Seattle (SEA) to Miami (MIA) flights
American Airlines, Alaska Airlines, Delta Air Lines fly nonstop from Seattle-Tacoma International Airport to Miami International Airport, with about 28 flights a week in July 2026. The 2,724-mile flight takes about 5h 46m gate to gate.
- Distance
- 2,724 mi · 4,384 km
- Flight time
- 5h 46m
- Airlines
- 3
- Seats filled
- 87%
Airlines flying SEA to MIA
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| American Airlines | 14 | Airbus A321, Boeing 737 MAX 8, Boeing 737-800 | 78,678 | 5h 35m |
| Alaska Airlines | 7 | Boeing 737 MAX 9, Boeing 737-900ER, Boeing 737-800 | 59,548 | 5h 52m |
| Delta Air Lines | 7 | Airbus A321, Boeing 737-800 | 56,352 | 5h 53m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
SEA to MIA flight schedule
5 flight numbers flew this route in August 2026, 3 of them almost daily. The first usually leaves at 8:05am and the last at 8:21pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| DL 506Delta Air Lines | 8:05am | 5:11pm | 31 | 81% |
| AS 305Alaska Airlines | 8:12am | 5:17pm | 31 | 79% |
| AA 654American Airlines | 12:56pm | 9:55pm | 4 | 80% |
| AA 1484American Airlines | 12:58pm | 10:02pm | 17 | 94% |
| AA 1471American Airlines | 8:21pm | 5:10am | 31 | 76% |
Is SEA to MIA on time?
From September 2025 to August 2026, 80% of 1,231 flights arrived within 15 minutes of schedule and 0.8% were cancelled. Flights leaving around 7am were the most punctual (88%), those around 10pm the least (73%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (46%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| American Airlines | 475 | 78% | 16 min | 0.8% |
| Alaska Airlines | 391 | 81% | 9 min | 0.3% |
| Delta Air Lines | 365 | 81% | 14 min | 1.4% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 7am to 8am | 184 | 88% | |
| 8am to 9am | 544 | 78% | |
| 12pm to 1pm | 68 | 87% | |
| 1pm to 2pm | 42 | 73% | |
| 8pm to 9pm | 164 | 79% | |
| 9pm to 10pm | 28 | 71% | |
| 10pm to 11pm | 162 | 73% | |
| 11pm to 12am | 36 | 91% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 93 | 16,256 | |
| September 2025 | 90 | 13,669 | |
| October 2025 | 92 | 13,400 | |
| November 2025 | 95 | 15,152 | |
| December 2025 | 119 | 20,515 | |
| January 2026 | 98 | 16,023 | |
| February 2026 | 83 | 13,998 | |
| March 2026 | 91 | 15,600 | |
| April 2026 | 89 | 14,913 | |
| May 2026 | 104 | 16,005 | |
| June 2026 | 119 | 18,838 | |
| July 2026 | 122 | 20,209 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.