Historical on-time performance
Greenville to Houston
845 miData through Dec 2025Source: US DOT · BTS
Flights on GSP–HOU arrive on time 75% of the time over the last 12 months.
On-time rate75%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights
based on 154 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time75%Medianon timep9050 minCancel0.0%Flights154
Why flights run late
Delay causes
- Airline11%
- Weather3%
- Air traffic (NAS)4%
- Late aircraft82%
- 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 → HOU
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.
- Middays89% on time · p90 10 min · 111 flights · limited
- Afternoons86% on time · p90 30 min · 141 flights · limited
- Evenings81% on time · p90 25 min · 109 flights · limited
- Overnights56% on time · p90 100 min · 52 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 79% to 87% on time.
- Saturdays87% on time · p90 25 min · 124 flights · limited
- Sundays79% on time · p90 40 min · 107 flights · limited
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