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Flight Reliability

AS 505 · Alaska Airlines

Seattle → Los Angeles (SEA–LAX)97% of its flights flew this route. The rest (BOS–SAN) are included in these numbers.

90
Nerd Approved
WanderNerd Reliability Score
83%
Arrive within 15 minutes
0 min
Average arrival delay
0.3%
Cancelled
4 min early
Median arrival delay

Based on 337 historical flights. Data through May 2026.

What the data says

Skip Tuesday if you can.

AS 505 arrived on time 89% of the time on Mondays. On Tuesdays: 76%.

A bit ahead of the Alaska Airlines network.

AS 505 arrived on time 83% of the time, versus 80% across the Alaska Airlines network.

It basically never cancels.

Out of 337 scheduled flights, only 0.3% were cancelled.

Trending in the right direction.

AS 505 arrived on time 87% of the time over the last three months in the data, compared with 76% in the three months before that.

The breakdown

On-time by weekday
  • Mon89%(52 flights)
  • Tue76%(45 flights)
  • Wed84%(43 flights)
  • Thu87%(52 flights)
  • Fri84%(50 flights)
  • Sat76%(46 flights)
  • Sun88%(48 flights)
On-time by departure window
  • 9 AM–12 PM83%(325 flights)
  • 3–6 PM82%(11 flights)
On-time trend by month
93%
May

Jun 83% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%30
July 202581%31
August 202583%29
September 202593%30
October 202586%28
November 202589%18
December 202570%27
January 202674%31
February 202682%28
March 202680%30
April 202689%27
May 202693%27
Departures on time
82%
Diverted
0%
Flights flown
336
Months covered
12

Same route, other flights

Keep nerding

Based on 337 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.