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Cheap flights from Seattle to Rapid City from $139

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Rapid City departing on 4/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Seattle to Rapid City

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
5:00 am - 11:24 am
SEA
-
RAP
5h 24m
1 stop
United Airlines Logo
2:42 pm - 9:06 pm
RAP
-
SEA
7h 24m
1 stop
$279United Airlines
Sat, Apr 18 - Wed, Apr 22
United Airlines Logo
5:00 am - 11:24 am
SEA
-
RAP
5h 24m
1 stop
United Airlines Logo
12:00 pm - 9:46 pm
RAP
-
SEA
10h 46m
2 stops
$284United Airlines
Sat, Apr 18 - Wed, Apr 22
United Airlines Logo
5:00 am - 1:08 pm
SEA
-
RAP
7h 08m
1 stop
United Airlines Logo
5:35 pm - 10:59 pm
RAP
-
SEA
6h 24m
1 stop
$291United Airlines
Mon, Apr 27 - Mon, May 4
United Airlines Logo
5:00 am - 11:24 am
SEA
-
RAP
5h 24m
1 stop
United Airlines Logo
2:42 pm - 9:06 pm
RAP
-
SEA
7h 24m
1 stop
$296United Airlines
Fri, Apr 17 - Fri, Apr 24
United Airlines Logo
5:00 am - 1:13 pm
SEA
-
RAP
7h 13m
1 stop
United Airlines Logo
5:00 am - 9:46 am
RAP
-
SEA
5h 46m
1 stop
$300United Airlines
Thu, Mar 26 - Thu, Apr 2
United Airlines Logo
12:22 pm - 10:27 pm
SEA
-
RAP
9h 05m
2 stops
United Airlines Logo
2:42 pm - 9:06 pm
RAP
-
SEA
7h 24m
1 stop
$301United Airlines
Fri, Apr 17 - Fri, Apr 24
Multiple Airlines Logo
10:08 pm - 10:47 am
SEA
-
RAP
11h 39m
1 stop
Multiple Airlines Logo
5:52 pm - 5:34 pm
RAP
-
SEA
24h 42m
1 stop
$312Multiple Airlines
Thu, Mar 26 - Thu, Apr 2
United Airlines Logo
3:48 pm - 10:27 pm
SEA
-
RAP
5h 39m
1 stop
United Airlines Logo
4:15 pm - 9:06 pm
RAP
-
SEA
5h 51m
1 stop
$321United Airlines
Tue, Apr 21 - Sat, Apr 25
United Airlines Logo
5:00 am - 1:13 pm
SEA
-
RAP
7h 13m
1 stop
United Airlines Logo
12:00 pm - 6:00 pm
RAP
-
SEA
7h 00m
1 stop
$323United Airlines
Sat, Mar 28 - Wed, Apr 1
United Airlines Logo
5:00 am - 1:08 pm
SEA
-
RAP
7h 08m
1 stop
United Airlines Logo
2:35 pm - 9:06 pm
RAP
-
SEA
7h 31m
1 stop
$324United Airlines
Sun, Apr 26 - Sat, May 2

Delta flights from Seattle to Rapid City

Our best Delta deals on Seattle to Rapid City flight tickets
Delta
Mar 26
SEA8:25 amSeattle/Tacoma Intl
5h 53m
1 stop
RAP3:18 pmRapid City
Apr 2
RAP4:01 pmRapid City
8h 39m
1 stop
SEA11:40 pmSeattle/Tacoma Intl
$345
Delta
Mar 26
SEA8:25 amSeattle/Tacoma Intl
5h 53m
1 stop
RAP3:18 pmRapid City
Apr 2
RAP4:01 pmRapid City
9h 02m
2 stops
SEA12:03 amSeattle/Tacoma Intl
$350
Delta
Apr 1
SEA6:00 amSeattle/Tacoma Intl
8h 18m
1 stop
RAP3:18 pmRapid City
Apr 8
RAP4:01 pmRapid City
9h 02m
2 stops
SEA12:03 amSeattle/Tacoma Intl
$354

United Airlines flights from Seattle to Rapid City

Our best United Airlines deals on Seattle to Rapid City flight tickets
United Airlines
Apr 18
SEA5:00 amSeattle/Tacoma Intl
5h 24m
1 stop
RAP11:24 amRapid City
Apr 22
RAP2:42 pmRapid City
7h 24m
1 stop
SEA9:06 pmSeattle/Tacoma Intl
$279
United Airlines
Apr 18
SEA5:00 amSeattle/Tacoma Intl
5h 24m
1 stop
RAP11:24 amRapid City
Apr 22
RAP12:00 pmRapid City
10h 46m
2 stops
SEA9:46 pmSeattle/Tacoma Intl
$284
United Airlines
Apr 27
SEA5:00 amSeattle/Tacoma Intl
7h 08m
1 stop
RAP1:08 pmRapid City
May 4
RAP5:35 pmRapid City
6h 24m
1 stop
SEA10:59 pmSeattle/Tacoma Intl
$291

