Best Time to Fly PDX to MCI: On-Time Stats by Hour & Airline
Portland International → Kansas City International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 82.3% of Portland (PDX) to Kansas City (MCI) flights arrived on time (347 scheduled flights). That is 4.7 points above the national average of 77.6%.
Among 2 airlines, Alaska Airlines led with 84.0% on time and Southwest Airlines was last with 66.7%.
Over 24 months, Wednesday was the most reliable day (90% on time) and July the worst month (74%).
The cancellation rate was 0.3% (US average 1.8%).
PDX to MCI on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Alaska Airlines | 84.0% | 53 min | 0.3% | 314 |
| Southwest Airlines | 66.7% | 33 min | 0.0% | 33 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PDX to MCI
On-time arrival % by scheduled departure hour (local time), 381 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | Limited data | 11 | |
| 8am–9am | Limited data | 9 | |
| 9am–10am | 97.0% | 0.0% | 33 |
| 10am–11am | 83.1% | 0.0% | 190 |
| 11am–12pm | 84.0% | 0.8% | 120 |
| 12pm–1pm | Limited data | 9 | |
| 1pm–2pm | Limited data | 1 | |
| 2pm–3pm | Limited data | 8 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on PDX to MCI
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 6 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 14 | ||
| Summer peak (Jun 15 - Aug 15) | 79.8% | -4.2 pts | 1.2% | 80 |
| All other days | 83.9% | — | 0.0% | 281 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).