Historical on-time performance
New York to San Antonio
1,587 miData through Dec 2025Source: US DOT · BTS
Flights on JFK–SAT arrive on time 89% of the time over the last 12 months.
On-time rate89%arrived within 15 min
p90 delay15 min1 in 10 flights is worse (tail risk)
Cancelled1.0%of scheduled flights
based on 307 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesOn-time89%Medianon timep9015 minCancel1.0%Flights307
Why flights run late
Delay causes
- Airline61%
- Weather0%
- Air traffic (NAS)36%
- Late aircraft3%
- Security0%
Most delay minutes here are attributed to Airline.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly JFK → SAT
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 62% to 81% on time.
- Mornings81% on time · p90 30 min · 868 flights
- Middays78% on time · p90 45 min · 689 flights
- Afternoons62% on time · p90 80 min · 50 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 84% on time.
- Wednesdays84% on time · p90 25 min · 230 flights
- Thursdays82% on time · p90 35 min · 231 flights
- Mondays80% on time · p90 30 min · 234 flights
- Tuesdays80% on time · p90 35 min · 232 flights
- Fridays78% on time · p90 45 min · 233 flights
- Saturdays76% on time · p90 40 min · 231 flights
- Sundays75% on time · p90 60 min · 233 flights
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