$84 Cheap Flights from Boise (BOI) to Denver (DEN)

View $84 flight on Thu, Dec 18, 2025Opens in a new window

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

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Cheap Flights from Boise to Denver (BOI-DEN)

Prices were available within the past 7 days and start at $84 for one-way flights and $90 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Fri, Sep 19 - Sun, Sep 28
BOI
Boise
DEN
Denver
$90 Roundtrip, found 1 day ago
$90
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Sep 19 from Boise to Denver, returning Sun, Sep 28, priced at $90 found 1 day ago
Frontier Airlines
Thu, Nov 13 - Sun, Nov 16
BOI
Boise
DEN
Denver
$100 Roundtrip, found 1 day ago
$100
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Thu, Nov 13 from Boise to Denver, returning Sun, Nov 16, priced at $100 found 1 day ago
Frontier Airlines
Sun, Aug 31 - Thu, Sep 4
BOI
Boise
DEN
Denver
$106 Roundtrip, found 2 days ago
$106
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Sun, Aug 31 from Boise to Denver, returning Thu, Sep 4, priced at $106 found 2 days ago
Frontier Airlines
Fri, Sep 19 - Fri, Sep 26
BOI
Boise
DEN
Denver
$112 Roundtrip, found 7 hours ago
$112
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Fri, Sep 19 from Boise to Denver, returning Fri, Sep 26, priced at $112 found 7 hours ago
Frontier Airlines
Sun, Aug 31 - Sun, Sep 7
BOI
Boise
DEN
Denver
$118 Roundtrip, found 1 day ago
$118
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sun, Aug 31 from Boise to Denver, returning Sun, Sep 7, priced at $118 found 1 day ago
Frontier Airlines
Sun, Nov 9 - Thu, Nov 13
BOI
Boise
DEN
Denver
$119 Roundtrip, found 1 day ago
$119
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sun, Nov 9 from Boise to Denver, returning Thu, Nov 13, priced at $119 found 1 day ago
Southwest Airlines
Thu, Dec 4 - Sun, Dec 7
BOI
Boise
DEN
Denver
$133 Roundtrip, found 21 hours ago
$133
Roundtrip
found 21 hours ago
Select Southwest Airlines flight, departing Thu, Dec 4 from Boise to Denver, returning Sun, Dec 7, priced at $133 found 21 hours ago
Alaska Airlines
Wed, Oct 8 - Fri, Oct 10
BOI
Boise
DEN
Denver
$146 Roundtrip, found 7 hours ago
$146
Roundtrip
found 7 hours ago
Select Alaska Airlines flight, departing Wed, Oct 8 from Boise to Denver, returning Fri, Oct 10, priced at $146 found 7 hours ago
Hawaiian Airlines
Fri, Dec 5 - Tue, Dec 9
BOI
Boise
DEN
Denver
$176 Roundtrip, found 4 hours ago
$176
Roundtrip
found 4 hours ago
Select Hawaiian Airlines flight, departing Fri, Dec 5 from Boise to Denver, returning Tue, Dec 9, priced at $176 found 4 hours ago
United
Thu, Dec 4 - Mon, Dec 8
BOI
Boise
DEN
Denver
$177 Roundtrip, found 10 hours ago
$177
Roundtrip
found 10 hours ago
Select United flight, departing Thu, Dec 4 from Boise to Denver, returning Mon, Dec 8, priced at $177 found 10 hours ago

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

July is typically the cheapest month to fly

From $114 - $299 per traveler.

Graph displaying average flight prices per month

Alternative airports near Denver

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Denver Intl. DEN. Cheapest option available. Average driving time to city center is 32 minutes. Flights from $307
DEN
Denver Intl.
Cheapest
Average driving time to city center32 min
Flights from $307
Flights from Boise (BOI) to Denver (DEN)
Origin airport
Boise
Destination airport
Denver Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, Southwest Airlines, United
Roundtrip price
$90
Distance
647 mi
Average flight time
1 hour 56 mins

Boise to Denver Flights

The cheapest times to fly from Boise to Denver

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 Boise to Denver are during the month of September. You can find some of the cheapest flights from Boise to Denver with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Boise to Denver

