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Idaho

$41+ Cheap flights from Denver (DEN) 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 10/2. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — BOI
Aug 26 — Sep 21
Tue 8/26
Tue 9/2
1 adult, Economy
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Cheap flight deals from Denver to Idaho

Keep the following information in mind while searching for Denver to Idaho flight deals. Data was last updated August 21, 2025.

Round-trip from

$79
(Frontier)

One-way from

$41
(FlightHub)

Popular in

December

Cheapest in

July

Average price

$292

Good round-trip deal

$105 or less

Good one-way deal

$99 or less
From Denver Intl to Idaho
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One-way flight from Denver Intl to Idaho
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Highest demand for flights based on searches. 21% potential increase in price ($80 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Denver Intl to Idaho.
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Price to beat on a one-way flight from Denver Intl to Idaho.
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Find flight deals from Denver to Idaho

Cheapest flights from Denver to Idaho
Explore the most affordable flight options available from Denver to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 21, 2025.

This Frontier deal was found by Cheapflights users on 8/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/79:38 amDEN - BOI
Nonstop1h 59mFrontier
Thu 9/1112:22 pmBOI - DEN
Nonstop2h 23mFrontier
Deal found 8/21$79
This Frontier deal was found by Cheapflights users on 8/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/49:38 amDEN - BOI
Nonstop1h 59mFrontier
Thu 9/1112:22 pmBOI - DEN
Nonstop2h 23mFrontier
Deal found 8/21$90
This Cheapflightsfares deal was found by Cheapflights users on 8/21. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/283:24 pmDEN - IDA
Nonstop1h 42mAllegiant Air
Sun 8/315:51 pmIDA - DEN
Nonstop1h 48mAllegiant Air
Deal found 8/21$90
This Priceline deal was found by Cheapflights users on 8/20. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/99:48 amDEN - BOI
Nonstop1h 55mFrontier
Sun 10/1212:28 pmBOI - DEN
Nonstop2h 00mFrontier
Deal found 8/20$94
This Priceline deal was found by Cheapflights users on 8/21. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/199:38 amDEN - BOI
Nonstop1h 59mFrontier
Sun 9/2112:22 pmBOI - DEN
Nonstop2h 23mFrontier
Deal found 8/21$95
This Frontier deal was found by Cheapflights users on 8/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/79:38 amDEN - BOI
Nonstop1h 59mFrontier
Sun 9/1412:22 pmBOI - DEN
Nonstop2h 23mFrontier
Deal found 8/21$102
This Frontier deal was found by Cheapflights users on 8/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/239:48 amDEN - BOI
Nonstop1h 55mFrontier
Fri 10/2412:28 pmBOI - DEN
Nonstop2h 00mFrontier
Deal found 8/21$107
This Frontier deal was found by Cheapflights users on 8/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/189:38 amDEN - BOI
Nonstop1h 59mFrontier
Sun 9/2112:22 pmBOI - DEN
Nonstop2h 23mFrontier
Deal found 8/21$111
This Frontier deal was found by Cheapflights users on 8/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/49:38 amDEN - BOI
Nonstop1h 59mFrontier
Sun 9/1412:22 pmBOI - DEN
Nonstop2h 23mFrontier
Deal found 8/21$112
This Priceline deal was found by Cheapflights users on 8/21. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/289:36 amDEN - BOI
Nonstop2h 02mFrontier
Sun 8/3112:33 pmBOI - DEN
Nonstop2h 15mFrontier
Deal found 8/21$114
This Frontier deal was found by Cheapflights users on 8/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/119:38 amDEN - GEG
Nonstop2h 20mFrontier
Thu 9/1811:53 amGEG - DEN
Nonstop2h 19mFrontier
Deal found 8/21$117
This Frontier deal was found by Cheapflights users on 8/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/169:48 amDEN - BOI
Nonstop1h 55mFrontier
Sun 10/1912:28 pmBOI - DEN
Nonstop2h 00mFrontier
Deal found 8/20$118

Cheapflights Fare Finder

 
Customize your flight search to find flights from Denver 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 August 21, 2025.
Use the filters below to find and compare flights from Denver to Idaho that are best for you.

