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$176+ Cheap flights from Rapid City (RAP) to Idaho

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 10/22. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — BOI
10月 15 — 10月 221
週三 10/15
週三 10/22
1 adult, Economy
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Cheap flight deals from Rapid City to Idaho

Keep the following information in mind while searching for Rapid City to Idaho flight deals. Data was last updated 9月 15, 2025.

Round-trip from

$249
(Delta)

One-way from

$176
(Delta)

Popular in

September

Cheapest in

January

Average price

$706
From Rapid City to Idaho
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One-way flight from Rapid City to Idaho
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Highest demand for flights based on searches. 4% potential increase in price ($18 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($27 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 Idaho

Cheapest flights from Rapid City to Idaho
Explore the most affordable flight options available from Rapid City to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9月 15, 2025.

This Delta deal was found by Cheapflights users on 9/15. 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.
週三 10/296:05 amRAP - GEG
1 stop8h 00mDelta
週三 11/52:17 pmGEG - RAP
1 stop7h 19mDelta
Deal found 9/15$249
This Delta deal was found by Cheapflights users on 9/15. 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.
週五 10/316:05 amRAP - GEG
2 stops10h 48mDelta
週一 11/32:17 pmGEG - RAP
1 stop7h 19mDelta
Deal found 9/15$254
This Delta deal was found by Cheapflights users on 9/15. 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.
週五 10/316:05 amRAP - GEG
2 stops10h 48mDelta
週三 11/51:10 pmGEG - RAP
2 stops8h 26mDelta
Deal found 9/15$259
This Delta deal was found by Cheapflights users on 9/15. 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.
週三 10/296:05 amRAP - GEG
1 stop8h 00mDelta
週日 11/22:17 pmGEG - RAP
1 stop7h 19mDelta
Deal found 9/15$274
This United Airlines deal was found by Cheapflights users on 9/15. 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.
週三 10/155:30 amRAP - IDA
1 stop4h 18mUnited Airlines
週三 10/225:00 amIDA - RAP
1 stop4h 10mUnited Airlines
Deal found 9/15$275
This Delta deal was found by Cheapflights users on 9/14. 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.
週五 10/316:05 amRAP - GEG
2 stops10h 48mDelta
週日 11/21:10 pmGEG - RAP
2 stops8h 26mDelta
Deal found 9/14$284
This United Airlines deal was found by Cheapflights users on 9/14. 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.
週三 11/128:45 amRAP - GEG
1 stop5h 00mUnited Airlines
週四 11/201:47 pmGEG - RAP
1 stop7h 12mUnited Airlines
Deal found 9/14$298
This Delta deal was found by Cheapflights users on 9/14. 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.
週六 11/16:05 amRAP - GEG
2 stops10h 48mDelta
週一 11/32:17 pmGEG - RAP
1 stop7h 19mDelta
Deal found 9/14$299
This Delta deal was found by Cheapflights users on 9/14. 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.
週六 11/16:05 amRAP - GEG
2 stops10h 48mDelta
週三 11/51:10 pmGEG - RAP
2 stops8h 26mDelta
Deal found 9/14$304
This Delta deal was found by Cheapflights users on 9/15. 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.
週三 10/2910:33 amRAP - GEG
2 stops13h 15mDelta
週一 11/32:17 pmGEG - RAP
1 stop7h 19mDelta
Deal found 9/15$312
This United Airlines deal was found by Cheapflights users on 9/13. 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.
週六 10/49:00 amRAP - GEG
1 stop4h 36mUnited Airlines
週二 10/75:05 amGEG - RAP
1 stop6h 32mUnited Airlines
Deal found 9/13$319
This United Airlines deal was found by Cheapflights users on 9/13. 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.
週五 10/33:20 pmRAP - BOI
1 stop7h 10mUnited Airlines
週日 10/52:39 pmBOI - RAP
1 stop5h 55mUnited Airlines
Deal found 9/13$324

Cheapflights Fare Finder

 
Customize your flight search to find flights from Rapid City to Idaho 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 9月 15, 2025.
Use the filters below to find and compare flights from Rapid City to Idaho that are best for you.

