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$139+ 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 8/2. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — SEA
May 23 — May 301
Sat 5/23
Sat 5/30
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 April 23, 2026.

This United Airlines deal was found by Cheapflights users on 4/19. 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 5/155:35 pm
RAP
-
SEA
1 stop6h 24m
United Airlines
Sun 5/245:07 am
SEA
-
RAP
1 stop6h 22m
United Airlines
Deal found 4/19$339
This United Airlines deal was found by Cheapflights users on 4/21. 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.
Wed 5/61:00 pm
RAP
-
SEA
1 stop6h 00m
United Airlines
Sun 5/105:05 am
SEA
-
RAP
1 stop7h 04m
United Airlines
Deal found 4/21$369
This Delta deal was found by Cheapflights users on 4/21. 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.
Fri 5/82:36 pm
RAP
-
SEA
2 stops10h 36m
Delta
Mon 5/116:00 am
SEA
-
RAP
1 stop8h 48m
Delta
Deal found 4/21$374
This Kiwi.com deal was found by Cheapflights users on 4/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/99:50 pm
RAP
-
SEA
1 stop13h 45m
Multiple Airlines
Sat 7/118:13 pm
SEA
-
RAP
1 stop23h 47m
Multiple Airlines
Deal found 4/22$387
This Delta deal was found by Cheapflights users on 4/22. 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.
Fri 6/54:33 pm
RAP
-
SEA
1 stop8h 10m
Delta
Wed 6/102:30 pm
SEA
-
RAP
1 stop7h 07m
Delta
Deal found 4/22$389
This American Airlines deal was found by Cheapflights users on 4/19. 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 6/115:00 pm
RAP
-
SEA
1 stop8h 59m
American Airlines
Mon 6/155:10 am
SEA
-
RAP
1 stop10h 20m
American Airlines
Deal found 4/19$391
This Delta deal was found by Cheapflights users on 4/21. 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.
Wed 6/174:30 pm
RAP
-
SEA
2 stops8h 29m
Delta
Sat 6/202:30 pm
SEA
-
RAP
1 stop7h 07m
Delta
Deal found 4/21$394
This Kiwi.com deal was found by Cheapflights users on 4/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/105:57 pm
RAP
-
SEA
1 stop17h 25m
Multiple Airlines
Wed 5/137:50 pm
SEA
-
RAP
2 stops20h 17m
Multiple Airlines
Deal found 4/20$400
This Delta deal was found by Cheapflights users on 4/18. 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 5/74:33 pm
RAP
-
SEA
1 stop8h 11m
Delta
Tue 5/126:00 am
SEA
-
RAP
1 stop8h 48m
Delta
Deal found 4/18$404

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 April 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$339
(United Airlines)

One-way from

$144
(Kiwi.com)

Popular in

August

Cheapest in

February

Average price

$398
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
Highest demand for flights based on searches. 14% potential increase in price ($74 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 23, 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

5:53 pm-11:11 pm

1 stop6h 18m

Seattle/Tacoma Intl

Tue 9/1

2:26 pm-10:23 pm

1 stop6h 57m

$419
Quickest round-trip

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Thu 6/4

5:53 pm-11:10 pm

1 stop6h 17m

Seattle/Tacoma Intl

Sun 6/7

5:00 am-12:29 pm

1 stop6h 29m

$423

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Thu 5/7

2:36 pm-12:12 am

2 stops10h 36m

Seattle/Tacoma Intl

Tue 5/12

6:00 am-3:48 pm

1 stop8h 48m

$429

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Sat 8/22

6:20 am-6:29 pm

2 stops13h 09m

Seattle/Tacoma Intl

Tue 9/15

11:53 pm-9:58 am

1 stop9h 05m

$443

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Thu 5/7

5:20 am-2:36 pm

2 stops10h 16m

Seattle/Tacoma Intl

Tue 5/12

8:45 am-8:28 pm

2 stops10h 43m

$480
Cheapest one-way

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Sun 8/2

9:50 pm-10:35 am

1 stop13h 45m

$139

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Tue 7/28

4:28 pm-11:58 pm

1 stop8h 30m

$191

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Tue 8/4

3:25 pm-11:35 pm

1 stop9h 10m

$191
Quickest one-way

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Mon 8/10

5:28 pm-10:46 pm

1 stop6h 18m

$199

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Mon 6/15

4:30 pm-11:59 pm

1 stop8h 29m

$222

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/18

Showing 1-10 of 14 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 April.
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 $288). Flying from Rapid City to Seattle in August is currently the most expensive (average of $565). 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?

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 April 23, 2026.
See what other customers who have flown with Delta and 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.
Delta
7.9
Good
8,438 reviews

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,438 reviews
Delta
7.9
Good
8,438 reviews

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,637 reviews
Delta
7.9
Good
8,438 reviews

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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 18m. Fly via United Airlines to get the fastest option. Rapid City and Seattle are separated by a distance of 954 mi.

  • What are the cheapest airlines flying from Rapid City to Seattle round-trip?

    Our cheapest airline available from Rapid City to Seattle is Delta. Our recent data shows that you can find tickets from as low as $264 on this airline. An additional option worth looking into is United Airlines, starting at $274. Users have found that Delta is 38% 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 $288). Flying from Rapid City to Seattle in August is currently the most expensive (average of $565). 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
Ocean Shores
Olympia
Lynnwood
Lacey
Edmonds
Leavenworth
Snoqualmie
Kent
Tumwater
Tukwila
Puyallup
Renton
Kirkland
Ellensburg
Fife
Lakewood
Issaquah
Shoreline

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Rapid City to Seattle

Discover the top 2 airlines 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 April 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$264Average$399FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$274Average$468FlexibilityNo cancel feeOn-time69%

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