Cheap Flights from Boise ID to Denver International CO from $58

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Flight deals from Boise to Denver International

Looking for a cheap last-minute deal or the best round-trip flight from Boise to Denver International? Find the lowest prices on one-way and round-trip tickets right here.

Denver.$58 per passenger.Departing Thu, Feb 12, returning Sun, Feb 15.Round-trip flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departing from Boise on Thu, Feb 12, arriving in Denver International.Inbound direct flight with Frontier Airlines departing from Denver International on Sun, Feb 15, arriving in Boise.Price includes taxes and charges.From $58, select.

Denver.$108 per passenger.Departing Fri, Jan 30, returning Mon, Feb 2.Round-trip flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departing from Boise on Fri, Jan 30, arriving in Denver International.Inbound direct flight with Frontier Airlines departing from Denver International on Mon, Feb 2, arriving in Boise.Price includes taxes and charges.From $108, select.

Denver.$132 per passenger.Departing Thu, Jan 15, returning Thu, Jan 29.Round-trip flight with Frontier Airlines and Alaska Airlines.Outbound indirect flight with Frontier Airlines, departing from Boise on Thu, Jan 15, arriving in Denver International.Inbound indirect flight with Alaska Airlines, departing from Denver International on Thu, Jan 29, arriving in Boise.Price includes taxes and charges.From $132, select.

Denver.$134 per passenger.Departing Thu, Mar 5, returning Mon, Mar 9.Round-trip flight with Frontier Airlines and Alaska Airlines.Outbound indirect flight with Frontier Airlines, departing from Boise on Thu, Mar 5, arriving in Denver International.Inbound indirect flight with Alaska Airlines, departing from Denver International on Mon, Mar 9, arriving in Boise.Price includes taxes and charges.From $134, select.

Denver.$152 per passenger.Departing Fri, Jan 23, returning Mon, Jan 26.Round-trip flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departing from Boise on Fri, Jan 23, arriving in Denver International.Inbound direct flight with Frontier Airlines departing from Denver International on Mon, Jan 26, arriving in Boise.Price includes taxes and charges.From $152, select.

Denver.$163 per passenger.Departing Thu, Mar 5, returning Mon, Mar 9.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Boise on Thu, Mar 5, arriving in Denver International.Inbound direct flight with Southwest Airlines departing from Denver International on Mon, Mar 9, arriving in Boise.Price includes taxes and charges.From $163, select.

Denver.$226 per passenger.Departing Fri, May 8, returning Tue, May 12.Round-trip flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departing from Boise on Fri, May 8, arriving in Denver International.Inbound indirect flight with Alaska Airlines, departing from Denver International on Tue, May 12, arriving in Boise.Price includes taxes and charges.From $226, select.

Denver.$236 per passenger.Departing Tue, Apr 7, returning Fri, Apr 10.Round-trip flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departing from Boise on Tue, Apr 7, arriving in Denver International.Inbound indirect flight with Alaska Airlines, departing from Denver International on Fri, Apr 10, arriving in Boise.Price includes taxes and charges.From $236, 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 February.

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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.

Boise to Denver: Flight information

The things to know before you go.

Cheapest flight found	$58
Cheapest month to fly	February
Average flight time	2 hrs, 2 mins
Most popular airline	Southwest Airlines
Average flights per week	133

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

How much are round-trip flights from Boise to Denver International?

The best price we found for a round-trip flight from Boise to Denver International is $58. 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.

How long does it take to fly from Boise to Denver International?

2 hours and 2 minutes is the average flight time from Boise to Denver International.

Which airlines fly direct from Boise to Denver International?

Southwest Airlines, United and SkyWest Airlines fly direct from Boise to Denver International.

How many flights are there a week from Boise to Denver International?

There are 133 flights per week flying from Boise to Denver International, as of January 2026.

When is the cheapest time to fly from Boise to Denver International?

The cheapest month to fly from Boise to Denver International is usually February.

Which upcoming date is cheapest to fly from Boise Airport to Denver International Airport on?

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 Thursday, February 12, 2026.

Can I get a direct flight from Boise Airport to Denver International Airport?

Yes – the average flight time is 2 hours and 2 minutes.

How can I find the best flight deal to Denver International?

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.

When is the best time to book flights to Denver?

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.

Which is the cheapest airline to fly with from Boise Airport to Denver International?

Currently, Frontier Airlines offers the cheapest flight tickets to Denver International.

