Route
SEA → MCI
Seattle–Tacoma International Airport Kansas City International Airport
1,490 miles
Return route MCI → SEA →
How punctual is this route?
- On-time arrivals
- 81.2%
- Less than 15 minutes late
- Cancelled
- 0.8%
- Of scheduled flights
- Average delay when late
- 64 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,126
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 54%
- Late-arriving aircraft 32%
- Air traffic control & airport 12%
- Extreme weather 2%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 72.5% | 111 |
| October 2025 | 75.6% | 88 |
| November 2025 | 79.7% | 79 |
| December 2025 | 74.7% | 85 |
| January 2026 | 86.2% | 67 |
| February 2026 | 87.3% | 56 |
| March 2026 | 87.5% | 75 |
| April 2026 | 94.3% | 90 |
| May 2026 | 86.1% | 109 |
| June 2026 | 81.3% | 123 |
| July 2026 | 78.0% | 127 |
| August 2026 | 78.9% | 116 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Alaska Airlines | 745 | 84.3% | 0.4% | 51 min |
| Delta Air Lines | 364 | 77.4% | 1.6% | 80 min |
| Southwest Airlines | 17 | 29.4% | 0.0% | 76 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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