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 May 2026, Alaska Airlines operated the most departures, one of 2 carriers flying nonstop MCI–SEA; the Boeing 737-900ER was the most common aircraft at 31% of departures; flights ran 81% full.
Departures
218
May 2026
Seats
35,181
both directions
Passengers
28,449
both directions
Load factor
80.9%
RPM ÷ ASM
Who flies MCI–SEA?
Alaska Airlines operated the most nonstop MCI–SEA departures in May 2026 (158), one of 2 carriers on the route.
- AS
158 departures · 27,572 seats
Share of departures72.5%80.6%
Load
- DL
60 departures · 7,609 seats
Share of departures27.5%81.8%
Load
What plane flies MCI–SEA?
In May 2026, the Boeing 737-900ER flew 31% of MCI–SEA departures — more than any other aircraft type.
- Boeing 737-900ER
68 departures · 79.4% load
31.2% - Boeing 737 MAX 9
58 departures · 81.6% load
26.6% - Airbus A220-300
51 departures · 82.5% load
23.4% - Boeing 737-800
24 departures · 80.8% load
11.0% - Airbus A220-100
9 departures · 76.4% load
4.1% - Boeing 737 MAX 8
8 departures · 83.5% load
3.7%
How has MCI–SEA traffic changed?
Nonstop MCI–SEA departures fell from 245 in June 2025 to 218 in May 2026.
Monthly nonstop MCI–SEA traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
June 2025
245 departures · 33,948 passengers
87.5%
Load
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
By direction
Each direction is filed separately — they rarely match.
SEA → MCI
74.6% full
110 departures · 13,259 passengers
MCI → SEA
87.3% full
108 departures · 15,190 passengers
Nonstop MCI–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 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 May 2026, the Boeing 737-900ER flew the largest share of departures (31.2%), followed by the Boeing 737 MAX 9 (26.6%).
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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