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

Compare Boise to Denver International flight deals

Find the cheapest month or even day of the year to fly to Denver International

Book the best Denver International fare with no extra fees

Flight deals from Boise to Denver International

Looking for a cheap last-minute deal or the best return flight from Boise Airport to Denver International Airport? If you want to travel next month, return fares start from $158. Find the lowest prices on one-way and return tickets right here.
Denver.$158 per passenger.Departing Tue, 16 Jun, returning Tue, 23 Jun.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Boise on Tue, 16 Jun, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Tue, 23 Jun, arriving in Boise.Price includes taxes and charges.From $158, select.
Denver.$158 per passenger.Departing Tue, 18 Aug, returning Tue, 1 Sep.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Boise on Tue, 18 Aug, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Tue, 1 Sep, arriving in Boise.Price includes taxes and charges.From $158, select.
Denver.$159 per passenger.Departing Tue, 26 May, returning Tue, 23 Jun.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Boise on Tue, 26 May, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Tue, 23 Jun, arriving in Boise.Price includes taxes and charges.From $159, select.
Denver.$178 per passenger.Departing Tue, 26 May, returning Thu, 28 May.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Boise on Tue, 26 May, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Thu, 28 May, arriving in Boise.Price includes taxes and charges.From $178, select.
Denver.$261 per passenger.Departing Thu, 9 Jul, returning Thu, 16 Jul.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Boise on Thu, 9 Jul, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Thu, 16 Jul, arriving in Boise.Price includes taxes and charges.From $261, select.
Denver.$261 per passenger.Departing Thu, 13 Aug, returning Sun, 16 Aug.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Boise on Thu, 13 Aug, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Sun, 16 Aug, arriving in Boise.Price includes taxes and charges.From $261, select.
Denver.$282 per passenger.Departing Tue, 21 Jul, returning Tue, 4 Aug.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Boise on Tue, 21 Jul, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Tue, 4 Aug, arriving in Boise.Price includes taxes and charges.From $282, select.
Denver.$426 per passenger.Departing Tue, 27 Oct, returning Fri, 30 Oct.Return flight with United.Outbound direct flight with United departs from Boise on Tue, 27 Oct, arriving in Denver International.Inbound direct flight with United departs from Denver International on Fri, 30 Oct, arriving in Boise.Price includes taxes and charges.From $426, select.
Denver.$440 per passenger.Departing Sat, 19 Sep, returning Sun, 20 Sep.Return flight with United.Outbound direct flight with United departs from Boise on Sat, 19 Sep, arriving in Denver International.Inbound direct flight with United departs from Denver International on Sun, 20 Sep, arriving in Boise.Price includes taxes and charges.From $440, select.
Denver.$440 per passenger.Departing Mon, 1 Feb, returning Mon, 8 Feb.Return flight with United.Outbound direct flight with United departs from Boise on Mon, 1 Feb, arriving in Denver International.Inbound direct flight with United departs from Denver International on Mon, 8 Feb, arriving in Boise.Price includes taxes and charges.From $440, select.
Denver.$658 per passenger.Departing Sun, 10 May, returning Fri, 7 Aug.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Boise on Sun, 10 May, arriving in Denver International.Inbound direct flight with Southwest Airlines departs from Denver International on Fri, 7 Aug, arriving in Boise.Price includes taxes and charges.From $658, select.

Find the cheapest month to fly from Boise to Denver International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Boise to Denver International flights are currently cheapest in June.
May
from $178
Jun
from $158
Jul
from $261
Aug
from $261
Sep
from $440
Oct
from $426
Nov
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Dec
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Jan
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Feb
from $440
Mar
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Apr
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Direct flights from Boise to Denver International

Boise to Denver International: Alternative routes

Compare routes from Boise to Denver below. You may find an airport to fly into that's cheaper, faster, or easier than Denver International.

Denver Arapahoe Co

1km from central Denver
Closest
Search flights

Broomfield

23km from central Denver
Search flights

Denver International

30km from central Denver
Cheapest
from $158
Search flights

Northern Colorado Regional

79km from central Denver
Search flights

Boise to Denver: Flight information

The things to know before you go.
Cheapest flight found$158
Cheapest month to flyAugust
Average flight time1 hr, 59 mins
Most popular airlineSouthwest Airlines
Average flights per week128

Finding cheap flights from Boise to Denver International: Frequently asked questions

The best price we found for a return flight from Boise to Denver International is $158. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
1 hour and 59 minutes is the average flight time from Boise to Denver International.
Southwest Airlines, United and Air Canada fly direct from Boise to Denver International.
As of May 2026, there are 128 flights per week flying from Boise to Denver International.
The cheapest month to fly from Boise to Denver International is usually August.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Boise Airport to Denver International Airport on Tuesday, 18 August 2026.
Yes – the average flight time is 1 hour and 59 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Denver International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Denver is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Frontier Airlines offers the cheapest flight tickets to Denver International.

How to find cheap flights to Denver (DEN) from Boise (BOI) in 2024

Looking for cheap tickets from Boise to Denver International? Return tickets start from $158 and one-way flights to Denver International from Boise start from $130


Here are a few tips on how to secure the best flight price and make your journey as smooth as possible.

  • Simply hit 'search'. From British Airways to international carriers like Emirates, we compare all major airlines along with the most popular online travel agents to find the cheapest plane tickets.
  • Compare flight deals to Denver from Boise from over 1,000 providers. Then choose the cheapest or fastest plane tickets. Flight tickets to Denver start from $130 one-way.
  • Flex your dates to find the best BOI-DEN ticket prices. If you are flexible when it comes to your travel dates, use Skyscanner's 'Whole month' tool to find the cheapest month, and even day to fly to Denver International from Boise.
  • Set up a Price Alert. You can easily track the fare of your cheap flights by creating an alert. Whenever prices go down or up, you'll get an email or push notification to help make sure you get the best possible flight deal.
  • Fly without stops. Only interested in direct flights between Boise and Denver International? Make sure to tick 'Direct flights only' when performing a search. If there are direct flights available on the route, these will appear in the results. Airlines that fly direct include: Southwest Airlines
    United
    Air Canada
    Lufthansa
    SkyWest Airlines
    Copa
    SWISS
    Frontier Airlines
  • Find the cheapest Business class flights from Boise and Denver International. We scour the internet for the best Business, Premium Economy and First Class flight fares to Denver, too. Check the difference in price as you search – you might just chance upon a last-minute low fare. Note that not all cabin classes are available for every destination or airline.
  • Include nearby airports in your search. Widen your search for Boise to Denver International flight deals by selecting the "add nearby airports" option. This will allow you to see flight prices for all the nearest airports at your departure point and your destination and could help you save next time you travel.
  • Search for cheap flights regardless of where you are. To get the best flight booking experience when out and about, download the app and search for plane tickets between Boise and Denver International whenever you want.

Combine your flight to Denver International from Boise with hotels and car hire

Once you've secured your cheap flight ticket from Boise to Denver International, discover the best prices and exclusive rates for hotels in Denver or nearby. You can also compare hundreds of car hire companies in one go so that you get the best car hire price for your trip.


Prices shown on this page are estimated lowest prices only. Found in the last 45 days.