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Flight Reliability

AS 1255 · Alaska Airlines

Sacramento → Seattle (SMF–SEA)91% of its flights flew this route. The rest (ONT–SEA, OGG–HNL) are included in these numbers.

61
A Little Dicey
WanderNerd Reliability Score
62%
Arrive within 15 minutes
16 min
Average arrival delay
1.4%
Cancelled
10 min
Median arrival delay

Based on 138 historical flights. Data through May 2026.

What the data says

The 9 AM–12 PM departure wins.

AS 1255 departing between 9 AM–12 PM arrived on time 82% of the time, versus 60% between 6–9 AM.

Friday is doing you no favors.

AS 1255 arrived on time 76% of the time on Sundays and just 40% on Fridays. That gap is worth planning around.

Well behind the SMF–SEA route.

AS 1255 arrived on time 62% of the time, versus 83% across the SMF–SEA route.

Well behind the Alaska Airlines network.

AS 1255 arrived on time 62% of the time, versus 80% across the Alaska Airlines network.

The breakdown

On-time by weekday
  • Mon52%(21 flights)
  • Tue65%(17 flights)
  • Wed63%(19 flights)
  • Thu71%(21 flights)
  • Fri40%(20 flights)
  • Sat65%(17 flights)
  • Sun76%(21 flights)
On-time by departure window
  • 6–9 AM60%(124 flights)
  • 9 AM–12 PM82%(11 flights)
  • 12–3 PM—(1 flights)
On-time trend by month
43%
Oct

Jun 60% → Oct 43% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202560%30
July 202574%31
August 202573%30
September 202547%30
October 202543%14
Departures on time
83%
Diverted
0%
Flights flown
136
Months covered
6

Same route, other flights

Keep nerding

Based on 138 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.