BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
ATL→SJU

Atlanta, GA (ATL) to San Juan, PR (SJU) flight delay odds

69.5% of 2,130 official scheduled ATL-to-SJU flights arrived on time; 17.7% arrived at least 30 minutes late and 1.3% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALVariable
69.5%arrived on time
17.7%30+ min late
1.3%cancelled
2,130scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late8.3%all scheduled flights
120+ minutes late3.0%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+14.6 mincompleted flights

Which departure time was most reliable for ATL to SJU?

Among qualifying ATL-to-SJU departure window results, Early morning had the highest on-time rate: 85.6% of 376 flights. Evening was lowest at 60.3% across 390 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning37685.6%5.6%0.8%
Late morning70364.9%19.9%1.0%
Afternoon64571.0%17.7%1.4%
Evening39060.3%25.1%2.1%

Which weekday was most reliable for ATL to SJU?

Among qualifying ATL-to-SJU weekday results, Wednesday had the highest on-time rate: 82.3% of 265 flights. Saturday was lowest at 59.9% across 342 flights.

DayFlightsOn time30+ minCancelled
Monday30166.1%21.6%1.0%
Tuesday26873.5%14.6%0.4%
Wednesday26582.3%10.2%0.0%
Thursday31471.0%15.6%0.0%
Friday32373.4%15.2%0.3%
Saturday34259.9%22.5%4.4%
Sunday31763.4%22.7%2.2%

Which airline was most reliable for ATL to SJU?

Among qualifying ATL-to-SJU airline results, Delta Air Lines had the highest on-time rate: 75.1% of 1,636 flights. Spirit Airlines was lowest at 44.0% across 125 flights.

AirlineFlightsOn time30+ minCancelled
Delta Air Lines1,63675.1%13.2%0.9%
Frontier Airlines36953.4%32.8%1.6%
Spirit Airlines12544.0%32.8%4.8%

Which month was most reliable for ATL to SJU?

Among qualifying ATL-to-SJU month results, June 2026 had the highest on-time rate: 80.5% of 174 flights. March 2026 was lowest at 59.1% across 230 flights.

MonthFlightsOn time30+ minCancelled
July 202520868.3%18.8%0.0%
August 202515569.7%20.0%0.6%
September 202512875.8%14.1%0.0%
October 202513376.7%11.3%0.0%
November 202514974.5%12.8%2.0%
December 202519465.5%19.1%2.6%
January 202619364.8%21.2%5.2%
February 202617969.8%14.5%0.0%
March 202623059.1%27.0%3.0%
April 202620163.2%19.9%0.0%
May 202618675.3%15.1%0.5%
June 202617480.5%12.6%0.0%

What drove ATL to SJU delay minutes?

Airline was the largest recorded ATL-to-SJU delay category, accounting for 47.7% of 35,850 BTS-attributed delay minutes during July 2025–June 2026.

Airline47.7%
Late aircraft27.9%
National airspace22.6%
Weather1.7%
Security0.1%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.