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$32+ Cheap flights from Idaho to Colorado

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 2/22. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — DEN
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap flight deals from Idaho to Colorado

Cheapest flights from Idaho to Colorado
Explore the most affordable flight options available from Idaho to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

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.
Tue 12/2312:02 pmGEG - DEN
Nonstop2h 42mFrontier
Thu 1/16:15 amDEN - GEG
1 stop10h 38mFrontier
Deal found 12/14$176
This Frontier deal was found by Cheapflights users on 12/12. 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.
Tue 12/2312:02 pmGEG - DEN
Nonstop2h 42mFrontier
Sat 12/279:36 amDEN - GEG
Nonstop2h 31mFrontier
Deal found 12/12$188
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.
Tue 12/2312:02 pmGEG - DEN
Nonstop2h 42mFrontier
Tue 12/309:36 amDEN - GEG
Nonstop2h 31mFrontier
Deal found 12/14$189
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.
Sun 12/214:48 pmGEG - DEN
1 stop6h 37mFrontier
Tue 12/309:36 amDEN - GEG
Nonstop2h 31mFrontier
Deal found 12/14$201
This United Airlines deal was found by Cheapflights users on 12/12. 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.
Mon 12/295:00 amIDA - DEN
Nonstop2h 03mUnited Airlines
Fri 1/29:05 pmDEN - IDA
Nonstop1h 54mUnited Airlines
Deal found 12/12$204
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.
Sun 12/214:48 pmGEG - DEN
1 stop6h 37mFrontier
Thu 12/256:15 amDEN - GEG
1 stop10h 38mFrontier
Deal found 12/13$212
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/184:48 pmGEG - DEN
1 stop6h 37mFrontier
Tue 12/236:15 amDEN - GEG
1 stop10h 38mFrontier
Deal found 12/15$213
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.
Tue 12/2312:02 pmGEG - DEN
Nonstop2h 42mFrontier
Sun 12/289:36 amDEN - GEG
Nonstop2h 31mFrontier
Deal found 12/14$218
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 12/2712:02 pmGEG - DEN
Nonstop2h 42mFrontier
Tue 12/306:15 amDEN - GEG
1 stop10h 38mFrontier
Deal found 12/14$227
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.
Sun 12/214:48 pmGEG - DEN
1 stop6h 37mFrontier
Sun 12/289:36 amDEN - GEG
Nonstop2h 31mFrontier
Deal found 12/14$230
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2012:02 pmGEG - DEN
Nonstop2h 42mFrontier
Tue 12/236:15 amDEN - GEG
1 stop10h 38mFrontier
Deal found 12/14$237
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.
Sun 12/2812:38 pmBOI - DEN
Nonstop2h 01mFrontier
Thu 1/19:36 amDEN - BOI
Nonstop2h 07mFrontier
Deal found 12/14$242

Find flight deals from Idaho to Colorado

Keep the following information in mind while searching for Idaho to Colorado flight deals. Data was last updated December 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$117
(Kiwi.com)

One-way from

$32
(Kiwi.com)

Popular in

March

Cheapest in

October

Average price

$302

Good round-trip deal

$316 or less

Good one-way deal

$124 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 Colorado
Search Deals
One-way flight from Idaho to Colorado
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($32 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 December 2025
Search Deals
Price to beat on a round-trip flight from Idaho to Colorado.
Search Deals
Price to beat on a one-way flight from Idaho to Colorado.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho to Colorado 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 Idaho to Colorado that are best for you.

