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

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

Historically, 71.9% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 2,234 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
71.9%arrived on time
16.5%30+ min late
2.0%cancelled
2,234scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late8.4%all scheduled flights
120+ minutes late3.3%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+7.0 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 morning63477.1%11.5%1.3%
Late morning23186.1%8.2%0.4%
Afternoon47376.1%14.2%2.7%
Evening89662.4%23.4%2.6%

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
Monday32671.8%17.5%2.8%
Tuesday32374.6%14.9%0.9%
Wednesday31374.1%15.7%1.0%
Thursday32573.2%16.6%2.8%
Friday32671.2%16.6%0.9%
Saturday29372.0%16.0%1.7%
Sunday32866.8%18.3%4.0%

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 Airlines1,23768.6%18.2%2.8%
United Airlines99776.1%14.4%1.0%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 202521765.9%26.7%3.7%
August 202522976.4%13.1%0.9%
September 202522785.9%8.4%0.9%
October 202520670.9%16.0%1.9%
November 202517160.2%24.6%4.7%
December 202517844.4%33.1%1.7%
January 202611977.3%12.6%4.2%
February 202610374.8%11.7%7.8%
March 202616548.5%27.3%0.6%
April 202618189.5%3.9%1.1%
May 202621387.8%6.1%0.0%
June 202622574.7%16.0%0.9%

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.

Airline17.8%
Late aircraft36.2%
National airspace37.7%
Weather7.3%
Security1.1%
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.