Skip to content
WanderNerd
Check a flight

Flight Reliability

AS 34 · Alaska Airlines

Seattle → New York (SEA–JFK)

62
A Little Dicey
WanderNerd Reliability Score
69%
Arrive within 15 minutes
12 min
Average arrival delay
2.7%
Cancelled
2 min
Median arrival delay

Based on 364 historical flights. Data through May 2026.

What the data says

The 6–9 AM departure wins.

AS 34 departing between 6–9 AM arrived on time 95% of the time, versus 59% between 9 AM–12 PM.

Wednesdays have been rough.

AS 34 arrived on time 80% of the time on Fridays and just 59% on Wednesdays. That gap is worth planning around.

A bit behind the SEA–JFK route.

AS 34 arrived on time 69% of the time, versus 74% across the SEA–JFK route.

Lagging the Alaska Airlines network.

AS 34 arrived on time 69% of the time, versus 80% across the Alaska Airlines network.

The breakdown

On-time by weekday
  • Mon72%(50 flights)
  • Tue75%(51 flights)
  • Wed59%(51 flights)
  • Thu67%(51 flights)
  • Fri80%(49 flights)
  • Sat71%(51 flights)
  • Sun60%(48 flights)
On-time by departure window
  • 6–9 AM95%(100 flights)
  • 9 AM–12 PM59%(251 flights)
On-time trend by month
80%
May

Jun 40% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202540%30
July 202522%27
August 202555%31
September 202560%30
October 202563%30
November 202569%29
December 202559%29
January 202690%29
February 2026100%25
March 202694%31
April 202697%30
May 202680%30
Departures on time
72%
Diverted
0.8%
Flights flown
351
Months covered
12

Same route, other flights

Keep nerding

Based on 364 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.