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Route Reliability

San Antonio → Seattle

SAT–SEA · 1,774 miles · San Antonio International Airport to Seattle–Tacoma International Airport

77
Usually Fine
WanderNerd Reliability Score
76%
Arrive within 15 minutes
5 min
Average arrival delay
1.4%
Cancelled
558
Flights in the data

Data through May 2026.

Alaska Airlines is the only airline in this data on this route, arriving on time 76% of the time across 558 flights. No comparison to make.

What the data says

Morning flights do better here.

SAT–SEA flights departing between 6–9 AM arrived on time 84% of the time, versus 66% between 6–9 PM.

Tuesday is the weak spot.

SAT–SEA flights arrived on time 82% of the time on Wednesdays. On Tuesdays: 71%.

Ticking up lately.

SAT–SEA flights arrived on time 80% of the time over the last three months in the data, compared with 77% 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
  • Mon75%(83 flights)
  • Tue71%(72 flights)
  • Wed82%(71 flights)
  • Thu78%(83 flights)
  • Fri75%(83 flights)
  • Sat76%(70 flights)
  • Sun74%(87 flights)
On-time by departure window
  • 6–9 AM84%(236 flights)
  • 3–6 PM83%(54 flights)
  • 6–9 PM66%(259 flights)
On-time trend by month
92%
May

Jun 60% → May 92% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202560%60
July 202564%59
August 202573%56
September 202594%47
October 202577%52
November 202581%48
December 202567%52
January 202673%37
February 202689%28
March 202655%31
April 202693%29
May 202692%50

Keep nerding

Based on 558 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.