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$259+ Cheap flights from Rapid City to Seattle (RAP - SEA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/22. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — SEA
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 September 11, 2025.

Round-trip from

$259
(Delta)

Popular in

April

Cheapest in

March

Average price

$470
From Rapid City to Seattle/Tacoma Intl
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 3% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 11, 2025.

This Delta deal was found by Cheapflights users on 9/9. 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 10/224:34 pmRAP - SEA
1 stop8h 23mDelta
Wed 11/196:00 amSEA - RAP
1 stop7h 11mDelta
Deal found 9/9$259
This United Airlines deal was found by Cheapflights users on 9/10. 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 11/2111:15 amRAP - SEA
1 stop7h 55mUnited Airlines
Wed 11/268:36 amSEA - RAP
1 stop7h 24mUnited Airlines
Deal found 9/10$299
This United Airlines deal was found by Cheapflights users on 9/9. 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 10/227:00 amRAP - SEA
2 stops8h 24mUnited Airlines
Wed 11/195:00 amSEA - RAP
1 stop5h 05mUnited Airlines
Deal found 9/9$309
This United Airlines deal was found by Cheapflights users on 9/10. 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 9/185:59 pmRAP - SEA
1 stop6h 00mUnited Airlines
Fri 10/312:43 pmSEA - RAP
1 stop6h 51mUnited Airlines
Deal found 9/10$314
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/29:56 amRAP - SEA
1 stop6h 36mUnited Airlines
Thu 10/95:00 amSEA - RAP
1 stop6h 37mUnited Airlines
Deal found 9/11$329
This United Airlines deal was found by Cheapflights users on 9/9. 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 10/35:50 pmRAP - SEA
1 stop6h 39mUnited Airlines
Sat 10/116:35 amSEA - RAP
2 stops9h 25mUnited Airlines
Deal found 9/9$335
This United Airlines deal was found by Cheapflights users on 9/9. 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 9/245:30 amRAP - SEA
1 stop5h 27mUnited Airlines
Sun 9/285:00 amSEA - RAP
1 stop4h 57mUnited Airlines
Deal found 9/9$359

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 September 11, 2025.
Use the filters below to find and compare flights from Rapid City to Seattle that are best for you.

Fly from

Rapid City

Fly to

Seattle

Route

Depart

Return

Price

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Fri 11/21

11:15 am-6:10 pm

1 stop7h 55m

Seattle/Tacoma Intl

Wed 11/26

8:36 am-5:00 pm

1 stop7h 24m

$299

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Wed 10/22

7:00 am-2:24 pm

2 stops8h 24m

Seattle/Tacoma Intl

Wed 11/19

5:00 am-11:05 am

1 stop5h 05m

$309

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Thu 10/2

9:56 am-3:32 pm

1 stop6h 36m

Seattle/Tacoma Intl

Thu 10/9

5:00 am-12:37 pm

1 stop6h 37m

$329

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Fri 10/3

5:50 pm-11:29 pm

1 stop6h 39m

Seattle/Tacoma Intl

Sat 10/11

6:35 am-5:00 pm

2 stops9h 25m

$335

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Sat 2/28

6:20 am-1:00 pm

1 stop7h 40m

Seattle/Tacoma Intl

Tue 3/3

6:05 am-3:14 pm

1 stop8h 09m

$343

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Fri 9/26

4:24 pm-11:43 pm

1 stop8h 19m

Seattle/Tacoma Intl

Tue 9/30

6:00 am-3:43 pm

1 stop8h 43m

$359

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Wed 9/24

5:30 am-1:30 pm

2 stops9h 00m

Seattle/Tacoma Intl

Sun 9/28

5:00 am-10:57 am

1 stop4h 57m

$364

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Fri 9/26

12:56 pm-5:53 pm

1 stop5h 57m

Seattle/Tacoma Intl

Sun 10/5

5:00 am-10:57 am

1 stop4h 57m

$374

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Sat 11/8

3:18 pm-9:13 pm

1 stop6h 55m

$276

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

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, January is the cheapest month in which you can book a flight from Rapid City to Seattle (average of $238). Flying from Rapid City to Seattle in June is currently the most expensive (average of $388). 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.

What is the cheapest time of day to fly from RAP to SEA?

Find hourly flight availability from Rapid City to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

It’s typically best to fly out from Rapid City to Seattle at noon. Doing so could potentially save you 8% on the flight price compared to flying in the morning, which is usually more expensive.

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 September 11, 2025.
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
8.0
Very good
7,960 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,937 reviews
Delta
8.0
Very good
7,960 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 7h 55m. 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 $258 on this airline. An additional option worth looking into is United Airlines, starting at $282. Users have found that Delta is 46% 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, January is the cheapest month in which you can book a flight from Rapid City to Seattle (average of $238). Flying from Rapid City to Seattle in June is currently the most expensive (average of $388). 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
Tukwila
Tacoma
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Lacey
Renton
Olympia
Kent
Federal Way
Cle Elum
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen
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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$258Average$368FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$282Average$512FlexibilityNo cancel feeOn-time69%

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