Flights Miami → Seattle
MIA → SEA
How long is the flight from Miami to Seattle?
The flight from Miami (MIA) to Seattle (SEA) takes 6h 2m on average. That is the median time recorded across 4 scheduled flights on this leg; the actual time varies by a few minutes with wind, routing and take-off queues.
Route overview
The flight route from Miami to Seattle operates with a Boeing 757 and has an on-time performance rate of 64%, with an average delay of 28.8 minutes per flight. Over the course of a year, this route sees approximately 267 flights, serving one of the busiest destination airports in terms of annual passenger traffic at 52,715,181 passengers.
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 Miami (MIA) → Seattle (SEA) route is operated by American Airlines. Across 722 flights monitored in recent months, 72% arrived on time (within 15 min of schedule), with an average delay of 20 minutes. The cancellation rate is 2.35%. FlightGuard's average computed risk is 26.2/100 (medium), updated in real time from weather, ATC delays, strikes, NOTAMs, fuel and flight history. At Seattle the average ATFM delay is 5.5 minutes (main cause: atfm). Departing from Miami the average ATFM delay is 5.5 minutes.
Heading to Seattle: what to expect in this direction
Flying from Miami (MIA) to Seattle (SEA) heads north-west for about 4,379 km, a flight time of roughly 6h 2m.
Departures from Miami on this leg cluster in the midday window: about 80% of MIA-SEA flights take off then.
Air-traffic congestion: departing Miami the average ATFM delay is 5.5 min (atfm); arriving into Seattle it is 5.5 min (atfm).
Across 722 tracked MIA-SEA flights, 72% left on time with an average delay of 20 min and a 2.4% 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 MIA-SEA
Airports
Frequently asked questions about MIA-SEA
The flight from Miami (MIA) to Seattle (SEA) takes 6h 2m on average. That is the median time recorded across 4 scheduled flights on this leg; the actual time varies by a few minutes with wind, routing and take-off queues.
On the Miami (MIA) -> Seattle (SEA) route, on-time performance is 72% with an average delay of 20 minutes, based on 722 tracked flights.
The cancellation rate on Miami-Seattle is 2.35% across 722 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 Seattle, 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.
