$50 Find Cheap Flights from Denver to Idaho

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to Idaho departing on 5/25. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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KAYAK searches hundreds of travel sites at once for deals on flights to Idaho

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Idaho, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Idaho, as well as popular online travel agencies
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Best Idaho Flight Deals from Denver

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Boise
Boisenonstop$131
Idaho Falls
Idaho Fallsnonstop$89
Hailey
Hailey1 stop$217
Lewiston
Lewiston1 stop$432
Twin Falls
Twin Falls1 stop$396
Pocatello
Pocatello1 stop$407
Spokane
Spokanenonstop$138
Boise
Boisenonstop$131
Idaho Falls
Idaho Fallsnonstop$89
Hailey
Hailey1 stop$217
Lewiston
Lewiston1 stop$432
Twin Falls
Twin Falls1 stop$396
Pocatello
Pocatello1 stop$407
Spokane
Spokanenonstop$138

Cheap Flight Deals from Denver to Idaho (DEN-USID)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Denver to Idaho that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Denver to Idaho

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Denver to Idaho.
Discover the best prices for you by selecting your travel dates on KAYAK.
Allegiant Air Logo
3:23 pm - 5:07 pmDEN-IDA
1h 44mnonstop
Allegiant Air Logo
5:49 pm - 7:37 pmIDA-DEN
1h 48mnonstop
$89Allegiant Air
Find Deal
Sun, Jun 15 - Sun, Jun 29
Allegiant Air Logo
3:23 pm - 5:07 pmDEN-IDA
1h 44mnonstop
Allegiant Air Logo
5:49 pm - 7:37 pmIDA-DEN
1h 48mnonstop
$92Allegiant Air
Find Deal
Sun, Jun 15 - Sun, Jun 29
United Airlines Logo
11:33 am - 1:32 pmDEN-BOI
1h 59mnonstop
United Airlines Logo
5:43 pm - 7:40 pmBOI-DEN
1h 57mnonstop
$189United Airlines
Find Deal
Tue, May 27 - Wed, May 28
Alaska Airlines Logo
5:49 pm - 11:45 pmDEN-BOI
5h 56m1 stop
Alaska Airlines Logo
5:39 pm - 12:05 amBOI-DEN
6h 26m1 stop
$199Alaska Airlines
Find Deal
Wed, May 28 - Wed, Jun 4
Southwest Logo
7:55 am - 9:50 amDEN-BOI
1h 55mnonstop
Southwest Logo
5:05 am - 7:00 amBOI-DEN
1h 55mnonstop
$200Southwest
Find Deal
Sat, May 24 - Mon, May 26
Delta Logo
7:05 am - 10:40 amDEN-WYS
3h 35m1 stop
Delta Logo
3:15 pm - 7:30 pmWYS-DEN
4h 15m1 stop
$202Delta
Find Deal
Fri, May 23 - Tue, May 27
Alaska Airlines Logo
6:00 am - 12:28 pmDEN-GEG
7h 28m1 stop
Alaska Airlines Logo
6:07 pm - 11:59 pmGEG-DEN
4h 52m1 stop
$206Alaska Airlines
Find Deal
Tue, Jun 17 - Tue, Jun 24
Delta Logo
6:25 pm - 10:49 pmDEN-BOI
4h 24m1 stop
Delta Logo
5:40 pm - 10:30 pmBOI-DEN
4h 50m1 stop
$209Delta
Find Deal
Sat, May 24 - Sun, May 25
Southwest Logo
9:10 pm - 11:05 pmDEN-BOI
1h 55mnonstop
Southwest Logo
2:00 pm - 6:55 pmBOI-DEN
4h 55m1 stop
$210Southwest
Find Deal
Tue, Aug 19 - Sat, Aug 23
United Airlines Logo
11:35 am - 1:21 pmDEN-IDA
1h 46mnonstop
United Airlines Logo
5:55 pm - 7:40 pmIDA-DEN
1h 45mnonstop
$219United Airlines
Find Deal
Tue, May 27 - Tue, Jun 3
Useful Info

KAYAK's insights & trends for Denver to Idaho flights

Get data-powered insights and trends into flights from Denver to Idaho to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest Denver to Idaho flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from Denver to Idaho.

