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Idaho

$42+ 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — BOI
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
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 July 30, 2025.

Round-trip from

$84
(Cheapflightsfares)

One-way from

$42
(Cheapflightsfares)

Popular in

December

Cheapest in

May

Average price

$258

Good round-trip deal

$88 or less

Good one-way deal

$50 or less
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. 19% potential increase in price ($72 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 30, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 7/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/73:20 pmDEN - IDA
Nonstop1h 44mAllegiant Air
Sun 8/105:49 pmIDA - DEN
Nonstop1h 48mAllegiant Air
Deal found 7/29$84
This CheapOair deal was found by Cheapflights users on 7/28. 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.
Thu 8/219:36 amDEN - BOI
Nonstop2h 02mFrontier
Sun 8/2412:33 pmBOI - DEN
Nonstop2h 15mFrontier
Deal found 7/28$106
This Frontier deal was found by Cheapflights users on 7/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/129:45 amDEN - GEG
Nonstop2h 21mFrontier
Thu 8/1411:58 amGEG - DEN
Nonstop2h 33mFrontier
Deal found 7/29$134
This United Airlines deal was found by Cheapflights users on 7/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/173:40 pmDEN - JAC
Nonstop1h 35mUnited Airlines
Mon 10/205:56 pmJAC - DEN
Nonstop1h 44mUnited Airlines
Deal found 7/30$189
This United Airlines deal was found by Cheapflights users on 7/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/59:05 pmDEN - IDA
Nonstop1h 47mUnited Airlines
Sun 11/94:15 pmIDA - DEN
Nonstop1h 50mUnited Airlines
Deal found 7/29$189
This United Airlines deal was found by Cheapflights users on 7/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/67:45 amDEN - WYS
Nonstop1h 52mUnited Airlines
Sun 9/710:41 amWYS - DEN
Nonstop1h 44mUnited Airlines
Deal found 7/29$190
This Hawaiian Airlines deal was found by Cheapflights users on 7/29. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/196:00 amDEN - BOI
1 stop6h 20mHawaiian Airlines
Tue 8/262:28 pmBOI - DEN
1 stop7h 19mHawaiian Airlines
Deal found 7/29$198
This United Airlines deal was found by Cheapflights users on 7/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/207:45 amDEN - BOI
Nonstop1h 57mUnited Airlines
Wed 8/275:00 amBOI - DEN
Nonstop2h 05mUnited Airlines
Deal found 7/29$199
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/38:00 amDEN - BOI
1 stop5h 48mAlaska Airlines
Tue 9/166:35 amBOI - DEN
1 stop5h 35mAlaska Airlines
Deal found 7/30$207
This Southwest deal was found by Cheapflights users on 7/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/58:15 amDEN - BOI
Nonstop1h 55mSouthwest
Sat 9/1310:30 amBOI - DEN
Nonstop1h 55mSouthwest
Deal found 7/30$208
This Delta deal was found by Cheapflights users on 7/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/175:45 amDEN - JAC
1 stop5h 05mDelta
Wed 10/297:30 amJAC - DEN
1 stop4h 17mDelta
Deal found 7/29$209
This Delta deal was found by Cheapflights users on 7/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/26:25 pmDEN - IDA
1 stop4h 02mDelta
Sat 9/66:00 amIDA - DEN
1 stop5h 51mDelta
Deal found 7/27$209

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 July 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

DenverIdaho Falls

DEN - IDA

DENIDA

Denver Intl

Thu 8/7

3:20 pm-5:04 pm

Nonstop1h 44m

Idaho Falls Fanning Field

Sun 8/10

5:49 pm-7:37 pm

Nonstop1h 48m

$84

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Thu 8/21

9:36 am-11:38 am

Nonstop2h 02m

Boise Air Term. Gowen Fld

Sun 8/24

12:33 pm-2:48 pm

Nonstop2h 15m

$106

DenverSpokane

DEN - GEG

DENGEG

Denver Intl

Tue 8/12

9:45 am-11:06 am

Nonstop2h 21m

Spokane

Thu 8/14

11:58 am-3:31 pm

Nonstop2h 33m

$134

DenverJackson

DEN - JAC

DENJAC

Denver Intl

Fri 10/17

3:40 pm-5:15 pm

Nonstop1h 35m

Jackson Hole

Mon 10/20

5:56 pm-7:40 pm

Nonstop1h 44m

$189

DenverWest Yellowstone

DEN - WYS

DENWYS

Denver Intl

Sat 9/6

7:45 am-9:37 am

Nonstop1h 52m

West Yellowstone

Sun 9/7

10:41 am-12:25 pm

Nonstop1h 44m

$190

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Tue 8/19

6:00 am-12:20 pm

1 stop6h 20m

Boise Air Term. Gowen Fld

Tue 8/26

2:28 pm-9:47 pm

1 stop7h 19m

$198

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Wed 8/20

7:45 am-9:42 am

Nonstop1h 57m

Boise Air Term. Gowen Fld

Wed 8/27

5:00 am-7:05 am

Nonstop2h 05m

$199

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Wed 9/3

8:00 am-1:48 pm

1 stop5h 48m

Boise Air Term. Gowen Fld

Tue 9/16

6:35 am-12:10 pm

1 stop5h 35m

$207

DenverBoise

DEN - BOI

DENBOI

Denver Intl

Fri 9/5

8:15 am-10:10 am

Nonstop1h 55m

Boise Air Term. Gowen Fld

Sat 9/13

10:30 am-12:25 pm

Nonstop1h 55m

$208

DenverJackson

DEN - JAC

DENJAC

Denver Intl

Fri 10/17

3:41 pm-9:29 pm

1 stop5h 48m

Jackson Hole

Tue 10/21

7:30 am-11:47 am

1 stop4h 17m

$209

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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, October is the cheapest month in which you can book a flight from Colorado to Idaho (average of $314). Flying from Colorado to Idaho in June is currently the most expensive (average of $398). 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 July 30, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Colorado to Idaho as you normally would.

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 July 30, 2025.

The most flights from USCO to USID are scheduled on a Monday (20 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (10 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 July 30, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest, and Delta 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,241 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,896 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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 7 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    To fly one-way, consider booking your trip with Allegiant Air, which is currently one of the cheapest options available, starting at $42. Frontier flights start at $49 while deals on Alaska Airlines start at $99 one-way.

  • 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, October is the cheapest month in which you can book a flight from Colorado to Idaho (average of $314). Flying from Colorado to Idaho in June is currently the most expensive (average of $398). 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 7 airlines flying from Colorado to Idaho

Discover the top 7 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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$44Average$88FlexibilityNo cancel feeOn-time88%
FrontierCheapest$73Average$150FlexibilityNo cancel feeOn-time62%
DeltaCheapest$98Average$397FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$168Average$235FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$197Average$370FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$198Average$396FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$298Average$428FlexibilityNo cancel feeOn-time71%

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