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

Seattle, WA (SEA) to Newark, NJ (EWR) flight delay odds

79.4% of 2,235 official scheduled SEA-to-EWR flights arrived on time; 12.3% arrived at least 30 minutes late and 1.7% 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 SIGNALGenerally reliable
79.4%arrived on time
12.3%30+ min late
1.7%cancelled
2,235scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.6%all scheduled flights
120+ minutes late2.6%all scheduled flights
Diverted0.4%did not reach as scheduled
Average arrival-1.7 mincompleted flights

Which departure time was most reliable for SEA to EWR?

Among qualifying SEA-to-EWR departure window results, Early morning had the highest on-time rate: 87.0% of 802 flights. Late morning was lowest at 66.1% across 378 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning80287.0%7.1%2.2%
Late morning37866.1%18.5%2.9%
Afternoon39572.7%20.3%0.5%
Night65981.8%10.3%1.2%

Which weekday was most reliable for SEA to EWR?

Among qualifying SEA-to-EWR weekday results, Tuesday had the highest on-time rate: 86.4% of 324 flights. Sunday was lowest at 74.3% across 331 flights.

DayFlightsOn time30+ minCancelled
Monday32578.2%12.3%1.5%
Tuesday32486.4%8.3%0.6%
Wednesday31384.0%11.8%0.6%
Thursday32577.5%11.7%0.9%
Friday32676.7%12.0%2.5%
Saturday29179.0%14.4%2.1%
Sunday33174.3%15.7%3.9%

Which airline was most reliable for SEA to EWR?

Among qualifying SEA-to-EWR airline results, United Airlines had the highest on-time rate: 80.3% of 997 flights. Alaska Airlines was lowest at 78.7% across 1,238 flights.

AirlineFlightsOn time30+ minCancelled
Alaska Airlines1,23878.7%11.1%2.3%
United Airlines99780.3%13.8%1.1%

Which month was most reliable for SEA to EWR?

Among qualifying SEA-to-EWR month results, April 2026 had the highest on-time rate: 89.5% of 181 flights. July 2025 was lowest at 57.6% across 217 flights.

MonthFlightsOn time30+ minCancelled
July 202521757.6%27.6%3.2%
August 202522969.9%19.7%0.9%
September 202522787.2%7.0%0.0%
October 202520680.1%12.6%1.5%
November 202517177.8%14.0%5.3%
December 202517979.9%12.3%0.6%
January 202611881.4%9.3%4.2%
February 202610380.6%4.9%7.8%
March 202616683.1%13.3%1.2%
April 202618189.5%5.0%0.0%
May 202621387.8%6.1%0.0%
June 202622582.2%9.8%0.9%

What drove SEA to EWR delay minutes?

National airspace was the largest recorded SEA-to-EWR delay category, accounting for 48.6% of 28,382 BTS-attributed delay minutes during July 2025–June 2026.

Airline25.8%
Late aircraft19.0%
National airspace48.6%
Weather6.5%
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.