Fly from

Idaho

Fly to

Colorado

Route

Depart

Return

Price

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Mon 1/12

10:10 am-10:42 am

1 stop24h 32m

Denver Intl

Mon 1/19

11:23 am-1:25 pm

Nonstop2h 02m

$133

SpokaneDenver

GEG - DEN

GEGDEN

Spokane

Thu 1/29

12:03 pm-3:26 pm

Nonstop2h 23m

Denver Intl

Fri 2/6

7:00 am-11:12 am

1 stop5h 12m

$162

SpokaneDenver

GEG - DEN

GEGDEN

Spokane

Thu 1/8

1:19 pm-5:01 pm

Nonstop2h 42m

Denver Intl

Thu 1/8

10:29 pm-9:58 am

1 stop12h 29m

$167

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Wed 1/21

9:02 am-11:35 pm

1 stop14h 33m

Denver Intl

Fri 1/23

7:00 am-12:51 pm

1 stop5h 51m

$176

SpokaneDenver

GEG - DEN

GEGDEN

Spokane

Tue 12/23

12:02 pm-3:44 pm

Nonstop2h 42m

Denver Intl

Thu 1/1

6:15 am-3:53 pm

1 stop10h 38m

$176

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Fri 2/13

5:20 pm-7:10 pm

Nonstop1h 50m

Denver Intl

Mon 2/16

8:05 am-10:10 am

Nonstop2h 05m

$177

BoiseDenver

BOI - DEN

BOIDEN

Boise Air Term. Gowen Fld

Fri 1/16

2:37 pm-4:36 pm

Nonstop1h 59m

Denver Intl

Sun 1/18

11:30 am-1:35 pm

Nonstop2h 05m

$177

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Fri 1/23

4:19 pm-6:13 pm

Nonstop1h 54m

Denver Intl

Sun 1/25

1:39 pm-3:31 pm

Nonstop1h 52m

$189

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Fri 1/16

4:19 pm-6:13 pm

Nonstop1h 54m

Denver Intl

Mon 1/19

1:39 pm-3:31 pm

Nonstop1h 52m

$189

Idaho FallsDenver

IDA - DEN

IDADEN

Idaho Falls Fanning Field

Thu 2/19

2:40 pm-4:29 pm

Nonstop1h 49m

Denver Intl

Sun 2/22

8:00 am-9:48 am

Nonstop1h 48m

$189

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 60 results
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Best time to book a flight from Idaho to Colorado

Have a flexible travel schedule? Discover the best time to fly to Colorado 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 Colorado

What is the cheapest month to book a flight from Idaho to Colorado?

Currently, September is the cheapest month in which you can book a flight from Idaho to Colorado (average of $58). Flying from Idaho to Colorado 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 ID to CO?

Find hourly flight availability from Idaho to Colorado. 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.

When flying from Idaho to Colorado, 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 40% versus a flight in the morning.

Weekly flight availability from Idaho to Colorado

Explore weekly flight availability from Idaho to Colorado. 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 USID to USCO are scheduled on a Sunday (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 Colorado

Get insights into the airlines that provide service to Colorado. 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 Colorado. Reviews last updated December 15, 2025.
See what other customers who have flown with Southwest, Delta, and United Airlines from Idaho to Colorado have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,250 reviews

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

7.9

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
7.9
Good
4,250 reviews
Southwest
7.9
Good
4,250 reviews

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

7.9

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Delta
7.9
Good
8,010 reviews
Southwest
7.9
Good
4,250 reviews

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

7.9

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,094 reviews
Southwest
7.9
Good
4,250 reviews

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

7.9

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Allegiant Air
7.2
Good
700 reviews
Southwest
7.9
Good
4,250 reviews

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

7.9

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Frontier
5.8
Fair
3,082 reviews
Southwest
7.9
Good
4,250 reviews

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

7.9

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

Find useful and relevant information for your journey from Idaho to Colorado. 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 Idaho to Colorado flight route?

    Flights from Idaho to Colorado have been viewed 100 times in the past calendar month.

  • How long is the flight from Idaho to Colorado?

    A quick flight from Idaho to Colorado can take about 1h 50m. Alaska Airlines provides one of the quickest options available for as low as $177. The distance between Idaho and Colorado is about 647 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Idaho to Colorado one-way?

    The cheapest airlines for a one-way flight from Idaho to Colorado are Frontier ($40), Allegiant Air ($42), and United Airlines ($98).

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Idaho to Colorado 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 Colorado?

    Currently, September is the cheapest month in which you can book a flight from Idaho to Colorado (average of $58). Flying from Idaho to Colorado 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.

See more FAQs

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Alternative routes for Idaho to Colorado

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Idaho to Colorado

Discover the top 6 airlines that operate flights from Idaho to Colorado. 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.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$54Average$88FlexibilityNo cancel feeOn-time88%
FrontierCheapest$58Average$147FlexibilityNo cancel feeOn-time62%
DeltaCheapest$136Average$332FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$154Average$428FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$179Average$378FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$192Average$304FlexibilityNo cancel feeOn-time63%

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