Direct flights from Miami (MIA) to Seattle (SEA): 21 nonstop departures observed each week across 3 airlines. The median arrival is 34 minutes late. No cancellations were recorded across the 2 tracked flights. The nonstop covers 4,379 km, an estimated 6 hours 7 minutes in the air. Measured by Pro Flight Search from live flight boards at Miami and Seattle. Updated 17 October 2026 at 21:39 UTC.
The MIA board at 17:07 shows departure at 22:02 instead of 20:15, gate D33 (TD).
Checked MIA board 17:07 · SEA board 14:22
route health from live MIA and SEA delay boards
Median arrival delay is +34 min. 0 of 2 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Actual board outcomes rather than schedules, paired departure and arrival per flight and day.
Current conditions put the pressure at MIA: 28% odds of a 15+ minute delay and around +-1 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →
next sweep in 120s
Pro Flight Search records official board updates for nonstop MIA to SEA flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — Miami (MIA) to Seattle (SEA) route reliability, measured from operated flights on official airport boards.
https://proflightsearch.com/search-flights/MIA-SEA
Mostly on schedule. The departure side at MIA is the weaker end, route health score 77/100. The airports section above carries the live status and delay window at both ends.
Operators schedule evening departures around 18:15 from MIA. Earlier flights typically land before destination-airport delays accumulate later in the day; check the SEA delay card to confirm conditions when you'd arrive.
Great-circle distance is 4,379 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 339–405 min gate-to-gate on this route.
3 carriers operate this route, around 21 flights a week between them. Compare carrier days and times in the airline list above.
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