SFO → ONTSan Francisco to Ontario

live

Direct flights from San Francisco (SFO) to Ontario (ONT): 18 nonstop departures observed each week across 3 airlines. 67% of the last 6 operated flights arrived within 15 minutes of schedule. The median arrival is 4 minutes early. No cancellations were recorded across the 6 tracked flights. The nonstop covers 585 km, an estimated 1 hour 15 minutes in the air. Measured by Pro Flight Search from live flight boards at San Francisco and Ontario. Updated 10 October 2026 at 16:37 UTC.

SFO San Francisco smooth · +13
ONT Ontario smooth · +2
585 km · ~1h 15m est.
dep bank 08:40–21:2518x weekly
Runs mixed · 3 airlines · 18x weekly · nonstop
67% on time

of the last 6 operated SFO → ONT flights arrived within 15 minutes

Median arrival delay is −4 min. 0 of 6 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−4 minacross the last 6 operated legs
Flight time~1h 15mestimated from route distance
Weekly departures18x3 direct airlines on the leg

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Air CanadaFrontier AirlinesUnited Airlines

Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.

Who flies it

observed on the boards · 7 days
Air CanadaAC

Flights AC4322 varies daily

Frontier AirlinesF9

Flights F91160 18:02 Th Fr Su · F92678 18:02 Mo Fr

United AirlinesUA

Flights UA5763 08:40 Tu We Sa · UA2661 10:43 Mo Th Fr Su · UA5571 13:41 daily · UA5467 16:10 Mo Th Fr Su

History

operated legs · board outcomes
10-09AC4322departed−4
10-09F91160arrived+19
10-09UA2661arrived−16
10-09UA5467arrived−7
10-09UA552arrived+29
10-09UA5571arrived−30

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
SFOSan Francisco +13 min smooth ⛅ mostly cloudy · WSW 12 kt Full SFO delay board →
ONTOntario +2 min smooth 🌤 overcast · N 0 kt Full ONT delay board →

Weather lens

Current conditions put the pressure at SFO: 58% odds of a 15+ minute delay and around +25 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

How the San Francisco to Ontario route actually runs

Pro Flight Search records official board updates for nonstop SFO to ONT flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.

Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search — San Francisco (SFO) to Ontario (ONT) route reliability, measured from operated flights on official airport boards.

Canonical URL
https://proflightsearch.com/search-flights/SFO-ONT
How we measure this →

SFO to ONT questions

Is SFO–ONT running on time right now?

Some delays possible. The departure side at SFO is the weaker end, route health score 55/100. The airports section above carries the live status and delay window at both ends.

Morning or evening flight on SFO–ONT?

Operators schedule morning departures around 08:40 and evening departures around 18:02 from SFO. Earlier flights typically land before destination-airport delays accumulate later in the day; check the ONT delay card to confirm conditions when you'd arrive.

How long is the flight from SFO to ONT?

Great-circle distance is 585 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 71–80 min gate-to-gate on this route.

How often does SFO–ONT fly?

3 carriers operate this route, around 44 flights a week between them. Compare carrier days and times in the airline list above.