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Denver

$32+ Cheap flights from Idaho to Denver (DEN)

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 2/26. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — DEN
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap flight deals from Idaho to Denver

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

This Frontier deal was found by Cheapflights users on 12/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2312:02 pmGEG - DEN
Nonstop2h 42mFrontier
Thu 1/16:15 amDEN - GEG
1 stop10h 38mFrontier
Deal found 12/13$176
This Frontier deal was found by Cheapflights users on 12/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2312:02 pmGEG - DEN
Nonstop2h 42mFrontier
Sat 12/279:36 amDEN - GEG
Nonstop2h 31mFrontier
Deal found 12/13$188
This Frontier deal was found by Cheapflights users on 12/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/214:48 pmGEG - DEN
1 stop6h 37mFrontier
Sat 12/279:36 amDEN - GEG
Nonstop2h 31mFrontier
Deal found 12/12$200
This United Airlines deal was found by Cheapflights users on 12/12. 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.
Mon 12/295:00 amIDA - DEN
Nonstop2h 03mUnited Airlines
Fri 1/29:05 pmDEN - IDA
Nonstop1h 54mUnited Airlines
Deal found 12/12$204
This Frontier deal was found by Cheapflights users on 12/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/214:48 pmGEG - DEN
1 stop6h 37mFrontier
Thu 12/256:15 amDEN - GEG
1 stop10h 38mFrontier
Deal found 12/13$212
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Fri 12/2610:45 amIDA - DEN
Nonstop1h 56mUnited Airlines
Sun 12/288:00 amDEN - IDA
Nonstop1h 58mUnited Airlines
Deal found 12/11$235
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2012:02 pmGEG - DEN
Nonstop2h 42mFrontier
Tue 12/236:15 amDEN - GEG
1 stop10h 38mFrontier
Deal found 12/14$237
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2812:38 pmBOI - DEN
Nonstop2h 01mFrontier
Thu 1/19:36 amDEN - BOI
Nonstop2h 07mFrontier
Deal found 12/14$242
This Frontier deal was found by Cheapflights users on 12/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2112:38 pmBOI - DEN
Nonstop2h 01mFrontier
Sun 1/49:36 amDEN - BOI
Nonstop2h 07mFrontier
Deal found 12/12$243
This Frontier deal was found by Cheapflights users on 12/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2012:02 pmGEG - DEN
Nonstop2h 42mFrontier
Sat 12/279:36 amDEN - GEG
Nonstop2h 31mFrontier
Deal found 12/12$243
This Frontier deal was found by Cheapflights users on 12/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2012:02 pmGEG - DEN
Nonstop2h 42mFrontier
Tue 12/309:36 amDEN - GEG
Nonstop2h 31mFrontier
Deal found 12/12$244
This Frontier deal was found by Cheapflights users on 12/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2512:38 pmBOI - DEN
Nonstop2h 01mFrontier
Thu 1/19:36 amDEN - BOI
Nonstop2h 07mFrontier
Deal found 12/12$246

Find flight deals from Idaho to Denver

Keep the following information in mind while searching for Idaho to Denver flight deals. Data was last updated December 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$117
(Kiwi.com)

One-way from

$32
(Kiwi.com)

Popular in

March

Cheapest in

October

Average price

$302

Good round-trip deal

$316 or less

Good one-way deal

$124 or less
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Denver Intl flights.
Search Deals
From Idaho to Denver Intl
Search Deals
One-way flight from Idaho to Denver Intl
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Idaho to Denver Intl.
Search Deals
Price to beat on a one-way flight from Idaho to Denver Intl.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho to Denver 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 Idaho to Denver that are best for you.

