MIA → SEAMiami to Seattle

live

Direct flights from Miami (MIA) to Seattle (SEA): 21 nonstop departures observed each week across 3 airlines. The median arrival is 98 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 9 September 2026 at 04:23 UTC.

MIA Miami disrupted · +107
SEA Seattle smooth · +0
4,379 km · ~6h 07m est.
dep bank 18:22–20:4521x weekly
Under pressure · 3 airlines · 21x weekly · nonstop
50 / 100

route health from live MIA and SEA delay boards

Median arrival delay is +98 min. 0 of 2 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival+98 minacross the last 2 operated legs
Flight time~6h 07mestimated from route distance
Weekly departures21x3 direct airlines on the leg

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Alaska AirlinesAmerican AirlinesDelta Air Lines

Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.

Who flies it

observed on the boards · 7 days
Alaska AirlinesAS

Flights AS305 18:22 daily

American AirlinesAA

Flights AA3252 20:45 daily

Delta Air LinesDL

Flights DL506 18:25 daily

History

operated legs · board outcomes
09-08AS305dep +145 → arr+98
09-08DL506dep +24 → arr−4

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
MIAMiami +107 min disrupted 🌤 mostly cloudy · N 0 kt Full MIA delay board →
SEASeattle +0 min smooth 🌤 few clouds · N 8 kt Full SEA delay board →

Weather lens

Current conditions put the pressure at MIA and SEA: 35% odds of a 15+ minute delay and around +2 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

How the Miami to Seattle route actually runs

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

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search — Miami (MIA) to Seattle (SEA) route reliability, measured from operated flights on official airport boards.

Canonical URL
https://proflightsearch.com/search-flights/MIA-SEA
How we measure this →

MIA to SEA questions

Is MIA–SEA running on time right now?

Significant delay risk. The departure side at MIA is the weaker end, route health score 50/100. The airports section above carries the live status and delay window at both ends.

Morning or evening flight on MIA–SEA?

Operators schedule evening departures around 18:22 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.

How long is the flight from MIA to SEA?

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.

How often does MIA–SEA fly?

3 carriers operate this route, around 21 flights a week between them. Compare carrier days and times in the airline list above.