Seattle (SEA) to Kansas City (MCI) flights
Alaska Airlines, Delta Air Lines, Southwest Airlines fly nonstop from Seattle-Tacoma International Airport to Kansas City International Airport, with about 29 flights a week in July 2026. The 1,490-mile flight takes about 3h 24m gate to gate.
- Distance
- 1,490 mi · 2,398 km
- Flight time
- 3h 24m
- Airlines
- 3
- Seats filled
- 80%
Airlines flying SEA to MCI
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Alaska Airlines | 21 | Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737-800 | 106,605 | 3h 25m |
| Delta Air Lines | 7 | Airbus A220-100, Airbus A220-300 | 30,090 | 3h 23m |
| Southwest Airlines | <1 | Boeing 737 MAX 8, Boeing 737-800, Boeing 737-700 / MAX 7 | 2,682 | 3h 25m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
SEA to MCI flight schedule
6 flight numbers flew this route in August 2026, 2 of them almost daily. The first usually leaves at 7:48am and the last at 6:27pm. 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 418Alaska Airlines | 7:48am | 1:21pm | 18 | 89% |
| AS 501Alaska Airlines | 8:14am | 1:52pm | 13 | 98% |
| AS 497Alaska Airlines | 1:30pm | 7:01pm | 31 | 80% |
| WN 139Southwest Airlines | 3:05pm | 8:30pm | 4 | n/a |
| DL 2256Delta Air Lines | 5:30pm | 11:02pm | 31 | 77% |
| AS 564Alaska Airlines | 6:27pm | 11:59pm | 17 | 80% |
Is SEA to MCI on time?
From September 2025 to August 2026, 81% of 1,126 flights arrived within 15 minutes of schedule and 0.8% were cancelled. Flights leaving around 7am were the most punctual (94%), those around 5pm the least (77%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (52%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 745 | 84% | 8 min | 0.4% |
| Delta Air Lines | 364 | 77% | 18 min | 1.6% |
| Southwest Airlines | 17 | 29% | 54 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 |
|---|---|---|---|
| 7am to 8am | 103 | 94% | |
| 8am to 9am | 156 | 92% | |
| 9am to 10am | 82 | 80% | |
| 1pm to 2pm | 117 | 80% | |
| 3pm to 4pm | 26 | 58% | |
| 5pm to 6pm | 317 | 77% | |
| 6pm to 7pm | 306 | 80% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 122 | 16,843 | |
| September 2025 | 109 | 14,182 | |
| October 2025 | 86 | 10,557 | |
| November 2025 | 79 | 8,623 | |
| December 2025 | 83 | 9,963 | |
| January 2026 | 66 | 6,570 | |
| February 2026 | 55 | 5,786 | |
| March 2026 | 73 | 8,758 | |
| April 2026 | 88 | 9,677 | |
| May 2026 | 110 | 13,259 | |
| June 2026 | 123 | 17,378 | |
| July 2026 | 129 | 18,250 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.