Historical on-time performance
Greenville to Denver
1,278 miData through Dec 2025Source: US DOT · BTS
Flights on GSP–DEN arrive on time 80% of the time over the last 12 months.
On-time rate80%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled0.7%of scheduled flights
based on 305 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- SkyWest AirlinesbestOn-time86%Medianon timep9025 minCancel1.6%Flights122
- United AirlinesOn-time75%Medianon timep9070 minCancel0.0%Flights183
Why flights run late
Delay causes
- Airline6%
- Weather4%
- Air traffic (NAS)76%
- Late aircraft14%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly GSP → DEN
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 79% to 80% on time.
- Afternoons80% on time · p90 40 min · 1,036 flights
- Mornings79% on time · p90 40 min · 87 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 82% on time.
- Mondays82% on time · p90 35 min · 157 flights · limited
- Saturdays82% on time · p90 30 min · 174 flights · limited
- Tuesdays80% on time · p90 55 min · 157 flights · limited
- Fridays80% on time · p90 35 min · 158 flights · limited
- Sundays78% on time · p90 50 min · 176 flights · limited
- Wednesdays78% on time · p90 40 min · 157 flights · limited
- Thursdays75% on time · p90 50 min · 153 flights · limited
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