Alaska Airlines PDX to ONT on-time performance
Alaska Airlines nonstop flights from Portland to Ontario · Aug 2025 – Jul 2026
On-time arrivals
85%
arrived < 15 min late
Cancelled
0.7%
3 flights
Avg arrival delay
9 min
52 min when late
Rank on route
#1 of 3
route average 84% on time
Key facts
- Alaska Airlines flights on PDX to ONT arrived on time 85% of the time in Aug 2025 – Jul 2026.
- 0.7% were cancelled, and 4% arrived an hour or more late.
- That ranks #1 of 3 airlines on this route, which averaged 84% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (62%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)62%
- Late-arriving aircraft22%
- Air traffic control & airport congestion14%
- Extreme weather1%
- Security1%
Other airlines on PDX to ONT
- SkyWest Airlines82% on time · 10 min avg delay
- Frontier Airlines78% on time · 14 min avg delay
Full PDX to ONT comparison →
Alaska Airlines on-time record across all routes →
444 Alaska Airlines flights tracked on this route; 3 cancelled, 1 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.