Alaska Airlines ONT to PDX on-time performance
Alaska Airlines nonstop flights from Ontario to Portland · Aug 2025 – Jul 2026
On-time arrivals
92%
arrived < 15 min late
Cancelled
0.9%
4 flights
Avg arrival delay
6 min
73 min when late
Rank on route
#1 of 3
route average 90% on time
Key facts
- Alaska Airlines flights on ONT to PDX arrived on time 92% of the time in Aug 2025 – Jul 2026.
- 0.9% were cancelled, and 3% arrived an hour or more late.
- That ranks #1 of 3 airlines on this route, which averaged 90% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (38%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)38%
- Late-arriving aircraft37%
- Air traffic control & airport congestion25%
- Extreme weather0%
- Security0%
Other airlines on ONT to PDX
- SkyWest Airlines92% on time · 6 min avg delay
- Frontier Airlines75% on time · 9 min avg delay
Full ONT to PDX comparison →
Alaska Airlines on-time record across all routes →
443 Alaska Airlines flights tracked on this route; 4 cancelled, 0 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.