Boston (BOS) to St Louis (STL)
Flight time
≈ 2h 53m
Bearing
263° W
Boston (BOS) to St Louis (STL) is 1,044 miles (1,680 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies BOS–STL
US DOT T-100 · filed dataIn April 2026, Southwest Airlines operated the most departures, one of 4 carriers flying nonstop BOS–STL; the Embraer E175 was the most common aircraft at 44% of departures; flights ran 74% full.
Departures
268
April 2026
Seats
34,868
both directions
Passengers
25,938
both directions
Load factor
74.4%
passengers ÷ seats
Who flies BOS–STL?
Southwest Airlines operated the most nonstop BOS–STL departures in April 2026 (150), one of 4 carriers on the route.
- WN
Southwest Airlines
150 departures · 25,870 seats
Share of departures56.0%73.6%
Load
- YX
Republic Airways
59 departures · 4,462 seats
Share of departures22.0%79.0%
Load
- MQ
Envoy Air
58 departures · 4,408 seats
Share of departures21.6%73.8%
Load
- AA
American Airlines
1 departures · 128 seats
Share of departures0.4%97.7%
Load
What plane flies BOS–STL?
In April 2026, the Embraer E175 flew 44% of BOS–STL departures — more than any other aircraft type.
- Embraer E175
117 departures · 76.4% load
43.7% - Boeing 737 MAX 8
86 departures · 72.7% load
32.1% - Boeing 737-800
54 departures · 73.9% load
20.2% - Boeing 737-700
10 departures · 80.7% load
3.7% - Airbus A319
1 departures · 97.7% load
0.4%
How has BOS–STL traffic changed?
Nonstop BOS–STL departures fell from 296 in May 2025 to 268 in April 2026.
Monthly nonstop BOS–STL traffic, trailing 12 months through April 2026. Bars scale to the busiest month; months with no filed service show as zero.
May 2025
296 departures · 31,468 passengers
83.4%
Load
June 2025
289 departures · 31,316 passengers
82.3%
Load
July 2025
292 departures · 32,064 passengers
84.2%
Load
August 2025
291 departures · 33,247 passengers
86.7%
Load
September 2025
281 departures · 29,660 passengers
80.3%
Load
October 2025
297 departures · 34,173 passengers
86.9%
Load
November 2025
279 departures · 29,311 passengers
78.3%
Load
December 2025
291 departures · 29,463 passengers
75.8%
Load
January 2026
192 departures · 15,281 passengers
66.6%
Load
February 2026
182 departures · 13,377 passengers
63.0%
Load
March 2026
233 departures · 20,922 passengers
71.7%
Load
April 2026
268 departures · 25,938 passengers
74.4%
Load
By direction
The DOT files each direction separately — they rarely match.
BOS → STL
73.1% full
134 departures · 12,755 passengers
STL → BOS
75.7% full
134 departures · 13,183 passengers
Nonstop BOS–STL 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 St Louis (STL)?
BOS to STL is 1,044 miles (1,680 km / 907 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from BOS to STL?
A nonstop covers the 1,044-mile great-circle distance in roughly 2h 53m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies BOS–STL?
In April 2026, the Embraer E175 flew the largest share of departures (43.7%), followed by the Boeing 737 MAX 8 (32.1%).
What mileage do I earn flying BOS–STL?
Distance-based programs credit off the 1,044-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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