$73 Cheap Flights from Denver (DEN) to Boise (BOI)

View $73 flight on Thu, Oct 30, 2025Opens in a new window

Popular airlines from Denver Intl. Airport (DEN) to Boise Airport (BOI)

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • one key icon

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Denver to Boise (DEN-BOI)

Prices were available within the past 7 days and start at $73 for one-way flights and $123 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Oct 28 - Sat, Nov 1
DEN
Denver
BOI
Boise
$123 Roundtrip, found 3 days ago
$123
Roundtrip
found 3 days ago
Select United flight, departing Tue, Oct 28 from Denver to Boise, returning Sat, Nov 1, priced at $123 found 3 days ago
Frontier Airlines
Fri, Dec 12 - Tue, Dec 16
DEN
Denver
BOI
Boise
$127 Roundtrip, found 3 days ago
$127
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Fri, Dec 12 from Denver to Boise, returning Tue, Dec 16, priced at $127 found 3 days ago
Frontier Airlines
Fri, Aug 29 - Thu, Sep 4
DEN
Denver
BOI
Boise
$129 Roundtrip, found 3 days ago
$129
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Fri, Aug 29 from Denver to Boise, returning Thu, Sep 4, priced at $129 found 3 days ago
United
Tue, Aug 26 - Sat, Aug 30
DEN
Denver
BOI
Boise
$133 Roundtrip, found 3 days ago
$133
Roundtrip
found 3 days ago
Select United flight, departing Tue, Aug 26 from Denver to Boise, returning Sat, Aug 30, priced at $133 found 3 days ago
Southwest Airlines
Wed, Dec 3 - Sun, Dec 7
DEN
Denver
BOI
Boise
$136 Roundtrip, found 3 days ago
$136
Roundtrip
found 3 days ago
Select Southwest Airlines flight, departing Wed, Dec 3 from Denver to Boise, returning Sun, Dec 7, priced at $136 found 3 days ago
United
Fri, Dec 12 - Tue, Dec 16
DEN
Denver
BOI
Boise
$140 Roundtrip, found 3 days ago
$140
Roundtrip
found 3 days ago
Select United flight, departing Fri, Dec 12 from Denver to Boise, returning Tue, Dec 16, priced at $140 found 3 days ago
United
Wed, Dec 3 - Sun, Dec 7
DEN
Denver
BOI
Boise
$142 Roundtrip, found 3 days ago
$142
Roundtrip
found 3 days ago
Select United flight, departing Wed, Dec 3 from Denver to Boise, returning Sun, Dec 7, priced at $142 found 3 days ago
Southwest Airlines
Fri, Dec 12 - Tue, Dec 16
DEN
Denver
BOI
Boise
$143 Roundtrip, found 3 days ago
$143
Roundtrip
found 3 days ago
Select Southwest Airlines flight, departing Fri, Dec 12 from Denver to Boise, returning Tue, Dec 16, priced at $143 found 3 days ago
Delta
Wed, Oct 8 - Sat, Oct 11
DEN
Denver
BOI
Boise
$155 Roundtrip, found 6 days ago
$155
Roundtrip
found 6 days ago
Select Delta flight, departing Wed, Oct 8 from Denver to Boise, returning Sat, Oct 11, priced at $155 found 6 days ago
American Airlines
Sat, Jan 17 - Wed, Jan 21
DEN
Denver
BOI
Boise
$159 Roundtrip, found 3 days ago
$159
Roundtrip
found 3 days ago
Select American Airlines flight, departing Sat, Jan 17 from Denver to Boise, returning Wed, Jan 21, priced at $159 found 3 days ago

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

May is typically the cheapest month to fly

From $108 - $334 per traveler.

