Milwaukee (MKE) to Seattle (SEA)
Flight time
≈ 4h 11m
Bearing
293° NW
Milwaukee (MKE) to Seattle (SEA) is 1,690 miles (2,719 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies MKE–SEA
Filed traffic dataIn June 2026, Alaska Airlines operated the most departures, one of 2 carriers flying nonstop MKE–SEA; the Boeing 737-900ER was the most common aircraft at 50% of departures; flights ran 86% full.
Departures
119
June 2026
Seats
21,051
both directions
Passengers
18,134
both directions
Load factor
86.1%
RPM ÷ ASM
Who flies MKE–SEA?
Alaska Airlines operated the most nonstop MKE–SEA departures in June 2026 (118), one of 2 carriers on the route.
- AS
118 departures · 20,817 seats
Share of departures99.2%86.1%
Load
- DL
1 departures · 234 seats
Share of departures0.8%93.2%
Load
What plane flies MKE–SEA?
In June 2026, the Boeing 737-900ER flew 50% of MKE–SEA departures — more than any other aircraft type.
- Boeing 737-900ER
59 departures · 85.5% load
49.6% - Boeing 737 MAX 9
48 departures · 87.6% load
40.3% - Boeing 737-800
10 departures · 81.6% load
8.4% - Boeing 757-300
1 departures · 93.2% load
0.8% - Boeing 737 MAX 8
1 departures · 88.8% load
0.8%
How has MKE–SEA traffic changed?
Nonstop MKE–SEA departures fell from 125 in July 2025 to 119 in June 2026.
Monthly nonstop MKE–SEA traffic, trailing 12 months through June 2026. Bars scale to the busiest month; months with no filed service show as zero.
July 2025
125 departures · 18,675 passengers
88.4%
Load
August 2025
123 departures · 19,374 passengers
91.0%
Load
September 2025
120 departures · 16,058 passengers
76.1%
Load
October 2025
67 departures · 8,953 passengers
80.3%
Load
November 2025
66 departures · 8,676 passengers
75.3%
Load
December 2025
82 departures · 11,729 passengers
82.6%
Load
January 2026
49 departures · 6,234 passengers
72.0%
Load
February 2026
36 departures · 4,876 passengers
77.7%
Load
March 2026
51 departures · 7,949 passengers
88.7%
Load
April 2026
71 departures · 9,652 passengers
76.4%
Load
May 2026
114 departures · 15,792 passengers
78.9%
Load
June 2026
119 departures · 18,134 passengers
86.1%
Load
By direction
Each direction is filed separately — they rarely match.
SEA → MKE
86.9% full
60 departures · 9,260 passengers
MKE → SEA
85.3% full
59 departures · 8,874 passengers
Nonstop MKE–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 Milwaukee (MKE) from Seattle (SEA)?
MKE to SEA is 1,690 miles (2,719 km / 1,468 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from MKE to SEA?
A nonstop covers the 1,690-mile great-circle distance in roughly 4h 11m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies MKE–SEA?
In June 2026, the Boeing 737-900ER flew the largest share of departures (49.6%), followed by the Boeing 737 MAX 9 (40.3%).
What mileage do I earn flying MKE–SEA?
Distance-based programs credit off the 1,690-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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