$32+ Cheap flights from Colorado 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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — BOI
Jan 14 — Jan 211
1 adult, Economy
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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 Colorado to Idaho
Cheapest flights from Colorado to IdahoExplore the most affordable flight options available from Colorado to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.
Explore the most affordable flight options available from Colorado to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.
This Travelocity 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:15 amDEN - GEG
1 stop10h 38mFrontier
Sat 12/2712:02 pmGEG - DEN
Nonstop2h 42mFrontier
Deal found 12/13![Frontier logo]()
$176
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/309:36 amDEN - GEG
Nonstop2h 31mFrontier
Sun 1/44:48 pmGEG - DEN
1 stop6h 37mFrontier
Deal found 12/13![Frontier logo]()
$177
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.
Sat 12/279:52 amDEN - BOI
Nonstop2h 07mFrontier
Sat 1/312:54 pmBOI - DEN
Nonstop2h 01mFrontier
Deal found 12/14![Frontier logo]()
$195
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:15 amDEN - GEG
1 stop10h 38mFrontier
Sat 12/2712:02 pmGEG - DEN
Nonstop2h 42mFrontier
Deal found 12/13![Frontier logo]()
$201
This United Airlines deal was found by Cheapflights users on 12/15. 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.
Tue 12/308:00 amDEN - IDA
Nonstop1h 58mUnited Airlines
Sat 1/35:00 amIDA - DEN
Nonstop2h 03mUnited Airlines
Deal found 12/15![United Airlines logo]()
$219
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.
Sat 12/279:52 amDEN - BOI
Nonstop2h 07mFrontier
Thu 1/112:38 pmBOI - DEN
Nonstop2h 01mFrontier
Deal found 12/14![Frontier logo]()
$232
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.
Thu 12/186:15 amDEN - GEG
1 stop10h 38mFrontier
Sun 12/214:48 pmGEG - DEN
1 stop6h 37mFrontier
Deal found 12/13![Frontier logo]()
$238
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.
Thu 12/259:36 amDEN - BOI
Nonstop2h 07mFrontier
Sun 12/2812:38 pmBOI - DEN
Nonstop2h 01mFrontier
Deal found 12/14![Frontier logo]()
$246
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/251:30 pmDEN - IDA
Nonstop1h 54mUnited Airlines
Sun 12/285:00 amIDA - DEN
Nonstop2h 03mUnited Airlines
Deal found 12/14![United Airlines logo]()
$249
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/219:36 amDEN - GEG
Nonstop2h 31mFrontier
Sat 12/2712:02 pmGEG - DEN
Nonstop2h 42mFrontier
Deal found 12/13![Frontier logo]()
$256
This United Airlines deal was found by Cheapflights users on 12/15. 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.
Tue 12/307:00 amGJT - GEG
1 stop6h 45mUnited Airlines
Sat 1/35:05 amGEG - GJT
1 stop6h 33mUnited Airlines
Deal found 12/15![United Airlines logo]()
$265
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/207:20 pmDEN - IDA
Nonstop1h 54mUnited Airlines
Mon 1/52:30 pmIDA - DEN
Nonstop1h 51mUnited Airlines
Deal found 12/13![United Airlines logo]()
$269
Find flight deals from Colorado to Idaho
Keep the following information in mind while searching for Colorado to Idaho flight deals. Data was last updated December 15, 2025.
Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $66 (Mytrip) |
One-way from | $32 (Kiwi.com) |
Popular in | February |
Cheapest in | September |
Average price | $280 |
Good round-trip deal | $116 or less |
Good one-way deal | $113 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Colorado 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 December 15, 2025.
Use the filters below to find and compare flights from Colorado to Idaho that are best for you.
