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Idaho

$26+ 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 12/20. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — BOI
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap flight deals from Colorado to Idaho

Keep the following information in mind while searching for Colorado to Idaho flight deals. Data was last updated October 30, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$125
(Kiwi.com)

One-way from

$26
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$256

Good round-trip deal

$177 or less

Good one-way deal

$125 or less
Provider with most accurate pricing for Denver Intl-Boise Air Term. Gowen Fld flight deals.
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Provider most trusted by Cheapflights users for Denver Intl-Boise Air Term. Gowen Fld flights.
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From Colorado to Idaho
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One-way flight from Colorado to Idaho
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Highest demand for flights based on searches. 21% potential increase in price ($74 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Colorado to Idaho.
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Price to beat on a one-way flight from Colorado to Idaho.
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Find flight deals from Colorado to Idaho

Cheapest flights from Colorado to Idaho
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 October 30, 2025.

This Frontier deal was found by Cheapflights users on 10/28. 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 12/46:00 amDEN - GEG
1 stop11h 06mFrontier
Sun 12/712:08 pmGEG - DEN
Nonstop2h 42mFrontier
Deal found 10/28$116
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/119:42 amDEN - BOI
Nonstop2h 07mMultiple Airlines
Tue 12/166:03 amBOI - DEN
1 stop5h 41mMultiple Airlines
Deal found 10/28$125
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/59:42 amDEN - BOI
Nonstop2h 07mMultiple Airlines
Fri 12/510:41 pmBOI - DEN
1 stop10h 23mMultiple Airlines
Deal found 10/28$126
This CheapOair deal was found by Cheapflights users on 10/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/245:55 pmDEN - BOI
Nonstop2h 04mFrontier
Fri 11/2812:48 pmBOI - DEN
Nonstop2h 04mFrontier
Deal found 10/28$138
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 12/149:42 amDEN - GEG
Nonstop2h 31mFrontier
Sat 1/312:02 pmGEG - DEN
Nonstop2h 42mFrontier
Deal found 10/27$140
This Expedia deal was found by Cheapflights users on 10/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/49:42 amDEN - BOI
Nonstop2h 07mMultiple Airlines
Sat 12/67:25 amBOI - DEN
2 stops10h 38mMultiple Airlines
Deal found 10/28$141
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 12/49:42 amDEN - BOI
Nonstop2h 07mMultiple Airlines
Fri 12/510:41 pmBOI - DEN
2 stops19h 27mMultiple Airlines
Deal found 10/29$148
This Expedia deal was found by Cheapflights users on 10/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1112:41 pmDEN - BOI
1 stop11h 14mMultiple Airlines
Thu 12/1812:38 pmBOI - DEN
Nonstop2h 01mMultiple Airlines
Deal found 10/28$155
This Travelocity deal was found by Cheapflights users on 10/29. 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 12/912:40 pmDEN - GEG
1 stop7h 25mMultiple Airlines
Sun 12/1412:08 pmGEG - DEN
Nonstop2h 42mMultiple Airlines
Deal found 10/29$155
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/219:49 amDEN - BOI
Nonstop2h 04mFrontier
Sun 11/2312:48 pmBOI - DEN
Nonstop2h 04mFrontier
Deal found 10/28$157
This Kiwi.com deal was found by Cheapflights users on 10/30. 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 12/309:36 amDEN - GEG
Nonstop2h 31mFrontier
Sat 1/312:02 pmGEG - DEN
Nonstop2h 42mFrontier
Deal found 10/30$159
This Frontier deal was found by Cheapflights users on 10/28. 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.
Sat 12/279:52 amDEN - BOI
Nonstop2h 07mFrontier
Thu 1/112:38 pmBOI - DEN
Nonstop2h 01mFrontier
Deal found 10/28$163

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 October 30, 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

Thu 12/4

8:20 am-11:55 pm

1 stop15h 35m

Boise Air Term. Gowen Fld

Tue 12/9

12:19 pm-6:03 pm

1 stop5h 44m

$176

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Fri 1/23

7:46 pm-9:52 pm

Nonstop2h 06m

Boise Air Term. Gowen Fld

Sun 1/25

2:37 pm-4:36 pm

Nonstop1h 59m

$177

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Fri 1/16

5:09 pm-11:59 pm

1 stop6h 50m

Boise Air Term. Gowen Fld

Sun 1/18

12:54 pm-2:54 pm

Nonstop2h 00m

$180

Grand JunctionSpokane

GJT - GEG

GJTGEG

Grand Junction Regnl

Fri 12/5

5:50 am-9:10 am

1 stop4h 20m

Spokane

Tue 12/9

4:35 pm-10:47 pm

1 stop5h 12m

$189

Grand JunctionSpokane

GJT - GEG

GJTGEG

Grand Junction Regnl

Fri 12/19

5:50 am-9:10 am

1 stop4h 20m

Spokane

Mon 12/22

4:53 pm-10:47 pm

1 stop4h 54m

$189

Grand JunctionBoise

GJT - BOI

GJTBOI

Grand Junction Regnl

Tue 12/9

5:50 am-10:15 am

1 stop4h 25m

Boise Air Term. Gowen Fld

Sat 12/13

5:58 pm-10:47 pm

1 stop4h 49m

$189

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Thu 12/11

12:41 pm-11:55 pm

1 stop11h 14m

Boise Air Term. Gowen Fld

Tue 12/16

7:25 am-6:03 pm

2 stops10h 38m

$191

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Thu 11/27

11:34 am-5:05 pm

1 stop5h 31m

Boise Air Term. Gowen Fld

Thu 12/4

12:44 pm-2:45 pm

Nonstop2h 01m

$196

DenverSpokane

DEN - GEG

DENGEG

Denver Intl

Sat 12/6

12:40 pm-11:14 pm

1 stop11h 34m

Spokane

Sun 12/7

5:51 am-11:44 am

1 stop4h 53m

$197

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Thu 12/4

7:05 am-12:02 pm

1 stop4h 57m

Boise Air Term. Gowen Fld

Sun 12/7

5:20 am-11:32 am

1 stop6h 12m

$197

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 60 results
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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 January is currently the most expensive (average of $216). 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 October 30, 2025.

It’s typically best to fly out from Colorado to Idaho in the evening. Doing so could potentially save you 31% 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 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.

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 October 30, 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.
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,243 reviews
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
7.9
Good
7,998 reviews
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,999 reviews
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Allegiant Air
7.2
Good
694 reviews
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,123 reviews
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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.

  • How popular is this Colorado to Idaho flight route?

    This flight path from Colorado to Idaho was viewed by 9 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 Colorado to Idaho?

    Airlines like Alaska Airlines, United Airlines, and Delta fly from Colorado to Idaho in about 2h 06m. The time it takes to get you to your destination can typically vary by up to 13h 29m. Airlines will cover a distance of 647 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Colorado to Idaho 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 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 January is currently the most expensive (average of $216). 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

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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.
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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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$44Average$88FlexibilityNo cancel feeOn-time88%
FrontierCheapest$59Average$139FlexibilityNo cancel feeOn-time62%
DeltaCheapest$98Average$401FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$194Average$395FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$197Average$369FlexibilityNo cancel feeOn-time63%

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