81% of flights from Portland to Kansas City arrived on time over the past 12 months. That is about the typical U.S. route. The 10 a.m. departures ran on time 82% of the time; the 11 a.m. ones 80%. 4% of flights arrived more than an hour late or not at all.
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for PDX → MCI: when a flight was late, it was under 45 minutes late 75% of the time. About 1 in 29 flights landed an hour or more late, and 1 in 93 three hours or more; 0.3% were cancelled outright.
- On time or early81%
- 15–30 min late9.4%
- 30–60 min late5.6%
- 1–2 hours late1.6%
- 2–3 hours late0.8%
- 3+ hours late1.1%
- Diverted0.3%
- Cancelled0.3%
Share of all 372 scheduled flights, past 12 months, by arrival time against schedule.
By airline
| Airline | Flights | On time | Cancelled | Typical arrival | 1h+ late | Avg when late | Operated by |
|---|---|---|---|---|---|---|---|
| Alaska Airlines | 338 | 83% | 0.3% | −7 min | 3.6% | +50 min | Alaska Airlines 99%, Horizon Air 1% |
| Southwest Airlines | 34 | — | — | — | — | — | Southwest Airlines |
Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.
Best time of day to fly
On-time rate by scheduled departure hour (local time at PDX). Delays build through the day as late planes knock on, so early flights usually do best.
By airline and hour
| Departs | Alaska Airlines |
|---|---|
| 10 a.m. | 81% |
| 11 a.m. | 80% |
By month
Each calendar month pooled over 2023–2026. Best: August (88%). Worst: July (80%).
By day of week
| Day | Flights | On time | Cancelled |
|---|---|---|---|
| Monday | 53 | — | — |
| Tuesday | 49 | — | — |
| Wednesday | 42 | — | — |
| Thursday | 51 | — | — |
| Friday | 51 | — | — |
| Saturday | 57 | — | — |
| Sunday | 69 | — | — |
Why flights were late
Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.
Cancellations: airline 1
Month by month
Not enough months with data to draw a trend.
Questions
How often are flights from PDX to MCI on time?
81% of 372 scheduled flights from Portland, OR to Kansas City, MO arrived within 15 minutes of schedule between September 2025 and August 2026. 0.3% were cancelled.
What is the best time of day to fly PDX to MCI?
Flights scheduled to leave at 10 a.m. were the most reliable (82% on time). The 11 a.m. departures were the least (80%).
What month has the most delays from PDX to MCI?
July (80% on time). The best month is August (88%), over 2023–2026.
Related
- MCI → PDX (return)
- Portland (PDX) delays by hour
- Flights into Kansas City (MCI)
- Alaska Airlines on-time record
- Southwest Airlines on-time record
- Connecting off this flight? Check the risk
Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.