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.
Look up a route, or build a trip
Change the airports, or add stops for a multi-leg trip.
What actually flies BOS–DEN
US DOT T-100 · filed dataIn April 2026, United Airlines operated the most departures, one of 4 carriers flying nonstop BOS–DEN; the Airbus A321neo was the most common aircraft at 52% of departures; flights ran 86% full.
Departures
568
April 2026
Seats
103,888
both directions
Passengers
88,845
both directions
Load factor
85.5%
passengers ÷ seats
Who flies BOS–DEN?
United Airlines operated the most nonstop BOS–DEN departures in April 2026 (298), one of 4 carriers on the route.
- UA
United Airlines
298 departures · 58,262 seats
Share of departures52.5%87.5%
Load
- WN
Southwest Airlines
120 departures · 20,810 seats
Share of departures21.1%86.9%
Load
- B6
JetBlue Airways
90 departures · 13,424 seats
Share of departures15.8%78.3%
Load
- DL
Delta Air Lines
60 departures · 11,392 seats
Share of departures10.6%81.5%
Load
What plane flies BOS–DEN?
In April 2026, the Airbus A321neo flew 52% of BOS–DEN departures — more than any other aircraft type.
- Airbus A321neo
294 departures · 86.6% load
51.8% - Boeing 737 MAX 8
77 departures · 85.3% load
13.6% - Airbus A220-300
56 departures · 83.0% load
9.9% - Boeing 737-900ER
45 departures · 86.2% load
7.9% - Boeing 737-800
44 departures · 90.6% load
7.8% - Airbus A320
32 departures · 75.1% load
5.6% - Boeing 737 MAX 9
9 departures · 78.0% load
1.6% - Boeing 737-700
5 departures · 87.7% load
0.9% - Airbus A319
4 departures · 90.3% load
0.7% - Airbus A321
2 departures · 27.3% load
0.4%
How has BOS–DEN traffic changed?
Nonstop BOS–DEN departures fell from 682 in May 2025 to 568 in April 2026.
Monthly nonstop BOS–DEN traffic, trailing 12 months through April 2026. Bars scale to the busiest month; months with no filed service show as zero.
May 2025
682 departures · 108,706 passengers
89.5%
Load
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
By direction
The DOT files each direction separately — they rarely match.
BOS → DEN
85.6% full
284 departures · 44,496 passengers
DEN → BOS
85.5% full
284 departures · 44,349 passengers
Nonstop BOS–DEN traffic has been filed with the US DOT since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through April 2026; filings from 2025. Public domain (US Government work). The DOT publishes roughly three months in arrears.
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 April 2026, the Airbus A321neo flew the largest share of departures (51.8%), followed by the Boeing 737 MAX 8 (13.6%).
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.
Keep exploring
Every route below is its own page.