ONT → SEA

AS1242

AS1242 (Alaska Airlines) flies Ontario to Seattle. Of 50 departures recorded from July 2025 to August 2025, 69.4% left on time, according to the US BTS.

according to the US BTS · Jul 1, 2025 → Aug 19, 2025 domestic flights only

Recorded departures by month

The most recent periods2 periods
PeriodDepartures 2024Departures 2025Change vs last year
January–––
February–––
March–––
April–––
May–––
June–––
July–31–
August–19–
September–––
October–––
November–––
December–––

according to the US BTS · July 2025 → August 2025

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 periods2 periods
PeriodOn time 2024On time 2025Change vs last year
January–––
February–––
March–––
April–––
May–––
June–––
July–66.7%–
August–73.7%–
September–––
October–––
November–––
December–––

according to the US BTS · July 2025 → August 2025

Average departure delay by month

All legs combined

according to the US BTS · July 2025 → August 2025

Cancelled departures by month

All legs combined
The most recent periods2 periods
PeriodCancelled 2024Cancelled 2025Change vs last year
January–––
February–––
March–––
April–––
May–––
June–––
July–1–
August–0–
September–––
October–––
November–––
December–––

according to the US BTS · July 2025 → August 2025

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% 49
  • Cancelled 2.0% 1

Share of all recorded flights in the period, all legs. · Jul 1, 2025 → Aug 19, 2025

Legs flown under this number

1
RoutesDistance (km)Avg delay On timeDepartures
ONT SEA Ontario International Airport – Seattle–Tacoma International Airport 1,540 14.9 min 69.4% 50
Monthly figures
PeriodDepartures With departure delay recordedOn time Cancelled
July 2025 31 30 66.7% 1
August 2025 19 19 73.7% 0

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