$42 Find Cheap Flights from Colorado to Idaho

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Low seasonApril
High seasonJuly
Cheapest flight$42
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from Denver to Idaho Falls

FAQs for booking flights from Colorado to Idaho

  • How does KAYAK find such low prices on flights from Colorado to Idaho?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Colorado to Idaho.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Colorado to Idaho?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Colorado to Idaho is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Colorado to Idaho?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Colorado to Idaho with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Colorado to Idaho?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Colorado to Idaho up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which is the cheapest airport to fly into in Idaho?

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Idaho is Boise Air Term. Gowen Fld Airport (BOI), with an average flight price of $184.

  • What is the cheapest day to fly to Idaho?

    Based on KAYAK data, the cheapest day to fly to Idaho is Sunday where round-trip tickets can be as cheap as $227. On the other hand, the most expensive day to fly is Monday, where round-trip prices are $348 on average.

  • What is the cheapest time of day to fly to Idaho?

    The cheapest time of day to fly to Idaho is generally in the morning, when round-trip flights cost $277 on average. Morning departures are around 14% cheaper than evening flights, on average. The most expensive time of day to fly to Idaho is generally in the evening, which is peak travel time and where the average cost of a ticket is $322.

  • What is the cheapest flight to Idaho?

    The cheapest ticket to Idaho from Colorado found in the last 72 hours was to Boise, at $79 round-trip. The most popular route is Denver (DEN) to Boise (BOI) and the cheapest round-trip airline ticket found on this route in the last 72 hours was $79.

  • What is the cheapest month to fly from Colorado to Idaho?

    The cheapest month for flights from Colorado to Idaho is January, when tickets cost $288 (return) on average. On the other hand, the most expensive months are October and March, when the average cost of round-trip tickets is $428 and $418 respectively.

  • How far in advance should I book a flight from Colorado to Idaho?

    To get a below average price on the flight from Colorado to Idaho, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.

  • How long is the flight to Idaho?

    An average nonstop flight from Colorado to Idaho takes 5h 32m, covering a distance of 605 miles. The shortest route is Denver (DEN) to Jackson (JAC) with an average flight time of 1h 29m.

  • What are the most popular destinations in Idaho?

    Based on KAYAK flight searches, the most popular destination is Spokane (46% of total searches to Idaho). The next most popular destinations are Boise (29%) and Jackson (13%). Searches for flights to Idaho Falls (5%), to Hailey (4%) and to West Yellowstone (2%) are also popular.

Reviews of the top 5 airlines serving from Colorado to Idaho

 
Need help choosing which airline to fly with from Colorado to Idaho? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4273 reviews
8.0Comfort
7.6Entertainment
8.2Boarding
8.6Crew
7.0Food
Airline reviews

Delayed flight. Nicest crew member was a SW pilot flying seated next to me who kindly move to seat the final passenger. Flight extra delayed. My cup of refreshment of ginger ale was so packed with ice it was literally 2 sips.

4.0 OkayTraci, Jun 2025OAK - SEA
Read more Southwest reviews

Delayed flight. Nicest crew member was a SW pilot flying seated next to me who kindly move to seat the final passenger. Flight extra delayed. My cup of refreshment of ginger ale was so packed with ice it was literally 2 sips.

For my birthday trip this was my second time ever flying, this trip was the best.

after landing, we stay 2 hours on the taxi way before reaching the gate The airline and the crew were good though

No trays in our seats, we sat in first row, purchased a business class fare. Had to hold our drinks and snack in our hands. No plugs for our cell phones. Had to pay for it a drink cocktail each. Seats so uncomfortable.

Flight wasn’t even full, but too many carry-ons caused us to run out of bin space. New bag fee has folks who would usually check their bags carrying on. Watching Southwest morph into Spirit/Frontier is so sad to watch

Sat on tarmac for 2 hours and then missed my connecting flight

First time traveling on Southwest since bag fees were implemented. Usual good service. Just more expensive now.

Everything was on time. I was disappointed by the front section female, African American flight attendant. I did not see her name tag or would have identified by name not race. As passengers moved to the bathroom early in flight, she would say with a disdainful tone “I have to say the seat belt light is on” then go back to her book. Better trained flight attendants say something like be careful the seat belt light is on.

Cluster mess boarding. Can't wait for SWA reserved seating. Internet didn't seem to work on the plane.

Flights delayed by 4-6 hours. Boarding was a mess and unclear. Bags were not at arrival airport and had never even been put on the plane. No idea when I’ll get them. Don’t fly into Denver!

From Atlanta to Savannah - flight connection was way to short (we weren't even late landing ) and flight was already boarding when we landed - we were told we were the last on board and so we had to gate check our bags. Once we got on the plane, there were at least seven open bag spots so that was unnecessary delay. There should be better communication between the gate agent and the crew.

Crew was excellent. Comfort seats not as nice as other kinds of planes.

