Flights Seattle → Miami
SEA → MIA
How long is the flight from Seattle to Miami?
The flight from Seattle (SEA) to Miami (MIA) takes 5h 15m on average. That is the median time recorded across 1 scheduled flight on this leg; the actual time varies by a few minutes with wind, routing and take-off queues.
Route overview
The flight route from Seattle to Miami operates with a high level of punctuality, achieving an on-time performance rate of 83%. Over the course of 267 flights, the average delay is only 8.2 minutes, and the route uses Boeing 757 aircraft. The destination airport in Miami serves over 50 million passengers annually, making it one of the busiest airports in the United States.
Your rights on this US flight (DOT)
US flights have no statutory cash compensation for delays. Under the US DOT rules, if your flight is cancelled or significantly changed and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Amenities for controllable delays depend on each airline's contract of carriage.
US flight refund rules & checker →General information, not legal advice.
The Seattle (SEA) → Miami (MIA) route is operated by American Airlines. Across 694 flights monitored in recent months, 80% arrived on time (within 15 min of schedule), with an average delay of 11 minutes. The cancellation rate is 1.87%. FlightGuard's average computed risk is 24.3/100 (medium), updated in real time from weather, ATC delays, strikes, NOTAMs, fuel and flight history. At Miami the average ATFM delay is 5.5 minutes (main cause: atfm). Departing from Seattle the average ATFM delay is 5.5 minutes.
Heading to Miami: what to expect in this direction
Flying from Seattle (SEA) to Miami (MIA) heads east for about 4,379 km, a flight time of roughly 5h 15m.
Departures from Seattle on this leg cluster in the overnight window: about 62% of SEA-MIA flights take off then.
Air-traffic congestion: departing Seattle the average ATFM delay is 5.5 min (atfm); arriving into Miami it is 5.5 min (atfm).
Across 694 tracked SEA-MIA flights, 80% left on time with an average delay of 11 min and a 1.9% cancellation rate.
Route facts
Flights on this route
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Airline punctuality on this route
| Airline | On-time | Average delay | Cancellations |
|---|---|---|---|
| American Airlines (AA) | 79% | 6 min | 1.1% |
Airlines operating SEA-MIA
Airports
Frequently asked questions about SEA-MIA
The flight from Seattle (SEA) to Miami (MIA) takes 5h 15m on average. That is the median time recorded across 1 scheduled flight on this leg; the actual time varies by a few minutes with wind, routing and take-off queues.
On the Seattle (SEA) -> Miami (MIA) route, on-time performance is 80% with an average delay of 11 minutes, based on 694 tracked flights.
The cancellation rate on Seattle-Miami is 1.87% across 694 monitored flights.
The route is operated by 1 airline: American Airlines.
Enter your flight number on FlightGuard for a real-time analysis based on 9 factors: weather at Miami, ATC delays, strikes, NOTAMs, fuel, airline punctuality and recent trends.
US flights have no statutory cash compensation for delays. Under US DOT rules, if the airline cancels or significantly changes your flight and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Meals or hotels for controllable delays depend on each airline's contract of carriage.
