Boston (BOS) to Denver (DEN)
Flight time
≈ 4h 18m
Bearing
276° W
Boston (BOS) to Denver (DEN) is 1,750 miles (2,816 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies BOS–DEN
Filed traffic dataIn May 2026, United Airlines operated the most departures, one of 4 carriers flying nonstop BOS–DEN; the Airbus A321neo was the most common aircraft at 47% of departures; flights ran 87% full.
Departures
644
May 2026
Seats
117,788
both directions
Passengers
102,967
both directions
Load factor
87.4%
RPM ÷ ASM
Who flies BOS–DEN?
United Airlines operated the most nonstop BOS–DEN departures in May 2026 (348), one of 4 carriers on the route.
- UA
348 departures · 66,958 seats
Share of departures54.0%88.6%
Load
- WN
124 departures · 21,472 seats
Share of departures19.3%89.0%
Load
- B6
112 departures · 17,720 seats
Share of departures17.4%82.9%
Load
- DL
60 departures · 11,638 seats
Share of departures9.3%84.8%
Load
What plane flies BOS–DEN?
In May 2026, the Airbus A321neo flew 47% of BOS–DEN departures — more than any other aircraft type.
- Airbus A321neo
304 departures · 89.1% load
47.2% - Boeing 737 MAX 8
81 departures · 89.8% load
12.6% - Airbus A220-300
78 departures · 89.4% load
12.1% - Boeing 737-900ER
61 departures · 85.1% load
9.5% - Boeing 737-800
60 departures · 86.0% load
9.3% - Airbus A321
34 departures · 72.4% load
5.3% - Boeing 737 MAX 9
17 departures · 81.2% load
2.6% - Boeing 737-700
6 departures · 95.3% load
0.9% - Airbus A319
3 departures · 75.1% load
0.5%
How has BOS–DEN traffic changed?
Nonstop BOS–DEN departures fell from 765 in June 2025 to 644 in May 2026.
Monthly nonstop BOS–DEN traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
June 2025
765 departures · 122,265 passengers
90.7%
Load
July 2025
843 departures · 135,145 passengers
90.2%
Load
August 2025
786 departures · 127,889 passengers
93.0%
Load
September 2025
663 departures · 108,181 passengers
91.6%
Load
October 2025
684 departures · 111,595 passengers
91.6%
Load
November 2025
583 departures · 86,661 passengers
82.9%
Load
December 2025
601 departures · 92,778 passengers
86.8%
Load
January 2026
500 departures · 75,448 passengers
82.5%
Load
February 2026
495 departures · 71,853 passengers
80.2%
Load
March 2026
599 departures · 92,494 passengers
87.3%
Load
April 2026
568 departures · 88,845 passengers
85.5%
Load
May 2026
644 departures · 102,967 passengers
87.4%
Load
By direction
Each direction is filed separately — they rarely match.
BOS → DEN
86.1% full
322 departures · 50,953 passengers
DEN → BOS
88.7% full
322 departures · 52,014 passengers
Nonstop BOS–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 Boston (BOS) from Denver (DEN)?
BOS to DEN is 1,750 miles (2,816 km / 1,520 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from BOS to DEN?
A nonstop covers the 1,750-mile great-circle distance in roughly 4h 18m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies BOS–DEN?
In May 2026, the Airbus A321neo flew the largest share of departures (47.2%), followed by the Boeing 737 MAX 8 (12.6%).
What mileage do I earn flying BOS–DEN?
Distance-based programs credit off the 1,750-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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