Flight Reliability
F9 3335 · Frontier Airlines
Ontario → Portland (ONT–PDX)
85
Pretty Reliable
WanderNerd Reliability Score
- 77%
- Arrive within 15 minutes
- 1 min early
- Average arrival delay
- 0%
- Cancelled
- 7 min early
- Median arrival delay
Based on 109 historical flights. Data through May 2026.
What the data says
12–3 PM has a slight edge.
Departures between 12–3 PM arrived on time 78% of the time, against 74% between 3–6 PM.
Friday is doing you no favors.
F9 3335 arrived on time 91% of the time on Thursdays and just 67% on Fridays. That gap is worth planning around.
Lagging the ONT–PDX route.
F9 3335 arrived on time 77% of the time, versus 90% across the ONT–PDX route.
A bit ahead of the Frontier Airlines network.
F9 3335 arrived on time 77% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon74%(27 flights)
- Tue—(9 flights)
- Wed—(1 flights)
- Thu91%(11 flights)
- Fri67%(24 flights)
- Sat80%(10 flights)
- Sun85%(27 flights)
- 6–9 AM77%(30 flights)
- 12–3 PM78%(60 flights)
- 3–6 PM74%(19 flights)
92%
Nov
Jun 83% → Nov 92% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 83% | 23 |
| July 2025 | 77% | 26 |
| August 2025 | 62% | 21 |
| September 2025 | 92% | 13 |
| October 2025 | 62% | 13 |
| November 2025 | 92% | 12 |
- Departures on time
- 80%
- Diverted
- 0%
- Flights flown
- 109
- Months covered
- 7
Same route, other flights
Keep nerding
Based on 109 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.