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$120+ Cheap flights from Rapid City to Seattle (RAP - 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 8/16. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — SEA
Aug 26 — Sep 21
Wed 8/26
Wed 9/2
1 adult, Economy
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Cheap flight deals from Rapid City to Seattle

Cheapest flights from Rapid City to Seattle
Explore the most affordable flight options available from Rapid City to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 27, 2026.

This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/34:00 pm
RAP
-
SEA
1 stop8h 59m
Delta
Wed 1/66:05 am
SEA
-
RAP
1 stop8h 41m
Delta
Deal found 7/22$329
This United Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/95:00 am
RAP
-
SEA
1 stop5h 47m
United Airlines
Sat 11/1410:40 am
SEA
-
RAP
2 stops9h 03m
United Airlines
Deal found 7/24$334
This Delta deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/274:30 pm
RAP
-
SEA
1 stop8h 24m
Delta
Tue 9/111:59 pm
SEA
-
RAP
1 stop9h 03m
Delta
Deal found 7/23$354
This United Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/203:27 pm
RAP
-
SEA
1 stop6h 48m
United Airlines
Mon 8/245:00 am
SEA
-
RAP
1 stop6h 24m
United Airlines
Deal found 7/25$357
This United Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/117:00 am
RAP
-
SEA
2 stops9h 39m
United Airlines
Sat 8/295:00 am
SEA
-
RAP
1 stop6h 24m
United Airlines
Deal found 7/25$359
This American Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/275:06 pm
RAP
-
SEA
1 stop8h 44m
American Airlines
Tue 9/110:15 am
SEA
-
RAP
1 stop10h 20m
American Airlines
Deal found 7/24$360
This United Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2510:26 am
RAP
-
SEA
1 stop6h 37m
United Airlines
Sat 10/35:00 am
SEA
-
RAP
1 stop5h 55m
United Airlines
Deal found 7/24$371
This United Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/87:00 am
RAP
-
SEA
2 stops9h 39m
United Airlines
Tue 9/155:00 am
SEA
-
RAP
1 stop5h 55m
United Airlines
Deal found 7/26$402
This United Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/205:58 pm
RAP
-
SEA
1 stop6h 06m
United Airlines
Fri 8/285:00 am
SEA
-
RAP
1 stop5h 55m
United Airlines
Deal found 7/27$409

Find flight deals from Rapid City to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Rapid City (RAP) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$329
(Delta)

One-way from

$120
(Kiwi.com)

Popular in

January

Cheapest in

February

Average price

$617
Provider with most accurate pricing for Rapid City-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Rapid City-Seattle/Tacoma Intl flights.
Search Deals
From Rapid City to Seattle/Tacoma Intl
Search Deals
One-way flight from Rapid City to Seattle/Tacoma Intl
Search Deals
High demand for flights, 2% potential price rise
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Rapid City to Seattle 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, Cheapflights users made 2,558,603 searches. Data last updated July 27, 2026.
Use the filters below to find and compare flights from Rapid City to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Thu 8/27

4:30 pm-11:54 pm

1 stop8h 24m

Seattle/Tacoma Intl

Tue 9/1

11:59 pm-10:02 am

1 stop9h 03m

$354

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Thu 8/20

5:58 pm-11:04 pm

1 stop6h 06m

Seattle/Tacoma Intl

Fri 8/28

5:00 am-11:55 am

1 stop5h 55m

$409

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Fri 10/23

11:17 am-4:03 pm

1 stop5h 46m

Seattle/Tacoma Intl

Mon 10/26

12:20 pm-10:30 pm

2 stops9h 10m

$424

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Tue 9/8

4:31 pm-11:55 pm

1 stop8h 24m

Seattle/Tacoma Intl

Tue 9/15

2:30 pm-10:18 pm

1 stop6h 48m

$449
Quickest round-trip

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Mon 8/31

8:55 am-1:22 pm

1 stop5h 27m

Seattle/Tacoma Intl

Wed 9/9

5:00 am-12:24 pm

1 stop6h 24m

$464

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Mon 8/24

10:26 am-9:51 pm

2 stops12h 25m

Seattle/Tacoma Intl

Mon 8/31

6:30 am-5:58 pm

2 stops10h 28m

$480

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Sat 8/8

3:31 pm-11:19 pm

2 stops8h 48m

Seattle/Tacoma Intl

Wed 8/12

3:54 pm-10:28 pm

1 stop5h 34m

$484

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Thu 12/3

8:35 am-12:33 am

2 stops16h 58m

Seattle/Tacoma Intl

Wed 1/6

5:07 am-11:13 am

1 stop5h 06m

$522
Cheapest one-way

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Sun 8/16

10:06 pm-11:04 am

1 stop13h 58m

$120

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Wed 9/9

4:31 pm-11:55 pm

1 stop8h 24m

$238

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/24

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

Compare providers for flights from Rapid City to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Rapid City to Seattle in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Rapid City-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Rapid City-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Rapid City-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Rapid City-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Rapid City-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Rapid City to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Rapid City 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.

Cheapflights Insights

Everything you need to know about your flight from Rapid City to Seattle

What is the cheapest month to book a flight from Rapid City to Seattle?

Currently, February is the cheapest month in which you can book a flight from Rapid City to Seattle (average of $298). Flying from Rapid City to Seattle in January is currently the most expensive (average of $648). 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.

How much does it cost to fly round-trip from Rapid City to Seattle?

Airfare is below average for this route at the moment.

Rapid City to Seattle flights typically cost between $479 and $639 in December.
The cheapest round-trip price found within the last 5 days was $329 on Delta (Dec 3-Jan 6).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated July 27, 2026.
See what other customers who have flown with United Airlines from Rapid City to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,041 reviews

Comfort

7.3

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
6.0
Good

ROHIT,Jun 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this
United Airlines
7.4
Good
10,041 reviews
United Airlines
7.4
Good
10,041 reviews

Comfort

7.3

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
6.0
Good

ROHIT,Jun 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this

Related info for your journey

Find useful and relevant information for your journey from Rapid City to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Rapid City to Seattle?

    There are many flights that can get you from Rapid City to Seattle in 6h 06m. Fly via United Airlines to get the fastest option. Rapid City and Seattle are separated by a distance of 954 mi.

  • What is the cheapest airline to fly from Rapid City to Seattle round-trip?

    Our cheapest airline available from Rapid City to Seattle is United Airlines. Our recent data shows that you can find tickets from as low as $274 on this airline. Users have found that United Airlines is 42% cheaper than the other options available to this destination.

  • Can I find deals for flights from Rapid City to Seattle that include hotel bookings?

    Yes. In addition to deals on Rapid City to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Rapid City to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Rapid City to Seattle.

  • Can I find deals for business class flights from Rapid City to Seattle?

    Yes. Cheapflights offers flight deals from Rapid City 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 Rapid City to Seattle?

    Currently, February is the cheapest month in which you can book a flight from Rapid City to Seattle (average of $298). Flying from Rapid City to Seattle in January is currently the most expensive (average of $648). 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

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tacoma
Renton
Lacey
Leavenworth
Olympia
Edmonds
Snoqualmie
Tumwater
Tukwila
Centralia
Puyallup
Kent
Ellensburg
Fife
Marysville
Ocean Shores
Lakewood
Lynnwood
Issaquah

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Rapid City to Seattle

Discover the top airline that operate flights from Rapid City to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$274Average$455FlexibilityNo cancel feeOn-time69%

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