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

San Juan, PR (SJU) to Washington, DC (IAD) flight delay odds

85.2% of 697 official scheduled SJU-to-IAD flights arrived on time; 9.6% arrived at least 30 minutes late and 0.7% 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 SIGNALLower disruption
85.2%arrived on time
9.6%30+ min late
0.7%cancelled
697scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late4.4%all scheduled flights
120+ minutes late2.2%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival-0.5 mincompleted flights

Which departure time was most reliable for SJU to IAD?

Among qualifying SJU-to-IAD departure window results, Early morning had the highest on-time rate: 93.9% of 297 flights. Afternoon was lowest at 75.5% across 274 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning29793.9%4.0%0.7%
Afternoon27475.5%16.4%0.4%
Evening12685.7%7.9%1.6%

Which weekday was most reliable for SJU to IAD?

Among qualifying SJU-to-IAD weekday results, Wednesday had the highest on-time rate: 90.2% of 82 flights. Saturday was lowest at 79.0% across 105 flights.

DayFlightsOn time30+ minCancelled
Monday10286.3%9.8%1.0%
Tuesday9588.4%9.5%0.0%
Wednesday8290.2%4.9%0.0%
Thursday10284.3%12.7%0.0%
Friday9486.2%9.6%0.0%
Saturday10579.0%9.5%2.9%
Sunday11783.8%10.3%0.9%

Which airline was most reliable for SJU to IAD?

Among qualifying SJU-to-IAD airline results, United Airlines had the highest on-time rate: 88.2% of 608 flights. Frontier Airlines was lowest at 65.2% across 89 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines60888.2%7.6%0.7%
Frontier Airlines8965.2%23.6%1.1%

Which month was most reliable for SJU to IAD?

Among qualifying SJU-to-IAD month results, April 2026 had the highest on-time rate: 93.5% of 62 flights. August 2025 was lowest at 72.0% across 50 flights.

MonthFlightsOn time30+ minCancelled
July 20255377.4%18.9%0.0%
August 20255072.0%18.0%0.0%
October 20254383.7%9.3%0.0%
November 20257387.7%9.6%0.0%
December 20257783.1%13.0%0.0%
January 20267483.8%5.4%6.8%
February 20266382.5%9.5%0.0%
March 20266786.6%9.0%0.0%
April 20266293.5%3.2%0.0%
May 20266287.1%9.7%0.0%
June 20266093.3%5.0%0.0%

What drove SJU to IAD delay minutes?

Late aircraft was the largest recorded SJU-to-IAD delay category, accounting for 41.1% of 6,972 BTS-attributed delay minutes during July 2025–June 2026.

Airline36.8%
Late aircraft41.1%
National airspace21.1%
Weather1.0%
Security0.0%
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.