Sunday is one of the best days to book for cheap flights from Boise to Denver: 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 Boise to Denver

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 Boise to Denver in 2025. You can also book with separate airlines for your outbound and return journeys, from $84 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 Boise to Denver 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 Boise to Denver 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 Boise Airport (BOI) to Denver Intl. Airport (DEN) cost?
Lock in a cheap one-way flight from $84 or cheap return flight from $90 from Boise Airport (BOI) to Denver Intl. Airport (DEN) 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 Boise Airport (BOI) to Denver Intl. Airport (DEN)?
The cheapest month to fly from BOI to DEN is September, when there's less demand. Off-peak season is typically when you'll find cheap fares for travel between these airports.
Which airlines fly direct from Boise Airport (BOI) to Denver Intl. Airport (DEN)?
Board a direct flight with United Airlines and journey straight from Boise Airport (BOI) to Denver Intl. Airport (DEN).
What is the cheapest airline that flies from Boise Airport (BOI) to Denver Intl. Airport (DEN)?
Southwest Airlines and United Airlines are some well-known airlines offering reasonable fares. Keep in mind that flight prices from Boise Airport (BOI) to Denver Intl. Airport (DEN) can vary depending on departure dates, demand and how early you book. With Expedia's filter tool, you can easily find a BOI to DEN flight that matches your preferences and budget.
How many flights per day from Boise Airport (BOI) to Denver Intl. Airport (DEN)?
Daily, an average of 7 direct flights take off from Boise Airport (BOI) to Denver Intl. Airport (DEN). Choose the departure date that fits your schedule best.
What are the most popular departure times for flights from Boise Airport (BOI) to Denver Intl. Airport (DEN)?
The 7 AM departures from BOI to DEN are the top choice for many travelers. Greater demand means you'll likely pay more for these departures. If you want to save money, pick a less crowded time to fly.
What day of the week has the most flights from BOI to DEN?
Depart on a Friday if you're after the best selection of flights from Boise Airport (BOI) to Denver Intl. Airport (DEN).
What is the earliest flight from Boise Airport (BOI) to Denver Intl. Airport (DEN)?
Boise Airport (BOI)'s first flight to Denver Intl. Airport (DEN) leaves at approximately 5:10AM UTC-7. With a total journey time of 2h, you'll touch down at around 7:10AM UTC-7.
How long does it take to fly from Boise Airport (BOI) to Denver Intl. Airport (DEN)?
Flights from BOI to DEN have an average travel time of 2 hours and 2 minutes. The total distance between the two is 650 mi.
What airline has the least delays from BOI to DEN?
Consider traveling with Southwest Airlines if you'd like to go straight from Boise Airport (BOI) to Denver Intl. Airport (DEN) without any holdups. This carrier has the strongest track record for punctuality, with an on-time score of 85%. Want to be notified if anything changes? You can keep an eye on your flight status using the Expedia App.
What is the best time to fly from Boise Airport (BOI) to Denver Intl. Airport (DEN)?
To avoid potential delays on the Boise Airport (BOI) to Denver Intl. Airport (DEN) route, travel before 3 PM. Departures after this hour 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 Denver from Boise Airport (BOI)?
Denver Intl. Airport (DEN) is the only airport in Denver with direct flights from Boise Airport (BOI). Browse the options and find affordable fares on Expedia.
Is it cheaper to buy a plane ticket from Boise Airport (BOI) to Denver Intl. Airport (DEN) last-minute?
Waiting until just before your trip to book your flight from BOI to DEN generally means paying more. While you might find some last-minute offers, there's no guarantee. Allow some flexibility in your schedule for a better chance of landing a bargain.
Is it cheaper to book a BOI to DEN flight and hotel package?
Securing a BOI to DEN flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Pick from our impressive range of stays and then add flights, car rentals and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Boise Airport (BOI) to Denver Intl. Airport (DEN)?
In most instances, you're able to cancel or reschedule your BOI to DEN flight. However, additional fees may apply, especially if you booked more than 24 hours ago. Check your itinerary for the airline's fees and rules on flight changes, or if you want further information, head to our Customer Service portal.

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*Available to One Key members.