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$274+ 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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — BOI
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$274
(United Airlines)

Popular in

November

Cheapest in

January

Average price

$550
Provider with most accurate pricing for Rapid City-Boise Air Term. Gowen Fld flight deals.
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Provider most trusted by Cheapflights users for Rapid City-Boise Air Term. Gowen Fld flights.
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From Rapid City to Idaho
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Highest demand for flights based on searches. 10% potential increase in price ($45 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in May 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 May 1, 2025.

This United Airlines deal was found by Cheapflights users on 4/29. 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.
Thu 5/153:43 pmRAP - BOI
1 stop5h 59mUnited Airlines
Mon 5/195:25 pmBOI - RAP
1 stop4h 51mUnited Airlines
Deal found 4/29$274
This United Airlines deal was found by Cheapflights users on 4/30. 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 5/153:43 pmRAP - IDA
1 stop7h 02mUnited Airlines
Mon 5/194:22 pmIDA - RAP
1 stop5h 54mUnited Airlines
Deal found 4/30$299
This Delta deal was found by Cheapflights users on 4/29. 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.
Sat 6/146:35 amRAP - GEG
1 stop7h 42mDelta
Sat 6/216:50 amGEG - RAP
1 stop8h 02mDelta
Deal found 4/29$324
This United Airlines deal was found by Cheapflights users on 4/30. 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 6/174:30 pmRAP - GEG
1 stop5h 18mUnited Airlines
Tue 6/245:30 amGEG - RAP
1 stop6h 06mUnited Airlines
Deal found 4/30$400
This Mytrip deal was found by Cheapflights users on 4/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/143:31 pmRAP - BOI
3 stops41h 10mMultiple Airlines
Sat 6/212:35 pmBOI - RAP
2 stops30h 37mMultiple Airlines
Deal found 4/29$425
This Delta deal was found by Cheapflights users on 4/30. 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.
Sat 6/1411:51 amRAP - BOI
2 stops12h 25mDelta
Sat 6/2110:24 amBOI - RAP
1 stop5h 28mDelta
Deal found 4/30$523
This American Airlines deal was found by Cheapflights users on 4/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/142:53 pmRAP - BOI
1 stop20h 03mAmerican Airlines
Sat 6/215:16 pmBOI - RAP
2 stops19h 03mAmerican Airlines
Deal found 4/29$589
This American Airlines deal was found by Cheapflights users on 4/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/25:36 amRAP - IDA
2 stops16h 34mAmerican Airlines
Sat 5/37:43 amIDA - RAP
2 stops12h 37mAmerican Airlines
Deal found 4/29$1,200
This Delta deal was found by Cheapflights users on 4/29. 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.
Wed 8/2010:40 amRAP - IDA
2 stops7h 32mDelta
Fri 8/226:10 amIDA - RAP
2 stops7h 22mDelta
Deal found 4/29$1,247

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 May 1, 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

Thu 5/15

3:43 pm-9:42 pm

1 stop5h 59m

Boise Air Term. Gowen Fld

Mon 5/19

5:25 pm-10:16 pm

1 stop4h 51m

$274

Rapid CityIdaho Falls

RAP - IDA

RAPIDA

Rapid City

Thu 5/15

3:43 pm-10:45 pm

1 stop7h 02m

Idaho Falls Fanning Field

Mon 5/19

4:22 pm-10:16 pm

1 stop5h 54m

$299

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

Sat 6/14

6:35 am-1:17 pm

1 stop7h 42m

Spokane

Sat 6/21

6:50 am-3:52 pm

1 stop8h 02m

$324

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

Tue 6/17

4:30 pm-8:48 pm

1 stop5h 18m

Spokane

Tue 6/24

5:30 am-12:36 pm

1 stop6h 06m

$400

Rapid CityBoise

RAP - BOI

RAPBOI

Rapid City

Sat 6/14

3:31 pm-8:41 am

3 stops41h 10m

Boise Air Term. Gowen Fld

Sat 6/21

2:35 pm-9:12 pm

2 stops30h 37m

$425

Rapid CityBoise

RAP - BOI

RAPBOI

Rapid City

Sat 6/14

11:51 am-12:16 am

2 stops12h 25m

Boise Air Term. Gowen Fld

Sat 6/21

10:24 am-3:52 pm

1 stop5h 28m

$523

Rapid CityBoise

RAP - BOI

RAPBOI

Rapid City

Sat 6/14

2:53 pm-10:56 am

1 stop20h 03m

Boise Air Term. Gowen Fld

Sat 6/21

5:16 pm-12:19 pm

2 stops19h 03m

$589

Rapid CityIdaho Falls

RAP - IDA

RAPIDA

Rapid City

Wed 8/20

10:40 am-6:12 pm

2 stops7h 32m

Idaho Falls Fanning Field

Fri 8/22

6:10 am-1:32 pm

2 stops7h 22m

$1,247

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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 $406). 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 May 1, 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
7,934 reviews

Food

7.3

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,934 reviews
Delta
8.0
Very good
7,934 reviews

Food

7.3

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,934 reviews

Food

7.3

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,934 reviews

Food

7.3

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 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 $406). 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 airline flying from Rapid City to Idaho

Discover the top airline 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$248Average$420FlexibilityNo cancel feeOn-time69%

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