HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Denver

$26+ 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 9/28. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — DEN
Aug 27 — Sep 31
Wed 8/27
Wed 9/3
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Idaho to Denver with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Idaho to Denver

Keep the following information in mind while searching for Idaho to Denver flight deals. Data was last updated August 22, 2025.

Round-trip from

$79
(Priceline)

One-way from

$26
(Priceline)

Popular in

March

Cheapest in

August

Average price

$253

Good round-trip deal

$289 or less

Good one-way deal

$202 or less
From Idaho to Denver Intl
Search Deals
One-way flight from Idaho to Denver Intl
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($12 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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.
Search Deals

Find 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 August 22, 2025.

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 9/1912:22 pmBOI - DEN
Nonstop2h 23mFrontier
Fri 9/269:38 amDEN - BOI
Nonstop1h 59mFrontier
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 9/2512:22 pmBOI - DEN
Nonstop2h 23mFrontier
Sun 9/289:38 amDEN - BOI
Nonstop1h 59mFrontier
Deal found 8/21$80
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 9/1112:22 pmBOI - DEN
Nonstop2h 23mFrontier
Sun 9/149:38 amDEN - BOI
Nonstop1h 59mFrontier
Deal found 8/21$87
This Frontier deal was found by Cheapflights users on 8/22. 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 9/412:22 pmBOI - DEN
Nonstop2h 23mFrontier
Sun 9/79:38 amDEN - BOI
Nonstop1h 59mFrontier
Deal found 8/22$90
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 9/1412:22 pmBOI - DEN
Nonstop2h 23mFrontier
Thu 9/189:38 amDEN - BOI
Nonstop1h 59mFrontier
Deal found 8/21$103
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 8/2912:33 pmBOI - DEN
Nonstop2h 15mFrontier
Sun 8/319:36 amDEN - BOI
Nonstop2h 02mFrontier
Deal found 8/21$114
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 8/2811:52 amGEG - DEN
Nonstop2h 28mFrontier
Sun 8/319:46 amDEN - GEG
Nonstop2h 21mFrontier
Deal found 8/20$117
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 10/1012:28 pmBOI - DEN
Nonstop2h 00mFrontier
Sun 10/129:48 amDEN - BOI
Nonstop1h 55mFrontier
Deal found 8/21$119
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 9/1811:53 amGEG - DEN
Nonstop2h 19mFrontier
Sun 9/219:38 amDEN - GEG
Nonstop2h 20mFrontier
Deal found 8/21$119
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2612:28 pmBOI - DEN
Nonstop2h 00mMultiple Airlines
Wed 10/293:37 pmDEN - BOI
1 stop6h 43mMultiple Airlines
Deal found 8/21$121
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.
Fri 9/511:53 amGEG - DEN
Nonstop2h 19mFrontier
Sun 9/79:38 amDEN - GEG
Nonstop2h 20mFrontier
Deal found 8/20$122
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1111:53 amGEG - DEN
Nonstop2h 19mFrontier
Sun 9/149:38 amDEN - GEG
Nonstop2h 20mFrontier
Deal found 8/20$127

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 August 22, 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

