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 July 2026, American Airlines operated the most departures, one of 3 carriers flying nonstop MIA–SEA; the Airbus A321neo was the most common aircraft at 48% of departures; flights ran 91% full.
Departures
245
July 2026
Seats
45,018
both directions
Passengers
40,753
both directions
Load factor
90.5%
RPM ÷ ASM
Who flies MIA–SEA?
American Airlines operated the most nonstop MIA–SEA departures in July 2026 (123), one of 3 carriers on the route.
- AA
123 departures · 22,620 seats
Share of departures50.2%91.7%
Load
- AS
62 departures · 10,760 seats
Share of departures25.3%88.8%
Load
- DL
60 departures · 11,638 seats
Share of departures24.5%89.9%
Load
What plane flies MIA–SEA?
In July 2026, the Airbus A321neo flew 48% of MIA–SEA departures — more than any other aircraft type.
- Airbus A321neo
118 departures · 90.5% load
48.2% - Boeing 737 MAX 8
69 departures · 92.2% load
28.2% - Boeing 737 MAX 9
36 departures · 87.5% load
14.7% - Boeing 737-900ER
10 departures · 87.7% load
4.1% - Boeing 737-800
8 departures · 91.4% load
3.3% - Airbus A321
4 departures · 97.5% load
1.6%
How has MIA–SEA traffic changed?
Nonstop MIA–SEA departures rose from 185 in August 2025 to 245 in July 2026.
Monthly nonstop MIA–SEA traffic, trailing 12 months through July 2026. Bars scale to the busiest month; months with no filed service show as zero.
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
July 2026
245 departures · 40,753 passengers
90.5%
Load
By direction
Each direction is filed separately — they rarely match.
MIA → SEA
90.8% full
123 departures · 20,544 passengers
SEA → MIA
90.3% full
122 departures · 20,209 passengers
Nonstop MIA–SEA traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through July 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 July 2026, the Airbus A321neo flew the largest share of departures (48.2%), followed by the Boeing 737 MAX 8 (28.2%).
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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