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Flight Reliability

AS 17 · Alaska Airlines

New York → Seattle (JFK–SEA)

27
Bring Snacks
WanderNerd Reliability Score
43%
Arrive within 15 minutes
36 min
Average arrival delay
2.4%
Cancelled
20 min
Median arrival delay

Based on 288 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

AS 17 departing between 3–6 PM arrived on time 74% of the time, versus 40% between 6–9 PM.

Thursdays have been rough.

AS 17 arrived on time 53% of the time on Sundays and just 28% on Thursdays. That gap is worth planning around.

Well behind the JFK–SEA route.

AS 17 arrived on time 43% of the time, versus 69% across the JFK–SEA route.

Well behind the Alaska Airlines network.

AS 17 arrived on time 43% of the time, versus 80% across the Alaska Airlines network.

The breakdown

On-time by weekday
  • Mon46%(41 flights)
  • Tue37%(38 flights)
  • Wed45%(42 flights)
  • Thu28%(40 flights)
  • Fri45%(42 flights)
  • Sat43%(37 flights)
  • Sun53%(40 flights)
On-time by departure window
  • 3–6 PM74%(19 flights)
  • 6–9 PM40%(261 flights)
On-time trend by month
78%
May

Jun 7% → May 78% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 20257%29
July 202530%27
August 202553%30
September 202560%30
October 202537%30
November 202539%28
December 202539%31
March 20267%14
April 202664%28
May 202678%27
Departures on time
67%
Diverted
0.3%
Flights flown
280
Months covered
11

Same route, other flights

Keep nerding

Based on 288 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.