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Fri 9/19

12:22 pm-2:45 pm

Nonstop2h 23m

Denver Intl

Fri 9/26

9:38 am-11:37 am

Nonstop1h 59m

$79

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Thu 10/9

12:28 pm-2:28 pm

Nonstop2h 00m

Denver Intl

Sun 10/12

9:48 am-11:43 am

Nonstop1h 55m

$80

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Thu 9/25

12:22 pm-2:45 pm

Nonstop2h 23m

Denver Intl

Sun 9/28

9:38 am-11:37 am

Nonstop1h 59m

$80

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Thu 9/11

12:22 pm-2:45 pm

Nonstop2h 23m

Denver Intl

Sun 9/14

9:38 am-11:37 am

Nonstop1h 59m

$87

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Thu 9/4

12:22 pm-2:45 pm

Nonstop2h 23m

Denver Intl

Sun 9/7

9:38 am-11:37 am

Nonstop1h 59m

$90

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Sun 9/14

12:22 pm-2:45 pm

Nonstop2h 23m

Denver Intl

Thu 9/18

9:38 am-11:37 am

Nonstop1h 59m

$103

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Fri 9/26

12:22 pm-2:45 pm

Nonstop2h 23m

Denver Intl

Sun 9/28

9:38 am-11:37 am

Nonstop1h 59m

$107

SpokaneDenver

GEG - DEN

GEGDEN

Spokane

Thu 9/18

11:53 am-3:12 pm

Nonstop2h 19m

Denver Intl

Sun 9/21

9:38 am-10:58 am

Nonstop2h 20m

$119

SpokaneDenver

GEG - DEN

GEGDEN

Spokane

Thu 10/23

12:03 pm-3:19 pm

Nonstop2h 16m

Denver Intl

Sun 10/26

9:48 am-11:08 am

Nonstop2h 20m

$122

SpokaneDenver

GEG - DEN

GEGDEN

Spokane

Fri 9/26

11:53 am-3:12 pm

Nonstop2h 19m

Denver Intl

Sun 9/28

9:38 am-10:58 am

Nonstop2h 20m

$122

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/21

Showing 1-10 of 60 results
1
2
3
...
6

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, October is the cheapest month in which you can book a flight from Idaho to Denver (average of $197). Flying from Idaho to Denver in March is currently the most expensive (average of $278). 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 August 22, 2025.

When flying from Idaho to Denver, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 August 22, 2025.

The most flights from USID to DEN are scheduled on a Thursday (18 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 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 106 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 36m. Idaho and Denver are separated by a distance of 406 mi. Most flights are nonstop.

  • 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 ($43), Allegiant Air ($48), and Alaska Airlines ($114).

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

    While some choose either Boise Air Term. Gowen Fld - Denver Intl or Jackson Hole - 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: SkyWest Airlines (97%), United Airlines (84%), Air Canada (74%).

  • What are the cheapest flights from Idaho to Denver?

    The cheapest flight price from Idaho to Denver is $99. On average you can expect to pay $806. The most popular route, (Spokane - Denver Intl), can usually be booked for $143.

  • 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, October is the cheapest month in which you can book a flight from Idaho to Denver (average of $197). Flying from Idaho to Denver in March is currently the most expensive (average of $278). 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
Westminster
Black Hawk
Golden
Winter Park
Greeley
Lone Tree
Lakewood
Cripple Creek
Thornton
Broomfield
Silverthorne
Frisco
Manitou Springs
Grand Lake
Fort Morgan
Glendale
Wheat Ridge
Brighton
Longmont
Idaho Springs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Idaho to Denver

See prices for flight routes from nearby airports that may be better suited for you.
Dallas/Fort Worth to Denver flights
John F Kennedy Intl to Denver flights
O'Hare Intl to Denver flights
Newark to Denver flights
LaGuardia to Denver flights
Seattle to Denver flights
Philadelphia to Denver flights
Baltimore to Denver flights
Hobby to Denver flights
Los Angeles to Denver flights
Boston to Denver flights
Atlanta to Denver flights
Minneapolis to Denver flights
George Bush Intcntl to Denver flights
Reagan-National to Denver flights
Ontario to Denver flights
San Francisco to Denver flights
Dulles Intl to Denver flights
Cincinnati to Denver flights
Austin to Denver flights
Raleigh to Denver flights
Orlando to Denver flights
Charlotte to Denver flights
Sky Harbor Intl to Denver flights
Miami to Denver flights
Fort Lauderdale to Denver flights
Detroit to Denver flights
Tampa to Denver flights
Santa Ana to Denver flights
Kansas City to Denver flights
Indianapolis to Denver flights
Cleveland to Denver flights
Love Field to Denver flights
San Diego to Denver flights
San Jose to Denver flights
Portland to Denver flights
Grand Rapids to Denver flights
Milwaukee to Denver flights
Las Vegas to Denver flights
Midway to Denver flights
Hartford to Denver flights
St. Louis to Denver flights
Nashville to Denver flights
Syracuse to Denver flights
Greenville to Denver flights
Sacramento to Denver flights
Tucson to Denver flights
Madison to Denver flights
Des Moines to Denver flights
Pittsburgh to Denver flights

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 August 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$54Average$88FlexibilityNo cancel feeOn-time88%
FrontierCheapest$66Average$138FlexibilityNo cancel feeOn-time62%
DeltaCheapest$136Average$378FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$154Average$407FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$189Average$327FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$197Average$282FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.