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 May 2026, American Airlines operated the most departures, one of 3 carriers flying nonstop MIA–SEA; the Airbus A321neo was the most common aircraft at 66% of departures; flights ran 85% full.
Departures
207
May 2026
Seats
38,924
both directions
Passengers
33,052
both directions
Load factor
84.9%
RPM ÷ ASM
Who flies MIA–SEA?
American Airlines operated the most nonstop MIA–SEA departures in May 2026 (84), one of 3 carriers on the route.
- AA
84 departures · 16,380 seats
Share of departures40.6%87.6%
Load
- DL
62 departures · 11,958 seats
Share of departures30.0%83.8%
Load
- AS
61 departures · 10,586 seats
Share of departures29.5%81.9%
Load
What plane flies MIA–SEA?
In May 2026, the Airbus A321neo flew 66% of MIA–SEA departures — more than any other aircraft type.
- Airbus A321neo
136 departures · 85.9% load
65.7% - Boeing 737 MAX 9
33 departures · 82.1% load
15.9% - Boeing 737 MAX 8
12 departures · 84.8% load
5.8% - Boeing 737-900ER
12 departures · 80.7% load
5.8% - Boeing 737-800
8 departures · 80.0% load
3.9% - Airbus A321
6 departures · 89.2% load
2.9%
How has MIA–SEA traffic changed?
Nonstop MIA–SEA departures rose from 181 in June 2025 to 207 in May 2026.
Monthly nonstop MIA–SEA traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
June 2025
181 departures · 30,115 passengers
88.0%
Load
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
By direction
Each direction is filed separately — they rarely match.
SEA → MIA
81.9% full
104 departures · 16,005 passengers
MIA → SEA
88.0% full
103 departures · 17,047 passengers
Nonstop MIA–SEA traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through May 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 May 2026, the Airbus A321neo flew the largest share of departures (65.7%), followed by the Boeing 737 MAX 9 (15.9%).
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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