Not a "Delta" issue, but a JFK issue: We booked a connecting flight with 3 1/2 hours between to clearn immigration and customs. Our inbound flight (BCN to JFK) was on the taxiway 45 minutes which ate into our layover time. Immigtration was insanely quick with the CBP MPC app; however, clearing TSA (again, after we were ALREADY cleared in Spain on the inbound international flight) took over 95 minutes. This left us with 10 minutes before boarding the connecting flight (JFK to SAN) to walk to the far end of Terminal 4 and try to find food. We didn't find any food that could promise to serve us in under 10 minutes so we boarded the Delta flight after coming off a plance and an 8-hour flight knowing that we wouldn't be served any food on the next 5 1/2 hour flight. I feel like Delta needs to put pressure on the JFK TSA to open more screening stations (by our count, we saw only 5 scanners open and a line of - as we said - over 90 minutes. The insult is that we WERE ALREADY SCREENED through TSA, but as you come off one flight into the USA, you have to go through the whole process again. It seems like if you have a connecting flight, there should be a way to pass through immigration and customs without needing to return through TSA.

It was a great flight and the stewards and stewardess were all kind and accommodating!! The seats were comfortable and entertainment screen excellent!

There are 4 flights in consecutive gates with about the same departure time. Two flights were boarding at the same time. One was delayed or boarding would be happening at the same time. I am not sure what Delta and LAX need to do to have a better layout at the end of Terminal 2

Flight was an hour late, who knows why. It was OK, nothing outstanding.

Only not having an assigned seat was an issue. Rest was great

There was a security issue at the airport and we were unable to land. We circled endlessly and then landed at another airfield for fuel. We then circled the airport again, almost landed but didn’t fully touch down before circling again. I am thankful to the crew for keeping us safe- the issue was the airline and staff at the airport getting us seats on our connecting flights. That part was hours of searching for someone and getting in double my steps.

Boarding was organised and relaxed. Crew were fantastic! Seats were lacking padding causing butt pain and stiffness.

I like for how they process during check in. It was very smoothly.

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

Electric plugs didn't work. Entertainment system wasn't working

The design of the light switch on the arm rest is ridiculous.

The gate attendant let me walk right by her with a bag too big for the overhead compartment

Overall poor for me I paid extra for seats with leg room and my regional flights exit row seats have less leg room then the others that's money that could have been saved and on my final flight home the flights air was not operating it was unbearably hot in the cabin I will be contacting United and filing a DOT complaint

I don’t understand the purpose of the orange “priority” tag on my bag. This tagged, my bag is last or near to the last bag to come down the carousel at IAH.

Overall, it was a good experience. Boarding was good and there was plenty of overhead bin space for everyone’s carryons (even when we boarded toward the end). Only improvement would be to offer trash service more regularly.

David went above and beyond to make our flight the best that it could be

No food service almost missed because of first flight delays

Tight! Seats are not designed for those of us who wear extra-large clothes.

The non-stop flight from Grand Rapids was excellent. I neither expected or needed a budget flight and Allegiant made the trip easy and for an affordable price, Arriving at the Mesa Airport (AZA) is a delight compared to the international airport. For our return flight, we were able to arrive 75 minutes before the flight, return the rental car, check our bag and make it to the gate in plenty of time. That would never happen at most airports.

Easiest flights I’ve ever taken. Plane was comfortable without overly crowded seating.

Terrible. Still have not received the refund from them. They sent it to some account that I don't even know. Spoke with costumer service and they are unable to help.

I didn’t like it at all. I miss my second flight because of the delay on Allegiant Air now I m stuck in MCO.

Good, but a bit late on take off after loading. Don't like charging for carry ons!

First time flying with them and will definitely fly again in the future. Crew was so nice and friendly, fought was seamless. They are simple planes, no entertainment, but it’s fine for a short flight or if you have personal devices Rates are competitive, and they did so well with keeping the flight on time after a tropical storm, where other airlines had delays and cancellations.

They boarded passengers that sat in the back of the plane first, making boarding very efficient.

I didn't even take this flight. My plans changed and I couldn't get ahold of customer service and the website kept breaking down during the attempt to change the flight. I wound up taking another airline entirely and eating the cost.

The worst flying experience ever 3 delays. No accommodations. Had to deboard the plane after being delayed.

Very bad! No good service delayed my second connection flight

Frontier is terrible. Paid for exit row, not given exit row, refused to refund fee.

2 hour delay due to late plane, wrong size plane causing overbooking, and people getting off and on the plane after boarding was completed.

The worst. We never made our connection and they did absolutely nothing to help us at the airport.

I never got to experience the flight because they delayed my first flight and I missed this one. Then Frontier didn't want to help me rebook a flight to get me to my final destination.

The Boarding process in Denver was chaotic, and since the line was so long, we were lined up very far from the gate. If there were any announcements from the gate staff, we didn't hear them. The flight attendants were spectacular. The only negative part of the flight was sitting by a 2 1/2 year old who was unruly and unfortunately had parents that matched his behaviors. Also, the restaurants in Denver on the E concourse, they didn't have food (passengers could only order 1 item on the entire menu) or the restaurants had 12-14 people waiting for orders to be prepared and another 6 people waiting to order. If you have a layover in Denver and need to grab food, be prepared to visit the shops with pre-packaged sandwiches, or you can visit another concourse but it may take a while to transit throughout the airport.

