No delays reported for F9 3131 (IAH → ONT) as of 6:45 PM ET. It arrived on time 87.9% of the time in June-August 2026. When it was late, the average delay was 1h 16m. 1.1% of flights were cancelled. Right now there are no reported delays at IAH, ONT.
Looks on time
Next leg IAH → ONT, scheduled 6:10 AM local time. No delays at IAH right now, and it usually runs on time. Weather at IAH (53°F, rain, wind 17 kt gusting 25) could slow departures.
Cancellation risk: Medium 1.1% of its flights were cancelled in June-August 2026; rough weather at IAH.
Estimate from the schedule, live position and airport conditions, if this flight operates today. Check Frontier for official times.
Before you fly
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Route and schedule
| Leg | Scheduled | On time |
|---|---|---|
| IAH → ONT Houston, TX to Ontario, CA | 6:10 AM → 7:32 AM | 88% |
Local times. Schedules change; check your booking.
How reliable is F9 3131?
| Arrived on time (within 15 min) | 87.9% |
| Average delay when late | 76 min |
| Cancelled | 1.1% |
| Diverted | 0% |
| Flights tracked | 92 |
Best and worst days to fly F9 3131
F9 3131 was most reliable on Tuesdays (92% on time) and least reliable on Fridays (77%).
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Why it runs late
| Late-arriving plane | |
| Airline (crew, maintenance) | |
| Air traffic system | |
| Extreme weather |
Share of delay minutes by cause, as reported by Frontier to the Department of Transportation.
Other flights IAH → ONT
All flights on this route, ranked
Live status at its airports
We show airport-wide airport status, not this flight's gate or live position. For that, check the Frontier app.
Frontier delays and what you're owed · Airline phone numbers
About this data
On-time history: U.S. Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, June-August 2026. Live conditions: live airport status. "On time" means arriving within 15 minutes of schedule.
Common questions
Is F9 3131 delayed today?
Right now there are no reported delays at IAH, ONT. Checked 6:45 PM ET. For this flight's gate and exact status, check the Frontier app.
Is F9 3131 usually on time?
F9 3131 arrived within 15 minutes of schedule 87.9% of the time in June-August 2026, with an average delay of 76 minutes when late.
How often is F9 3131 cancelled?
1.1% of F9 3131 flights were cancelled in June-August 2026.