Graph displaying average flight prices per month

Flights from Denver (DEN) to Boise (BOI)
Origin airport
Denver Intl.
Destination airport
Boise
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, Southwest Airlines, United
Roundtrip price
$123
Distance
647 mi
Average flight time
1 hour 58 mins

Denver to Boise Flights

The cheapest times to fly from Denver to Boise

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Denver to Boise are during the month of October. You can find some of the cheapest flights from Denver to Boise with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Denver to Boise

Sunday is one of the best days to book for cheap flights from Denver to Boise: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Denver to Boise

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Denver to Boise in 2025. You can also book with separate airlines for your outbound and return journeys, from $73 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Denver to Boise flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Denver to Boise airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Denver Intl. Airport (DEN) to Boise Airport (BOI) cost?
Get a cheap one-way flight from $73 or cheap return flight from $123 from Denver Intl. Airport (DEN) to Boise Airport (BOI) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Denver Intl. Airport (DEN) to Boise Airport (BOI)?
Flying in October is a good way to save, as it's the cheapest month for flights between DEN and BOI. You'll usually find the lowest fares during off-peak months.
Which airlines fly direct from Denver Intl. Airport (DEN) to Boise Airport (BOI)?
If you're departing from Denver Intl. Airport (DEN), you can catch a nonstop flight to Boise Airport (BOI) with United Airlines.
What is the cheapest airline that flies from Denver Intl. Airport (DEN) to Boise Airport (BOI)?
Southwest Airlines and United Airlines are popular airlines offering reasonable fares. Don't forget that flight prices from Denver Intl. Airport (DEN) to Boise Airport (BOI) can vary based on demand, travel dates and how early you book. With Expedia's filter tool, you can easily find a DEN to BOI flight that works with your plans and budget.
How many flights per day from Denver Intl. Airport (DEN) to Boise Airport (BOI)?
With, on average, 7 nonstop flights that operate from Denver Intl. Airport (DEN) to Boise Airport (BOI) every day, you'll be up in the air in no time.
What are the most popular departure times for flights from Denver Intl. Airport (DEN) to Boise Airport (BOI)?
More people fly between DEN and BOI at 8 PM than at any other point in the day. Rather go when it's quieter? Travel outside of rush hours and there's a chance you'll save on your fare as well.
What day of the week has the most flights from DEN to BOI?
Jet off on a Monday if you're after the biggest selection of flights from Denver Intl. Airport (DEN) to Boise Airport (BOI).
What is the earliest flight from Denver Intl. Airport (DEN) to Boise Airport (BOI)?
Denver Intl. Airport (DEN)'s earliest flight to Boise Airport (BOI) departs at approximately 7:45AM UTC-7. With a travel time of 2h 20m, you'll touch down at around 10:05AM UTC-7.
How long does it take to fly from Denver Intl. Airport (DEN) to Boise Airport (BOI)?
The average flight duration from DEN to BOI is 2 hours and 8 minutes, covering a distance of 650 mi.
What airline has the least delays from DEN to BOI?
United Airlines has the best track record for on-time direct flights from Denver Intl. Airport (DEN) to Boise Airport (BOI), with an on-time rating of 81%. Use the Expedia App to check your flight schedule before you head off and get real-time alerts about any trip changes.
What is the best time to fly from Denver Intl. Airport (DEN) to Boise Airport (BOI)?
To avoid potential delays on the Denver Intl. Airport (DEN) to Boise Airport (BOI) route, aim to fly before 3 PM. Departures after this time have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Boise from Denver Intl. Airport (DEN)?
Compare your flight options from Denver Intl. Airport (DEN) to Boise Airport (BOI). This is the only Boise airport you can land at if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Denver Intl. Airport (DEN) to Boise Airport (BOI) last-minute?
Waiting until just before your departure to book a flight from DEN to BOI often results in higher prices. While you may come across some last-minute deals, they aren't always guaranteed. Allow some flexibility in your schedule to boost your chances of scoring a bargain.
Is it cheaper to book a DEN to BOI flight and hotel package?
You'll generally save money by booking a DEN to BOI flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one convenient place. Once you've selected your ideal accommodations and flights, consider adding extras such as tours, car rentals and activities.
Can I cancel or change the date of my flight from Denver Intl. Airport (DEN) to Boise Airport (BOI)?
In most instances, you're able to cancel or reschedule your DEN to BOI flight. However, additional charges may apply, especially if you made your booking over 24 hours ago. Double-check your itinerary for the airline's rules and fees on flight changes, or if you'd like further details, head to our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.