The cheapest ticket to Idaho from Denver found in the last 72 hours was to Boise, at $70 round-trip. The most popular route is from Denver (DEN) to Boise (BOI), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $70.

Can I save money by flying with a layover from Denver to Idaho?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $431, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Denver to Idaho?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Denver to Idaho, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Denver to Idaho is March, when tickets cost $277 (return) on average. On the other hand, the most expensive months are December and November, when the average cost of round-trip tickets is $443 and $362 respectively.

What’s the cheapest day of the week to fly from Denver to Idaho?

The average price of all round-trip flights from Denver to Idaho clicked on KAYAK for each day over the last 12 months.

When flying from Denver to Idaho, you should consider leaving on a Saturday and avoid Mondays if you are looking for the best rates. For your return to Denver, you’ll find the best rates on Wednesdays and the most expensive ones on Mondays.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Denver to Idaho, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Denver to Idaho, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.


Good to know

Low seasonJanuary
High seasonJuly
Cheapest flight$50
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly and prices are also 5% lower on average.
Flight from Denver to Idaho Falls

FAQs - booking Idaho flights

  • How does KAYAK find such low prices on flights from Denver 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 Denver to Idaho.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Denver 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 Denver 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 Denver 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 Denver 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 Denver to Idaho up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

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

    The cheapest time of day to fly to Idaho is generally in the afternoon, when round-trip flights cost $297 on average. Morning departures are around 1% 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 $310.

Top 5 airlines serving from Denver to Idaho

 
See real verified KAYAK customer reviews for airlines flying from Denver to Idaho. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Denver 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
Alaska AirlinesOverall score based on 9968 reviews
7.1Entertainment
8.5Crew
8.2Boarding
7.9Comfort
7.1Food
Airline reviews

My youngest didn't have a assigned seat until we biard6the plane.

2.0 MediocreStephanie, Apr 2025SAN - SLC
Read more Alaska Airlines reviews

My youngest didn't have a assigned seat until we biard6the plane.

Booked a premium seats weeks ago and got an email the night before that id instead be seated in the cabin. Only reason I booked this overnight flight was for the better seating. All they are doing to compensate is giving a $29 coupon to use on another flight. I won’t be booking this airline again.

It was all great all around. Will travel with Alaska next trip.

I got the last seat on the plane, in the back in the corner against the window, and I paid a competitive price for my ticket several weeks before the flight.

Everything was good. However, the selections of movies and TV shows were boring and unexciting. It was disappointing.

Long delay before boarding. By the time I was informed of the delay I was already at the gate.

There was no seating at the gate, no where to charge your devices, super crowded. Boarding in group F meant all luggage space was taken when it was time for me to board. The boarding crew was short with everyone and seemed irritated. The luggage space was insufficient, the seat was too small for me (6'4") and very uncomfortable trip. I was in a middle seat between a person snoring the whole trip and a person with very strong body odor. The flight crew was terse and unfriendly, seemed irritated and impatient. Yelled a lot at people with earbuds in, understandable. Finally, we arrived 10 minutes early, only to sit on the tarmac for 20 minutes and wait for a gate. Worst flight experience I've had in years.

I made a mistake. Read what I wrote in the flight from Dulles to SEA. The negative experience was from SEA to BOI. Total garbage. Wont do it again.

Flight 351 SEA to BOI was terrible. We got to cruising altitude and I needed to use the restroom but the fasten seatbelt sign never came off. There was no turbulence and I'd felt the plane level off so I stood up to use the restroom about 15 minutes after we leveled off. The stewardess went over the intercom and said I needed to be seated because the captain hadn't turned off the fasten seatbelt sign....Which... Fair.... But not five minutes later she went and used the bathroom. Felt very unprofessional to leave a paying customer with a burning urethra for the entire flight and bark at them to sit down and still use the bathroom yourself. They never did turn off the seatbelt sign.

For longer trips, snacks are puny, boring and don’t have ANY nutritional value.

