$51 Cheap Flights from Denver (DEN) to Boise (BOI)

View $51 flight on Tue, Aug 18, 2026Opens in a new window

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

Cheap Flights from Denver to Boise (DEN-BOI)

Prices were available within the past 7 days and start at $51 for one-way flights and $142 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, Aug 13 - Thu, Aug 20
DEN
Denver
BOI
Boise
$142 Roundtrip, found 6 hours ago
$142
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Thu, Aug 13 from Denver to Boise, returning Thu, Aug 20, priced at $142 found 6 hours ago
Southwest Airlines
Tue, Sep 15 - Tue, Sep 22
DEN
Denver
BOI
Boise
$147 Roundtrip, found 11 hours ago
$147
Roundtrip
found 11 hours ago
Select Southwest Airlines flight, departing Tue, Sep 15 from Denver to Boise, returning Tue, Sep 22, priced at $147 found 11 hours ago
Frontier Airlines
Thu, Aug 27 - Tue, Sep 8
DEN
Denver
BOI
Boise
$147 Roundtrip, found 6 hours ago
$147
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Thu, Aug 27 from Denver to Boise, returning Tue, Sep 8, priced at $147 found 6 hours ago
Frontier Airlines
Tue, Jun 23 - Tue, Jun 30
DEN
Denver
BOI
Boise
$148 Roundtrip, found 1 day ago
$148
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Tue, Jun 23 from Denver to Boise, returning Tue, Jun 30, priced at $148 found 1 day ago
Delta
Tue, Sep 15 - Tue, Sep 22
DEN
Denver
BOI
Boise
$156 Roundtrip, found 11 hours ago
$156
Roundtrip
found 11 hours ago
Select Delta flight, departing Tue, Sep 15 from Denver to Boise, returning Tue, Sep 22, priced at $156 found 11 hours ago
Southwest Airlines
Tue, Sep 15 - Tue, Sep 22
DEN
Denver
BOI
Boise
$156 Roundtrip, found 11 hours ago
$156
Roundtrip
found 11 hours ago
Select Southwest Airlines flight, departing Tue, Sep 15 from Denver to Boise, returning Tue, Sep 22, priced at $156 found 11 hours ago
Frontier Airlines
Tue, Aug 25 - Sun, Aug 30
DEN
Denver
BOI
Boise
$158 Roundtrip, found 5 days ago
$158
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Tue, Aug 25 from Denver to Boise, returning Sun, Aug 30, priced at $158 found 5 days ago
Southwest Airlines
Tue, Sep 15 - Tue, Sep 22
DEN
Denver
BOI
Boise
$162 Roundtrip, found 11 hours ago
$162
Roundtrip
found 11 hours ago
Select Southwest Airlines flight, departing Tue, Sep 15 from Denver to Boise, returning Tue, Sep 22, priced at $162 found 11 hours ago
Alaska Airlines
Tue, Sep 15 - Tue, Sep 22
DEN
Denver
BOI
Boise
$190 Roundtrip, found 11 hours ago
$190
Roundtrip
found 11 hours ago
Select Alaska Airlines flight, departing Tue, Sep 15 from Denver to Boise, returning Tue, Sep 22, priced at $190 found 11 hours ago
American Airlines
Tue, Aug 4 - Wed, Aug 12
DEN
Denver
BOI
Boise
$211 Roundtrip, found 8 hours ago
$211
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Tue, Aug 4 from Denver to Boise, returning Wed, Aug 12, priced at $211 found 8 hours ago

Alternative airports near Boise

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

Select flight to Boise Airport BOI. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $293
BOI
Boise Airport
CheapestClosest
Average driving time to city center8 min
Flights from $293

What you need to know for your flight from Denver Intl. to Boise

Denver (DEN) to Boise (BOI) at a glance

Explore a range of airlines providing service on the domestic short-haul route from Denver (DEN) to Boise (BOI). You can compare options from both full-service and low-cost carriers to discover the best itinerary that suits your budget, schedule, and travel plans. As you prepare for your trip, check out the key details for flights from Denver International Airport to Boise Airport and take advantage of cheap fares from Denver while you enjoy the sights and neighborhoods of Boise.

