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Route Reliability

Austin → Seattle

AUS–SEA · 1,770 miles · Austin–Bergstrom International Airport to Seattle–Tacoma International Airport

87
Pretty Reliable
WanderNerd Reliability Score
83%
Arrive within 15 minutes
3 min
Average arrival delay
1.0%
Cancelled
2,055
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.Delta Air Lines86%929 flights
  2. 2.Alaska Airlines81%1,126 flights

What the data says

Morning-you made the right choice.

AUS–SEA flights departing between 9 AM–12 PM arrived on time 91% of the time, versus 72% between 6–9 PM.

Monday has been the better bet.

A small edge: 86% on time on Mondays against 79% on Thursdays.

Delta Air Lines has a slight edge here.

Delta Air Lines arrived on time 86% of the time on this route; Alaska Airlines managed 81%.

Ticking up lately.

AUS–SEA flights arrived on time 86% of the time over the last three months in the data, compared with 82% in the three months before that.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon86%(300 flights)
  • Tue85%(291 flights)
  • Wed85%(297 flights)
  • Thu79%(300 flights)
  • Fri84%(290 flights)
  • Sat86%(248 flights)
  • Sun80%(306 flights)
On-time by departure window
  • 6–9 AM88%(682 flights)
  • 9 AM–12 PM91%(192 flights)
  • 12–3 PM86%(429 flights)
  • 3–6 PM85%(196 flights)
  • 6–9 PM72%(533 flights)
On-time trend by month
86%
May

Jun 76% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202576%204
July 202581%205
August 202583%194
September 202588%167
October 202586%169
November 202586%169
December 202573%168
January 202685%112
February 202690%124
March 202680%168
April 202692%170
May 202686%182

Keep nerding

Based on 2,055 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.