Boise (BOI) to Denver (DEN)
Flight time
≈ 2h 06m
Bearing
109° E
Boise (BOI) to Denver (DEN) is 648 miles (1,042 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies BOI–DEN
Filed traffic dataIn May 2026, Southwest Airlines operated the most departures, one of 4 carriers flying nonstop BOI–DEN; the Embraer E175 was the most common aircraft at 25% of departures; flights ran 88% full.
Departures
523
May 2026
Seats
73,035
both directions
Passengers
64,490
both directions
Load factor
88.3%
RPM ÷ ASM
Who flies BOI–DEN?
Southwest Airlines operated the most nonstop BOI–DEN departures in May 2026 (193), one of 4 carriers on the route.
- WN
193 departures · 30,507 seats
Share of departures36.9%90.5%
Load
- UA
163 departures · 27,652 seats
Share of departures31.2%89.7%
Load
- OO
149 departures · 10,676 seats
Share of departures28.5%87.5%
Load
- F9
18 departures · 4,200 seats
Share of departures3.4%65.7%
Load
What plane flies BOI–DEN?
In May 2026, the Embraer E175 flew 25% of BOI–DEN departures — more than any other aircraft type.
- Embraer E175
132 departures · 86.8% load
25.2% - Boeing 737-900ER
94 departures · 91.3% load
18.0% - Boeing 737-700
86 departures · 94.0% load
16.4% - Boeing 737 MAX 8
77 departures · 87.2% load
14.7% - Boeing 737-800
56 departures · 87.7% load
10.7% - Airbus A320
19 departures · 91.5% load
3.6% - Bombardier CRJ-700
15 departures · 92.2% load
2.9% - Airbus A321
12 departures · 66.8% load
2.3% - Airbus A319
12 departures · 86.6% load
2.3% - Boeing 737 MAX 9
12 departures · 88.1% load
2.3% - Airbus A321neo
6 departures · 63.7% load
1.1% - Embraer E170
2 departures · 96.4% load
0.4%
How has BOI–DEN traffic changed?
Nonstop BOI–DEN departures rose from 511 in June 2025 to 523 in May 2026.
Monthly nonstop BOI–DEN traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
June 2025
511 departures · 69,521 passengers
88.5%
Load
July 2025
522 departures · 69,021 passengers
87.4%
Load
August 2025
522 departures · 65,103 passengers
85.3%
Load
September 2025
505 departures · 60,764 passengers
86.8%
Load
October 2025
522 departures · 61,717 passengers
88.1%
Load
November 2025
490 departures · 54,619 passengers
82.9%
Load
December 2025
523 departures · 57,602 passengers
82.0%
Load
January 2026
522 departures · 51,094 passengers
72.4%
Load
February 2026
472 departures · 49,589 passengers
78.4%
Load
March 2026
512 departures · 58,389 passengers
86.3%
Load
April 2026
498 departures · 53,498 passengers
84.2%
Load
May 2026
523 departures · 64,490 passengers
88.3%
Load
By direction
Each direction is filed separately — they rarely match.
DEN → BOI
89.1% full
262 departures · 33,238 passengers
BOI → DEN
87.5% full
261 departures · 31,252 passengers
Nonstop BOI–DEN traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through May 2026; filings from 2025. Public domain (US Government work).
The airports
Frequently asked
How far is Boise (BOI) from Denver (DEN)?
BOI to DEN is 648 miles (1,042 km / 563 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from BOI to DEN?
A nonstop covers the 648-mile great-circle distance in roughly 2h 06m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies BOI–DEN?
In May 2026, the Embraer E175 flew the largest share of departures (25.2%), followed by the Boeing 737-900ER (18.0%).
What mileage do I earn flying BOI–DEN?
Distance-based programs credit off the 648-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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