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

Seattle, WA (SEA) to New York, NY (JFK) flight delay odds

72.7% of 2,906 official scheduled SEA-to-JFK flights arrived on time; 14.8% arrived at least 30 minutes late and 2.4% 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 SIGNALGenerally reliable
72.7%arrived on time
14.8%30+ min late
2.4%cancelled
2,906scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.4%all scheduled flights
120+ minutes late2.7%all scheduled flights
Diverted1.0%did not reach as scheduled
Average arrival+6.2 mincompleted flights

Which departure time was most reliable for SEA to JFK?

Among qualifying SEA-to-JFK departure window results, Early morning had the highest on-time rate: 82.3% of 729 flights. Late morning was lowest at 65.2% across 606 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning72982.3%8.1%3.4%
Late morning60665.2%19.8%2.3%
Afternoon72866.5%19.9%2.1%
Night84375.2%12.5%1.9%

Which weekday was most reliable for SEA to JFK?

Among qualifying SEA-to-JFK weekday results, Tuesday had the highest on-time rate: 77.4% of 421 flights. Sunday was lowest at 66.1% across 416 flights.

DayFlightsOn time30+ minCancelled
Monday41471.5%14.3%3.4%
Tuesday42177.4%13.1%1.0%
Wednesday41675.5%11.8%1.0%
Thursday41272.1%16.5%1.0%
Friday41772.7%14.6%2.9%
Saturday41073.7%14.1%2.2%
Sunday41666.1%19.0%5.5%

Which airline was most reliable for SEA to JFK?

Among qualifying SEA-to-JFK airline results, Delta Air Lines had the highest on-time rate: 76.7% of 1,337 flights. Alaska Airlines was lowest at 69.1% across 1,403 flights.

AirlineFlightsOn time30+ minCancelled
Alaska Airlines1,40369.1%17.1%2.6%
Delta Air Lines1,33776.7%11.5%2.4%
JetBlue Airways16671.1%21.1%1.2%

Which month was most reliable for SEA to JFK?

Among qualifying SEA-to-JFK month results, April 2026 had the highest on-time rate: 83.6% of 225 flights. July 2025 was lowest at 47.0% across 279 flights.

MonthFlightsOn time30+ minCancelled
July 202527947.0%35.5%2.9%
August 202527864.4%21.6%0.7%
September 202527075.6%13.3%0.4%
October 202527374.0%12.1%1.8%
November 202523477.8%11.5%2.6%
December 202523268.1%14.7%5.6%
January 202618773.3%14.4%4.3%
February 202618181.8%6.1%8.3%
March 202621478.5%12.6%2.3%
April 202622583.6%9.3%0.0%
May 202626379.5%8.0%1.9%
June 202627076.7%12.2%0.7%

What drove SEA to JFK delay minutes?

National airspace was the largest recorded SEA-to-JFK delay category, accounting for 39.4% of 42,788 BTS-attributed delay minutes during July 2025–June 2026.

Airline34.2%
Late aircraft21.6%
National airspace39.4%
Weather4.1%
Security0.7%
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.