$105 Cheap Delta flights Boise (BOI) to Denver (DEN)

Apply the “Price (lowest to highest)” filter on Expedia to search for cheap Delta Air Lines round-trip flights from $174 from BOI to DEN. Affordable one-way tickets from $105 are also available.**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.

January is one of the cheapest months to travel to Denver with Delta Air Lines. You could also find great deals on one-way and round-trip fares in November.

Search for affordable Delta Air Lines flights from Boise Airport (BOI) to Denver Intl. Airport (DEN) one to three months prior to your departure date. 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. Regardless of fare class and itinerary, the best day to book a domestic flight is usually Sunday and the most expensive tends to be 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.

Select our “Nonstop” filter when searching for direct Delta Air Lines flights from BOI to DEN. You’ll also be able to compare other carriers servicing the same nonstop journey.

To find the earliest departure from BOI to DEN with Delta Air Lines, filter your results by “Early Morning” and “Morning.” Booking an early flight usually means you’ll experience fewer cancellations.**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.

Catch a Delta Air Lines flight from Boise Airport (BOI) to Denver, and you’re most likely to land at Denver Intl. Airport (DEN). This is the airline’s primary hub here.

Heading from BOI to DEN with Delta Air Lines comes with a variety of perks, including an excellent in-flight experience and a rewarding loyalty program. Plus, when booking through Expedia, One Key™ members can earn OneKeyCash™* to use on select future travel purchases. That’s on top of the Delta SkyMiles points you can earn with Delta Air Lines.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

It’s generally possible to reschedule or cancel your flight, although there may be additional charges if you made your booking more than 24 hours ago. Need flexible options? Use Expedia’s “No cancel fee” and “Changes included” filters to find flights that won’t charge you extra if you have to adjust your plans. To modify your booking, head to “Trips,” select your flight and click on “Manage Booking” for further information.