Historical on-time performance
Greenville to Baltimore
425 miData through Dec 2025Source: US DOT · BTS
Flights on GSP–BWI arrive on time 84% of the time over the last 12 months.
On-time rate84%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled0.7%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-time84%Medianon timep9025 minCancel0.7%Flights691
Why flights run late
Delay causes
- Airline18%
- Weather1%
- Air traffic (NAS)30%
- Late aircraft51%
- Security0%
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 GSP → BWI
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 95% on time.
- Mornings95% on time · p90 on time · 574 flights
- Middays91% on time · p90 10 min · 402 flights
- Afternoons78% on time · p90 45 min · 277 flights
- Evenings64% on time · p90 70 min · 290 flights
- Overnights62% on time · p90 45 min · 108 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 79% to 89% on time.
- Wednesdays89% on time · p90 15 min · 231 flights
- Tuesdays88% on time · p90 15 min · 232 flights
- Saturdays87% on time · p90 25 min · 227 flights
- Thursdays82% on time · p90 25 min · 233 flights
- Mondays81% on time · p90 30 min · 236 flights
- Fridays80% on time · p90 35 min · 235 flights
- Sundays79% on time · p90 35 min · 257 flights
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