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Flight Reliability

AS 41 · Alaska Airlines

New York → San Francisco (JFK–SFO)

44
Bring Snacks
WanderNerd Reliability Score
55%
Arrive within 15 minutes
30 min
Average arrival delay
2.0%
Cancelled
11 min
Median arrival delay

Based on 303 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

AS 41 departing between 12–3 PM arrived on time 93% of the time, versus 51% between 6–9 PM.

Thursdays have been rough.

AS 41 arrived on time 67% of the time on Tuesdays and just 41% on Thursdays. That gap is worth planning around.

Well behind the JFK–SFO route.

AS 41 arrived on time 55% of the time, versus 76% across the JFK–SFO route.

Well behind the Alaska Airlines network.

AS 41 arrived on time 55% of the time, versus 80% across the Alaska Airlines network.

The breakdown

On-time by weekday
  • Mon58%(45 flights)
  • Tue67%(39 flights)
  • Wed51%(39 flights)
  • Thu41%(42 flights)
  • Fri64%(45 flights)
  • Sat61%(38 flights)
  • Sun46%(48 flights)
On-time by departure window
  • 12–3 PM93%(15 flights)
  • 3–6 PM66%(44 flights)
  • 6–9 PM51%(237 flights)
On-time trend by month
76%
May

Jun 24% → May 76% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202524%29
July 202529%31
August 202548%31
September 202566%29
October 202539%31
November 202561%28
December 202571%28
March 202675%24
April 202662%26
May 202676%25
Departures on time
59%
Diverted
0.3%
Flights flown
296
Months covered
12

Same route, other flights

Keep nerding

Based on 303 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.