SEA → BOS

AS460

AS460 (Alaska Airlines) flies Seattle to Boston. Of 617 departures recorded from October 2024 to July 2026, 72.6% left on time, according to the US BTS.

Recorded departures by month

The most recent periods19 periods
PeriodDepartures 2025Departures 2026Change vs last year
January2130▲ 42.9%
February2328▲ 21.7%
March31310.0%
April2630▲ 15.4%
May2331▲ 34.8%
June2930▲ 3.4%
July31310.0%
August31––
September30––
October30–in progress
November28––
December29––
Year to date (Jan–Jul)184211▲ 14.7%

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
January81.0%79.3%▼ 2.0%
February81.8%80.8%▼ 1.3%
March80.7%77.4%▼ 4.0%
April73.1%80.0%▲ 9.5%
May73.9%77.4%▲ 4.7%
June58.6%70.0%▲ 19.4%
July61.3%45.2%▼ 26.3%
August64.5%––
September73.3%––
October69.0%–in progress
November82.1%––
December72.4%––
Year-to-date average (Jan–Jul)72.9%72.9%0.0%

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–
February12▲ 100.0%
March00–
April00–
May00–
June00–
July00–
August0––
September0––
October1–in progress
November0––
December0––
Year to date (Jan–Jul)13▲ 200.0%

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 99.2% 612
  • Cancelled 0.8% 5

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 BOS Seattle–Tacoma International Airport – Boston Logan International Airport 4,006 12.6 min 72.6% 617
Monthly figures
PeriodDepartures With departure delay recordedOn time Cancelled
October 2024 18 18 83.3% 0
November 2024 28 28 75.0% 0
December 2024 28 28 67.9% 0
January 2025 21 21 81.0% 0
February 2025 23 22 81.8% 1
March 2025 31 31 80.7% 0
April 2025 26 26 73.1% 0
May 2025 23 23 73.9% 0
June 2025 29 29 58.6% 0
July 2025 31 31 61.3% 0
August 2025 31 31 64.5% 0
September 2025 30 30 73.3% 0
October 2025 30 29 69.0% 1
November 2025 28 28 82.1% 0
December 2025 29 29 72.4% 0
January 2026 30 29 79.3% 1
February 2026 28 26 80.8% 2
March 2026 31 31 77.4% 0
April 2026 30 30 80.0% 0
May 2026 31 31 77.4% 0
June 2026 30 30 70.0% 0
July 2026 31 31 45.2% 0

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