Kansas City (MCI) to Seattle (SEA) flights
Alaska Airlines, Delta Air Lines, Southwest Airlines fly nonstop from Kansas City International Airport to Seattle-Tacoma International Airport, with about 29 flights a week in July 2026. The 1,490-mile flight takes about 4h 0m gate to gate.
- Distance
- 1,490 mi · 2,398 km
- Flight time
- 4h 0m
- Airlines
- 3
- Seats filled
- 83%
Airlines flying MCI to SEA
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Alaska Airlines | 21 | Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737-800 | 107,896 | 4h 0m |
| Delta Air Lines | 7 | Airbus A220-100, Airbus A220-300 | 34,319 | 4h 0m |
| Southwest Airlines | <1 | Boeing 737-700 / MAX 7, Boeing 737 MAX 8, Boeing 737-800 | 2,523 | 3h 47m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
MCI to SEA flight schedule
5 flight numbers flew this route in August 2026, 3 of them almost daily. The first usually leaves at 6:02am and the last at 7:58pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| AS 563Alaska Airlines | 6:02am | 8:05am | 31 | 91% |
| DL 2105Delta Air Lines | 7:15am | 9:12am | 31 | 87% |
| WN 106Southwest Airlines | 1:10pm | 2:55pm | 4 | n/a |
| AS 418Alaska Airlines | 2:17pm | 4:17pm | 31 | 83% |
| AS 501Alaska Airlines | 7:58pm | 9:58pm | 17 | 78% |
Is MCI to SEA on time?
From September 2025 to August 2026, 85% of 1,126 flights arrived within 15 minutes of schedule and 1% were cancelled. Flights leaving around 2pm were the most punctual (91%), those around 7pm the least (69%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (45%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 745 | 85% | 11 min | 0.7% |
| Delta Air Lines | 364 | 87% | 11 min | 1.6% |
| Southwest Airlines | 17 | 59% | 17 min | 0% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 6am to 7am | 183 | 90% | |
| 7am to 8am | 469 | 88% | |
| 1pm to 2pm | 25 | 60% | |
| 2pm to 3pm | 238 | 91% | |
| 3pm to 4pm | 96 | 72% | |
| 7pm to 8pm | 112 | 69% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 120 | 15,528 | |
| September 2025 | 110 | 13,984 | |
| October 2025 | 85 | 10,762 | |
| November 2025 | 79 | 8,863 | |
| December 2025 | 85 | 10,909 | |
| January 2026 | 66 | 7,513 | |
| February 2026 | 55 | 6,716 | |
| March 2026 | 74 | 9,071 | |
| April 2026 | 89 | 10,070 | |
| May 2026 | 108 | 15,190 | |
| June 2026 | 123 | 17,252 | |
| July 2026 | 128 | 18,880 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.