It is southwest seat was ok. Not the most comfortable seat

I’ve always loved Southwest. No issues at all. I was flying standby and the gate agent was extremely friendly and helpful. Boarding was smooth and I was able to get a window seat in the emergency exit row. Crew was fantastic! They were very professional and accommodating. We had to divert from our destination due to weather but the flight crew kept everyone at ease and informed us of all pertinent information. Excellent flight

The price of the tickets isn't matching the flight experience. No matter how long the flight is, you're only getting pretzels. The flight attendants looked unkept and over it.

Plz don't take away free bags and free seating

The seats were a bit cramped and worn, but otherwise okay.

I would have liked to arrive on time - not 5 hours late!

After a 3 hour layover in Denver my flight was delayed over 5 hours! No explanation; no assistance; no offer to provide compensation; no one at Southwest was willing to offer any assistance. 8 hours in the Denver airport - ridiculous!

It was a perfect flight in all aspects! Both legs!

Only one drink pass through the cabin for a 4 hour flight. Quite rough and bumpy landing.

Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.

Delta is my preferred airline. I've traveled with them for years. On time in most cases, good communication, easy to use app. Most planes are pretty nice. I was on a CRJ 700/900 however, which was pretty badly aged inside and needed a refresh. No infotainment, unreliable wifi, best to download before boarding or bring a book. Food choices are really just snacks on this flight, nice variety but about what you'd expect. Great staff and prompt in departure and early arrival too. Overall quite satisfied.

Crew was friendly Love the entertainment in the seat head rest.

Delta flight was on time, seats were comfortable, and crew was nice.

This had nothing to do with Delta… The flights were on time and flawless. The service was excellent. We purchased seats in (aisle/middle) comfort plus since this was a cross country flight. Unfortunately, the woman seated at the window was 300+ pounds and, as might be expected, covered up about a third of the middle seat also. there was absolutely nothing that Delta could have done about that… I just don’t know what the answer should be. If you purchase a seat, you should should be able to use the entire seat and not just the portion that someone else is not sitting/oozing in. Disappointing…there should be something that could be done….I'm just not sure what solution could be.

Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.

The worst part was I was NOT allowed in the lounge even though I was holding a first class ticket and have a premium American Express card. I have flown Business or First Class with many airlines. Delta is the ONLY one who does not extend this courtesy to anyone except people who hold the very expensive American Express card. As a result, I won’t fly Delta if I have any other choice.

A little bumpy ride . No food was being provided due the the turbulence. That was ok it was a short flight to my standards.

Simply outstanding. Their new lounge for Delta One customers is a cut above the rest.

The Dekta Rep that checked us in was great. She's very personable, pleasant, and can tell she enjoys her job.

The plane was old with small storage areas that had problems closing/latching and not enough storage for everyone, and worn, damaged seats. Service was great but feel a little unsafe on such well used planes.

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, 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

Had a hard time finding my assigned seat. No attendants to assist.

The negative was the wait at the airport coming back. I checked my bags in, an hour before boarding and I get the notification that my flight was delayed. Rather had gotten the notification while I was at the hotel. Then it was delayed 3 x’s. Ugh!

Plane still had screens for watching movies. Good selection too.

There was no air on the plane and it was very hot.

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.

Overall experience good. There was no food and seats were not terribly comfortable.

There was nothing to like, flight delayed had to move to different departure areas, disorganized to say the leasr

There were a lot of issues every step of the process. Check in, security, boarding, and dealing with luggage. Plus the money you think you are saving you end up using in hidden fees.

The flight attendant was arguing with a passenger before takeoff. The passenger was frustrated but the flight attendant should have handled it with grace, but instead she was nasty and rude. The seats were comfortable and the flight was uneventful. I wish we didn’t have to pay for drinks or snacks but that’s what you get with a budget airline.

Booked two aisle seats and were switched to an aisle and middle. Not happy.

I fly Frontier often and generally don't have any issues. For some reason, the Denver to Houston's George Bush Intercontinental (IAH) flight always needs to wait on the tarmac in Houston because a gate is not available after landing. I've been stuck for as little as 15 minutes and as much as a little over an hour. I know only fly the Frontier Denver to IAH route when there is not an available flight to Houston Hobby (HOU).

Everything you need to know for your flight from Denver to Idaho

Information on your arrival and departure airports

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