$89 Cheap United flights Boise (BOI) to Denver (DEN)

View $89 flight on Fri, Dec 12, 2025Opens in a new window

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$89 Cheap United flights Boise (BOI) to Denver (DEN)

Prices were available within the past 7 days and start at $89 for one-way flights and $177 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Fri, Dec 12 - Sun, Dec 14
BOI
Boise
DEN
Denver
$177 Roundtrip, found 6 hours ago
$177
Roundtrip
found 6 hours ago
Select United flight, departing Fri, Dec 12 from Boise to Denver, returning Sun, Dec 14, priced at $177 found 6 hours ago
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
Popular airline
Alaska Airlines
Distance
647 mi
Average flight time
1 hour 56 mins

Frequently asked questions

How much is a United Airlines flight from Boise Airport (BOI) to Denver Intl. Airport (DEN)?
Set the "Price (lowest to highest)" filter on Expedia to search for cheap United Airlines round-trip flights from $177 from BOI to DEN. Affordable one-way fares from $89 are also on offer.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from BOI to DEN with United Airlines?
United Airlines flights to Denver are often more affordable in the off-peak months of January and November. Whether you're in search of a return or one-way ticket, you could find a better deal then.
What is the cheapest time to book flights from Boise Airport (BOI) to Denver Intl. Airport (DEN) with United Airlines?
Look for cheap United Airlines flights from Boise Airport (BOI) to Denver Intl. Airport (DEN) one to three months ahead of your departure day. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare type and itinerary, the ideal day to book a domestic flight is generally Sunday and the most expensive is typically Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Boise Airport (BOI) to Denver Intl. Airport (DEN)?
Hop on one of United Airlines's 35 direct weekly flights from Boise Airport (BOI) to Denver Intl. Airport (DEN). To see your choices, enter your dates, origin and destination and hit search. Then select the "Nonstop" and "Airline" filters.
How long does it take to fly from BOI to DEN with United Airlines?
The travel time for a nonstop United Airlines flight from Boise Airport (BOI) to Denver Intl. Airport (DEN) typically takes 2h 3m.
Which day of the week has the most United Airlines flights from Boise Airport (BOI) to Denver Intl. Airport (DEN)?
If it's flexibility you're after, Thursday offers the most choice for United Airlines flights from Boise Airport (BOI) to Denver Intl. Airport (DEN). You can select from 5 different departures.
What is the earliest United Airlines flight from BOI to DEN?
Jetting off from BOI at 7:00AM UTC-7, the first United Airlines flight to DEN arrives at 9:00AM UTC-7. Flying earlier in the day means you'll be less likely to encounter cancellations or delays.* Not an early riser? The last United Airlines flight from BOI to DEN departs at 5:37PM UTC-7 and touches down at 7:36PM UTC-7.*Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Denver?
Take a United Airlines flight from Boise Airport (BOI) to Denver, and you'll likely come in to Denver Intl. Airport (DEN). This is the airline's main hub in this destination.
Why fly with United Airlines from BOI to DEN?
A rewarding loyalty program and the opportunity to collect points through United Mileage Plus are the start of the reasons to travel from BOI to DEN with United Airlines. Plus, when you join our One Key™ program, you can earn OneKeyCash™* in addition to any airline loyalty program earnings. It's yours to spend on your next adventure.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
What type of plane does United Airlines fly from Boise Airport (BOI) to Denver Intl. Airport (DEN)?
You'll likely be on a Boeing 737-900 or an Airbus A319 when flying United Airlines from Boise Airport (BOI) to Denver Intl. Airport (DEN). However, keep in mind that a different aircraft could be assigned to your route depending on operational factors.
Can I change or cancel my United Airlines flight from Boise Airport (BOI) to Denver Intl. Airport (DEN)?
Depending on the type of ticket you purchased, a fee typically applies if you cancel or change your booking more than 24 hours after confirmation. To find flexible plane tickets, select our "Changes included" or "No cancel fee" filter while searching for flights. For additional information on canceling or modifying your reservation, go to "Trips," select your flight and click on "Manage Booking."

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