What is the cheapest airline that flies from Rapid City to Seattle/Tacoma Intl?

United Airlines is the most popular carrier operating from Rapid City to Seattle/Tacoma Intl

When did momondo last update prices for flights from Rapid City Airport to Seattle/Tacoma Intl Airport?

Prices for flights from Rapid City Airport to Seattle/Tacoma Intl Airport are updated daily.

How many operators does momondo search for flights from Rapid City Airport to Seattle/Tacoma Intl Airport?

The number of operators available for flights from Rapid City Airport to Seattle/Tacoma Intl Airport is 2 as of December 2025.

How old do you have to be to fly from Rapid City Airport to Seattle/Tacoma Intl Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Rapid City Airport to Seattle/Tacoma Intl Airport.

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$241 Cheap Flights from Rapid City to Seattle in 2025/26

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Find the cheapest flights from Rapid City to Seattle

Round-trip

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Cheap round-trip flights

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6:05 pm - 11:12 pm

RAP

SEA

6h 07m1 stop

5:00 am - 11:25 am

SEA

RAP

5h 25m1 stop

$279United Airlines

Mon, Jan 5 - Thu, Jan 29

6:05 pm - 11:12 pm

RAP

SEA

6h 07m1 stop

9:00 am - 10:29 pm

SEA

RAP

12h 29m2 stops

$284United Airlines

Mon, Jan 5 - Thu, Jan 29

10:10 pm - 4:29 pm

RAP

SEA

19h 19m2 stops

10:51 am - 9:20 pm

SEA

RAP

9h 29m1 stop

$303Multiple Airlines

Sun, Jan 11 - Sun, Jan 18

12:00 pm - 6:04 pm

RAP

SEA

7h 04m1 stop

5:00 am - 1:13 pm

SEA

RAP

7h 13m1 stop

$310United Airlines

Tue, Mar 17 - Sat, Mar 21

7:00 am - 4:14 pm

RAP

SEA

10h 14m2 stops

5:00 am - 1:13 pm

SEA

RAP

7h 13m1 stop

$315United Airlines

Tue, Mar 17 - Sat, Mar 21

10:45 am - 6:26 pm

RAP

SEA

8h 41m1 stop

12:25 pm - 8:32 pm

SEA

RAP

7h 07m1 stop

$349United Airlines

Wed, Jan 14 - Sat, Jan 17

6:05 pm - 11:12 pm

RAP

SEA

6h 07m1 stop

5:00 am - 1:12 pm

SEA

RAP

7h 12m1 stop

$350United Airlines

Mon, Jan 5 - Sun, Jan 11

12:35 pm - 6:26 pm

RAP

SEA

6h 51m1 stop

9:00 am - 8:32 pm

SEA

RAP

10h 32m2 stops

$354United Airlines

Wed, Jan 14 - Sat, Jan 17

7:00 am - 4:29 pm

RAP

SEA

10h 29m2 stops

9:00 am - 10:29 pm

SEA

RAP

12h 29m2 stops

$359United Airlines

Wed, Jan 14 - Sat, Jan 17

7:00 am - 9:12 pm

RAP

SEA

15h 12m3 stops

9:00 am - 8:32 pm

SEA

RAP

10h 32m2 stops

$364United Airlines

Fri, Jan 23 - Mon, Jan 26

United Airlines flights from Rapid City to Seattle

Our best United Airlines deals on Rapid City to Seattle flight tickets

United Airlines

Jan 5

RAP6:05 pmRapid City

6h 07m

1 stop

SEA11:12 pmSeattle/Tacoma Intl

Jan 29

SEA5:00 amSeattle/Tacoma Intl

5h 25m

1 stop

RAP11:25 amRapid City

$279

Find similar

United Airlines

Jan 5

RAP6:05 pmRapid City

6h 07m

1 stop

SEA11:12 pmSeattle/Tacoma Intl

Jan 29

SEA9:00 amSeattle/Tacoma Intl

12h 29m

2 stops

RAP10:29 pmRapid City

$284

Find similar

United Airlines

Mar 17

RAP12:00 pmRapid City

7h 04m

1 stop

SEA6:04 pmSeattle/Tacoma Intl

Mar 21

SEA5:00 amSeattle/Tacoma Intl

7h 13m

1 stop

RAP1:13 pmRapid City

$310

Find similar

Delta flights from Rapid City to Seattle

Our best Delta deals on Rapid City to Seattle flight tickets

Delta

Mar 16

RAP4:00 pmRapid City

8h 53m

1 stop

SEA11:53 pmSeattle/Tacoma Intl

Mar 21

SEA6:00 amSeattle/Tacoma Intl

8h 19m

1 stop

RAP3:19 pmRapid City

$399

Find similar

Delta

Mar 16

RAP4:00 pmRapid City

9h 03m

2 stops

SEA12:03 amSeattle/Tacoma Intl

Mar 21

SEA6:00 amSeattle/Tacoma Intl

8h 19m

1 stop

RAP3:19 pmRapid City

$454

Find similar

Delta

Mar 15

RAP4:00 pmRapid City

9h 03m

2 stops

SEA12:03 amSeattle/Tacoma Intl

Mar 20

SEA1:30 pmSeattle/Tacoma Intl

7h 56m

2 stops

RAP10:26 pmRapid City

$1,089

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Mon 1/5

6:05 pm-11:12 pm

1 stop6h 07m

Seattle/Tacoma Intl

Thu 1/29

5:00 am-11:25 am

1 stop5h 25m

$279

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Mon 1/5

6:05 pm-11:12 pm

1 stop6h 07m

Seattle/Tacoma Intl

Thu 1/29

9:00 am-10:29 pm

2 stops12h 29m

$284

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Sun 1/11

10:10 pm-4:29 pm

2 stops19h 19m

Seattle/Tacoma Intl

Sun 1/18

10:51 am-9:20 pm

1 stop9h 29m

$303

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Tue 3/17

12:00 pm-6:04 pm

1 stop7h 04m

Seattle/Tacoma Intl

Sat 3/21

5:00 am-1:13 pm

1 stop7h 13m

$310

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Tue 3/17

7:00 am-4:14 pm

2 stops10h 14m

Seattle/Tacoma Intl

Sat 3/21

5:00 am-1:13 pm

1 stop7h 13m

$315

