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$239+ Cheap flights from Rapid City (RAP) to Idaho

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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — BOI
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap 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 December 15, 2025.

This United Airlines deal was found by Cheapflights users on 12/14. 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.
Thu 12/1811:11 amRAP - BOI
1 stop6h 52mUnited Airlines
Sat 12/205:12 pmBOI - RAP
1 stop4h 47mUnited Airlines
Deal found 12/14$415
This United Airlines deal was found by Cheapflights users on 12/15. 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.
Tue 12/303:35 pmRAP - GEG
1 stop6h 23mUnited Airlines
Sat 1/35:05 amGEG - RAP
1 stop6h 41mUnited Airlines
Deal found 12/15$478
This Delta deal was found by Cheapflights users on 12/15. 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.
Tue 12/304:14 pmRAP - GEG
1 stop8h 02mDelta
Sat 1/31:15 pmGEG - RAP
2 stops8h 26mDelta
Deal found 12/15$1,264

Find 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 December 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$239
(Delta)

Popular in

June

Cheapest in

January

Average price

$492
Provider with most accurate pricing for Rapid City-Boise Air Term. Gowen Fld flight deals.
Search Deals
Provider most trusted by Cheapflights users for Rapid City-Boise Air Term. Gowen Fld flights.
Search Deals
From Rapid City to Idaho
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($47 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 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 CityBoise

RAP - BOI

RAPBOI

Rapid City

Sat 1/10

6:00 am-2:02 pm

1 stop8h 02m

Boise Air Term. Gowen Fld

Sat 1/17

3:01 pm-10:28 pm

1 stop7h 27m

$239

Rapid CityIdaho Falls

RAP - IDA

RAPIDA

Rapid City

Tue 1/27

8:30 am-3:31 pm

1 stop7h 01m

Idaho Falls Fanning Field

Sat 1/31

6:30 am-1:12 pm

1 stop6h 42m

$309

Rapid CityIdaho Falls

RAP - IDA

RAPIDA

Rapid City

Tue 1/13

5:10 am-9:56 am

1 stop4h 46m

Idaho Falls Fanning Field

Sat 1/17

2:40 pm-7:14 pm

1 stop4h 34m

$309

Rapid CityBoise

RAP - BOI

RAPBOI

Rapid City

Wed 1/28

7:00 am-1:35 pm

1 stop6h 35m

Boise Air Term. Gowen Fld

Sat 1/31

5:16 pm-10:29 pm

1 stop5h 13m

$339

Rapid CityBoise

RAP - BOI

RAPBOI

Rapid City

Sat 1/10

2:40 pm-7:45 pm

1 stop5h 05m

Boise Air Term. Gowen Fld

Tue 1/13

2:37 pm-8:32 pm

1 stop5h 55m

$339

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

Wed 1/28

2:40 pm-9:22 pm

1 stop7h 42m

Spokane

Sat 1/31

1:48 pm-7:14 pm

1 stop4h 26m

$339

Rapid CityBoise

RAP - BOI

RAPBOI

Rapid City

Wed 2/25

6:00 am-1:59 pm

1 stop7h 59m

Boise Air Term. Gowen Fld

Fri 2/27

2:54 pm-10:27 pm

1 stop7h 33m

$401

Rapid CityBoise

RAP - BOI

RAPBOI

Rapid City

Wed 2/25

2:52 pm-9:32 pm

1 stop6h 40m

Boise Air Term. Gowen Fld

Fri 2/27

7:11 am-1:13 pm

2 stops30h 02m

$462

Rapid CityBoise

RAP - BOI

RAPBOI

Rapid City

Sat 1/10

2:08 pm-12:07 pm

2 stops21h 59m

Boise Air Term. Gowen Fld

Sat 1/17

2:52 pm-1:34 pm

2 stops22h 42m

$560

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

Tue 12/30

4:14 pm-11:16 pm

1 stop8h 02m

Spokane

Sat 1/3

1:15 pm-10:41 pm

2 stops8h 26m

$1,264

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

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, January is the cheapest month in which you can book a flight from Rapid City to Idaho (average of $248). Flying from Rapid City to Idaho in June is currently the most expensive (average of $449). 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 December 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
7.9
Good
8,008 reviews

Overall

7.9

Boarding

8.1

Food

7.3

Entertainment

7.9

Crew

8.5

Comfort

7.9

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
8,008 reviews
Delta
7.9
Good
8,008 reviews

Overall

7.9

Boarding

8.1

Food

7.3

Entertainment

7.9

Crew

8.5

Comfort

7.9

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
9,092 reviews
Delta
7.9
Good
8,008 reviews

Overall

7.9

Boarding

8.1

Food

7.3

Entertainment

7.9

Crew

8.5

Comfort

7.9

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 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 $309, Delta can have you in Idaho from Rapid City in 7h 01m. 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 - Boise Air Term. Gowen Fld or Rapid City - Idaho Falls Fanning Field, Rapid City - Spokane 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, January is the cheapest month in which you can book a flight from Rapid City to Idaho (average of $248). Flying from Rapid City to Idaho in June is currently the most expensive (average of $449). 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

See prices for flight routes from nearby airports that may be better suited for you.
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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 December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$248Average$248FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$248Average$399FlexibilityNo cancel feeOn-time69%

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