Route Reliability
Seattle → Kansas City
SEA–MCI · 1,490 miles · Seattle–Tacoma International Airport to Kansas City International Airport
- 77%
- Arrive within 15 minutes
- 6 min
- Average arrival delay
- 1.0%
- Cancelled
- 1,132
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.Delta Air Lines78%364 flights
- 2.Alaska Airlines77%742 flights
Not enough history to rank: Southwest Airlines (26 flights). We rank airlines only after 100 flights on the route.
What the data says
Morning-you made the right choice.
SEA–MCI flights departing between 6–9 AM arrived on time 93% of the time, versus 69% between 12–3 PM.
Wednesday has been the better bet.
A small edge: 81% on time on Wednesdays against 74% on Saturdays.
Not much between Delta Air Lines and Alaska Airlines.
On this route they all land within 77% to 78% on time. Pick on schedule and price.
Ticking up lately.
SEA–MCI flights arrived on time 90% of the time over the last three months in the data, compared with 83% in the three months before that.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon78%(166 flights)
- Tue77%(149 flights)
- Wed81%(151 flights)
- Thu76%(161 flights)
- Fri76%(170 flights)
- Sat74%(140 flights)
- Sun77%(176 flights)
- 6–9 AM93%(176 flights)
- 9 AM–12 PM76%(186 flights)
- 12–3 PM69%(124 flights)
- 3–6 PM78%(332 flights)
- 6–9 PM70%(294 flights)
- 9 PM–12 AM—(1 flights)
Jun 66% → May 86% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 66% | 122 |
| July 2025 | 60% | 126 |
| August 2025 | 70% | 120 |
| September 2025 | 73% | 109 |
| October 2025 | 76% | 86 |
| November 2025 | 81% | 79 |
| December 2025 | 76% | 83 |
| January 2026 | 86% | 65 |
| February 2026 | 87% | 55 |
| March 2026 | 89% | 72 |
| April 2026 | 94% | 88 |
| May 2026 | 86% | 108 |
Keep nerding
Based on 1,132 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.