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$231+ 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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — SEA
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
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 October 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$259
(United Airlines)

One-way from

$231
(Delta)

Popular in

April

Cheapest in

October

Average price

$321
Provider with most accurate pricing for Rapid City-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Rapid City-Seattle/Tacoma Intl flights.
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From Rapid City to Seattle/Tacoma Intl
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One-way flight from Rapid City to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 9% potential increase in price ($47 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in October 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 October 28, 2025.

This United Airlines deal was found by Cheapflights users on 10/26. 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.
Wed 11/195:15 amRAP - SEA
1 stop6h 20mUnited Airlines
Sat 11/225:05 amSEA - RAP
1 stop6h 35mUnited Airlines
Deal found 10/26$259
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/206:00 pmRAP - SEA
1 stop6h 10mUnited Airlines
Tue 11/259:04 amSEA - RAP
2 stops10h 22mUnited Airlines
Deal found 10/28$283
This United Airlines deal was found by Cheapflights users on 10/27. 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.
Tue 11/115:15 amRAP - SEA
1 stop6h 20mUnited Airlines
Sat 11/1512:00 pmSEA - RAP
1 stop5h 43mUnited Airlines
Deal found 10/27$289
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/126:00 pmRAP - SEA
1 stop6h 10mUnited Airlines
Sun 11/165:05 amSEA - RAP
1 stop5h 00mUnited Airlines
Deal found 10/28$309
This Delta deal was found by Cheapflights users on 10/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1211:02 amRAP - SEA
1 stop6h 58mDelta
Tue 12/1611:55 pmSEA - RAP
1 stop9h 27mDelta
Deal found 10/26$319
This United Airlines deal was found by Cheapflights users on 10/27. 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.
Mon 11/311:15 amRAP - SEA
1 stop7h 55mUnited Airlines
Mon 11/105:05 amSEA - RAP
1 stop5h 00mUnited Airlines
Deal found 10/27$334

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 October 28, 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 1/20

7:00 am-1:57 pm

1 stop7h 57m

Seattle/Tacoma Intl

Wed 2/11

8:40 am-5:12 pm

1 stop7h 32m

$259

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Wed 11/19

5:15 am-1:38 pm

2 stops9h 23m

Seattle/Tacoma Intl

Sat 11/22

5:05 am-12:40 pm

1 stop6h 35m

$264

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Thu 11/20

5:15 am-1:38 pm

2 stops9h 23m

Seattle/Tacoma Intl

Tue 11/25

9:04 am-8:26 pm

2 stops10h 22m

$289

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Tue 11/11

5:15 am-10:35 am

1 stop6h 20m

Seattle/Tacoma Intl

Sat 11/15

12:00 pm-6:43 pm

1 stop5h 43m

$289

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Wed 11/12

6:00 pm-11:10 pm

1 stop6h 10m

Seattle/Tacoma Intl

Sun 11/16

5:05 am-11:05 am

1 stop5h 00m

$309

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Fri 12/12

11:02 am-5:00 pm

1 stop6h 58m

Seattle/Tacoma Intl

Tue 12/16

11:55 pm-10:22 am

1 stop9h 27m

$319

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Sat 2/28

6:20 am-5:00 pm

2 stops11h 40m

Seattle/Tacoma Intl

Tue 3/3

6:05 am-3:14 pm

1 stop8h 09m

$324

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Sat 2/28

2:52 pm-9:14 pm

1 stop7h 22m

Seattle/Tacoma Intl

Tue 3/3

9:00 am-3:17 pm

1 stop5h 17m

$329

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Wed 11/12

4:25 pm-12:01 am

1 stop8h 36m

$231

Rapid CitySeattle

RAP - SEA

RAPSEA

Rapid City

Wed 11/12

8:45 am-8:51 pm

3 stops13h 06m

$276

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 13 results
1
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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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Rapid City-Seattle flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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, January is the cheapest month in which you can book a flight from Rapid City to Seattle (average of $258). Flying from Rapid City to Seattle in June is currently the most expensive (average of $440). 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 October 28, 2025.

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

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 October 28, 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
7.9
Good
7,994 reviews

Crew

8.5

Boarding

8.2

Overall

7.9

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,994 reviews
Delta
7.9
Good
7,994 reviews

Crew

8.5

Boarding

8.2

Overall

7.9

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
9,001 reviews
Delta
7.9
Good
7,994 reviews

Crew

8.5

Boarding

8.2

Overall

7.9

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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 57m. 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 $273. Users have found that Delta is 41% 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 Delta ($231), United Airlines ($276), and American Airlines ($336).

  • 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 $258). Flying from Rapid City to Seattle in June is currently the most expensive (average of $440). 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
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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 October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$258Average$368FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$273Average$473FlexibilityNo cancel feeOn-time69%

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