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$125+ 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 7/20. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — BOI
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$249
(United Airlines)

One-way from

$125
(Mytrip)

Popular in

November

Cheapest in

January

Average price

$494
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. 15% potential increase in price ($68 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This United Airlines deal was found by Cheapflights users on 6/10. 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.
Wed 8/205:30 amRAP - BOI
1 stop4h 12mUnited Airlines
Sun 8/245:00 amBOI - RAP
1 stop4h 06mUnited Airlines
Deal found 6/10$249
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/96:50 amRAP - BOI
1 stop7h 22mDelta
Tue 7/1512:50 pmBOI - RAP
2 stops9h 41mDelta
Deal found 6/10$254
This United Airlines deal was found by Cheapflights users on 6/11. 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 6/198:40 amRAP - GEG
1 stop4h 55mUnited Airlines
Thu 6/261:37 pmGEG - RAP
1 stop6h 10mUnited Airlines
Deal found 6/11$284
This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/39:59 pmRAP - BOI
1 stop10h 49mMultiple Airlines
Sun 7/65:50 pmBOI - RAP
1 stop22h 37mMultiple Airlines
Deal found 6/10$295
This American Airlines deal was found by Cheapflights users on 6/12. 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.
Fri 9/512:32 pmRAP - BOI
1 stop9h 16mAmerican Airlines
Mon 9/81:38 pmBOI - RAP
1 stop7h 15mAmerican Airlines
Deal found 6/12$301
This United Airlines deal was found by Cheapflights users on 6/12. 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 6/275:30 amRAP - IDA
1 stop4h 14mUnited Airlines
Tue 7/14:13 pmIDA - RAP
1 stop4h 34mUnited Airlines
Deal found 6/12$323
This Mytrip deal was found by Cheapflights users on 6/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/109:59 pmRAP - GEG
2 stops20h 03mMultiple Airlines
Thu 7/179:33 amGEG - RAP
1 stop10h 36mMultiple Airlines
Deal found 6/12$448
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/294:30 pmRAP - GEG
2 stops8h 08mDelta
Sat 8/22:22 pmGEG - RAP
1 stop7h 09mDelta
Deal found 6/10$454
This American Airlines deal was found by Cheapflights users on 6/12. 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.
Tue 7/14:39 pmRAP - GEG
1 stop7h 41mAmerican Airlines
Sat 7/56:00 amGEG - RAP
1 stop7h 01mAmerican Airlines
Deal found 6/12$525
This Delta deal was found by Cheapflights users on 6/12. 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 6/2711:51 amRAP - IDA
2 stops11h 04mDelta
Tue 7/11:09 pmIDA - RAP
2 stops9h 22mDelta
Deal found 6/12$1,651

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 June 12, 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

Wed 8/20

5:30 am-9:42 am

1 stop4h 12m

Boise Air Term. Gowen Fld

Sun 8/24

5:00 am-9:06 am

1 stop4h 06m

$249

Rapid CityBoise

RAP - BOI

RAPBOI

Rapid City

Wed 7/9

6:50 am-2:12 pm

1 stop7h 22m

Boise Air Term. Gowen Fld

Tue 7/15

12:50 pm-10:31 pm

2 stops9h 41m

$254

Rapid CityBoise

RAP - BOI

RAPBOI

Rapid City

Thu 7/3

9:59 pm-8:48 am

1 stop10h 49m

Boise Air Term. Gowen Fld

Sun 7/6

5:50 pm-4:27 pm

1 stop22h 37m

$295

Rapid CityBoise

RAP - BOI

RAPBOI

Rapid City

Fri 9/5

12:32 pm-9:48 pm

1 stop9h 16m

Boise Air Term. Gowen Fld

Mon 9/8

1:38 pm-8:53 pm

1 stop7h 15m

$301

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

Thu 7/10

11:16 am-5:27 pm

1 stop7h 11m

Spokane

Thu 7/17

5:30 am-12:46 pm

1 stop6h 16m

$303

Rapid CityIdaho Falls

RAP - IDA

RAPIDA

Rapid City

Fri 6/27

5:30 am-9:44 am

1 stop4h 14m

Idaho Falls Fanning Field

Tue 7/1

4:13 pm-8:47 pm

1 stop4h 34m

$323

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

Thu 7/10

9:59 pm-5:02 pm

2 stops20h 03m

Spokane

Thu 7/17

9:33 am-9:09 pm

1 stop10h 36m

$448

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

Tue 7/29

4:30 pm-11:38 pm

2 stops8h 08m

Spokane

Sat 8/2

2:22 pm-10:31 pm

1 stop7h 09m

$454

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

Tue 7/1

4:39 pm-11:20 pm

1 stop7h 41m

Spokane

Sat 7/5

6:00 am-2:01 pm

1 stop7h 01m

$525

Rapid CityIdaho Falls

RAP - IDA

RAPIDA

Rapid City

Fri 6/27

11:51 am-10:55 pm

2 stops11h 04m

Idaho Falls Fanning Field

Tue 7/1

1:09 pm-10:31 pm

2 stops9h 22m

$1,651

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 17 results
1
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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 $395). 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.

Rainfall in Idaho by month

Plan your trip to Idaho by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Idaho ranges from 0.2 - 1.6 inches per month. December is typically the wettest month, when rainfall can reach 1.6 in. August is typically the driest time to visit Idaho when rainfall is around 0.2 in.

Temperature in Idaho by month

Plan your trip to Idaho by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Idaho, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 30.2 F).

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 June 12, 2025.
Get a feel of what it's like to fly with Delta, United Airlines and American Airlines from Rapid City to Idaho by reading reviews from past customers. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

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
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

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
8,790 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

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!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

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 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.

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

    For one-way options, check prices for United Airlines. According to our data, you can fly for as low as $166. Users have also found prices from $225 and $256 on Delta and American Airlines, respectively.

  • 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 $395). 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$248Average$248FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$248Average$418FlexibilityNo cancel feeOn-time69%

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