Fly from

Rapid City

Fly to

Idaho

Route

Depart

Return

Price

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

週五 10/31

6:05 am-1:05 pm

1 stop8h 00m

Spokane

週一 11/3

2:17 pm-10:36 pm

1 stop7h 19m

$249

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

週五 10/31

6:05 am-1:05 pm

1 stop8h 00m

Spokane

週二 11/4

2:17 pm-10:36 pm

1 stop7h 19m

$249

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

週六 11/1

6:05 am-1:05 pm

1 stop8h 00m

Spokane

週一 11/3

2:17 pm-10:36 pm

1 stop7h 19m

$249

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

週四 10/30

6:05 am-1:05 pm

1 stop8h 00m

Spokane

週三 11/5

2:17 pm-10:36 pm

1 stop7h 19m

$249

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

週六 11/1

6:05 am-1:05 pm

1 stop8h 00m

Spokane

週六 11/8

5:45 am-1:45 pm

1 stop7h 00m

$249

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

週五 10/31

6:05 am-1:05 pm

1 stop8h 00m

Spokane

週三 11/5

2:17 pm-10:36 pm

1 stop7h 19m

$249

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

週四 10/30

6:05 am-1:05 pm

1 stop8h 00m

Spokane

週六 11/8

5:45 am-1:45 pm

1 stop7h 00m

$249

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

週三 10/29

6:05 am-1:05 pm

1 stop8h 00m

Spokane

週六 11/8

1:10 pm-10:36 pm

2 stops8h 26m

$254

Rapid CityIdaho Falls

RAP - IDA

RAPIDA

Rapid City

週三 10/15

5:30 am-9:48 am

1 stop4h 18m

Idaho Falls Fanning Field

週三 10/22

5:00 am-9:10 am

1 stop4h 10m

$275

Rapid CityBoise

RAP - BOI

RAPBOI

Rapid City

週二 3/3

3:21 pm-9:16 pm

1 stop5h 55m

Boise Air Term. Gowen Fld

週六 3/7

2:43 pm-8:33 pm

1 stop5h 50m

$319

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 20 results
1
2

Best time to book a flight from Rapid City to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho 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 Idaho

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

Currently, October is the cheapest month in which you can book a flight from Rapid City to Idaho (average of $314). Flying from Rapid City to Idaho in June is currently the most expensive (average of $398). 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.

Reviews of airlines servicing Idaho

Get insights into the airlines that provide service to Idaho. 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 Idaho. Reviews last updated 9月 15, 2025.
Read reviews from past customers who have flown Delta and United Airlines from Rapid City to Idaho. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,954 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Food

7.3

Boarding

8.2

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
7,954 reviews
Delta
8.0
Very good
7,954 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Food

7.3

Boarding

8.2

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
8,929 reviews
Delta
8.0
Very good
7,954 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Food

7.3

Boarding

8.2

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 Idaho. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Rapid City to Idaho?

    Located just 9.0 mi from the city center, Rapid City (RAP) is the airport most travelers will use when flying to Idaho from Rapid City.

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

    For as low as $275, Delta can have you in Idaho from Rapid City in 4h 18m. Rapid City and Idaho are separated by a distance of 450 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most popular routes from Rapid City to Idaho?

    While some choose either Rapid City - Spokane or Rapid City - Idaho Falls Fanning Field, Rapid City - Boise Air Term. Gowen Fld is the most popular route from Rapid City to Idaho.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Rapid City to Idaho (average of $314). Flying from Rapid City to Idaho in June is currently the most expensive (average of $398). 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

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Alternative routes for Rapid City to Idaho

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Top 2 airlines flying from Rapid City to Idaho

Discover the top 2 airlines that operate flights from Rapid City to Idaho. 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 9月 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$182Average$423FlexibilityNo cancel feeOn-time69%
DeltaCheapest$248Average$248FlexibilityNo cancel feeOn-timeN/A

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