Boston (BOS) to Louisville (SDF)
Flight time
≈ 2h 27m
Bearing
254° W
Boston (BOS) to Louisville (SDF) is 827 miles (1,331 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies BOS–SDF
Filed traffic dataIn July 2026, Republic Airways operated the most departures, one of 2 carriers flying nonstop BOS–SDF; the Embraer E175 was the most common aircraft at 100% of departures; flights ran 87% full.
Departures
120
July 2026
Seats
9,120
both directions
Passengers
7,897
both directions
Load factor
86.6%
RPM ÷ ASM
Who flies BOS–SDF?
Republic Airways operated the most nonstop BOS–SDF departures in July 2026 (77), one of 2 carriers on the route.
- YX
77 departures · 5,852 seats
Share of departures64.2%85.0%
Load
- MQ
43 departures · 3,268 seats
Share of departures35.8%89.5%
Load
What plane flies BOS–SDF?
In July 2026, the Embraer E175 flew 100% of BOS–SDF departures.
- Embraer E175
120 departures · 86.6% load
100.0%
How has BOS–SDF traffic changed?
Nonstop BOS–SDF departures fell from 121 in August 2025 to 120 in July 2026.
Monthly nonstop BOS–SDF traffic, trailing 12 months through July 2026. Bars scale to the busiest month; months with no filed service show as zero.
August 2025
121 departures · 7,440 passengers
81.0%
Load
September 2025
119 departures · 7,578 passengers
82.4%
Load
October 2025
123 departures · 8,192 passengers
85.5%
Load
November 2025
121 departures · 6,281 passengers
67.1%
Load
December 2025
114 departures · 5,454 passengers
63.7%
Load
January 2026
95 departures · 3,041 passengers
41.4%
Load
February 2026
91 departures · 3,326 passengers
48.1%
Load
March 2026
122 departures · 5,391 passengers
58.3%
Load
April 2026
124 departures · 6,416 passengers
67.3%
Load
May 2026
128 departures · 7,119 passengers
72.4%
Load
June 2026
121 departures · 7,377 passengers
80.2%
Load
July 2026
120 departures · 7,897 passengers
86.6%
Load
By direction
Each direction is filed separately — they rarely match.
BOS → SDF
86.3% full
61 departures · 4,001 passengers
SDF → BOS
86.9% full
59 departures · 3,896 passengers
Nonstop BOS–SDF 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
Louisville
US
Louisville Muhammad Ali International Airport
Coordinates
38.17°N, 85.74°W
Hemisphere
N · W
Frequently asked
How far is Boston (BOS) from Louisville (SDF)?
BOS to SDF is 827 miles (1,331 km / 719 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from BOS to SDF?
A nonstop covers the 827-mile great-circle distance in roughly 2h 27m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies BOS–SDF?
In July 2026, the Embraer E175 flew the largest share of departures (100.0%).
What mileage do I earn flying BOS–SDF?
Distance-based programs credit off the 827-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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