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Cheap Flights from Boise to Denver International

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 R 2,289. Find the lowest prices on one-way and return tickets right here.
Denver.R 1,040 per passenger.Departing Tue, 6 Oct.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Boise on Tue, 6 Oct, arriving in Denver International.Price includes taxes and charges.From R 1,040, select.
Denver.R 1,260 per passenger.Departing Tue, 22 Sep.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Boise on Tue, 22 Sep, arriving in Denver International.Price includes taxes and charges.From R 1,260, select.
Denver.R 1,541 per passenger.Departing Thu, 13 Aug.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Boise on Thu, 13 Aug, arriving in Denver International.Price includes taxes and charges.From R 1,541, select.
Denver.R 1,985 per passenger.Departing Sat, 25 Jul.One-way flight with United.Outbound direct flight with United departs from Boise on Sat, 25 Jul, arriving in Denver International.Price includes taxes and charges.From R 1,985, select.
Denver.R 1,994 per passenger.Departing Sat, 14 Nov.One-way flight with United.Outbound direct flight with United departs from Boise on Sat, 14 Nov, arriving in Denver International.Price includes taxes and charges.From R 1,994, select.
Denver.R 1,995 per passenger.Departing Sat, 5 Dec.One-way flight with United.Outbound direct flight with United departs from Boise on Sat, 5 Dec, arriving in Denver International.Price includes taxes and charges.From R 1,995, select.
Denver.R 2,409 per passenger.Departing Fri, 1 Jan.One-way flight with United.Outbound direct flight with United departs from Boise on Fri, 1 Jan, arriving in Denver International.Price includes taxes and charges.From R 2,409, select.
Denver.R 2,429 per passenger.Departing Sat, 6 Feb.One-way flight with United.Outbound direct flight with United departs from Boise on Sat, 6 Feb, arriving in Denver International.Price includes taxes and charges.From R 2,429, 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 October.
Jul
from R 1,985
Aug
from R 1,541
Sep
from R 1,260
Oct
from R 1,040
Nov
from R 1,994
Dec
from R 1,995
Jan
from R 2,409
Feb
from R 2,429
Mar
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Apr
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May
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Jun
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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 International

30km from central Denver
ClosestCheapest
from R 1,039
Search flights

Boise to Denver: Flight information

The things to know before you go.
Cheapest flight foundR 1,039
Cheapest month to flyOctober
Average flight time1 hr, 57 mins
Most popular airlineSouthwest Airlines
Average flights per week148

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 R 2,289. 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 57 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 July 2026, there are 148 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, 4 August 2026.
Yes – the average flight time is 1 hour and 57 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.

Travelling from Boise Airport (BOI) to Denver International Airport (DEN): what you need to know

  • The average length of a direct flight from Boise Airport to Denver International Airport is 1 hour 55 minutes.

  • Denver's timezone is UTC-7, which is the same as Boise.

  • Every week, there are 49 Boise Airport to Denver International Airport flights. If you prefer to be on board as soon as possible, go for the 05:00 United Airlines flight. If you'd rather make the most of your time before flying, the last departure is at 17:50 with Southwest Airlines.

  • Give yourself plenty of time to make your BOI to DEN flight. It's generally best to arrive two hours before international departures and an hour ahead for domestic flights.

  • Travelling during a peak time such as October? School holidays and other popular seasons can lead to longer lines and delays at check-in and security. Be extra cautious and get there up to four hours before international flights and two hours before domestic departures.

  • You can fly nonstop to Denver, the United States. Take off with one of these airlines that offer direct flights from Boise Airport to Denver International Airport:

  • Most passengers choose to fly with United on this route.

  • With a reliable 84.84% of services arriving as planned, United has the best on-time performance for BOI to DEN flights.

  • If you'd like to split up your journey, simply deselect 'Direct flights only' when searching for your ticket from Boise Airport to Denver International Airport. Here are the most popular stopovers between BOI and DEN:

    • Phoenix Sky Harbour Airport

    • Harry Reid International Airport

    • Salt Lake City Airport

Handy information about Boise Airport (BOI)

  • You'll find BOI at 3201 Airport Way.

  • Boise Airport gets high marks for its on-time performance. 84% of flights that depart BOI arrive at their destination on time.

  • Central Boise to Boise Airport is around 6 kilometres. Depending on traffic, it'll take about 15 minutes to get there if you're catching a taxi, ride-sharing or driving.

  • Planning to take public transport? You can expect a journey time of around 30 minutes.

  • Looking for a convenient hotel close to BOI? If you're boarding an early flight from Boise Airport to Denver International Airport, these stays will have you moments from your departure lounge:

Arriving at Denver International Airport (DEN)

  • Hop off your Boise Airport to Denver International Airport flight and jump into your hotel bed shortly after. If you're looking for a handy option that's not too far from DEN, stay at Baymont by Wyndham Denver International Airport.

  • Grab a Denver International Airport rental car and explore Denver and beyond with your own wheels. Routes Car Rentals, Dollar and Budget are well-known companies you can book with here.

  • Reserving your ride from Denver International Airport around one week ahead increases your chances of getting a good deal.

Getting from Denver International Airport (DEN) to central Denver

  • DEN is located at 8500 Pena Boulevard.

  • From Denver International Airport, Denver is approximately 40 kilometres away. It takes around 35 minutes to drive to the centre.

  • It takes roughly 35 minutes if you're travelling on public transport.

When to fly to Denver International Airport (DEN)

  • July is the most popular month for flights from Boise Airport to Denver International Airport. To escape the crowds, go to Denver in January.

  • The warmest month in Denver is July, with the temperature ranging between 14ºC (57ºF) and 32ºC (90ºF). Book your flights from Boise Airport to Denver International Airport in this month if this is the type of weather you like.

  • Look for cheap tickets from BOI to DEN in January if you like cooler conditions. Temperatures are at their lowest then, ranging between -9ºC (16ºF) and 7ºC (45ºF) on average.

Explore more of the United States

  • Denver is always a good idea, but there are so many other corners of the United States you should also see. Around 105 kilometres south of Denver, a trip to Colorado Springs will keep you busy. Start with popular sights like Garden of the Gods, Pikes Peak Region Attractions and Red Rock Canyon.

  • If you're looking to explore another well-known destination in the United States, consider Aurora, roughly 13 kilometres east of Denver. Plains Conservation Centre, DeLaney Homestead Historic District and Aircraft viewing are among the biggest draws.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.