BWI (Baltimore) to GSP (Greenville) flights arrive on time 80% of the time. The most reliable airline on this route is Southwest Airlines at 81%. The average delay is 68 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated August 2026.BWI → GSP
BWI (Baltimore) to GSP (Greenville)
BWI → GSP on-time performance by month
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This route is on time most of the time. About 80% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Accurate?
Good to know
Departing from BWI
80% on timeTSA is currently ~5 min. Best time: 4 AM (about 5 min).
Arriving at GSP
80% on timeWhen flights into GSP are late, the average delay is 74 minutes. Build buffer if you have ground plans.
If connecting at GSP: TSA is ~5 min right now. Allow at least 60 minutes for a domestic connection.
GSP has a 2.3% cancellation rate — keep the airline app handy for rebooking.
Flight cancelled or delayed?
Check what Southwest Airlines owes you — refund rights, action plan, complaint email. Free.
Flying out of BWI? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Know someone flying soon?
Send them the link — delay data, TSA waits, weather, all free.
Data last updated August 2026. Source: Bureau of Transportation Statistics.