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Wed 1/14

10:45 am-6:26 pm

1 stop8h 41m

Seattle/Tacoma Intl

Sat 1/17

12:25 pm-8:32 pm

1 stop7h 07m

$349

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Mon 1/5

6:05 pm-11:12 pm

1 stop6h 07m

Seattle/Tacoma Intl

Sun 1/11

5:00 am-1:12 pm

1 stop7h 12m

$350

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Wed 1/14

12:35 pm-6:26 pm

1 stop6h 51m

Seattle/Tacoma Intl

Sat 1/17

9:00 am-8:32 pm

2 stops10h 32m

$354

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Wed 1/14

7:00 am-4:29 pm

2 stops10h 29m

Seattle/Tacoma Intl

Sat 1/17

9:00 am-10:29 pm

2 stops12h 29m

$359

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Fri 1/23

7:00 am-9:12 pm

3 stops15h 12m

Seattle/Tacoma Intl

Mon 1/26

9:00 am-8:32 pm

2 stops10h 32m

$364

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Rapid City to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Seattle?

In general, October is the cheapest month to fly from Rapid City to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $321. If you don’t want to visit Seattle in October, then you should wait until March to fly from Rapid City, when ticket prices are also cheap, with an average price of $325.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Rapid City is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $589. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Rapid City because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $700.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Rapid City at noon is the least expensive time of day to depart. momondo users have found prices as low as $582 when looking at flights departing at noon. Flights to Seattle are more costly in the morning, with an average ticket price of $632. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

When to book flights from Rapid City to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Rapid City to Seattle according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Rapid City to Seattle (RAP to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Rapid City to Seattle

Fastest flight time	5h 29m
Direct flights	None

The fastest flight from Rapid City to Seattle takes 5h 29m

There are no direct flights from Rapid City to Seattle. There are no popular flight routes from Rapid City to Seattle.

Search flight deals

How far is Rapid City to Seattle/Tacoma Intl by plane?
The straight-line distance from Rapid City to Seattle/Tacoma Intl is 948.2 mi. By plane, this route typically takes 5h 29m.
When did momondo last update prices for flights from Rapid City Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Rapid City Airport to Seattle/Tacoma Intl Airport are updated daily.
How many operators does momondo search for flights from Rapid City Airport to Seattle/Tacoma Intl Airport?
The number of operators available for flights from Rapid City Airport to Seattle/Tacoma Intl Airport is 2 as of December 2025.
How old do you have to be to fly from Rapid City Airport to Seattle/Tacoma Intl Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Rapid City Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Rapid City to Seattle?
momondo data reveals that the most frequently booked airline on the route from Rapid City to Seattle is United Airlines, representing 86% of all bookings. The subsequent popular airline is Delta at 14%.

Best airlines flying from Rapid City to Seattle

Compare and see reviews for airlines that fly from Rapid City to Seattle with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $258	Free Cancellation	Rating 7.4 9,092 reviews		Search United Airlines flights
Delta	PriceFrom $258	Free Cancellation	Rating 7.9 8,008 reviews		Search Delta flights

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Marysville

Puyallup

Redmond

Tukwila

Cle Elum

Federal Way

Lakewood

Fife

Centralia

Westport

Kirkland

Shoreline

Why use momondo?

Why should I use momondo to find a flight deal from Rapid City to Seattle?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Rapid City to Seattle. momondo saves you time and could save you money on your trip.

Can I find flights from Rapid City to Seattle with flexible booking policies on momondo?

momondo does allow users to show only those flights to Seattle from Rapid City which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Rapid City to Seattle?

Once you have performed a search for Rapid City to Seattle flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Rapid City to Seattle right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Rapid City to Seattle now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Seattle and let you know when they change.