Baltimore (BWI) to Greenville/Greer/Spartanburg (GSP)
Flight time
≈ 1h 39m
Bearing
228° SW
Baltimore (BWI) to Greenville/Greer/Spartanburg (GSP) is 425 miles (685 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies BWI–GSP
US DOT T-100 · filed dataIn April 2026, Southwest Airlines was the only carrier flying nonstop BWI–GSP; the Boeing 737-700 was the most common aircraft at 98% of departures; flights ran 68% full.
Departures
120
April 2026
Seats
16,516
both directions
Passengers
11,274
both directions
Load factor
68.3%
passengers ÷ seats
Who flies BWI–GSP?
Southwest Airlines was the only carrier to fly nonstop BWI–GSP in April 2026 (120 departures).
- WN
Southwest Airlines
120 departures · 16,516 seats
Share of departures100.0%68.3%
Load
What plane flies BWI–GSP?
In April 2026, the Boeing 737-700 flew 98% of BWI–GSP departures — more than any other aircraft type.
- Boeing 737-700
118 departures · 68.4% load
98.3% - Boeing 737-800
2 departures · 61.4% load
1.7%
How has BWI–GSP traffic changed?
Nonstop BWI–GSP departures fell from 124 in May 2025 to 120 in April 2026.
Monthly nonstop BWI–GSP traffic, trailing 12 months through April 2026. Bars scale to the busiest month; months with no filed service show as zero.
May 2025
124 departures · 13,880 passengers
76.5%
Load
June 2025
121 departures · 12,541 passengers
71.6%
Load
July 2025
122 departures · 11,984 passengers
67.5%
Load
August 2025
125 departures · 12,372 passengers
66.5%
Load
September 2025
120 departures · 12,355 passengers
69.2%
Load
October 2025
117 departures · 13,452 passengers
80.3%
Load
November 2025
112 departures · 11,453 passengers
71.5%
Load
December 2025
120 departures · 11,783 passengers
69.0%
Load
January 2026
112 departures · 6,906 passengers
41.9%
Load
February 2026
109 departures · 8,246 passengers
53.8%
Load
March 2026
124 departures · 11,278 passengers
64.6%
Load
April 2026
120 departures · 11,274 passengers
68.3%
Load
By direction
The DOT files each direction separately — they rarely match.
BWI → GSP
66.8% full
60 departures · 5,514 passengers
GSP → BWI
69.8% full
60 departures · 5,760 passengers
Nonstop BWI–GSP 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
Baltimore
US
Baltimore/Washington International Thurgood Marshall Airport
Coordinates
39.18°N, 76.67°W
Hemisphere
N · W
Greenville/Greer/Spartanburg
US
Greenville-Spartanburg International Airport
Coordinates
34.90°N, 82.22°W
Hemisphere
N · W
Frequently asked
How far is Baltimore (BWI) from Greenville/Greer/Spartanburg (GSP)?
BWI to GSP is 425 miles (685 km / 370 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from BWI to GSP?
A nonstop covers the 425-mile great-circle distance in roughly 1h 39m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies BWI–GSP?
In April 2026, the Boeing 737-700 flew the largest share of departures (98.3%), followed by the Boeing 737-800 (1.7%).
What mileage do I earn flying BWI–GSP?
Distance-based programs credit off the 425-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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