  • Fastest flight duration: around 2 hours non-stop
  • Route distance: roughly 600 miles (970 km)
  • Flights per week: around 25+ flights with multiple daily departures on average
  • Typical fares (one-way): economy tickets often range from $50–$345, depending on seasonality and how far ahead you book

Flights from Denver International Airport (DEN) to Boise Airport (BOI)

Based on the latest traveler bookings, here are the top airlines favored by passengers flying from Denver (DEN) to Boise (BOI), particularly for non-stop and one-stop flights. Common layover hubs include Salt Lake City International Airport (SLC) with an average layover of about 1 hour and 15 minutes, Seattle-Tacoma International Airport (SEA) at approximately 1 hour and 45 minutes, and Portland International Airport (PDX) with a 1-hour layover. This variety allows you to balance price, total travel time, and cabin class for the ideal itinerary.

  • United: This comprehensive airline provides non-stop flights, with one-way prices generally falling between $100 and $365. United is responsible for around 56% of all departures on this route, boasting a total travel duration of 2 hours.
  • Southwest Airlines: Known for its budget-friendly fares, Southwest offers both non-stop and one-stop services, with one-way rates typically ranging from $80 to $355. It accounts for roughly 30% of departures on this route, with a direct flight time of 2 hours.
  • Frontier Airlines: As a low-cost option, Frontier provides non-stop service with one-way ticket prices usually between $50 and $205. It makes up about 7% of the flights on this route, and the overall journey lasts 2 hours.
  • Alaska Airlines: This full-service carrier features one-stop flights, with one-way fares commonly between $90 and $295. Alaska Airlines contributes approximately 4% of departures on this route, with an in-flight duration of 4 hours and a total travel time of around 5h 15m, including layover.
  • Delta: Offering one-stop service, Delta is a full-service airline with one-way fares generally priced from $90 to $425. It accounts for about 3% of departures for this route, featuring a flight time of 4 hours and a total journey time of approximately 5h 15m, including any layover.

Travelers flying from Denver to Boise can opt for an upgrade, as United provides first-class service on this route for a more comfortable journey.

Best time to fly from Denver (DEN) to Boise (BOI)

The most popular months for travelers flying from Denver to Boise are March, June, and July, when peak temperatures in Boise reach up to 78.1°F in July. If you prefer quieter travel, consider October, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 51.8°F. For better deals, May usually offers the lowest average one-way fare around $162. Flight availability peaks in July, with approximately 31 flights per week, making it easier to find convenient departure times. January has the fewest flights, with approximately 18 flights per week.

  • Cheapest time to fly: May usually offers good deals with average one-way fare around $162, roughly 10% cheaper than the yearly average.
  • More budget-friendly months to fly: October, September, and August typically offer average one-way fares of around $168.
  • Most flight options: July has the highest number of flights from Denver to Boise, with approximately 31 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January29.5°F (-1.4°C)Slightly Low18$177
February33.8°F (1.0°C)Average21$182
March41.7°F (5.4°C)Slightly High22$201
April48.6°F (9.2°C)Average20$196
May57.7°F (14.3°C)Average29$162
June67.1°F (19.5°C)Slightly High30$174
July78.1°F (25.6°C)Slightly High31$174
August76.1°F (24.5°C)Average28$172
September66.4°F (19.1°C)Average28$164
October51.8°F (11.0°C)Slightly Low29$163
November38.7°F (3.7°C)Average29$214
December29.5°F (-1.4°C)Slightly Low28$182

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative routes from Denver (DEN) to Boise (BOI)

  • Denver to Boise (APA-BOI): Centennial Airport (APA) is located approximately 21 miles from Denver International Airport (DEN).
  • Denver to Ontario (DEN-ONO): Ontario Municipal Airport (ONO) is situated about 55 miles from Boise Airport (BOI).

