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

Newark, NJ (EWR) to San Juan, PR (SJU) flight delay odds

68.5% of 2,101 official scheduled EWR-to-SJU flights arrived on time; 20.1% arrived at least 30 minutes late and 3.0% 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
68.5%arrived on time
20.1%30+ min late
3.0%cancelled
2,101scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late11.2%all scheduled flights
120+ minutes late4.9%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+16.1 mincompleted flights

Which departure time was most reliable for EWR to SJU?

Among qualifying EWR-to-SJU departure window results, Early morning had the highest on-time rate: 72.4% of 713 flights. Night was lowest at 58.4% across 190 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning71372.4%16.5%3.6%
Late morning57172.0%17.0%2.6%
Afternoon12167.8%23.1%5.0%
Evening50663.2%23.5%2.8%
Night19058.4%32.1%0.5%

Which weekday was most reliable for EWR to SJU?

Among qualifying EWR-to-SJU weekday results, Tuesday had the highest on-time rate: 75.0% of 288 flights. Monday was lowest at 60.4% across 316 flights.

DayFlightsOn time30+ minCancelled
Monday31660.4%25.3%4.7%
Tuesday28875.0%17.0%2.1%
Wednesday29673.3%15.5%1.4%
Thursday29568.8%19.7%0.3%
Friday31268.9%20.8%2.9%
Saturday29569.8%19.3%3.7%
Sunday29964.2%22.7%5.4%

Which airline was most reliable for EWR to SJU?

Among qualifying EWR-to-SJU airline results, JetBlue Airways had the highest on-time rate: 73.9% of 628 flights. Frontier Airlines was lowest at 52.3% across 214 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines1,11369.3%19.2%2.3%
JetBlue Airways62873.9%16.9%3.3%
Frontier Airlines21452.3%31.8%2.8%
Spirit Airlines14663.7%24.0%6.2%

Which month was most reliable for EWR to SJU?

Among qualifying EWR-to-SJU month results, May 2026 had the highest on-time rate: 85.9% of 135 flights. November 2025 was lowest at 57.2% across 145 flights.

MonthFlightsOn time30+ minCancelled
July 202519961.3%25.1%5.5%
August 202519367.9%21.2%1.0%
September 202515274.3%17.1%0.0%
October 202514461.1%27.1%1.4%
November 202514557.2%27.6%3.4%
December 202519961.3%24.6%4.0%
January 202621460.3%24.8%7.9%
February 202618062.2%24.4%7.8%
March 202618872.9%16.5%0.5%
April 202619179.6%13.6%0.0%
May 202613585.9%5.2%0.7%
June 202616183.9%10.6%0.6%

What drove EWR to SJU delay minutes?

Airline was the largest recorded EWR-to-SJU delay category, accounting for 39.4% of 48,612 BTS-attributed delay minutes during July 2025–June 2026.

Airline39.4%
Late aircraft34.0%
National airspace22.8%
Weather3.7%
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.