Fly from

Idaho

Fly to

Denver

Route

Depart

Return

Price

SpokaneDenver

GEG - DEN

GEGDEN

Spokane

Tue 1/6

4:49 pm-11:59 pm

1 stop6h 10m

Denver Intl

Thu 1/8

10:53 am-12:24 pm

Nonstop2h 31m

$173

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Wed 1/21

9:02 am-11:35 pm

1 stop14h 33m

Denver Intl

Fri 1/23

7:00 am-12:51 pm

1 stop5h 51m

$176

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Fri 1/16

2:37 pm-4:36 pm

Nonstop1h 59m

Denver Intl

Sun 1/18

11:30 am-1:35 pm

Nonstop2h 05m

$177

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Thu 1/22

11:20 am-1:10 pm

Nonstop1h 50m

Denver Intl

Sun 1/25

8:15 am-10:20 am

Nonstop2h 05m

$177

SpokaneDenver

GEG - DEN

GEGDEN

Spokane

Thu 1/8

4:14 pm-11:19 pm

1 stop6h 05m

Denver Intl

Thu 1/15

9:50 am-6:21 pm

1 stop9h 31m

$184

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Fri 1/9

5:40 am-12:27 pm

1 stop6h 47m

Denver Intl

Mon 1/12

6:29 am-1:00 pm

1 stop6h 31m

$185

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Fri 1/23

4:19 pm-6:13 pm

Nonstop1h 54m

Denver Intl

Sun 1/25

1:39 pm-3:31 pm

Nonstop1h 52m

$189

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Fri 1/16

4:19 pm-6:13 pm

Nonstop1h 54m

Denver Intl

Mon 1/19

1:39 pm-3:31 pm

Nonstop1h 52m

$189

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Thu 1/15

2:40 pm-4:31 pm

Nonstop1h 51m

Denver Intl

Tue 1/20

11:45 am-1:30 pm

Nonstop1h 45m

$189

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Fri 1/16

4:19 pm-6:13 pm

Nonstop1h 54m

Denver Intl

Sun 1/18

8:00 am-9:56 am

Nonstop1h 56m

$189

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

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

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

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

Currently, September is the cheapest month in which you can book a flight from Idaho to Denver (average of $58). Flying from Idaho to Denver in April is currently the most expensive (average of $197). 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 ID to DEN?

Find hourly flight availability from Idaho to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 15, 2025.

When flying from Idaho to Denver, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 36% versus a flight at noon.

Weekly flight availability from Idaho to Denver

Explore weekly flight availability from Idaho to Denver. 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 December 15, 2025.

The most flights from USID to DEN are scheduled on a Sunday (16 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (3 on average).

Related info for your journey

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

    Most people fly into Denver Intl (DEN) if they book a flight to Denver from Idaho. Denver Intl is conveniently located just 18.5 mi from Denver’s city center.

  • How popular is this Idaho to Denver flight route?

    This flight path from Idaho to Denver Intl was viewed by 100 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Idaho to Denver?

    Departing from Idaho to Denver will take you 1h 50m. Idaho and Denver are separated by a distance of 647 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    The cheapest airlines for a one-way flight from Idaho to Denver are Frontier ($40), Allegiant Air ($42), and United Airlines ($98).

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

    While some choose either Spokane - Denver Intl or Jackson Hole - Denver Intl, Boise Air Term. Gowen Fld - Denver Intl is the most popular route from Idaho to Denver.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Idaho to Denver on time: Frontier (91%), SkyWest Airlines (89%), United Airlines (89%).

  • What are the cheapest flights from Idaho to Denver?

    The cheapest flight price from Idaho to Denver is $81. On average you can expect to pay $673. The most popular route, (Boise Air Term. Gowen Fld - Denver Intl), can usually be booked for $121.

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

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

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

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

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

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

    Currently, September is the cheapest month in which you can book a flight from Idaho to Denver (average of $58). Flying from Idaho to Denver in April is currently the most expensive (average of $197). 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

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Black Hawk
Thornton
Broomfield
Westminster
Winter Park
Golden
Greeley
Lone Tree
Lakewood
Cripple Creek
Silverthorne
Central City
Frisco
Wheat Ridge
Manitou Springs
Fort Morgan
Brighton
Longmont
Idaho Springs
Evergreen

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Top 6 airlines flying from Idaho to Denver

Discover the top 6 airlines that operate flights from Idaho to Denver. 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
Allegiant AirCheapest$54Average$88FlexibilityNo cancel feeOn-time88%
FrontierCheapest$58Average$147FlexibilityNo cancel feeOn-time62%
DeltaCheapest$136Average$340FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$154Average$428FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$179Average$320FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$192Average$283FlexibilityNo cancel feeOn-time63%

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