DEN - BOI

$26 Find Cheap Flights from Denver to Boise

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 Boise departing on 12/20. 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.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Boise

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

Cheap Flights from Denver to Boise (DEN-BOI)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Denver to Boise 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Denver to Boise

Thu, Dec 11 - Tue, Dec 16
Multiple Airlines Logo
9:42 am - 11:49 amDEN-BOI
2h 07mnonstop
Multiple Airlines Logo
6:03 am - 11:44 amBOI-DEN
5h 41m1 stop
$125Multiple Airlines
Find Deal
Fri, Dec 5 - Sun, Dec 7
Multiple Airlines Logo
3:42 pm - 10:56 pmDEN-BOI
7h 14m1 stop
Multiple Airlines Logo
12:44 pm - 2:45 pmBOI-DEN
2h 01mnonstop
$126Multiple Airlines
Find Deal
Mon, Nov 24 - Fri, Nov 28
Frontier Logo
5:55 pm - 7:59 pmDEN-BOI
2h 04mnonstop
Frontier Logo
12:48 pm - 2:52 pmBOI-DEN
2h 04mnonstop
$138Frontier
Find Deal
Thu, Dec 4 - Sat, Dec 6
Multiple Airlines Logo
9:42 am - 11:49 amDEN-BOI
2h 07mnonstop
Multiple Airlines Logo
7:25 am - 6:03 pmBOI-DEN
10h 38m2 stops
$141Multiple Airlines
Find Deal
Fri, Nov 21 - Sun, Nov 23
Frontier Logo
9:49 am - 11:53 amDEN-BOI
2h 04mnonstop
Frontier Logo
12:48 pm - 2:52 pmBOI-DEN
2h 04mnonstop
$157Frontier
Find Deal
Fri, Dec 5 - Fri, Dec 5
Southwest Logo
8:10 am - 10:15 amDEN-BOI
2h 05mnonstop
Southwest Logo
2:40 pm - 4:30 pmBOI-DEN
1h 50mnonstop
$177Southwest
Find Deal
Fri, Dec 5 - Fri, Dec 5
Delta Logo
5:30 am - 10:15 amDEN-BOI
4h 45m1 stop
Delta Logo
3:54 pm - 12:24 amBOI-DEN
8h 30m1 stop
$197Delta
Find Deal
Thu, Dec 11 - Thu, Dec 18
Southwest Logo
1:05 pm - 3:05 pmDEN-BOI
2h 00mnonstop
Southwest Logo
5:40 pm - 7:30 pmBOI-DEN
1h 50mnonstop
$199Southwest
Find Deal
Thu, Dec 4 - Sat, Dec 6
United Airlines Logo
11:35 am - 1:39 pmDEN-BOI
2h 04mnonstop
United Airlines Logo
6:20 am - 8:18 amBOI-DEN
1h 58mnonstop
$214United Airlines
Find Deal
Fri, Dec 5 - Fri, Dec 5
United Airlines Logo
7:45 am - 9:59 amDEN-BOI
2h 14mnonstop
United Airlines Logo
5:25 pm - 7:32 pmBOI-DEN
2h 07mnonstop
$247United Airlines
Find Deal

Everything you should know

Our travelers' advice
AI-generated summary based on content written by travel experts
Southwest offers two free checked bags for families.
United's Economy Plus provides extra legroom benefits.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Frontier
Cheapest • from $138 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 43% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 41% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$125
Overall average: $423
Multiple Airlines
Thu 12/11Tue 12/16
DEN - BOI • Non-stop
Cheapest non-stop
$138
Typical prices: $303-$565
Frontier
Mon 11/24Fri 11/28
DEN - BOI • Non-stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Boise!
Booking Insights

KAYAK's insights & trends for Denver to Boise flights

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

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

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

If you are looking for a flight deal from Denver to Boise, look for departures on Thursdays and avoid leaving on a Monday, as it's usually the priciest day. When flying back from Boise, Thursday is the cheapest day to fly and Sunday is the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Denver to Boise, 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 Boise is September, where tickets cost $163 (return) on average. On the other hand, the most expensive months are December and November, where the average cost of round-trip tickets is $423 and $331 respectively.