Traveling from Boise Air Terminal (Gowen Field) Airport (BOI) to Denver International Airport (DEN): what you need to know

Around 1 hour 55 minutes is how long you can expect to be in the air on a direct flight from Boise Air Terminal (Gowen Field) Airport to Denver International Airport.
Boise and Denver share the same timezone, UTC-6.
Flights from BOI to DEN start at 05:00 — the earliest with United Airlines. The last service of the day is at 20:15 with United Airlines. Overall, you can choose from 66 weekly Boise Air Terminal (Gowen Field) Airport to Denver International Airport flights.
Get to the airport on time so you don't miss your BOI to DEN flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid any last-minute rush.
During popular months like July, it's best to get to the airport earlier. Arrive two hours before a domestic departure and four hours ahead of an international flight when you travel during a peak period in general.
Traveling to Denver (and then discovering more of United States!) is a breeze with United Airlines. This popular airline has direct flights from Boise Air Terminal (Gowen Field) Airport to Denver International Airport.
The majority of travelers choose to fly with United Airlines on this route.
United Airlines is the most punctual carrier offering BOI to DEN flights. An exceptional 87.92% of its services on this route arrive on time.
Think about adding a stopover when booking your ticket from Boise Air Terminal (Gowen Field) Airport to Denver International Airport. Just uncheck 'Direct flights only' to break up your journey, or perhaps see a new city along the way. Here's where you can stop between BOI and DEN:
- Salt Lake City International Airport
- Sacramento International Airport
- Phoenix Sky Harbor International Airport

How to find the cheapest flights from Boise Air Terminal (Gowen Field) Airport (BOI) to Denver International Airport (DEN)

The cheapest price we've found for a one-way Boise Air Terminal (Gowen Field) Airport to Denver International Airport flight is $29. A return ticket is currently $58. Depending on the availability when you book, these fares could change.
Get cheap tickets from BOI to DEN by booking seven months ahead. Based on our research, that's the sweet spot for landing a bargain.
June is the cheapest month for flights from Boise Air Terminal (Gowen Field) Airport to Denver International Airport. If you prefer to travel at a different time of year, the 'Whole month' tool will give you the lowest prices for each month.
Finding cheap flights from BOI to DEN is easy with Price Alerts. Simply create one of these automatic alerts and we'll let you know as soon as there's a better deal.
Tailor your flights with filters. Select your ideal departure and arrival times, total journey duration and airlines. You can also sort the results by 'Best,' 'Cheapest' or 'Fastest' flights from Boise Air Terminal (Gowen Field) Airport to Denver International Airport.

Handy information about Boise Air Terminal (Gowen Field) Airport (BOI)

BOI is located at 3201 Airport Way.
Boise Air Terminal (Gowen Field) Airport gets high marks for its on-time performance. 83.53% of flights that take off from BOI arrive at their destination on time.
To get to Boise Air Terminal (Gowen Field) Airport from central Boise, it'll take around 20 minutes by car. Of course, this depends on traffic conditions. It's approximately 18 kilometers from the airport to the city center.
Taking public transport? Expect a journey time of around 1 hour 35 minutes.
Looking for a convenient hotel close to BOI? If you're boarding an early flight from Boise Air Terminal (Gowen Field) Airport to Denver International Airport, these stays will have you moments from your departure lounge:

Arriving at Denver International Airport (DEN)

Consider staying at Baymont by Wyndham Denver International Airport after your Boise Air Terminal (Gowen Field) Airport to Denver International Airport flight. It's only a short drive from DEN and a comfy option if you want to get some sleep right away.
Follow your own route with a Denver International Airport rental car. Pick up a set of wheels from Routes Car Rentals, Dollar or Budget and find adventure across Denver and beyond.
To secure the lowest price, reserve your vehicle from Denver International Airport around one week in advance.

Getting from Denver International Airport (DEN) to central Denver

DEN is located at 8500 Pena Boulevard.
Denver International Airport to central Denver has a drive time of around 35 minutes. It's approximately 40 kilometers away.
It'll take around 1 hour 30 minutes to get there by public transport.

When to fly to Denver International Airport (DEN)

July is the most popular month for flights from Boise Air Terminal (Gowen Field) Airport to Denver International Airport. For smaller crowds, travel to Denver in April.
Book your flight from Boise Air Terminal (Gowen Field) Airport to Denver International Airport for July if you want to explore Denver during its warmest month. You can expect temperatures of between 14ºC (57ºF) and 32ºC (90ºF).
If you like traveling in cooler conditions, look for a cheap ticket from BOI to DEN in January. Temperatures average between -9ºC (16ºF) and 7ºC (45ºF) then.

Explore more of United States

You've seen Denver, now it's time to discover other corners of United States. Journey around 105 kilometers south to Colorado Springs to check off its top sights. From US Northern Command (USNORTHCOM) / North American Aerospace Defense Command (NORAD) Headquarters to Cheyenne Mountain Air Force Station and National Strength and Conditioning Association (NSCA), there's plenty to keep you busy.
Around 13 kilometers east of Denver, Aurora is another essential stop in United States. Experience major highlights starting with Magellan's Travel Solutions and Gear, The Fairways at Lowry and Retired Enlisted Association Inc.