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

United Airlines and American Airlines are the most popular carriers 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 August 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.

$259 Cheap Flights from Rapid City to Seattle (RAP-SEA) in 2025

Q: What is the typical price of a round-trip flight between Rapid City and Seattle?

Prices are currently low for flights on this route. Typical prices usually range from $533 to $672. The lowest price recently found on this route was $259.

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Find the cheapest flights from Rapid City to Seattle (RAP-SEA)

Round-trip

One-way

Last minute

Cheap round-trip flights

5:59 pm - 10:59 pmRAP-SEA

6h 00m1 stop

3:36 pm - 9:59 pmSEA-RAP

5h 23m1 stop

$259United Airlines

Find Deal

mié., sep. 17 - mar., sep. 23

5:59 pm - 10:59 pmRAP-SEA

6h 00m1 stop

1:05 pm - 9:59 pmSEA-RAP

7h 54m2 stops

$264United Airlines

Find Deal

mié., sep. 17 - mar., sep. 23

10:40 am - 6:32 pmRAP-SEA

8h 52m2 stops

12:00 pm - 10:14 pmSEA-RAP

9h 14m1 stop

$279Delta

Find Deal

lun., ene. 12 - dom., ene. 18

12:43 pm - 10:15 pmRAP-SEA

10h 32m2 stops

3:36 pm - 9:59 pmSEA-RAP

5h 23m1 stop

$294United Airlines

Find Deal

sáb., ago. 30 - mié., sep. 3

12:43 pm - 10:15 pmRAP-SEA

10h 32m2 stops

6:25 am - 6:50 pmSEA-RAP

11h 25m2 stops

$299United Airlines

Find Deal

sáb., ago. 30 - mié., sep. 3

10:40 am - 4:19 pmRAP-SEA

6h 39m1 stop

12:00 pm - 10:14 pmSEA-RAP

9h 14m1 stop

$333Delta

Find Deal

lun., ene. 12 - dom., ene. 18

7:00 am - 6:49 pmRAP-SEA

12h 49m2 stops

3:36 pm - 9:59 pmSEA-RAP

5h 23m1 stop

$334United Airlines

Find Deal

sáb., sep. 6 - mar., sep. 9

5:39 am - 2:49 pmRAP-SEA

10h 10m1 stop

12:27 am - 11:34 amSEA-RAP

10h 07m1 stop

$455American Airlines

Find Deal

lun., ene. 12 - sáb., ene. 17

5:15 pm - 8:38 pmRAP-SEA

28h 23m1 stop

9:19 am - 4:28 pmSEA-RAP

6h 09m1 stop

$456Sun Country Air

Find Deal

vie., ago. 29 - lun., sep. 1

5:39 am - 12:45 pmRAP-SEA

8h 06m1 stop

12:46 am - 12:20 pmSEA-RAP

10h 34m1 stop

$705American Airlines

Find Deal

jue., ago. 28 - dom., ago. 31

United Airlines flights from Rapid City to Seattle

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

United Airlines

Sep 17

RAP5:59 pmRapid City

6h 00m

1 stop

SEA10:59 pmSeattle/Tacoma Intl

Sep 23

SEA3:36 pmSeattle/Tacoma Intl

5h 23m

1 stop

RAP9:59 pmRapid City

$259

Find similar

United Airlines

Sep 17

RAP5:59 pmRapid City

6h 00m

1 stop

SEA10:59 pmSeattle/Tacoma Intl

Sep 23

SEA1:05 pmSeattle/Tacoma Intl

7h 54m

2 stops

RAP9:59 pmRapid City

$264

Find similar

United Airlines

Aug 30

RAP12:43 pmRapid City

10h 32m

2 stops

SEA10:15 pmSeattle/Tacoma Intl

Sep 3

SEA3:36 pmSeattle/Tacoma Intl

5h 23m

1 stop

RAP9:59 pmRapid City

$294

Find similar

Delta flights from Rapid City to Seattle

Our best Delta deals on Rapid City to Seattle flight tickets

Delta

Jan 12

RAP10:40 amRapid City

8h 52m

2 stops

SEA6:32 pmSeattle/Tacoma Intl

Jan 18

SEA12:00 pmSeattle/Tacoma Intl

9h 14m

1 stop

RAP10:14 pmRapid City

$279

Find similar

Delta

Jan 12

RAP10:40 amRapid City

6h 39m

1 stop

SEA4:19 pmSeattle/Tacoma Intl

Jan 18

SEA12:00 pmSeattle/Tacoma Intl

9h 14m

1 stop

RAP10:14 pmRapid City

$333

Find similar

Delta

Sep 26

RAP4:24 pmRapid City

8h 19m

1 stop

SEA11:43 pmSeattle/Tacoma Intl

Oct 5

SEA6:00 amSeattle/Tacoma Intl

8h 43m

1 stop

RAP3:43 pmRapid City

$408

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