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

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 Boise, 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 Boise, you should book around 4 weeks before departure, which saves you about 43% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

Expert advice

Expert advice for your flight from Denver to Boise

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
United Airlines

Consider Economy Plus for up to six inches more legroom than standard economy seats.


Purchase Priority Boarding to ensure overhead bin space for your carry-on.

Southwest

Southwest offers free snacks and soft drinks, with Wi-Fi available for streaming entertainment.


Southwest's Rapid Rewards program features unlimited rewards seats and points that don’t expire.

Read more about Southwestby Blane Bachelor
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on United Airlines

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more
Blane Bachelor

Blane Bachelor

Expert on Southwest

Blane Bachelor

Blane Bachelor

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Read more

Good to know

Low seasonJanuary
Cheapest flight$26
Best time to beat the crowds but there is an average 8% increase in price.
Most popular time to fly and prices are also 17% lower on average.
Flight from Denver to Boise

When to book flights from Denver to Boise

Are your dates flexible? Find out the best times to travel from Denver to Boise based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Denver to Boise

  • How can I fly from DEN to BOI?

    United Airlines and Southwest are two airlines that operate non-stop flights from DEN to BOI. Delta, Spirit Airlines, American Airlines, Alaska Airlines, and Frontier are examples of some of the airlines that operate flights from DEN to BOI with one stop in between. Layover cities include Seattle (SEA), Salt Lake City (SLC), San Francisco (SFO), Los Angeles (LAX), and Phoenix (PHX).

  • Does BOI have facilities for nursing mothers?

    Yes. Pre-security, BOI has a Mamava lactation pod for nursing mothers. This 4X8 freestanding unit is private, clean, and lockable. It has two benches, a shelf, a mirror, a coat hook, and an outlet. Beyond security, BOI also has a lactation room. This sanitized, private location has a changing station, a chair, and a sink.

  • How do I get from BOI into downtown Boise?

    Buses run from BOI into downtown Boise to the intersection of West River Street and South Capitol Boulevard. Bus 3 can get you there in about 10min and bus 4 can get you there in about 20min. The Boise Taxi Company frequents the Arrivals lanes at BOI and often takes fares into Boise on a trip that lasts about 8min.

  • Does DEN have an animal therapy program?

    Yes. In fact, the DEN CATS (Canine Airport Therapy Squad) has about 80 dogs and one cat teamed with trained handlers. These teams roam the airport offering solace and comfort to passengers who might be feeling anxious, stressed, bereaved, or confused. These animals are recognizable in their plaid vests of bright purple that say, “Pet me.”

  • What is the cheapest flight from Denver to Boise?

    In the last 3 days, the lowest price for a flight from Denver to Boise was $26 for a one-way ticket and $125 for a round-trip.

  • Do I need a passport to fly between Denver and Boise?

    A passport is not required to fly from Denver to Boise.

  • Which airports will I be using when flying from Denver to Boise?

    Denver and Boise are both served by 1 main airport. You will leave Denver from Denver Intl and will be arriving at Boise Air Term. Gowen Fld.

  • Which airlines offer Wi-Fi service onboard planes from Denver to Boise?

    American Airlines, Alaska Airlines, and JetBlue offer inflight Wi-Fi service on the Denver to Boise flight route.

  • Which aircraft models fly most regularly from Denver to Boise?

    The Boeing 737-900 is the aircraft model that flies most regularly on the Denver to Boise flight route.

  • Which airline alliances offer flights from Denver to Boise?

    SkyTeam, and Star Alliance are the airline alliances operating flights between Denver and Boise, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Denver to Boise?

    There are nonstop flights from Denver to Boise on a daily basis.

  • Which is the best airline for flights from Denver to Boise, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Denver to Boise are Southwest and Delta. With an average price for the route of $289 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $236 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Denver to Boise?

    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 Boise.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Boise from Denver 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 Boise?

    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 to Boise with an airline and back to Denver with another airline. Booking your flights between Denver and BOI can sometimes prove cheaper using this method.

