Frontier Airlines ONT to PDX on-time performance
Frontier Airlines nonstop flights from Ontario to Portland · Aug 2025 – Jul 2026
On-time arrivals
75%
arrived < 15 min late
Cancelled
0.0%
0 flights
Avg arrival delay
9 min
34 min when late
Rank on route
#3 of 3
route average 90% on time
Key facts
- Frontier Airlines flights on ONT to PDX arrived on time 75% of the time in Aug 2025 – Jul 2026.
- 0% were cancelled, and 3% arrived an hour or more late.
- That ranks #3 of 3 airlines on this route, which averaged 90% on time overall.
- The largest source of delay minutes was late-arriving aircraft (53%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft53%
- Air traffic control & airport congestion27%
- Airline (crew, maintenance, cleaning, fueling)20%
- Extreme weather0%
- Security0%
Other airlines on ONT to PDX
- Alaska Airlines92% on time · 6 min avg delay
- SkyWest Airlines92% on time · 6 min avg delay
Full ONT to PDX comparison →
Frontier Airlines on-time record across all routes →
60 Frontier Airlines flights tracked on this route; 0 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.