mié. 9/17

5:59 pm-10:59 pm

1 stop6h 00m

Seattle/Tacoma Intl

mar. 9/23

3:36 pm-9:59 pm

1 stop5h 23m

$259

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

mié. 9/17

5:59 pm-10:59 pm

1 stop6h 00m

Seattle/Tacoma Intl

mar. 9/23

1:05 pm-9:59 pm

2 stops7h 54m

$264

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

lun. 1/12

10:40 am-6:32 pm

2 stops8h 52m

Seattle/Tacoma Intl

dom. 1/18

12:00 pm-10:14 pm

1 stop9h 14m

$279

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

sáb. 8/30

12:43 pm-10:15 pm

2 stops10h 32m

Seattle/Tacoma Intl

mié. 9/3

3:36 pm-9:59 pm

1 stop5h 23m

$294

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

sáb. 8/30

12:43 pm-10:15 pm

2 stops10h 32m

Seattle/Tacoma Intl

mié. 9/3

6:25 am-6:50 pm

2 stops11h 25m

$299

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

lun. 1/12

10:40 am-4:19 pm

1 stop6h 39m

Seattle/Tacoma Intl

dom. 1/18

12:00 pm-10:14 pm

1 stop9h 14m

$333

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

sáb. 9/6

7:00 am-6:49 pm

2 stops12h 49m

Seattle/Tacoma Intl

mar. 9/9

3:36 pm-9:59 pm

1 stop5h 23m

$334

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

lun. 1/12

5:39 am-2:49 pm

1 stop10h 10m

Seattle/Tacoma Intl

sáb. 1/17

12:27 am-11:34 am

1 stop10h 07m

$455

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

vie. 8/29

5:15 pm-8:38 pm

1 stop28h 23m

Seattle/Tacoma Intl

lun. 9/1

9:19 am-4:28 pm

1 stop6h 09m

$456

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

jue. 8/28

5:39 am-12:45 pm

1 stop8h 06m

Seattle/Tacoma Intl

dom. 8/31

12:46 am-12:20 pm

1 stop10h 34m

$705

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 typical price of a round-trip flight between Rapid City and Seattle?

What is the cheapest month to fly to Seattle?

In general, March 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 $282. If you don’t want to visit Seattle in March, then you should wait until February to fly from Rapid City, when ticket prices are also cheap, with an average price of $328.

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

Best Price Found	$265
Fastest flight time	5h 27m
Direct flights	None
Airports in Seattle	1 airport

The best one-way flight to Seattle from Rapid City in the past 72 hours is $265. The best round-trip flight deal from Rapid City to Seattle found on momondo in the last 72 hours is $259.

The fastest flight from Rapid City to Seattle takes 5h 27m

There are no direct flights from Rapid City to Seattle. Popular non-direct route for this connection is Rapid City Airport - Seattle/Tacoma Intl Airport.

There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

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 27m.
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 August 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 82% of all bookings. The subsequent popular airline is Delta at 18%.

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
Delta	PriceFrom $258	Free Cancellation	Rating 8.0 7,985 reviews		Search Delta flights
United Airlines	PriceFrom $282	Free Cancellation	Rating 7.4 8,916 reviews		Search United Airlines flights

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Kent

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Federal Way

Puyallup

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Tukwila

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Lakewood

Centralia

Shoreline

Cle Elum

Fife

Westport

Redmond

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.