SEA → JFK

AS34

AS34 (Alaska Airlines) flies Seattle to New York. Of 657 departures recorded from October 2024 to July 2026, 75.8% left on time, according to the US BTS.

Recorded departures by month

The most recent periods19 periods
PeriodDepartures 2025Departures 2026Change vs last year
January3130▼ 3.2%
February28280.0%
March31310.0%
April30300.0%
May31310.0%
June30300.0%
July31310.0%
August31––
September30––
October31–in progress
November30––
December31––
Year to date (Jan–Jul)212211▼ 0.5%

according to the US BTS · October 2024 → July 2026

On-time departures by month

All legs combined

On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.

The most recent periods19 periods
PeriodOn time 2025On time 2026Change vs last year
January77.4%82.8%▲ 6.9%
February88.9%92.0%▲ 3.5%
March77.4%87.1%▲ 12.5%
April76.7%96.7%▲ 26.1%
May83.9%74.2%▼ 11.5%
June46.7%66.7%▲ 42.9%
July51.7%82.8%▲ 60.0%
August64.5%––
September76.7%––
October70.0%–in progress
November72.4%––
December51.7%––
Year-to-date average (Jan–Jul)71.8%83.2%▲ 15.8%

according to the US BTS · October 2024 → July 2026

Average departure delay by month

All legs combined

according to the US BTS · October 2024 → July 2026

Cancelled departures by month

All legs combined
The most recent periods19 periods
PeriodCancelled 2025Cancelled 2026Change vs last year
January01–
February13▲ 200.0%
March00–
April00–
May00–
June00–
July220.0%
August0––
September0––
October1–in progress
November1––
December2––
Year to date (Jan–Jul)36▲ 100.0%

according to the US BTS · October 2024 → July 2026

This is not a forecast

This is a historical record of departures already flown, not a forecast for your flight.

Cancellation share

  • Not cancelled 98.0% 644
  • Cancelled 2.0% 13

Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026

Legs flown under this number

1
RoutesDistance (km)Avg delay On timeDepartures
SEA JFK Seattle–Tacoma International Airport – John F. Kennedy International Airport 3,887 13.1 min 75.8% 657
Monthly figures
PeriodDepartures With departure delay recordedOn time Cancelled
October 2024 20 20 85.0% 0
November 2024 30 30 93.3% 0
December 2024 31 31 74.2% 0
January 2025 31 31 77.4% 0
February 2025 28 27 88.9% 1
March 2025 31 31 77.4% 0
April 2025 30 30 76.7% 0
May 2025 31 31 83.9% 0
June 2025 30 30 46.7% 0
July 2025 31 29 51.7% 2
August 2025 31 31 64.5% 0
September 2025 30 30 76.7% 0
October 2025 31 30 70.0% 1
November 2025 30 29 72.4% 1
December 2025 31 29 51.7% 2
January 2026 30 29 82.8% 1
February 2026 28 25 92.0% 3
March 2026 31 31 87.1% 0
April 2026 30 30 96.7% 0
May 2026 31 31 74.2% 0
June 2026 30 30 66.7% 0
July 2026 31 29 82.8% 2

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