

found 5 days ago

Thu, Dec 25 - Fri, Dec 26

RKS

Rock Springs

SEA

Seattle

$358

Roundtrip

found 5 days ago

Thu, Nov 27 - Wed, Dec 3

RKS

Rock Springs

SEA

Seattle

$360

Roundtrip

found 4 hours ago

Sun, Nov 16 - Tue, Dec 2

RKS

Rock Springs

SEA

Seattle

$363

Roundtrip

found 5 days ago

Thu, Nov 27 - Wed, Dec 3

RKS

Rock Springs

SEA

Seattle

$364

Roundtrip

found 6 days ago

Sun, Nov 23 - Wed, Dec 3

RKS

Rock Springs

SEA

Seattle

$368

Roundtrip

found 2 days ago

Mon, Nov 24 - Wed, Dec 3

RKS

Rock Springs

SEA

Seattle

$374

Roundtrip

found 2 days ago

Wed, Nov 26 - Sun, Dec 7

RKS

Rock Springs

SEA

Seattle

$375

Roundtrip

found 2 days ago

Wed, Nov 26 - Sun, Dec 7

RKS

Rock Springs

SEA

Seattle

$375

Roundtrip

found 2 days ago

Wed, Nov 26 - Sun, Dec 7

RKS

Rock Springs

SEA

Seattle

$382

Roundtrip

found 2 days ago

Wed, Nov 26 - Sun, Dec 7

RKS

Rock Springs

SEA

Seattle

$384

Roundtrip

found 2 days ago

Wed, Jan 7 - Tue, Jan 20

RKS

Rock Springs

SEA

Seattle

$387

Roundtrip

found 5 days ago

Frequently asked questions

How much does a flight from Sweetwater County Airport (RKS) to Seattle - Tacoma Intl. Airport (SEA) cost?

Secure a cheap one-way flight or cheap return flight from $272 from Sweetwater County Airport (RKS) to Seattle - Tacoma Intl. Airport (SEA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.

What is the cheapest month to fly from Sweetwater County Airport (RKS) to Seattle - Tacoma Intl. Airport (SEA)?

November is the most affordable month to fly from RKS to SEA. Traveling outside of peak seasons is often the key to scoring lower fares.

What is the cheapest airline that flies from Sweetwater County Airport (RKS) to Seattle - Tacoma Intl. Airport (SEA)?

Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest RKS to SEA flight.

How many flights per day from Sweetwater County Airport (RKS) to Seattle - Tacoma Intl. Airport (SEA)?

Nonstop flights from Sweetwater County Airport (RKS) to Seattle - Tacoma Intl. Airport (SEA) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel details and click on either "1 Stop" or "2+ Stops."

What day of the week has the most flights from RKS to SEA?

Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can vary based on a number of factors, including the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.

What is the best time to fly from Sweetwater County Airport (RKS) to Seattle - Tacoma Intl. Airport (SEA)?

To touch down at Seattle - Tacoma Intl. Airport (SEA) on time, opt for a flight that takes off from Sweetwater County Airport (RKS) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.

Is it cheaper to buy a plane ticket from Sweetwater County Airport (RKS) to Seattle - Tacoma Intl. Airport (SEA) last-minute?

Booking your ticket from RKS to SEA right before your trip is usually more expensive. But if you're flexible with your itinerary, you could snag a cheap last-minute fare.

Is it cheaper to book a RKS to SEA flight and hotel package?

You'll typically save money by booking a RKS to SEA flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one convenient place. After selecting your ideal accommodations and flights, consider other add-ons like car rentals, tours and activities.

Can I cancel or change the date of my flight from Sweetwater County Airport (RKS) to Seattle - Tacoma Intl. Airport (SEA)?

Typically, you can cancel or reschedule your RKS to SEA flight. However, there may be additional charges, especially if you made your booking over 24 hours ago. Double-check your itinerary for the airline's fees and rules on flight changes, or if you'd like further information, head to our Customer Service portal.

Travel information

Origin airport	Sweetwater County
Destination airport	Seattle - Tacoma Intl.
Airlines serving	United
Roundtrip price	$271
Distance	765 mi

Book with confidence

Rock Springs to Seattle Flights

The cheapest times to fly from Rock Springs to Seattle

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Rock Springs to Seattle are during the month of November. You can find some of the cheapest flights from Rock Springs to Seattle with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Rock Springs to Seattle

Sunday is one of the best days to book for cheap flights from Rock Springs to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Rock Springs to Seattle

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Rock Springs to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Rock Springs to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Rock Springs to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.