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

    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 to Boise from Denver up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Denver to Boise

  • Looking for a cheap flight? 25% of our users found flights on this route for $125 or less one-way and $177 or less round-trip.
  • Denver International Airport (DEN) serves as a hub for United Airlines and Frontier Airlines. It also serves as a focus city for Southwest Airlines. Boise Airport - Boise Air Terminal - Gowen Field (BOI) is not a hub for any airlines, but it is a focus city for Alaska Airlines.
  • As you're traveling through BOI, you can appreciate the work of Idaho artists at the Art Source Gallery. The gallery is located on the second floor of Concourse B.
  • If you are traveling with a service animal or pet who needs to go to the bathroom as soon as you land at BOI, you can take advantage of either of the two animal relief stations at the airport. One of them is located Landside, outside the baggage claim, on the first floor, to the west. The other animal relief area is Airside.
  • If you want to stay near the DEN the night before your flight to BOI, consider staying at the Westin Hotel at Denver International Airport. This hotel is on airport grounds and connected to the airport. Aside from its convenient proximity to the airport, this hotel has a pool and a restaurant.
  • In Terminal A, DEN features a USO lounge that welcomes active duty, reserve, guard, or dependents with a US military ID card. Open from 7 am to 7 pm, this USO offers coffee and tea, snacks, beverages, charging stations, Wi-Fi, TV, comfy seating, a sleeping area, and flight boards.

Prefer to fly direct from Denver to Boise?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Denver Intl to Boise Air Term. Gowen Fld.
Find which airlines fly direct from Denver Intl Airport to Boise Air Term. Gowen Fld Airport, which days they fly and book direct flights.

Direct departures

Denver Intl to Boise Air Term. Gowen Fld

Monday

Frontier, Southwest, United Airlines

Frontier, Southwest, +1 more

Tuesday

Frontier, Southwest, United Airlines

Frontier, Southwest, +1 more

Wednesday

Southwest, United Airlines

Southwest, United Airlines

Thursday

Frontier, Southwest, United Airlines

Frontier, Southwest, +1 more

Friday

Frontier, Southwest, United Airlines

Frontier, Southwest, +1 more

Saturday

Southwest, United Airlines, Frontier

Southwest, United Airlines, +1 more

Sunday

Frontier, Southwest, United Airlines

Frontier, Southwest, +1 more

See more direct flights

Direct returns

Boise Air Term. Gowen Fld to Denver Intl

Monday

Frontier, Southwest, United Airlines

Frontier, Southwest, +1 more

Tuesday

Frontier, Southwest, United Airlines

Frontier, Southwest, +1 more

Wednesday

Southwest, United Airlines

Southwest, United Airlines

Thursday

Frontier, Southwest, United Airlines

Frontier, Southwest, +1 more

Friday

Frontier, Southwest, United Airlines

Frontier, Southwest, +1 more

Saturday

Southwest, United Airlines, Frontier

Southwest, United Airlines, +1 more

Sunday

Frontier, Southwest, United Airlines

Frontier, Southwest, +1 more

See more direct flights

Reviews of the top 4 airlines serving from Denver to Boise

 
See real verified KAYAK customer reviews for airlines flying from Denver to Boise. 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 Boise? 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 4242 reviews
8.6Crew
8.0Comfort
8.1Boarding
7.5Entertainment
7.0Food
Airline reviews

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

8.0 ExcellentGreg, Oct 2025OAK - BUR
Read more Southwest reviews

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

Full cans of soda would be nice. A choice between two snacks would be appreciated.

Tried watching free movie and it kept freezing so I couldn’t finish.

All was good. I just had a hard time getting connected to the WiFi/internet during the flight

Sacrament staff are always polite and helpful. Airport is easy to maneuver and boarding is straightforward.

Great flight. Outstanding Service. Southwest was able to put us on a direct flight to Denver when the connection could have been affected by a later arrival to Baltimore. The direct flight was less expensive that the flight with the connection in Baltimore.

Delays delays delays. Late taking off, late landing, wait for a gate, etc.

Boarded on time but once we were ready for take off, the crew determined that, although every seat was taken, somehow someone was on the wrong flight. Delay, delay delay, announcements and ended up with one person checking EVERY ID against their passenger Manifest only to figure out it was a "clerical error." We departed 54 minutes late causing me to run in the St. Louis Airport to make my connection and lose the priority boarding spot I had paid for. Unnecessary delay.

