The U.S. aircraft register, updated daily
Routes and flights · the DOT's airline reports, August 2025 to July 2026

Seattle-Tacoma International ⇄ Miami International SEA–MIA

Airlines flew 2,646 flights between Seattle-Tacoma International SEA in Seattle, WA and Miami International MIA in Miami, FL in the twelve months to July 2026, both directions together: 377,280 passengers in 448,653 seats, 84% of them filled, and 19,893,655 pounds of freight. 2,724 miles, about 289 minutes in the air, on 8 airlines: American Airlines Inc. (899), Alaska Airlines Inc. (780), Delta Air Lines Inc. (716), China Airlines Ltd. (152) and 4 more. Planning to fly it yourself? The weather and winds along this route right now.

2,646
flights, twelve months
SEA-MIA: 1,295 · MIA-SEA: 1,351
377,280
passengers
84% of seats filled
2,724
miles
about 289 minutes airborne
8
airlines
9 aircraft types

Flights by month both directions

0671342012681/254/257/2510/251/264/262687/26
By month, as a table
flights
1/25218
2/25179
3/25198
4/25184
5/25197
6/25194
7/25200
8/25208
9/25200
10/25207
11/25206
12/25259
1/26222
2/26185
3/26201
4/26201
5/26230
6/26259
7/26268

Passengers by month

010,18820,37630,56540,7531/254/257/2510/251/264/2640,7537/26
By month, as a table
passengers
1/2531,446
2/2526,227
3/2528,211
4/2529,067
5/2530,174
6/2530,115
7/2531,308
8/2530,748
9/2525,211
10/2523,770
11/2528,406
12/2538,458
1/2632,365
2/2626,984
3/2630,378
4/2629,622
5/2633,052
6/2637,533
7/2640,753

The airlines twelve months, both directions

AirlineFlightsPassengersSeats filledService
American Airlines Inc. AA899150,29587%scheduled passenger service
Alaska Airlines Inc. AS780116,91785%charter passenger service, scheduled passenger service
Delta Air Lines Inc. DL716110,06879%scheduled passenger service
China Airlines Ltd. CI1520scheduled cargo service
Lan Colombia L7950scheduled cargo service
Atlas Air Inc. 5Y200%charter cargo service, charter passenger service
Kalitta Air LLC KAQ10charter cargo service
Sky Lease Cargo WI10charter cargo service

The aircraft as the airlines report their types

AircraftFlightsSeats a flightPassengers
Airbus Industrie A321-200n1,419195228,966
Boeing B737 Max 90049817875,810
Boeing 737-900ER19817829,667
Boeing B737 Max 80018617028,400
Boeing B777-F15300
Boeing 767-300/300ER9730
Boeing 737-800521616,983
Airbus Industrie A321Neoxlr421907,454
Boeing 747-400F100

SEA → MIA this direction alone · flown January 2025 to July 2026

1,295 flights of 1,208 scheduled, 194,578 passengers in 224,259 seats, 8,841,771 pounds of freight, 7,474 pounds of mail. American Airlines Inc. 448; Alaska Airlines Inc. 392; Delta Air Lines Inc. 357; Lan Colombia 95; Atlas Air Inc. 2; Kalitta Air LLC 1.

MIA → SEA this direction alone · flown January 2025 to July 2026

1,351 flights of 1,218 scheduled, 182,702 passengers in 224,394 seats, 11,051,884 pounds of freight, 2,252 pounds of mail. American Airlines Inc. 451; Alaska Airlines Inc. 388; Delta Air Lines Inc. 359; China Airlines Ltd. 152; Sky Lease Cargo 1.

Source: the Bureau of Transportation Statistics' T-100 Segment table (all carriers). A flight is one departure performed on this segment; seats and passengers are the airlines' own monthly reports; "seats filled" is passengers divided by seats. The miles are the DOT's great-circle distance. Both ends: Seattle-Tacoma International SEA and Miami International MIA; all routes.