Fly from
Colorado
Fly to
Idaho
Route
Depart
Return
Price
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Mon 1/12
9:10 am-11:17 am
Nonstop2h 07m
Boise Air Term. Gowen Fld
Sun 1/18
2:01 pm-4:01 pm
Nonstop2h 00m
$66
DenverSpokane
DEN - GEG
DENGEG
Denver Intl
Thu 1/15
9:00 am-10:37 am
Nonstop2h 37m
Spokane
Sun 1/18
11:22 am-2:45 pm
Nonstop2h 23m
$134
DenverSpokane
DEN - GEG
DENGEG
Denver Intl
Thu 1/22
9:31 am-11:08 am
Nonstop2h 37m
Spokane
Sun 1/25
12:03 pm-3:26 pm
Nonstop2h 23m
$134
DenverSpokane
DEN - GEG
DENGEG
Denver Intl
Thu 1/29
9:31 am-11:08 am
Nonstop2h 37m
Spokane
Sun 2/1
8:58 pm-11:44 pm
1 stop25h 46m
$143
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Fri 1/23
9:10 am-11:12 am
Nonstop2h 02m
Boise Air Term. Gowen Fld
Sun 1/25
5:40 am-10:53 am
1 stop5h 13m
$148
DenverSpokane
DEN - GEG
DENGEG
Denver Intl
Thu 2/5
9:31 am-11:08 am
Nonstop2h 37m
Spokane
Mon 2/9
10:48 am-7:54 am
1 stop20h 06m
$148
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Fri 1/23
7:45 am-10:06 am
Nonstop2h 21m
Boise Air Term. Gowen Fld
Sun 1/25
5:16 pm-7:30 pm
Nonstop2h 14m
$177
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Thu 1/8
12:00 pm-9:20 am
2 stops21h 20m
Boise Air Term. Gowen Fld
Sun 1/11
12:07 pm-2:08 pm
Nonstop2h 01m
$184
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Sat 1/17
7:00 am-12:51 pm
1 stop5h 51m
Boise Air Term. Gowen Fld
Tue 1/20
7:55 pm-11:38 am
1 stop15h 43m
$193
DenverBoise
DEN - BOI
DENBOI
Denver Intl
Sat 12/27
9:52 am-11:59 am
Nonstop2h 07m
Boise Air Term. Gowen Fld
Sat 1/3
12:54 pm-2:55 pm
Nonstop2h 01m
$195
Showing 1-10 of 60 results
Best time to book a flight from Colorado to Idaho
Have a flexible travel schedule? Discover the best time to fly to Idaho from Colorado 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 Colorado to Idaho
What is the cheapest month to book a flight from Colorado to Idaho?
Currently, May is the cheapest month in which you can book a flight from Colorado to Idaho (average of $37). Flying from Colorado to Idaho in March 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 CO to ID?
Find hourly flight availability from Colorado 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 December 15, 2025.
It’s typically best to fly out from Colorado to Idaho in the evening. Doing so could potentially save you 33% on the flight price compared to flying in the morning, which is usually more expensive.
What is the cheapest day to fly from Colorado to Idaho?
Use this chart to determine the cheapest time to fly round-trip from Colorado to Idaho. Price data was last updated on December 8, 2024.
Travelers seeking maximum savings on their Colorado to Idaho flight should consider departing on Sunday 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 Colorado to Idaho
Explore weekly flight availability from Colorado 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 December 15, 2025.
The most flights from USCO to USID are scheduled on a Monday (16 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (3 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 December 15, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from Colorado to Idaho by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Boarding
8.1
Overall
7.9
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Overall
7.9
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Overall
7.9
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Overall
7.9
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Overall
7.9
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Overall
7.9
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Related info for your journey
Find useful and relevant information for your journey from Colorado 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 Colorado to Idaho
See prices for flight routes from nearby airports that may be better suited for you.
Top 5 airlines flying from Colorado to Idaho
Discover the top 5 airlines that operate flights from Colorado 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 December 15, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$44 | Average$88 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$59 | Average$136 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$98 | Average$317 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$177 | Average$377 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$197 | Average$342 | FlexibilityNo cancel fee | On-time63% |