I was re-booked onto another flight because my original flight was delayed and I would have missed my connector. I ended up in the “C” group after paying extra to be in the “A “ group on the original flight. At least if you’re going to re-book people, re-book them into the same group.

Flight was delayed due to plane not passing inspection And one of the crew had to time out and we had to wait for another one A 3 hour delay

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Non stop on long haul is the way to go. Great experience

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

Flight was crowded and the woman sitting on my left was large & kept crouching in to my space. You need bigger seats or smaller passengers to fit into the seats you DO have! Snack were OK. Would appreciate if airlines had more savory rather than sweet snacks, thank you!

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

We were delayed, which I think had to do with air traffic control. Otherwise, everything was great.

Crew seemed a bit cranky. No seatback screens. But boarding was efficient and on time and we arrived early.

See previous note about the passenger in Denver who threw my husband's bag out of the overhead bin in order to maker room for his own. And the flight attendant back up the new passenger.

Terrible. They wouldn't allow me on my flight on the 14th..

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, 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

Terrible. The canceled my entire flight when I requested a refund for a trip frontier canceled trip one way.

Boarding was on time and plane departed as scheduled. There are obviously no amenities (food, drink, entertainment) on Frontier, but there also didn't seem to be any issues with luggage space either.

Inbound plane was on time and flight departed on time with no issues while boarding.

I knew going into this that Frontier, being a low cost carrier, would be pretty bare bones and charge for most extras but this was made up for by the fact that the airplane was a reasonably new Airbus, every employee was great and best of all, Everett Washington is an amazing airport - thanks Frontier for flying there!!!

i was unable to check in the flight. refund requested

It was well done. It was my first time flying with them and I was nervous b/c I have heard of many cancelled and/or delray flights. Everything went smoothly.

Just know that everything, and I mean everything is “ala cart”. 60$ just to put something in the overhead bin. I will never fly Frontier again nor do I recommend them to anyone else.

Frontier is the Walmart of airlines. Frontier has removed adjustability and comfort from their seats to make the flight lighter and save gas. This makes it impossible to sleep on their flights. Their customer service is abysmal. Once, I bought a drink on the plane, and they swiped my credit card on the plane to pay for it. Then I got three weeks of daily notices from my bank telling me they tried to charge the wrong card number over and over again. I tried to call them, but they removed the ability to actually talk to someone that can resolve such a problem from their company to cut corners. The only way to talk to someone in person is to go to the check-in counter at the airport (40 minutes drive from my house). Eventually their system gave up on trying to charge the card, after 21 days of repeated tries. They don't pad their prices even a little to handle customer service issues like missed flights. They also have a blanket policy preventing helping you reschedule a missed flight if their system says you "cancelled" your own flight online. This is a major problem because their website is broken on mobile devices, the only web browser you have at the airport when their gate staff tell you that you have to reschedule your own missed flight online because they can't help you. I tried to reschedule my flight on my android device and instead, their website crashed and "cancelled" my missed flight. When I got to the counter, the agent argued with me for 5 minutes insisting that I intentionally cancelled my own flight (implying I had to buy another flight). She missed the point: the problem was that I could not buy another flight because their website is broken. I left to avoid more conflict with the "customer service" agent. I tried to redress my issue with their only other "customer service" chanel available: the contact form on their website. The response I got was more of the same: you cancelled your own flight, according to our website / computer records, therefore we won't help you. I was trying to explain the problem with their broken website that cost me hundreds of dollars by crashing / malfunctioning and resulting in a cancelled flight, but they only had deaf ears for this problem. Worst customer service I have ever experienced. I will never buy another Frontier flight again, because it is a risky, painful move that I will likely regret often.

What I expected, nickeled and dined and a frontier flight attendant loudly complained about her job and lack of communication as she headed to the gate on her cell phone. Not professional.

I’m not gonna fly Frontier Airlines because booking is not an option. No water or food is for high price, not equipped for health emergency incompetent crew for emergency services. Cheap airline shows it is cheaper in all service categories. Boarding is the best of all airlines!

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

Information on your arrival and departure airports

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