$28+ 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 1/26. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — BOI
Feb 5 — Feb 121
1 adult, Economy
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Find cheap flights from Denver to Idaho 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 Denver to Idaho
Keep the following information in mind while searching for Denver to Idaho flight deals. Data was last updated January 6, 2026.
Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $66 (Frontier) |
One-way from | $28 (Kiwi.com) |
Popular in | March |
Cheapest in | September |
Average price | $191 |
Good round-trip deal | $145 or less |
Good one-way deal | $121 or less |
Find flight deals from Denver to Idaho
Cheapest flights from Denver to IdahoExplore 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 January 6, 2026.
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 January 6, 2026.
This Frontier deal was found by Cheapflights users on 1/6. 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 2/209:01 amDEN - BOI
Nonstop2h 10mFrontier
Sun 3/111:56 amBOI - DEN
Nonstop2h 00mFrontier
Deal found 1/6![Frontier logo]()
$66
This Kiwi.com deal was found by Cheapflights users on 1/6. 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 1/299:31 amDEN - GEG
Nonstop2h 37mFrontier
Thu 2/512:03 pmGEG - DEN
Nonstop2h 23mFrontier
Deal found 1/6![Frontier logo]()
$89
This Frontier deal was found by Cheapflights users on 1/5. 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 1/239:10 amDEN - BOI
Nonstop2h 02mFrontier
Mon 1/2612:07 pmBOI - DEN
Nonstop2h 00mFrontier
Deal found 1/5![Frontier logo]()
$93
This Frontier deal was found by Cheapflights users on 1/4. 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 1/1811:14 amDEN - BOI
Nonstop2h 02mFrontier
Mon 1/2612:07 pmBOI - DEN
Nonstop2h 00mFrontier
Deal found 1/4![Frontier logo]()
$98
This Frontier deal was found by Cheapflights users on 1/4. 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.
Mon 1/1911:23 amDEN - BOI
Nonstop2h 02mFrontier
Mon 1/2612:07 pmBOI - DEN
Nonstop2h 00mFrontier
Deal found 1/4![Frontier logo]()
$108
This Travelocity deal was found by Cheapflights users on 1/5. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/57:00 amDEN - BOI
1 stop5h 51mMultiple Airlines
Thu 2/1212:36 pmBOI - DEN
Nonstop2h 00mMultiple Airlines
Deal found 1/5![Multiple Airlines logo]()
$111
This Expedia deal was found by Cheapflights users on 1/6. 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.
Fri 2/209:01 amDEN - BOI
Nonstop2h 10mMultiple Airlines
Mon 2/236:00 pmBOI - DEN
1 stop5h 59mMultiple Airlines
Deal found 1/6![Multiple Airlines logo]()
$115
This Frontier deal was found by Cheapflights users on 1/4. 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 1/1811:14 amDEN - BOI
Nonstop2h 02mFrontier
Fri 1/2312:07 pmBOI - DEN
Nonstop2h 00mFrontier
Deal found 1/4![Frontier logo]()
$118
This Frontier deal was found by Cheapflights users on 1/6. 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 3/89:10 amDEN - GEG
Nonstop2h 37mFrontier
Thu 3/1211:32 amGEG - DEN
Nonstop2h 23mFrontier
Deal found 1/6![Frontier logo]()
$119
This Kiwi.com deal was found by Cheapflights users on 1/6. 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 2/199:41 amDEN - BOI
Nonstop2h 10mMultiple Airlines
Thu 2/266:00 pmBOI - DEN
1 stop5h 59mMultiple Airlines
Deal found 1/6![Multiple Airlines logo]()
$122
This Kiwi.com deal was found by Cheapflights users on 1/6. 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.
Tue 2/247:00 amDEN - BOI
1 stop8h 08mMultiple Airlines
Thu 2/2612:38 pmBOI - DEN
Nonstop2h 00mMultiple Airlines
Deal found 1/6![Multiple Airlines logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 1/6. 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.
Wed 2/257:00 amDEN - BOI
1 stop7h 58mMultiple Airlines
Fri 2/2711:56 amBOI - DEN
Nonstop2h 00mMultiple Airlines
Deal found 1/6![Multiple Airlines logo]()
$126
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 January 6, 2026.
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
Wed 2/25
7:00 am-2:58 pm
1 stop7h 58m
Boise Air Term. Gowen Fld
Thu 2/26
6:00 pm-11:59 pm
1 stop5h 59m
$163
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Tue 2/24
7:00 am-3:08 pm
1 stop8h 08m
Boise Air Term. Gowen Fld
Thu 2/26
6:00 pm-11:59 pm
1 stop5h 59m
$163
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Sat 2/21
7:40 am-11:30 pm
1 stop15h 50m
Boise Air Term. Gowen Fld
Tue 2/24
6:28 am-12:14 pm
1 stop5h 46m
$174
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Wed 2/25
7:00 am-2:58 pm
1 stop7h 58m
Boise Air Term. Gowen Fld
Fri 2/27
7:00 am-5:48 pm
1 stop10h 48m
$181
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Wed 2/25
7:00 am-2:58 pm
1 stop7h 58m
Boise Air Term. Gowen Fld
Sun 3/1
7:00 am-11:59 pm
1 stop16h 59m
$181
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Mon 2/23
7:40 am-11:30 pm
1 stop15h 50m
Boise Air Term. Gowen Fld
Tue 2/24
6:28 am-12:14 pm
1 stop5h 46m
$181
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Thu 2/19
1:10 pm-11:30 pm
1 stop10h 20m
Boise Air Term. Gowen Fld
Mon 2/23
6:00 pm-11:59 pm
1 stop5h 59m
$181
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Tue 2/24
7:00 am-3:08 pm
1 stop8h 08m
Boise Air Term. Gowen Fld
Sun 3/1
7:00 am-5:48 pm
1 stop10h 48m
$181
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Tue 2/24
7:00 am-3:08 pm
1 stop8h 08m
Boise Air Term. Gowen Fld
Fri 2/27
7:00 am-11:59 pm
1 stop16h 59m
$181
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Mon 2/23
5:30 am-9:45 am
1 stop4h 15m
Boise Air Term. Gowen Fld
Mon 2/23
5:15 pm-11:25 pm
1 stop6h 10m
$183
Showing 1-10 of 60 results
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, May is the cheapest month in which you can book a flight from Denver to Idaho (average of $37). Flying from Denver to Idaho 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 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 January 6, 2026.
A simple way to save on the total cost of your ticket is to fly from Denver to Idaho in the afternoon. If you’re flexible enough to do this you can expect to save up to 35% on your trip compared to booking a flight in the morning.
What is the cheapest day to fly from Denver to Idaho?
Use this chart to determine the cheapest time to fly round-trip from Denver to Idaho. Price data was last updated on January 3, 2026.
Travelers seeking maximum savings on their Denver to Idaho flight should consider departing on Thursday afternoons when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
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 January 6, 2026.
The most flights from DEN to USID are scheduled on a Tuesday (16 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (9 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 January 6, 2026.
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.
Food
7.0
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
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.
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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.
Top 5 airlines flying from Denver to Idaho
Discover the top 5 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 January 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$44 | Average$88 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$59 | Average$135 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$98 | Average$321 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$177 | Average$365 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$197 | Average$284 | FlexibilityNo cancel fee | On-time63% |