Direct (nonstop) flights from Denver to Boise
3 airlines fly nonstop from Denver International (DEN) to Boise Air Terminal (BOI). It's 649 miles (1,044 km), about 2h in the air. Operated by Frontier Airlines, United Airlines, Southwest Airlines.
Frontier Airlines
United Airlines
Southwest Airlines
Route data last updated: May 28, 2026
Airlines with non-stop flights
F9
Frontier Airlines
WN
Southwest Airlines
Alternative Routes
Other ways to fly from Denver to Boise with one stop · direct emits 120 kg CO₂ per passenger
Looking for the return flight?
BOI → DEN: Flights from Boise to DenverOther direct flights from Denver
Direct flights from Boise (BOI)
Frequently Asked Questions
How long is the direct flight from Denver to Boise?
A nonstop flight from Denver (DEN) to Boise (BOI) takes approximately 2 hours. The distance is 649 miles (1,044 km).
Which airlines fly nonstop from Denver to Boise?
3 airlines: Frontier Airlines, United Airlines, Southwest Airlines.
Is there a nonstop flight from Denver to Boise?
Yes. 3 airlines: Frontier Airlines, United Airlines, Southwest Airlines.
How far is Denver from Boise?
The flight distance from Denver to Boise is 649 miles (1,044 km), measured as the great-circle (shortest air) distance. That's roughly the same distance as the length of Italy.
What type of aircraft flies from Denver to Boise?
At 2h, this route typically uses narrow-body aircraft — Boeing 737 or Airbus A320. Varies by airline.
What is the carbon footprint of a flight from Denver to Boise?
Roughly 120 kg CO2 per passenger one-way. That's about the same as driving 600 km.
Is the return flight from Boise to Denver also nonstop?
Yes — nonstop flights run both ways. Flight time may differ slightly due to wind patterns.
When is the cheapest time to fly from Denver to Boise?
Midweek flights (Tue/Wed) outside holiday peaks are usually cheapest. 3-6 weeks ahead is a good window for this route. Use "Check Prices" above to compare.
How early should I arrive at Denver International for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.