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
Filed traffic dataIn June 2026, Southwest Airlines operated the most departures, one of 4 carriers flying nonstop BOS–STL; the Embraer E175 was the most common aircraft at 38% of departures; flights ran 79% full.
Departures
286
June 2026
Seats
38,150
both directions
Passengers
30,317
both directions
Load factor
79.5%
RPM ÷ ASM
Who flies BOS–STL?
Southwest Airlines operated the most nonstop BOS–STL departures in June 2026 (176), one of 4 carriers on the route.
- WN
176 departures · 29,736 seats
Share of departures61.5%80.4%
Load
- YX
65 departures · 4,940 seats
Share of departures22.7%72.0%
Load
- MQ
44 departures · 3,344 seats
Share of departures15.4%82.8%
Load
- DL
1 departures · 130 seats
Share of departures0.3%68.5%
Load
What plane flies BOS–STL?
In June 2026, the Embraer E175 flew 38% of BOS–STL departures — more than any other aircraft type.
- Embraer E175
109 departures · 76.4% load
38.1% - Boeing 737 MAX 8
95 departures · 80.9% load
33.2% - Boeing 737-800
53 departures · 80.2% load
18.5% - Boeing 737-700
28 departures · 78.5% load
9.8% - Airbus A220-300
1 departures · 68.5% load
0.4%
How has BOS–STL traffic changed?
Nonstop BOS–STL departures fell from 292 in July 2025 to 286 in June 2026.
Monthly nonstop BOS–STL traffic, trailing 12 months through June 2026. Bars scale to the busiest month; months with no filed service show as zero.
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
May 2026
283 departures · 29,207 passengers
77.7%
Load
June 2026
286 departures · 30,317 passengers
79.5%
Load
By direction
Each direction is filed separately — they rarely match.
BOS → STL
77.5% full
143 departures · 14,871 passengers
STL → BOS
81.4% full
143 departures · 15,446 passengers
Nonstop BOS–STL traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through June 2026; filings from 2025. Public domain (US Government work).
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 June 2026, the Embraer E175 flew the largest share of departures (38.1%), followed by the Boeing 737 MAX 8 (33.2%).
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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