Kansas City (MCI) to Seattle (SEA)

1,486mi
2,391 km1,291 nm

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.

Route map: MCI → SEAMCISEA

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What actually flies MCI–SEA

Filed traffic data

In July 2026, Alaska Airlines operated the most departures, one of 5 carriers flying nonstop MCI–SEA; the Boeing 737 MAX 9 was the most common aircraft at 35% of departures; flights ran 87% full.

Departures

257

July 2026

Seats

42,631

both directions

Passengers

37,130

both directions

Load factor

87.1%

RPM ÷ ASM

Who flies MCI–SEA?

Alaska Airlines operated the most nonstop MCI–SEA departures in July 2026 (185), one of 5 carriers on the route.

What plane flies MCI–SEA?

In July 2026, the Boeing 737 MAX 9 flew 35% of MCI–SEA departures — more than any other aircraft type.

How has MCI–SEA traffic changed?

Nonstop MCI–SEA departures rose from 244 in August 2025 to 257 in July 2026.

Monthly nonstop MCI–SEA traffic, trailing 12 months through July 2026. Bars scale to the busiest month; months with no filed service show as zero.

  • 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

  • July 2026

    257 departures · 37,130 passengers

    87.1%

    Load

By direction

Each direction is filed separately — they rarely match.

SEA → MCI

85.2% full

129 departures · 18,250 passengers

MCI → SEA

89.0% full

128 departures · 18,880 passengers

Nonstop MCI–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

MCI

Kansas City

US

Kansas City International Airport

Coordinates

39.30°N, 94.71°W

Hemisphere

N · W

SEA

Seattle

US

Seattle–Tacoma International Airport

Coordinates

47.45°N, 122.31°W

Hemisphere

N · W

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 July 2026, the Boeing 737 MAX 9 flew the largest share of departures (35.4%), followed by the Boeing 737-900ER (35.4%).

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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