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

Seattle, WA (SEA) to Austin, TX (AUS) flight delay odds

78.2% of 2,059 official scheduled SEA-to-AUS flights arrived on time; 12.1% arrived at least 30 minutes late and 1.0% 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
78.2%arrived on time
12.1%30+ min late
1.0%cancelled
2,059scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.4%all scheduled flights
120+ minutes late2.3%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+4.2 mincompleted flights

Which departure time was most reliable for SEA to AUS?

Among qualifying SEA-to-AUS departure window results, Early morning had the highest on-time rate: 89.2% of 400 flights. Afternoon was lowest at 68.6% across 204 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning40089.2%6.0%1.2%
Late morning78079.2%10.8%1.5%
Afternoon20468.6%19.1%0.0%
Evening59573.4%15.5%0.5%
Night8072.5%12.5%0.0%

Which weekday was most reliable for SEA to AUS?

Among qualifying SEA-to-AUS weekday results, Tuesday had the highest on-time rate: 87.6% of 298 flights. Friday was lowest at 72.2% across 295 flights.

DayFlightsOn time30+ minCancelled
Monday30677.1%13.7%0.3%
Tuesday29887.6%7.0%0.0%
Wednesday29681.8%11.8%0.0%
Thursday30276.2%13.9%0.7%
Friday29572.2%14.2%1.4%
Saturday25778.6%8.2%3.1%
Sunday30574.1%15.1%1.6%

Which airline was most reliable for SEA to AUS?

Among qualifying SEA-to-AUS airline results, Delta Air Lines had the highest on-time rate: 79.9% of 936 flights. Alaska Airlines was lowest at 77.6% across 1,096 flights.

AirlineFlightsOn time30+ minCancelled
Alaska Airlines1,09677.6%11.7%0.7%
Delta Air Lines93679.9%12.2%1.3%
Southwest Airlines2740.7%25.9%0.0%

Which month was most reliable for SEA to AUS?

Among qualifying SEA-to-AUS month results, April 2026 had the highest on-time rate: 87.6% of 170 flights. July 2025 was lowest at 59.6% across 208 flights.

MonthFlightsOn time30+ minCancelled
July 202520859.6%23.1%1.0%
August 202519574.9%14.9%0.5%
September 202516784.4%8.4%0.6%
October 202517483.3%6.3%2.3%
November 202517277.9%13.4%1.2%
December 202516975.7%14.8%0.6%
January 202611679.3%12.1%3.4%
February 202612487.1%8.1%0.0%
March 202617284.9%7.6%2.3%
April 202617087.6%7.1%0.0%
May 202618578.4%10.8%0.0%
June 202620773.4%14.5%0.5%

What drove SEA to AUS delay minutes?

Airline was the largest recorded SEA-to-AUS delay category, accounting for 43.8% of 24,364 BTS-attributed delay minutes during July 2025–June 2026.

Airline43.8%
Late aircraft29.2%
National airspace24.4%
Weather2.4%
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.