ATL to SJU flight delays
Atlanta, GA (ATL) San Juan, PR (SJU) · 1,547 miles
2,130 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
70.51%
Arrived on time
Within 15 minutes of schedule
1.27%
Cancelled
Share of scheduled flights
58 min
When late, late by
Average across delayed arrivals
19 min
Delay per flight
Averaged over every flight flown
What the record says about this route
Which airline you fly changes the odds here. Delta Air Lines arrived on time 29.6 points more often than Spirit Airlines over the same period on the same route — same airports, same weather, same air traffic control. A gap that survives all of that is about how the two airlines are run.
The season swings this route hard. In June it ran 19.5 points more punctual than in March — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
The two directions do not behave alike. SJU to ATL arrives on time 11.5 points more often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
This route does worse than its own airport. ATL as a whole runs 8.3 points more punctual than these flights, which points at something specific to the route — the time of day it is scheduled, or the aircraft that feed it — rather than the airport.
Which airline should you fly on this route?
Over January 2025 – August 2026, Delta Air Lines arrived on time most often on ATL to SJU. Spirit Airlines was late most often. Flights ran closest to schedule in June and worst in March.
Every airline on ATL to SJU
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 1,636 | 75.8% | 0.92% | 51 min | C |
| Frontier Airlines | 369 | 54.72% | 1.63% | 75 min | F |
| Spirit Airlines | 125 | 46.22% | 4.8% | 56 min | F |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
SJU to ATL San Juan back to Atlanta 82.01% on time BOther routes from Atlanta
Common questions
Are flights from Atlanta to San Juan usually delayed?
70.51% of flights on the ATL to SJU route arrived within 15 minutes of schedule, so roughly 3 in every ten arrived late. That is worse than the average route in this record.
Which airline is most on time from Atlanta to San Juan?
Delta Air Lines, at 75.8% on time across 1,636 flights. The least punctual on the route was Spirit Airlines at 46.22%.
How often are ATL to SJU flights cancelled?
1.27% of scheduled flights did not operate — about 13 in every thousand. That is in the normal range.
What is the best month to fly Atlanta to San Juan?
June, when 80.5% of flights arrived on time. The worst was March at 61%.
When ATL to SJU flights are late, how late are they?
About 58 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on ATL to SJU during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →