What is the cheapest month to book a flight from Rock Springs to Seattle?

Currently, January is the cheapest month in which you can book a flight from Rock Springs to Seattle (average of $238). Flying from Rock Springs to Seattle in June is currently the most expensive (average of $389). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

What is the cheapest time of day to fly from RKS to SEA?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Rock Springs to Seattle as you normally would.

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.

$267+ Flights from Rock Springs to Seattle

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Cheap flight deals from Rock Springs to Seattle

Round-trip from	$308 (United Airlines)
One-way from	$267 (United Airlines)

From Rock Springs Sweetwater County to Seattle/Tacoma Intl

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One-way flight from Rock Springs Sweetwater County to Seattle/Tacoma Intl

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Find 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 July 29, 2025.

Fri 10/35:15 amRKS - SEA

1 stop5h 44mUnited Airlines

Mon 10/65:00 amSEA - RKS

1 stop7h 23mUnited Airlines

Deal found 7/29

$308

Best flights from Rock Springs to Seattle
Discover carefully curated flight deals from Rock Springs to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2025.

Fri 10/35:15 amRKS - SEA

1 stop5h 44mUnited Airlines

Mon 10/65:00 amSEA - RKS

1 stop7h 23mUnited Airlines

Deal found 7/29

$308

Last-minute flights from Rock Springs to Seattle
Discover last-minute flight deals from Rock Springs to Seattle. Data last updated July 29, 2025 and is based on user searches.

Wed 8/135:33 amRKS - SEA

2 stops8h 52mUnited Airlines

Sun 8/175:00 amSEA - RKS

1 stop7h 05mUnited Airlines

Deal found 7/29

$412

One-way flights from Rock Springs to Seattle
Search for one-way flight options from Rock Springs to Seattle. Find affordable one-way fares based on user searches. Data last updated July 29, 2025.

Thu 9/111:58 pmRKS - SEA

1 stop4h 53mUnited Airlines

Deal found 7/28

$267

Cheapflights Fare Finder

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

Rock SpringsSeattle

RKS - SEA

RKSSEA

Rock Springs Sweetwater County

Fri 10/3

5:15 am-9:59 am

1 stop5h 44m

Seattle/Tacoma Intl

Mon 10/6

5:00 am-1:23 pm

1 stop7h 23m

$308

Rock SpringsSeattle

RKS - SEA

RKSSEA

Rock Springs Sweetwater County

Thu 9/11

1:58 pm-5:51 pm

1 stop4h 53m

$267

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

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

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

8,896 reviews

Reviews

1 / 20

2.0

Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

United Airlines

7.4

Good

8,896 reviews

United Airlines

7.4

Good

8,896 reviews

Reviews

1 / 20

2.0

Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

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.
What is the cheapest month to book a flight from Rock Springs to Seattle?
Currently, January is the cheapest month in which you can book a flight from Rock Springs to Seattle (average of $238). Flying from Rock Springs to Seattle in June is currently the most expensive (average of $389). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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$267+ 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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Rock Springs to Seattle with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Rock Springs to Seattle

Round-trip from

One-way from

Find flight deals from Rock Springs to Seattle

Cheapest flights from Rock Springs to SeattleExplore 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 July 29, 2025.

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 July 29, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Rock Springs to Seattle that are best for you.

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.

Reviews of airlines servicing Seattle

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.

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.

Can I find deals for flights from Rock Springs to Seattle that include hotel bookings?

How can I find direct flights from Rock Springs to Seattle?

Can I find deals for business class flights from Rock Springs to Seattle?

What is the cheapest month to book a flight from Rock Springs to Seattle?

Traveling to a place near Seattle?

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.

Alternative routes for Rock Springs to Seattle

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Travel Smart

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 July 29, 2025.