SEA to MCI flight delays & on-time performance
Nonstop flights from Seattle–Tacoma International Airport to Kansas City International Airport · 1,490 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SEA or MCI right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Seattle (SEA) to Kansas City (MCI) arrived on time 80% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.9% were cancelled, and 6% arrived an hour or more late.
- Alaska Airlines was the most punctual airline here (83% on time); Delta Air Lines was the least (76%).
- Departures scheduled around 7am did best (95% on time); around 5pm did worst (76%).
- Wednesday was the most reliable day to fly (84% on time) and Friday the least (76%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (56%).
Which airline is most on time from SEA to MCI?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Alaska Airlines | 83% | 0.5% | 9 min | 3.6% | 749 |
| Delta Air Lines | 76% | 1.6% | 19 min | 9.6% | 364 |
| Southwest Airlines | 33% | 0.0% | 41 min | 16.7% | 18 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am95%85 flights
- 8am92%144 flights
- 9am81%110 flights
- 11am47%17 flights
- 1pm80%124 flights
- 3pm73%26 flights
- 5pm76%317 flights
- 6pm77%301 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday81%0.0% cancelled
- Tuesday83%0.7% cancelled
- Wednesday84%0.0% cancelled
- Thursday80%0.6% cancelled
- Friday76%1.7% cancelled
- Saturday81%2.0% cancelled
- Sunday78%1.2% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)56%
- Late-arriving aircraft30%
- Air traffic control & airport congestion13%
- Extreme weather2%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)90%
- Extreme weather10%
- Air traffic control & airport congestion0%
- Security0%
SEA to MCI: common questions
- How often are SEA to MCI flights on time?
- 80% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Seattle to Kansas City cancelled?
- 0.9% of scheduled flights were cancelled (10 of 1,131).
- How long are typical delays?
- Across all flights the average arrival delay was 13 min (early arrivals count as zero). Flights that were late arrived 58 min behind schedule on average, and 5.7% of flights were an hour or more late.
- How long is taxi time at SEA?
- Flights on this route spent 21 min taxiing from the gate to takeoff on average.
Related routes
Return trip: MCI to SEA — 85% on time
More flights from Seattle
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SEA → MCI, nonstop flights by US airlines that report to the DOT. How we calculate this.