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£86 Cheap Flights from Denver (DEN) to Boise (BOI)

View £86 flight on Sat, 12 Sept 2026Opens in a new window

Popular airlines from Denver International Airport (DEN) to Boise Airport (BOI)

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Cheap Flights from Denver (DEN) to Boise (BOI)

Prices were available within the past 7 days and start at £86 for one-way flights and £213 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Mon, 16 Nov - Mon, 23 Nov
DEN
Denver
BOI
Boise
£213 Return, found 3 days ago
£213
Return
found 3 days ago
Select Alaska Airlines flight, departing Mon, 16 Nov from Denver to Boise, returning Mon, 23 Nov, priced at £213 found 3 days ago
Alaska Airlines
Mon, 16 Nov - Mon, 23 Nov
DEN
Denver
BOI
Boise
£214 Return, found 3 days ago
£214
Return
found 3 days ago
Select Alaska Airlines flight, departing Mon, 16 Nov from Denver to Boise, returning Mon, 23 Nov, priced at £214 found 3 days ago
Alaska Airlines
Mon, 2 Nov - Sun, 8 Nov
DEN
Denver
BOI
Boise
£220 Return, found 4 days ago
£220
Return
found 4 days ago
Select Alaska Airlines flight, departing Mon, 2 Nov from Denver to Boise, returning Sun, 8 Nov, priced at £220 found 4 days ago
Alaska Airlines
Sun, 15 Nov - Sun, 22 Nov
DEN
Denver
BOI
Boise
£227 Return, found 3 days ago
£227
Return
found 3 days ago
Select Alaska Airlines flight, departing Sun, 15 Nov from Denver to Boise, returning Sun, 22 Nov, priced at £227 found 3 days ago
Alaska Airlines
Sun, 15 Nov - Sun, 22 Nov
DEN
Denver
BOI
Boise
£228 Return, found 3 days ago
£228
Return
found 3 days ago
Select Alaska Airlines flight, departing Sun, 15 Nov from Denver to Boise, returning Sun, 22 Nov, priced at £228 found 3 days ago
Alaska Airlines
Wed, 18 Nov - Wed, 25 Nov
DEN
Denver
BOI
Boise
£239 Return, found 3 days ago
£239
Return
found 3 days ago
Select Alaska Airlines flight, departing Wed, 18 Nov from Denver to Boise, returning Wed, 25 Nov, priced at £239 found 3 days ago
Alaska Airlines
Mon, 16 Nov - Mon, 23 Nov
DEN
Denver
BOI
Boise
£240 Return, found 3 days ago
£240
Return
found 3 days ago
Select Alaska Airlines flight, departing Mon, 16 Nov from Denver to Boise, returning Mon, 23 Nov, priced at £240 found 3 days ago
Alaska Airlines
Mon, 16 Nov - Mon, 23 Nov
DEN
Denver
BOI
Boise
£242 Return, found 3 days ago
£242
Return
found 3 days ago
Select Alaska Airlines flight, departing Mon, 16 Nov from Denver to Boise, returning Mon, 23 Nov, priced at £242 found 3 days ago
Alaska Airlines
Thu, 12 Nov - Thu, 19 Nov
DEN
Denver
BOI
Boise
£246 Return, found 3 days ago
£246
Return
found 3 days ago
Select Alaska Airlines flight, departing Thu, 12 Nov from Denver to Boise, returning Thu, 19 Nov, priced at £246 found 3 days ago
Alaska Airlines
Mon, 2 Nov - Sun, 8 Nov
DEN
Denver
BOI
Boise
£247 Return, found 4 days ago
£247
Return
found 4 days ago
Select Alaska Airlines flight, departing Mon, 2 Nov from Denver to Boise, returning Sun, 8 Nov, priced at £247 found 4 days ago

Find the cheapest month to fly from Denver (DEN) to Boise (BOI)

February is typically the cheapest month to fly

From £46 - £153 per traveller.

Frequently asked questions

How much does a flight from Denver, CO (DEN) to Boise, ID (BOI) cost?
You can find one-way and return flights from Denver, CO (DEN) to Boise, ID (BOI) with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when DEN to BOI ticket fares go up or down.
What is the cheapest month to fly from Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI)?
If you're looking for the cheapest time to fly from Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI), April is typically your best bet! You can expect average return flight prices around £199 during this month. April often sees lower prices because it's just before the peak summer travel season, when demand starts to pick up. Other budget-friendly months to consider for this route include February and August.
Which airlines fly direct from Denver, CO (DEN) to Boise, ID (BOI)?
Enter DEN to BOI and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI)?
To find a cheap flight from Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI)?
The best airline to fly with from Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI) will differ from traveler to traveler. If you like to fly early, United offers early morning flights. If price is the most important factor, Frontier Airlines typically offers the lowest fares. Southwest Airlines offers the most daily flights from Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Denver, CO (DEN) to Boise, ID (BOI)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI)?
You'll find around 9 nonstop flights per day from Denver Intl. (DEN) to Boise (BOI). For even more choices, look at flights that include layovers, as there are approximately 53 connecting flights per day. Some common connection points include Seattle - Tacoma Intl. (SEA), Portland Intl. (PDX), and San Diego Intl. (SAN).
What is the earliest flight from Denver, CO (DEN) to Boise, ID (BOI)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from Denver, CO (DEN) to Boise, ID (BOI). To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI)?
You'll typically find the most flights from Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI) on a Thursday, with around 66 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Southwest Airlines, United, and Alaska Airlines. Flight schedules are fairly consistent throughout the week, with Thursdays offering only slightly more options than other days.
What are the most popular departure times for flights from Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI)?
The most popular departure times for flights from Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI) are in the early morning, from 6am to 9am. Many major carriers, including Southwest Airlines, Alaska Airlines and United, offer flights during this window. Many travelers prefer this because it allows for an early arrival in Boise, giving you more time to enjoy your day.
How long does it take to fly from Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI)?
Direct flights from DEN to BOI usually take about 2 hours, traveling roughly 1,043 kilometers. If you opt for a connecting flight, expect to add around 4 hours 20 minutes to your journey. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI)?
You can fly business class or first class between DEN and BOI. You can fly business class with Frontier Airlines and Delta.First class cabins are available on:
  • Alaska Airlines
  • Delta
  • United
  • American Airlines

How do I earn miles on a Denver, CO (DEN) to Boise, ID (BOI) flight with Expedia?
It's easy to earn miles on a Denver, CO (DEN) to Boise, ID (BOI) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
Is it cheaper to buy a plane ticket from Denver, CO (DEN) to Boise, ID (BOI) at the last minute?
Typically, booking a last minute flight from Denver, CO (DEN) to Boise, ID (BOI) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Denver, CO (DEN) to Boise, ID (BOI) flight and hotel package?
Securing a Denver, CO (DEN) to Boise, ID (BOI) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI)?
If you booked your Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Denver Intl.
Destination airport
Boise
Airlines serving
Alaska Airlines
Return price
£212
Distance
1036 km
Average flight time
1 hour 53 mins

Book with confidence

Compare flights from Denver to Boise easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Denver to Boise. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Boise in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Denver Intl. to Boise.  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Denver Intl. (DEN) to Boise (BOI)

The easiest way to view the best deals on flights from Denver to Boise today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Denver Intl. to Boise start at just £213 and range up to £247.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Denver and Boise
  • booking your flight during November, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Denver to Boise flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Denver Intl. to Boise for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Denver to Boise easily and book with confidence

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*Available to Expedia members.