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Denver

$28+ 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 2/19. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — DEN
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 January 29, 2026.

This Expedia deal was found by Cheapflights users on 1/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1912:36 pm
BOI
-
DEN
Nonstop2h 00m
Frontier
Sun 2/229:01 am
DEN
-
BOI
Nonstop2h 10m
Frontier
Deal found 1/26$58
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
Thu 2/2612:38 pm
BOI
-
DEN
Nonstop2h 00m
Frontier
Sun 3/19:01 am
DEN
-
BOI
Nonstop2h 10m
Frontier
Deal found 1/27$65
This Frontier deal was found by Cheapflights users on 1/27. 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.
Fri 2/2711:56 am
BOI
-
DEN
Nonstop2h 00m
Frontier
Sun 3/89:10 am
DEN
-
BOI
Nonstop2h 10m
Frontier
Deal found 1/27$66
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
Thu 2/2612:38 pm
BOI
-
DEN
Nonstop2h 00m
Frontier
Thu 3/59:41 am
DEN
-
BOI
Nonstop2h 10m
Frontier
Deal found 1/27$74
This CheapOair deal was found by Cheapflights users on 1/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/1311:56 am
BOI
-
DEN
Nonstop2h 00m
Frontier
Sun 2/159:01 am
DEN
-
BOI
Nonstop2h 10m
Frontier
Deal found 1/27$80
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
Sun 2/2211:56 am
BOI
-
DEN
Nonstop2h 00m
Frontier
Thu 2/269:41 am
DEN
-
BOI
Nonstop2h 10m
Frontier
Deal found 1/27$86
This Frontier deal was found by Cheapflights users on 1/27. 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 2/1912:36 pm
BOI
-
DEN
Nonstop2h 00m
Frontier
Fri 2/279:01 am
DEN
-
BOI
Nonstop2h 10m
Frontier
Deal found 1/27$87
This Frontier deal was found by Cheapflights users on 1/28. 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 2/1912:36 pm
BOI
-
DEN
Nonstop2h 00m
Frontier
Sun 3/19:01 am
DEN
-
BOI
Nonstop2h 10m
Frontier
Deal found 1/28$88
This Kiwi.com deal was found by Cheapflights users on 1/26. 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.
Thu 2/1912:36 pm
BOI
-
DEN
Nonstop2h 00m
Frontier
Sun 3/229:10 am
DEN
-
BOI
Nonstop2h 10m
Frontier
Deal found 1/26$92
This Frontier deal was found by Cheapflights users on 1/27. 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.
Fri 2/1311:56 am
BOI
-
DEN
Nonstop2h 00m
Frontier
Fri 2/209:01 am
DEN
-
BOI
Nonstop2h 10m
Frontier
Deal found 1/27$94
This Frontier deal was found by Cheapflights users on 1/28. 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 2/1912:36 pm
BOI
-
DEN
Nonstop2h 00m
Frontier
Thu 3/59:41 am
DEN
-
BOI
Nonstop2h 10m
Frontier
Deal found 1/28$95
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
Thu 2/1912:22 pm
GEG
-
DEN
Nonstop2h 23m
Frontier
Thu 3/59:50 am
DEN
-
GEG
Nonstop2h 37m
Frontier
Deal found 1/27$119

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$58
(Expedia)

One-way from

$28
(Kiwi.com)

Popular in

March

Cheapest in

October

Average price

$279

Good round-trip deal

$302 or less

Good one-way deal

$166 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 ($29 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 January 2026
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.
Search Deals

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 January 29, 2026.
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

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Thu 5/14

11:53 am-1:56 pm

Nonstop2h 03m

Denver Intl

Sun 5/17

9:10 am-11:08 am

Nonstop1h 58m

$150

SpokaneDenver

GEG - DEN

GEGDEN

Spokane

Thu 3/5

12:22 pm-3:45 pm

Nonstop2h 23m

Denver Intl

Tue 3/10

7:00 am-11:06 am

1 stop5h 06m

$153

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Thu 2/26

5:20 pm-7:10 pm

Nonstop1h 50m

Denver Intl

Sun 3/1

8:05 am-10:10 am

Nonstop2h 05m

$177

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Tue 2/24

6:28 am-12:14 pm

1 stop5h 46m

Denver Intl

Wed 3/4

7:00 am-2:58 pm

1 stop7h 58m

$177

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Fri 3/27

2:35 pm-4:25 pm

Nonstop1h 50m

Denver Intl

Sun 3/29

11:44 am-1:24 pm

Nonstop1h 40m

$189

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Fri 5/29

6:03 pm-7:56 pm

Nonstop1h 53m

Denver Intl

Mon 6/1

11:45 am-1:24 pm

Nonstop1h 39m

$189

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Sun 3/1

5:35 am-9:24 am

1 stop3h 49m

Denver Intl

Thu 3/5

6:40 am-1:11 pm

1 stop6h 31m

$197

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Tue 2/17

5:40 am-10:42 am

1 stop5h 02m

Denver Intl

Wed 2/25

7:00 am-2:58 pm

1 stop7h 58m

$197

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Thu 3/5

5:50 am-12:15 pm

1 stop6h 25m

Denver Intl

Sun 3/8

6:30 am-1:05 pm

1 stop6h 35m

$197

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Wed 3/4

5:40 am-10:42 am

1 stop5h 02m

Denver Intl

Tue 3/10

7:00 am-3:08 pm

1 stop8h 08m

$197

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

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, December is the cheapest month in which you can book a flight from Idaho to Denver (average of $57). Flying from Idaho to Denver in April is currently the most expensive (average of $189). 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 January 29, 2026.

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 46% versus a flight in the morning.

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 January 29, 2026.

The most flights from USID to DEN are scheduled on a Monday (15 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (11 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 ($38), Allegiant Air ($42), and United Airlines ($94).

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

    While some choose either Boise Air Term. Gowen Fld - Denver Intl or Idaho Falls Fanning Field - Denver Intl, Spokane - 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 (98%), Southwest (92%), United Airlines (84%).

  • What are the cheapest flights from Idaho to Denver?

    The cheapest flight price from Idaho to Denver is $96. On average you can expect to pay $742. The most popular route, (Spokane - Denver Intl), can usually be booked for $153.

  • 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, December is the cheapest month in which you can book a flight from Idaho to Denver (average of $57). Flying from Idaho to Denver in April is currently the most expensive (average of $189). 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
Thornton
Black Hawk
Lakewood
Broomfield
Westminster
Golden
Centennial
Greeley
Lone Tree
Wheat Ridge
Silverthorne
Cripple Creek
Winter Park
Central City
Glendale
Manitou Springs
Frisco
Fort Morgan
Brighton
Evergreen

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Idaho to Denver

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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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$43Average$84FlexibilityNo cancel feeOn-time88%
FrontierCheapest$54Average$126FlexibilityNo cancel feeOn-time62%
DeltaCheapest$128Average$331FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$154Average$428FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$160Average$317FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$189Average$283FlexibilityNo cancel feeOn-time63%

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