Historical on-time performance
Baltimore to Greenville
426 miData through Dec 2025Source: US DOT · BTS
Flights on BWI–GSP arrive on time 78% of the time over the last 12 months.
On-time rate78%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled0.6%of scheduled flights
based on 691 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time78%Medianon timep9050 minCancel0.6%Flights691
Why flights run late
Delay causes
- Airline32%
- Weather5%
- Air traffic (NAS)15%
- Late aircraft47%
- Security1%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly BWI → GSP
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 56% to 89% on time.
- Mornings89% on time · p90 15 min · 638 flights
- Middays87% on time · p90 15 min · 106 flights · limited
- Evenings70% on time · p90 65 min · 328 flights
- Afternoons70% on time · p90 40 min · 358 flights
- Overnights56% on time · p90 115 min · 221 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 81% on time.
- Tuesdays81% on time · p90 25 min · 232 flights
- Wednesdays78% on time · p90 40 min · 231 flights
- Thursdays78% on time · p90 45 min · 233 flights
- Saturdays77% on time · p90 60 min · 228 flights
- Sundays76% on time · p90 40 min · 257 flights
- Mondays75% on time · p90 40 min · 236 flights
- Fridays72% on time · p90 50 min · 234 flights
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