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Tell FlyerIntel where and when you are flying. It will show how that route actually performs at that time of day and on that day of the week, what both airports are doing right now, and when to get to the airport.
ONT → SFO
Ontario to San Francisco · departing 6:00 PM
ONT → SFO flights departing 6–9 PM arrive on time 62.7% of the time, against 71.4% across the whole day — your departure window is 8.7 points worse than average for this route.
There is no day-by-hour view for ONT → SFO: it has too few flights to fill 45 weekday-and-hour slots with 120 or more each.
Other times on ONT → SFO
Time of day
On ONT → SFO, flights leaving 5–9 AM arrived on time 79.6% of the time, against 62.7% for those leaving 6–9 PM: 16.9 points more often.
- 5–9 AM79.6%
- 9 AM–12 PM65.9%
- 12–3 PM73.3%
- 3–6 PM74.9%
- 6–9 PM62.7%
- 9 PM–5 AM58.7%
Day of week
- Monday63.9%
- Tuesday77.0%
- Wednesday73.5%
- Thursday70.4%
- Friday70.1%
- Saturday77.6%
- Sunday69.3%
Bars start below the lowest figure so a real gap is visible; read the percentage, not the bar length. A time with too few flights to score is left unscored rather than guessed at.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · History describes what has happened on this route. It is not a prediction about your flight. Full route profile →
Which flight
Flights on ONT → SFO, the ones scheduled closest to 6:00 PM first.
| Flight | Usually departs | On time | Cancelled |
|---|---|---|---|
| F92677Frontier AirlinesLive map | 9:41 PM221 min away | 49.5% | 2.13% |
| UA1375United AirlinesLive map | 1:50 PM250 min away | 55.8% | 0.00% |
| F91159Frontier AirlinesLive map | 8:58 AM542 min away | 55.7% | 1.85% |
| UA2363United AirlinesLive map | 6:00 AM720 min away | 90.5% | 1.00% |
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · “Usually departs” is the scheduled time each flight number most often had over the period; airlines retime flights, so confirm the time on your booking. Flight numbers with fewer than 90 operations on this route are left out. This is history, not a forecast for your flight.
When to get to the airport
A starting point for ONT, not a promise about your day.
2h 0m before your 6:00 PM departure
How this was worked out
- FlyerIntel cannot currently obtain live security wait times for ONT, so this figure does not account for the queue on the day.
- It does not include your journey to the airport, parking, or a shuttle from a remote lot.
- International departures, and travel with children, checked pets or special assistance, need more time.
Both airports right now
Aviation weather is not currently a factor.
Minimal operational impact. Conditions are not a notable factor for operations right now.
UpdatedAviation weather is not currently a factor.
Minimal operational impact. Conditions are not a notable factor for operations right now.
UpdatedSource: NOAA Aviation Weather Center · Conditions describe the airfield, not your flight, and change quickly.
Other ways to make this journey
Airport pairings serving Los Angeles to San Francisco.
| Route | On time | Cancelled | Score |
|---|---|---|---|
| LAX→SFO Los Angeles to San Francisco | 69.3% | 0.67% | 55 |
| LAX→SJC Los Angeles to San Jose | 86.5% | 0.35% | 87 |
| SNA→SFO Santa Ana to San Francisco | 71.6% | 1.26% | 54 |
| BUR→SFO Burbank to San Francisco | 69.3% | 1.25% | 49 |
| BUR→OAK Burbank to Oakland | 86.6% | 1.52% | 81 |
| LAX→OAK Los Angeles to Oakland | 83.2% | 0.83% | 81 |
| SNA→SJC Santa Ana to San Jose | 86.6% | 0.93% | 86 |
| SNA→OAK Santa Ana to Oakland | 85.5% | 0.89% | 84 |
| BUR→SJC Burbank to San Jose | 87.1% | 1.48% | 83 |
| ONT→OAK Ontario to Oakland | 87.1% | 0.54% | 87 |
| ONT→SFO Ontario to San Francisco your route | 71.4% | 1.04% | 56 |
| ONT→SJC Ontario to San Jose | 86.8% | 0.26% | 87 |
Who flies this route
Performance by the carrier that actually operates the flight.
| Carrier | Flights | On time | Cancelled | Median delay |
|---|---|---|---|---|
| United Airlines | 1,918 | 76.5% | 0.47% | -6 min |
| SkyWest Airlines | 1,677 | 73.6% | 1.19% | -5 min |
| Frontier Airlines | 835 | 54.9% | 2.04% | 9 min |