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

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

Historically, 72.7% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 2,906 flights.

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

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

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%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

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%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 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%

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

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 reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

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.