Everything went as planned. Crew was great. Seats were still not that comfortable.

they delayed my flight which ended up, causing my layover flight to leave without me, resulting in me missing a flight and having to stay overnight in Houston international. I got no compensation other than a flight to my original location only a day later. i’ve never experienced such a unprofessional situation

The seats were extremely hard and uncomfortable, even for a budget airline.

Boarding was very well executed. Got my bag right away.

Book cheap flights from Colorado to Idaho

Recent round-trip flight deals

7/17Thu
nonstopAllegiant Air
1h 44mDEN-IDA
7/24Thu
nonstopAllegiant Air
1h 48mIDA-DEN
$84
7/17Thu
nonstopAllegiant Air
1h 44mDEN-IDA
7/20Sun
nonstopAllegiant Air
1h 48mIDA-DEN
$85
7/15Tue
nonstopFrontier
2h 21mDEN-GEG
7/22Tue
nonstopFrontier
2h 19mGEG-DEN
$98
7/22Tue
nonstopFrontier
2h 21mDEN-GEG
7/24Thu
nonstopFrontier
2h 19mGEG-DEN
$106
9/9Tue
nonstopUnited Airlines
2h 23mDEN-GEG
9/17Wed
nonstopUnited Airlines
2h 17mGEG-DEN
$197
10/2Thu
nonstopSouthwest
2h 00mDEN-BOI
10/8Wed
nonstopSouthwest
1h 50mBOI-DEN
$197
9/23Tue
1 stopDelta
4h 40mCOS-GEG
9/24Wed
1 stopDelta
4h 08mGEG-COS
$197
9/23Tue
2 stopsDelta
9h 30mCOS-GEG
9/24Wed
1 stopDelta
4h 08mGEG-COS
$202
9/22Mon
1 stopSouthwest
4h 45mDEN-BOI
10/1Wed
nonstopSouthwest
1h 55mBOI-DEN
$207
8/16Sat
1 stopUnited Airlines
6h 28mCOS-GEG
8/25Mon
1 stopUnited Airlines
6h 59mGEG-COS
$214

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Recent one-way flight deals

8/7Thu
nonstopAllegiant Air
1h 44mDEN-IDA
$42
7/6Sun
nonstopAllegiant Air
1h 44mDEN-IDA
$50
7/22Tue
nonstopFrontier
2h 21mDEN-GEG
$59
10/26Sun
nonstopFrontier
1h 55mDEN-BOI
$63
8/6Wed
nonstopUnited Airlines
2h 23mDEN-GEG
$89
9/15Mon
nonstopUnited Airlines
1h 57mDEN-BOI
$99
7/26Sat
1 stopDelta
3h 26mDEN-WYS
$103
10/13Mon
1 stopSouthwest
5h 20mDEN-GEG
$109
10/9Thu
1 stopDelta
4h 49mDEN-BOI
$109
9/15Mon
2 stopsSouthwest
9h 15mDEN-BOI
$114

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Last minute flights from Colorado to Idaho

Last minute flight, train and bus deals

7/6Sun
nonstopFrontier
1h 56mDEN-BOI
7/10Thu
nonstopFrontier
2h 00mBOI-DEN
$192
7/3Thu
nonstopAllegiant Air
1h 44mDEN-IDA
7/6Sun
nonstopAllegiant Air
1h 48mIDA-DEN
$202
7/2Wed
nonstopUnited Airlines
1h 45mDEN-IDA
7/6Sun
nonstopUnited Airlines
1h 56mIDA-DEN
$419
7/5Sat
multi-stopAlaska Airlines
6h 20mDEN-BOI
7/15Tue
multi-stopAlaska Airlines
6h 16mBOI-DEN
$424
7/5Sat
multi-stopAlaska Airlines
7h 43mDEN-BOI
7/14Mon
multi-stopAlaska Airlines
6h 16mBOI-DEN
$425
7/2Wed
nonstopUnited Airlines
1h 45mDEN-IDA
7/9Wed
nonstopUnited Airlines
1h 45mIDA-DEN
$429
7/6Sun
nonstopSouthwest
1h 55mDEN-BOI
7/10Thu
multi-stopSouthwest
6h 40mBOI-DEN
$504
7/6Sun
multi-stopSouthwest
8h 40mDEN-BOI
7/9Wed
multi-stopSouthwest
8h 00mBOI-DEN
$527
7/6Sun
multi-stopDelta
4h 56mDEN-BOI
7/11Fri
multi-stopDelta
4h 11mBOI-DEN
$585
7/2Wed
multi-stopDelta
3h 51mCOS-BOI
7/8Tue
multi-stopDelta
4h 13mBOI-COS
$585

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Everything you need to know for your flight to Idaho

Cabin class types available on flights to Colorado

Cabin classes available on flights to Colorado. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

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