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Rapid City that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated February 27, 2026.
Use the filters below to find and compare flights from Seattle to Rapid City that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleRapid City

SEA - RAP

SEARAP

Seattle/Tacoma Intl

Sat 4/18

5:00 am-11:24 am

1 stop5h 24m

Rapid City

Wed 4/22

2:42 pm-9:06 pm

1 stop7h 24m

$279

SeattleRapid City

SEA - RAP

SEARAP

Seattle/Tacoma Intl

Sat 4/18

5:00 am-11:24 am

1 stop5h 24m

Rapid City

Wed 4/22

12:00 pm-9:46 pm

2 stops10h 46m

$284

SeattleRapid City

SEA - RAP

SEARAP

Seattle/Tacoma Intl

Mon 4/27

5:00 am-1:08 pm

1 stop7h 08m

Rapid City

Mon 5/4

5:35 pm-10:59 pm

1 stop6h 24m

$291

SeattleRapid City

SEA - RAP

SEARAP

Seattle/Tacoma Intl

Fri 4/17

5:00 am-11:24 am

1 stop5h 24m

Rapid City

Fri 4/24

2:42 pm-9:06 pm

1 stop7h 24m

$296

SeattleRapid City

SEA - RAP

SEARAP

Seattle/Tacoma Intl

Thu 3/26

5:00 am-1:13 pm

1 stop7h 13m

Rapid City

Thu 4/2

5:00 am-9:46 am

1 stop5h 46m

$300

SeattleRapid City

SEA - RAP

SEARAP

Seattle/Tacoma Intl

Fri 4/17

12:22 pm-10:27 pm

2 stops9h 05m

Rapid City

Fri 4/24

2:42 pm-9:06 pm

1 stop7h 24m

$301

SeattleRapid City

SEA - RAP

SEARAP

Seattle/Tacoma Intl

Thu 3/26

10:08 pm-10:47 am

1 stop11h 39m

Rapid City

Thu 4/2

5:52 pm-5:34 pm

1 stop24h 42m

$312

SeattleRapid City

SEA - RAP

SEARAP

Seattle/Tacoma Intl

Tue 4/21

3:48 pm-10:27 pm

1 stop5h 39m

Rapid City

Sat 4/25

4:15 pm-9:06 pm

1 stop5h 51m

$321

SeattleRapid City

SEA - RAP

SEARAP

Seattle/Tacoma Intl

Sat 3/28

5:00 am-1:13 pm

1 stop7h 13m

Rapid City

Wed 4/1

12:00 pm-6:00 pm

1 stop7h 00m

$323

SeattleRapid City

SEA - RAP

SEARAP

Seattle/Tacoma Intl

Sun 4/26

5:00 am-1:08 pm

1 stop7h 08m

Rapid City

Sat 5/2

2:35 pm-9:06 pm

1 stop7h 31m

$324

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Rapid City from

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

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

What is the cheapest month to fly to Rapid City?

The month of January is, on average, the cheapest month to fly to Rapid City from Seattle, with most prices found around $349. If you aren’t able to travel to Rapid City during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $353.

How far in advance should I book a flight to Rapid City?

You are more likely to see cheaper flights to Rapid City from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Rapid City for around $472 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Rapid City from Seattle for as low as $318 on momondo.

How have Seattle to Rapid City flight prices changed over time?

As of February 2026, prices for Seattle to Rapid City flights are approximately 101% more expensive when compared to flights at the same time last year.

When to book flights from Seattle to Rapid City

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

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

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

Fastest flight time

4h 59m

Direct flights

None
The fastest flight from Seattle to Rapid City takes 4h 59m
There are no direct flights from Seattle to Rapid City. There are no popular flight routes from Seattle to Rapid City.
Search flight deals

  • How far is Seattle/Tacoma Intl to Rapid City by plane?

    The distance between Seattle/Tacoma Intl and Rapid City is about 948.2 mi. Typically, this will take 4h 59m by plane in normal conditions.

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

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

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

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

  • What documentation or ID do you need to fly to Rapid City Airport?

    The required travel and health documents for your Rapid City Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Rapid City Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Seattle to Rapid City?

Best airlines flying from Seattle to Rapid City

Compare and see reviews for airlines that fly from Seattle to Rapid City with momondo
Airline
Rating
Free Cancellation
Price
Sun Country AirPriceFrom $137Free CancellationRating
6.8
340 reviews
Search Sun Country Air flights
DeltaPriceFrom $190Free CancellationRating
7.9
8,238 reviews
Search Delta flights
United AirlinesPriceFrom $312Free CancellationRating
7.4
9,349 reviews
Search United Airlines flights

Traveling to a place near Rapid City?

Book flights to Rapid City if you plan to visit one of these locations
Deadwood
Keystone
Sturgis
Spearfish
Custer
Hill City
Wall
Hot Springs

Why use momondo?

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

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

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

Yes. momondo allows you to filter the results for Seattle to Rapid City flights to just show those with flexible booking policies.

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

Once all potential Seattle to Rapid City flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Seattle to Rapid City flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Rapid City trip

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