Miami (MIA) to Seattle (SEA)
Flight time
≈ 6h 15m
Bearing
314° NW
Miami (MIA) to Seattle (SEA) is 2,721 miles (4,379 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies MIA–SEA
Filed traffic dataIn June 2026, American Airlines operated the most departures, one of 3 carriers flying nonstop MIA–SEA; the Airbus A321neo was the most common aircraft at 51% of departures; flights ran 85% full.
Departures
239
June 2026
Seats
43,961
both directions
Passengers
37,533
both directions
Load factor
85.4%
RPM ÷ ASM
Who flies MIA–SEA?
American Airlines operated the most nonstop MIA–SEA departures in June 2026 (119), one of 3 carriers on the route.
- AA
119 departures · 22,022 seats
Share of departures49.8%87.2%
Load
- AS
60 departures · 10,302 seats
Share of departures25.1%82.7%
Load
- DL
60 departures · 11,637 seats
Share of departures25.1%84.3%
Load
What plane flies MIA–SEA?
In June 2026, the Airbus A321neo flew 51% of MIA–SEA departures — more than any other aircraft type.
- Airbus A321neo
122 departures · 84.7% load
51.0% - Boeing 737 MAX 8
63 departures · 89.1% load
26.4% - Boeing 737 MAX 9
26 departures · 80.3% load
10.9% - Boeing 737-800
12 departures · 80.8% load
5.0% - Boeing 737-900ER
12 departures · 86.7% load
5.0% - Airbus A321
4 departures · 93.4% load
1.7%
How has MIA–SEA traffic changed?
Nonstop MIA–SEA departures rose from 182 in July 2025 to 239 in June 2026.
Monthly nonstop MIA–SEA traffic, trailing 12 months through June 2026. Bars scale to the busiest month; months with no filed service show as zero.
July 2025
182 departures · 31,308 passengers
90.8%
Load
August 2025
185 departures · 30,748 passengers
88.0%
Load
September 2025
180 departures · 25,211 passengers
74.1%
Load
October 2025
184 departures · 23,770 passengers
68.7%
Load
November 2025
190 departures · 28,406 passengers
79.8%
Load
December 2025
239 departures · 38,458 passengers
86.7%
Load
January 2026
202 departures · 32,365 passengers
85.3%
Load
February 2026
167 departures · 26,984 passengers
85.6%
Load
March 2026
179 departures · 30,378 passengers
89.6%
Load
April 2026
179 departures · 29,622 passengers
87.5%
Load
May 2026
207 departures · 33,052 passengers
84.9%
Load
June 2026
239 departures · 37,533 passengers
85.4%
Load
By direction
Each direction is filed separately — they rarely match.
MIA → SEA
84.7% full
120 departures · 18,695 passengers
SEA → MIA
86.1% full
119 departures · 18,838 passengers
Nonstop MIA–SEA traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through June 2026; filings from 2025. Public domain (US Government work).
The airports
Frequently asked
How far is Miami (MIA) from Seattle (SEA)?
MIA to SEA is 2,721 miles (4,379 km / 2,365 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from MIA to SEA?
A nonstop covers the 2,721-mile great-circle distance in roughly 6h 15m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies MIA–SEA?
In June 2026, the Airbus A321neo flew the largest share of departures (51.0%), followed by the Boeing 737 MAX 8 (26.4%).
What mileage do I earn flying MIA–SEA?
Distance-based programs credit off the 2,721-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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