SEA → MIASeattle to Miami

live

Direct flights from Seattle (SEA) to Miami (MIA): 21 nonstop departures observed each week across 3 airlines. 60% of the last 5 operated flights arrived within 15 minutes of schedule. The median arrival is on schedule. 1 of the 5 tracked flights was cancelled. 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 Seattle and Miami. Updated 8 September 2026 at 21:42 UTC.

SEA Seattle smooth · +9
MIA Miami smooth · +0
4,379 km · ~6h 07m est.
dep bank 08:05–20:2121x weekly
Runs mixed · 3 airlines · 21x weekly · nonstop
60% on time

of the last 5 operated SEA → MIA flights arrived within 15 minutes

Median arrival delay is +0 min. 1 of 5 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival+0 minacross the last 5 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 08:13 daily

American AirlinesAA

Flights AA1471 20:21 daily

Delta Air LinesDL

Flights DL506 08:05 daily

History

operated legs · board outcomes
09-08AS305arrived+108
09-08DL506dep +35 → arr−12
09-07AA1471arrived+0
09-07DL506cancelledCNX
09-06AA1471arrived+0

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
SEASeattle +9 min smooth 🌤 few clouds · N 7 kt Full SEA delay board →
MIAMiami +0 min smooth 🌤 mostly cloudy · ESE 8 kt Full MIA delay board →

Weather lens

Current conditions put the pressure at SEA and MIA: 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 Seattle to Miami route actually runs

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

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

SEA to MIA questions

Is SEA–MIA running on time right now?

Smooth skies ahead. The departure side at SEA is the weaker end, route health score 93/100. The airports section above carries the live status and delay window at both ends.

Morning or evening flight on SEA–MIA?

Operators schedule morning departures around 08:05 and evening departures around 20:21 from SEA. Earlier flights typically land before destination-airport delays accumulate later in the day; check the MIA delay card to confirm conditions when you'd arrive.

How long is the flight from SEA to MIA?

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 SEA–MIA fly?

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