Buffalo (BUF) to Denver (DEN)
Flight time
≈ 3h 31m
Bearing
270° W
Buffalo (BUF) to Denver (DEN) is 1,356 miles (2,182 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies BUF–DEN
Filed traffic dataIn July 2026, Southwest Airlines operated the most departures, one of 2 carriers flying nonstop BUF–DEN; the Boeing 737-800 was the most common aircraft at 62% of departures; flights ran 93% full.
Departures
139
July 2026
Seats
23,630
both directions
Passengers
21,919
both directions
Load factor
92.8%
RPM ÷ ASM
Who flies BUF–DEN?
Southwest Airlines operated the most nonstop BUF–DEN departures in July 2026 (76), one of 2 carriers on the route.
- WN
76 departures · 13,110 seats
Share of departures54.7%95.5%
Load
- UA
63 departures · 10,520 seats
Share of departures45.3%89.3%
Load
What plane flies BUF–DEN?
In July 2026, the Boeing 737-800 flew 62% of BUF–DEN departures — more than any other aircraft type.
- Boeing 737-800
86 departures · 91.9% load
61.9% - Boeing 737 MAX 8
43 departures · 94.6% load
30.9% - Boeing 737-700
5 departures · 98.1% load
3.6% - Boeing 737-900ER
4 departures · 84.8% load
2.9% - Boeing 757-200
1 departures · 100.0% load
0.7%
How has BUF–DEN traffic changed?
Nonstop BUF–DEN departures fell from 161 in August 2025 to 139 in July 2026.
Monthly nonstop BUF–DEN traffic, trailing 12 months through July 2026. Bars scale to the busiest month; months with no filed service show as zero.
August 2025
161 departures · 25,418 passengers
87.9%
Load
September 2025
154 departures · 23,344 passengers
83.8%
Load
October 2025
141 departures · 21,418 passengers
85.1%
Load
November 2025
104 departures · 13,375 passengers
76.1%
Load
December 2025
39 departures · 5,565 passengers
83.0%
Load
January 2026
30 departures · 4,304 passengers
78.8%
Load
February 2026
73 departures · 9,081 passengers
75.0%
Load
March 2026
66 departures · 8,953 passengers
81.8%
Load
April 2026
66 departures · 8,774 passengers
77.6%
Load
May 2026
72 departures · 9,828 passengers
85.0%
Load
June 2026
130 departures · 19,661 passengers
89.2%
Load
July 2026
139 departures · 21,919 passengers
92.8%
Load
By direction
Each direction is filed separately — they rarely match.
DEN → BUF
89.7% full
70 departures · 10,623 passengers
BUF → DEN
95.9% full
69 departures · 11,296 passengers
Nonstop BUF–DEN traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through July 2026; filings from 2025. Public domain (US Government work).
The airports
Frequently asked
How far is Buffalo (BUF) from Denver (DEN)?
BUF to DEN is 1,356 miles (2,182 km / 1,178 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from BUF to DEN?
A nonstop covers the 1,356-mile great-circle distance in roughly 3h 31m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies BUF–DEN?
In July 2026, the Boeing 737-800 flew the largest share of departures (61.9%), followed by the Boeing 737 MAX 8 (30.9%).
What mileage do I earn flying BUF–DEN?
Distance-based programs credit off the 1,356-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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