HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

$178+ 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 8/11. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — SEA
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Rapid City to Seattle with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 July 29, 2025.

Round-trip from

$259
(Delta)

One-way from

$178
(Sun Country Air)

Popular in

April

Cheapest in

March

Average price

$512
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, 0% potential price rise
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

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 July 29, 2025.

This Delta deal was found by Cheapflights users on 7/29. 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.
Tue 9/232:27 pmRAP - SEA
1 stop6h 49mDelta
Sun 9/286:00 amSEA - RAP
1 stop8h 43mDelta
Deal found 7/29$259
This Sun Country Air deal was found by Cheapflights users on 7/28. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/295:15 pmRAP - SEA
1 stop28h 23mSun Country Air
Mon 9/19:13 amSEA - RAP
1 stop6h 15mSun Country Air
Deal found 7/28$310
This United Airlines deal was found by Cheapflights users on 7/29. 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.
Sat 8/164:38 pmRAP - SEA
1 stop7h 21mUnited Airlines
Sat 8/231:05 pmSEA - RAP
2 stops7h 54mUnited Airlines
Deal found 7/29$395
This Trip.com deal was found by Cheapflights users on 7/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/155:27 pmRAP - SEA
2 stops26h 19mMultiple Airlines
Sun 8/176:25 amSEA - RAP
2 stops32h 44mMultiple Airlines
Deal found 7/29$420
This American Airlines deal was found by Cheapflights users on 7/28. 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.
Mon 8/186:12 pmRAP - SEA
1 stop16h 07mAmerican Airlines
Thu 8/2112:46 amSEA - RAP
1 stop15h 56mAmerican Airlines
Deal found 7/28$493

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 29, 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

Tue 9/23

2:27 pm-8:16 pm

1 stop6h 49m

Seattle/Tacoma Intl

Sun 9/28

6:00 am-3:43 pm

1 stop8h 43m

$259

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Fri 8/29

5:15 pm-8:38 pm

1 stop28h 23m

Seattle/Tacoma Intl

Mon 9/1

9:13 am-4:28 pm

1 stop6h 15m

$310

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Sat 8/16

4:38 pm-10:59 pm

1 stop7h 21m

Seattle/Tacoma Intl

Sat 8/23

1:05 pm-9:59 pm

2 stops7h 54m

$395

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Fri 8/15

5:27 pm-6:46 pm

2 stops26h 19m

Seattle/Tacoma Intl

Sun 8/17

6:25 am-4:09 pm

2 stops32h 44m

$420

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Mon 8/18

6:12 pm-9:19 am

1 stop16h 07m

Seattle/Tacoma Intl

Thu 8/21

12:46 am-5:42 pm

1 stop15h 56m

$493

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Mon 8/11

5:28 pm-8:02 am

1 stop15h 34m

$178

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Thu 8/21

4:25 pm-11:54 pm

1 stop8h 29m

$181

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Fri 8/22

10:15 am-10:15 pm

2 stops13h 00m

$221

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Thu 8/28

6:12 pm-9:19 am

1 stop16h 07m

$284

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Wed 8/6

5:08 pm-10:50 pm

3 stops30h 42m

$463

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

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 $389). 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 July 29, 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 July 29, 2025.
See what other customers who have flown with Delta, United Airlines, and American 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
7,977 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

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
7,977 reviews
Delta
8.0
Very good
7,977 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

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
8,899 reviews
Delta
8.0
Very good
7,977 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

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!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,977 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

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!
Sun Country Air
6.9
Okay
333 reviews
Delta
8.0
Very good
7,977 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

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.

  • 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 $259 on this airline. Additional options worth looking into are Sun Country Air and United Airlines, starting at $310 and $395 round-trip. Users have found that Delta is 46% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Rapid City to Seattle one-way?

    The cheapest airlines for a one-way flight from Rapid City to Seattle are Sun Country Air ($178), Delta ($181), and United Airlines ($221).

  • 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 $389). 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
Ocean Shores
Lakewood
Lynnwood
Lacey
Leavenworth
Renton
Olympia
Puyallup
Kent
Cle Elum
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline
Federal Way
Shelton

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$258Average$368FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$282Average$535FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.