Fly from

Denver

Fly to

Idaho

Route

Depart

Return

Price

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Sun 9/7

9:38 am-11:37 am

Nonstop1h 59m

Boise Air Term. Gowen Fld

Thu 9/11

12:22 pm-2:45 pm

Nonstop2h 23m

$79

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Thu 10/9

9:48 am-11:43 am

Nonstop1h 55m

Boise Air Term. Gowen Fld

Sun 10/12

12:28 pm-2:28 pm

Nonstop2h 00m

$94

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Fri 9/19

9:38 am-11:37 am

Nonstop1h 59m

Boise Air Term. Gowen Fld

Sun 9/21

12:22 pm-2:45 pm

Nonstop2h 23m

$95

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Sun 9/7

9:38 am-11:37 am

Nonstop1h 59m

Boise Air Term. Gowen Fld

Sun 9/14

12:22 pm-2:45 pm

Nonstop2h 23m

$102

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Thu 10/23

9:48 am-11:43 am

Nonstop1h 55m

Boise Air Term. Gowen Fld

Fri 10/24

12:28 pm-2:28 pm

Nonstop2h 00m

$107

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Thu 9/18

9:38 am-11:37 am

Nonstop1h 59m

Boise Air Term. Gowen Fld

Sun 9/21

12:22 pm-2:45 pm

Nonstop2h 23m

$111

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Thu 9/4

9:38 am-11:37 am

Nonstop1h 59m

Boise Air Term. Gowen Fld

Sun 9/14

12:22 pm-2:45 pm

Nonstop2h 23m

$112

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Thu 9/4

9:38 am-11:37 am

Nonstop1h 59m

Boise Air Term. Gowen Fld

Sun 9/7

12:22 pm-2:45 pm

Nonstop2h 23m

$112

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Thu 8/28

9:36 am-11:38 am

Nonstop2h 02m

Boise Air Term. Gowen Fld

Sun 8/31

12:33 pm-2:48 pm

Nonstop2h 15m

$114

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Thu 10/16

9:48 am-11:43 am

Nonstop1h 55m

Boise Air Term. Gowen Fld

Sun 10/19

12:28 pm-2:28 pm

Nonstop2h 00m

$114

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/20

Showing 1-10 of 60 results
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Best time to book a flight from Denver to Idaho

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

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

Currently, October is the cheapest month in which you can book a flight from Denver to Idaho (average of $314). Flying from Denver to Idaho in June is currently the most expensive (average of $399). 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 DEN to ID?

Find hourly flight availability from Denver to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 21, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Denver to Idaho as you normally would.

Weekly flight availability from Denver to Idaho

Explore weekly flight availability from Denver to Idaho. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated August 21, 2025.

The most flights from DEN to USID are scheduled on a Wednesday (17 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 on average).

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 August 21, 2025.
See what other customers who have flown with Southwest, Delta, and United Airlines from Denver to Idaho have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,245 reviews

Food

7.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,245 reviews
Southwest
8.0
Very good
4,245 reviews

Food

7.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
8.0
Very good
7,981 reviews
Southwest
8.0
Very good
4,245 reviews

Food

7.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,930 reviews
Southwest
8.0
Very good
4,245 reviews

Food

7.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Allegiant Air
7.2
Good
702 reviews
Southwest
8.0
Very good
4,245 reviews

Food

7.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,207 reviews
Southwest
8.0
Very good
4,245 reviews

Food

7.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from Denver 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 Denver to Idaho?

    Located just 18.5 mi from the city center, Denver Intl (DEN) is the airport most travelers will use when flying to Idaho from Denver.

  • How popular is this Denver to Idaho flight route?

    Flights from Denver Intl to Idaho have been viewed 8 times in the past calendar month.

  • How long is the flight from Denver to Idaho?

    For as low as $189, Frontier can have you in Idaho from Denver in 1h 29m. The distance from Denver to Idaho is about 406 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most popular routes from Denver to Idaho?

    Most travelers choose Denver Intl - Boise Air Term. Gowen Fld, Denver Intl - Spokane or Denver Intl - Jackson Hole when deciding on the best route from Denver to Idaho.

  • What are the most reliable airlines from Denver to Idaho?

    Consider United Airlines (74%), Air Canada (68%) or SkyWest Airlines (67%) when booking your flight. These represent the most reliable airlines when flying from Denver to Idaho.

  • What are the cheapest flights from Denver to Idaho?

    On average you can expect to pay $150 for a flight from Denver to Idaho. The cheapest flight overall is $62 while the most popular route, (Denver Intl - Boise Air Term. Gowen Fld) is currently priced at $118.

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

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

  • How can I find direct flights from Denver to Idaho?

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

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

    Yes. Cheapflights offers flight deals from Denver 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 Denver to Idaho?

    Currently, October is the cheapest month in which you can book a flight from Denver to Idaho (average of $314). Flying from Denver to Idaho in June is currently the most expensive (average of $399). 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 Denver to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Denver to Idaho

Discover the top 6 airlines that operate flights from Denver 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 August 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$44Average$88FlexibilityNo cancel feeOn-time88%
FrontierCheapest$62Average$134FlexibilityNo cancel feeOn-time62%
DeltaCheapest$98Average$413FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$168Average$235FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$197Average$288FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$199Average$379FlexibilityNo cancel feeOn-time69%

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