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

Phoenix, AZ (PHX) to Seattle, WA (SEA) flight delay odds

82.0% of 7,269 official scheduled PHX-to-SEA flights arrived on time; 9.8% arrived at least 30 minutes late and 0.6% 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 SIGNALLower disruption
82.0%arrived on time
9.8%30+ min late
0.6%cancelled
7,269scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late4.2%all scheduled flights
120+ minutes late1.7%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+0.6 mincompleted flights

Which departure time was most reliable for PHX to SEA?

Among qualifying PHX-to-SEA departure window results, Early morning had the highest on-time rate: 87.2% of 1,937 flights. Night was lowest at 59.3% across 241 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning1,93787.2%6.3%0.5%
Late morning1,37283.7%7.7%0.4%
Afternoon2,23281.9%9.5%0.9%
Evening1,48777.6%14.4%0.4%
Night24159.3%24.1%2.1%

Which weekday was most reliable for PHX to SEA?

Among qualifying PHX-to-SEA weekday results, Tuesday had the highest on-time rate: 85.7% of 1,012 flights. Friday was lowest at 78.3% across 1,062 flights.

DayFlightsOn time30+ minCancelled
Monday1,08480.1%11.0%0.8%
Tuesday1,01285.7%7.1%0.2%
Wednesday1,00583.8%8.4%0.1%
Thursday1,06680.9%11.0%0.5%
Friday1,06278.3%12.3%1.1%
Saturday98884.2%8.4%0.7%
Sunday1,05281.7%10.0%1.0%

Which airline was most reliable for PHX to SEA?

Among qualifying PHX-to-SEA airline results, Delta Air Lines had the highest on-time rate: 86.9% of 1,764 flights. Southwest Airlines was lowest at 64.3% across 1,037 flights.

AirlineFlightsOn time30+ minCancelled
Alaska Airlines2,90384.2%8.2%0.8%
Delta Air Lines1,76486.9%7.2%0.9%
Southwest Airlines1,03764.3%19.0%0.6%
Envoy Air69286.6%7.7%0.0%
SkyWest Airlines50681.8%11.1%0.6%
American Airlines20281.2%9.4%0.5%
Frontier Airlines16586.1%12.1%0.0%

Which month was most reliable for PHX to SEA?

Among qualifying PHX-to-SEA month results, February 2026 had the highest on-time rate: 90.0% of 568 flights. December 2025 was lowest at 76.6% across 627 flights.

MonthFlightsOn time30+ minCancelled
July 202562181.8%11.3%0.5%
August 202558479.8%10.1%0.5%
September 202554483.8%9.7%0.6%
October 202560079.8%12.0%0.5%
November 202559480.0%12.3%1.0%
December 202562776.6%10.4%0.5%
January 202658684.5%9.0%1.0%
February 202656890.0%5.8%0.2%
March 202668578.0%11.2%2.0%
April 202666787.4%6.4%0.1%
May 202662385.9%6.4%0.3%
June 202657077.4%12.8%0.4%

What drove PHX to SEA delay minutes?

Late aircraft was the largest recorded PHX-to-SEA delay category, accounting for 46.7% of 68,520 BTS-attributed delay minutes during July 2025–June 2026.

Airline33.8%
Late aircraft46.7%
National airspace15.7%
Weather3.8%
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.