The cheapest times to fly from RKS to SEA are

  • January 1st to March 11th
  • April 23rd to May 6th
  • August 13th to November 18th (except the week of August 27th)
  • early December

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from RKS to SEA is late January. Prices can be as high as $558 for Saturday flights during mid to late November, or as low as $314 for Tuesday flights around late January.


When to Fly to Seattle

Flying from Rock Springs, WY (RKS) to Seattle, WA (SEA) will usually cost between $324 to $484 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late January with an average ticket price of $333. Due to high demand the most expensive time to fly is mid to late November, with an average price of $442. Planning your trip to low-cost times can easily save you $109 on economy flights and even more on first-class flights. Generally, any price below $362 can be considered a good price for a round-trip RKS to SEA flight.

See below for a graph of average weekly prices for the RKS to SEA route. All prices are for round-trip tickets in USD.

RKS to SEA Flight Prices

Compared to other flights, the RKS to SEA flight is much cheaper than the average and costs much less than the average flight leaving from Rock Springs. The average price per mile (for a direct flight) is $0.29, which is below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Saturdays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $73 (17%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $336. Return trip prices are from the SEA to RKS flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from RKS to SEA can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 2 hour 22 minutes may not be realistic.


Flight Questions Answered

Still have questions about flying from RKS to SEA? We’ve got answers.

Which airlines fly this route?

You can find 3 major airlines flying this route most often: Alaska, Delta, United, and potentially more during busy seasons.

How far away is it from Seattle/Tacoma International Airport to Rock Springs Sweetwater County Airport?

The distance between the two airports is roughly 766 miles or 1233 kilometers.

How long does it take to fly from RKS to SEA?

The real-world flight time for a nonstop RKS to SEA flight is about 2 hour 22 minutes.

How many flights go between Rock Springs, WY and Seattle, WA?

It depends on the day of the week and the date, but a typical day might have around 20 available flights from RKS to SEA.


Airport Location Info


Departing Airport

Origination codeRKS
Origination airport nameRock Springs Sweetwater County Airport
CityRock Springs, WY
Countrythe United States

Return Airport

Destination codeSEA
Destination airport nameSeattle/Tacoma International Airport
CitySeattle, WA
Countrythe United States


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.