Kansas City (MCI) to Seattle (SEA)
Flight time
≈ 3h 46m
Bearing
301° NW
Kansas City (MCI) to Seattle (SEA) is 1,486 miles (2,391 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies MCI–SEA
Filed traffic dataIn June 2026, Alaska Airlines operated the most departures, one of 3 carriers flying nonstop MCI–SEA; the Boeing 737-900ER was the most common aircraft at 34% of departures; flights ran 85% full.
Departures
246
June 2026
Seats
40,618
both directions
Passengers
34,630
both directions
Load factor
85.3%
RPM ÷ ASM
Who flies MCI–SEA?
Alaska Airlines operated the most nonstop MCI–SEA departures in June 2026 (179), one of 3 carriers on the route.
- AS
179 departures · 31,573 seats
Share of departures72.8%84.4%
Load
- DL
59 departures · 7,645 seats
Share of departures24.0%89.4%
Load
- WN
8 departures · 1,400 seats
Share of departures3.3%81.9%
Load
What plane flies MCI–SEA?
In June 2026, the Boeing 737-900ER flew 34% of MCI–SEA departures — more than any other aircraft type.
- Boeing 737-900ER
83 departures · 84.0% load
33.7% - Boeing 737 MAX 9
79 departures · 84.4% load
32.1% - Airbus A220-300
58 departures · 89.6% load
23.6% - Boeing 737-800
22 departures · 84.7% load
8.9% - Boeing 737 MAX 8
3 departures · 88.0% load
1.2% - Airbus A220-100
1 departures · 74.3% load
0.4%
How has MCI–SEA traffic changed?
Nonstop MCI–SEA departures fell from 257 in July 2025 to 246 in June 2026.
Monthly nonstop MCI–SEA traffic, trailing 12 months through June 2026. Bars scale to the busiest month; months with no filed service show as zero.
July 2025
257 departures · 35,113 passengers
87.5%
Load
August 2025
244 departures · 32,782 passengers
85.1%
Load
September 2025
219 departures · 28,166 passengers
81.5%
Load
October 2025
171 departures · 21,319 passengers
82.4%
Load
November 2025
158 departures · 17,486 passengers
73.4%
Load
December 2025
168 departures · 20,872 passengers
80.0%
Load
January 2026
132 departures · 14,083 passengers
72.8%
Load
February 2026
110 departures · 12,502 passengers
79.1%
Load
March 2026
147 departures · 17,829 passengers
81.2%
Load
April 2026
177 departures · 19,747 passengers
72.7%
Load
May 2026
218 departures · 28,449 passengers
80.9%
Load
June 2026
246 departures · 34,630 passengers
85.3%
Load
By direction
Each direction is filed separately — they rarely match.
MCI → SEA
84.8% full
123 departures · 17,252 passengers
SEA → MCI
85.7% full
123 departures · 17,378 passengers
Nonstop MCI–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 Kansas City (MCI) from Seattle (SEA)?
MCI to SEA is 1,486 miles (2,391 km / 1,291 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from MCI to SEA?
A nonstop covers the 1,486-mile great-circle distance in roughly 3h 46m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies MCI–SEA?
In June 2026, the Boeing 737-900ER flew the largest share of departures (33.7%), followed by the Boeing 737 MAX 9 (32.1%).
What mileage do I earn flying MCI–SEA?
Distance-based programs credit off the 1,486-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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