Best Time to Fly MCI to PDX: On-Time Stats by Hour & Airline
Kansas City International → Portland International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 86.6% of Kansas City (MCI) to Portland (PDX) flights arrived on time (347 scheduled flights). That is 9.0 points above the national average of 77.6%.
Alaska Airlines was the most punctual of the 2 airlines on the route at 89.7%, while Southwest Airlines trailed at 57.6%.
May has been the best month (90% on time) and Saturday the weakest day of the week (80%).
0.6% of flights were cancelled, versus 1.8% nationally.
MCI to PDX 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 | 89.7% | 74 min | 0.6% | 314 |
| Southwest Airlines | 57.6% | 46 min | 0.0% | 33 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MCI to PDX
On-time arrival % by scheduled departure hour (local time), 381 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 9am–10am | Limited data | 1 | |
| 12pm–1pm | Limited data | 9 | |
| 1pm–2pm | Limited data | 26 | |
| 3pm–4pm | 82.9% | 0.0% | 42 |
| 4pm–5pm | 86.8% | 0.9% | 115 |
| 5pm–6pm | 88.8% | 0.6% | 179 |
| 7pm–8pm | Limited data | 9 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MCI to PDX
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) | 76.0% | -12.9 pts | 1.2% | 80 |
| All other days | 88.9% | — | 0.4% | 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).