How to find the best prices for flights from Denver (DEN) to Boise (BOI)

Getting some of the best deals on flights from Denver to Boise is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are usually found when booking 2 to 8 weeks in advance, which aligns with when most travelers make their reservations. Morning departures between 5 a.m. and 12 p.m. tend to offer lower prices and are the most popular flight times, while flying on Thursday not only provides cheaper rates but is also the favored travel day.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.*
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Boise Airport from Denver International Airport

Boise welcomes travelers from Denver with a range of transport options based on price, convenience, and proximity. Here's how to reach Boise efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in Boise, with private rides that can be arranged in advance.
  • Car rental: Renting a car from Boise Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Boise Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From Boise Airport, Boise Station, a train station, is located about 2.4 miles away by car, while Boise Bus Station, a bus station, is situated approximately 3.8 miles from the airport, also accessible by car.

Frequently asked questions

How much does a flight from Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI) cost?
You can find cheap one-way flights from $51 and cheap return flights from $142 Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI) with Expedia. One-way flights generally range between $149 and $917, and roundtrip flights usually range from $274 to $951. 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 the cheapest fares first, and use the Price Tracking tool to receive alerts when Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI)?
April is the cheapest month to fly from Denver, CO (DEN) to Boise, ID (BOI), with average return fares around $267. This is about 17% lower than the average price throughout the year, as demand tends to be lower in the spring. Other affordable months to consider are February and August.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI)?
There are 2 airlines offering direct flights from DEN to BOI:

  • United operates around 44 direct flights from DEN to BOI every week
  • Frontier Airlines operates around 7 direct flights from DEN to BOI every week

What is the cheapest airline that flies from Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI)?
Delta is one of the cheapest airlines offering connecting flights from Denver Intl. (DEN) to an unspecified destination in Boise (BOI), with round-trip tickets starting from around $202. This flight includes a layover in an unspecified location. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
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, WN offers early morning flights. If price is the most important factor, Frontier Airlines typically offers the lowest fares. Alaska Airlines offers the most daily flights from Denver to Boise, 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-Denver Intl.) to Boise, ID (BOI)?
For flights from Denver, CO (DEN) to Boise, ID (BOI), the best times to travel are in April and August. During these months, you can find return flights for about $267, making them both affordable and popular. April offers mild spring weather, while August allows you to enjoy the summer before the crowds thin out.*Prices based on flights available on Expedia in the last year.
How many flights per day from Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI)?
You can find approximately 10 nonstop flights per day from Denver Intl. (DEN) to (BOI). For more options, look at flights that include layovers.
What is the earliest flight from Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from DEN to BOI. To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
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. This accounts for around 30% of total traffic. Many major carriers, including United Airlines, Alaska Airlines and Southwest Airlines, offer flights during this window. Many travelers prefer this time because it allows for a full day of activities upon arrival in Boise.
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 648 miles. 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 first class between DEN and BOI. First class cabins are available on:

  • Delta Air Lines
  • American Airlines
  • United Airlines

How much is a business class flight from Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI)?
A direct, return business class ticket from Denver, CO (DEN) to Boise, ID (BOI) typically costs between $990 - $1,410. there is no data available for one-way flights. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI) if you opt for a connecting flight.*Prices based on flights available on Expedia in the last year.
How do I earn miles on a Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI) flight with Expedia?
It's easy to earn miles on a Denver, CO (DEN-Denver Intl.) 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-Denver Intl.) to Boise, ID (BOI) at the last minute?
Typically, booking a last minute flight from Denver, CO (DEN-Denver Intl.) 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-Denver Intl.) to Boise, ID (BOI) flight and hotel package?
Securing a Denver, CO (DEN-Denver Intl.) to Boise, ID (BOI) Boise Vacation Packages 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, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Roundtrip price
$142
Distance
647 mi
Average flight time
1 hour 59 mins

Book with confidence

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 August. 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 2026. You can also book with separate airlines for your outbound and return journeys, from $51 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.

 

Denver to Boise Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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