Historical on-time performance
San Juan to Atlanta
1,547 miData through May 2026Source: US DOT · BTS
Flights on SJU–ATL arrive on time 83% of the time over the last 12 months.
On-time rate83%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled1.4%of scheduled flights
based on 1,955 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesbestOn-time89%Medianon timep9010 minCancel1.0%Flights1,645
- Frontier AirlinesOn-time54%Median5 minp9090 minCancel2.8%Flights218
- Spirit AirlinesOn-time52%Medianon timep9090 minCancel4.3%Flights92
Why flights run late
Delay causes
- Airline45%
- Weather0%
- Air traffic (NAS)16%
- Late aircraft38%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline52%
- Weather26%
- Air traffic (NAS)0%
- Security22%
Most cancellations here are attributed to Airline. Shares are among 27 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SJU → ATL
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 89% on time.
- Mornings89% on time · p90 10 min · 1,606 flights
- Middays81% on time · p90 30 min · 1,036 flights
- Evenings79% on time · p90 40 min · 1,502 flights
- Afternoons74% on time · p90 50 min · 2,045 flights
- Early mornings68% on time · p90 60 min · 107 flights · limited
- Overnights57% on time · p90 95 min · 142 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 35 min · 828 flights
- Tuesdays83% on time · p90 25 min · 830 flights
- Fridays81% on time · p90 35 min · 975 flights
- Thursdays81% on time · p90 35 min · 921 flights
- Mondays78% on time · p90 40 min · 954 flights
- Saturdays76% on time · p90 45 min · 984 flights
- Sundays75% on time · p90 45 min · 946 flights
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