ONT → SFOOntario to San Francisco

live

Direct flights from Ontario (ONT) to San Francisco (SFO): 81 nonstop departures observed each week across 6 airlines. 89% of the last 18 tracked flights arrived within 15 minutes of schedule. The median arrival is on schedule. No cancellations were recorded across the 23 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 Ontario and San Francisco. Updated 6 November 2026 at 17:39 UTC.

Today, ONT → SFO

Fri 6 Nov · local times
  1. 06:00 UA2363United Left 06:11 +11 Landed 07:24 −6
  2. 08:01 LXJ556Flexjet Est. 08:01Departure not confirmed by the board ·
  3. 09:25 UA432United On scheduleT2 SFO est. 10:51sched 10:55
  4. · AC4015Air Canada On schedule SFO 15:05scheduled
  5. · AC4080Air Canada Departed Landed 07:24 −6
  6. · AC4112Air Canada On schedule SFO 20:10scheduled
  7. · AC4121Air Canada On schedule SFO est. 10:51sched 10:55
  8. · AC4285Air Canada On schedule SFO 17:50scheduled
  9. · CM2528Copa Airlines On schedule SFO 20:10scheduled
  10. · Y42186Volaris On schedule SFO 13:36scheduled

Checked ONT board 06:18 · SFO board 09:39

ONT Ontario smooth · +10
SFO San Francisco smooth · +0
585 km · ~1h 15m est.
dep bank 06:00–20:1081x weekly
Runs reliable · 6 airlines · 81x weekly · nonstop
89% on time

of the last 18 tracked ONT → SFO flights arrived within 15 minutes

Median arrival delay is +0 min. 0 of 23 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival+0 minacross the last 18 arrivals
Flight time~1h 15mestimated from route distance
Weekly departures81x6 direct airlines on the leg
Cancelled0.0%recent route rate · 0 of 23

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Air CanadaCopa AirlinesDelta Air LinesFrontier 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 CanadaAC86% on time

Flights AC4080 07:30 daily · AC4112 varies Mo We Th Fr Sa Su · AC4121 10:55 daily · AC4015 15:05 daily

Copa AirlinesCM

Flights CM1360 15:05 Tu We Th Su · CM2529 17:50 Tu We Th Su · CM2528 20:10 Th Fr Su

Delta Air LinesDL

Flights DL4699 18:37 Th Su

Frontier AirlinesF9

Flights F91159 12:01 Mo Th Fr Su

United AirlinesUA83% on time

Flights UA2363 06:00 daily · UA432 09:25 daily · UA1375 13:35 daily · UA5577 16:17 Mo Tu We Th Fr Su

VolarisY4

Flights Y42186 13:36 Mo Th Fr Su

History

operated legs · board outcomes
11-06AC4080arrived−6
11-06UA2363dep +11 → arr−6
11-05AC4015arrived+0
11-05AC4080arrived−14
11-05AC4112arrived+14
11-05AC4121arrived+34
11-05AC4285arrived−5
11-05CM1360arrived+0
11-05CM2528arrived+14
11-05CM2529arrived−5
11-05DL4699departed+17
11-05F91159dep +14 → arr+15
11-05UA1375dep +9 → arr+0
11-05UA2363dep +10 → arr−14
11-05UA432dep +10 → arr+34
11-05UA4699arrived+14
11-05UA5577dep +21 → arr−5
11-05Y42186arrived+15
11-04AC4015arrived−21
11-04UA1375departed+4
11-04UA2363departed+16
11-04UA432departed+7
11-04UA5577departed+17

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
ONTOntario +10 min smooth 🌤 clear · W 3 kt Full ONT delay board →
SFOSan Francisco +0 min smooth 🌤 scattered clouds · N 0 kt Full SFO delay board →

Weather lens

Conditions are tightest at ONT and SFO: a 46% chance of a 15+ minute delay. In this weather, the more delayed of the two airports is typically about +10 min. Both figures come from the two airports' delay records in similar weather. See live delays → · Weather risk by airport →

How the Ontario to San Francisco route actually runs

Pro Flight Search records official board updates for nonstop ONT to SFO 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: Ontario (ONT) to San Francisco (SFO) route reliability, measured from operated flights on official airport boards.

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

ONT to SFO questions

Is ONT–SFO running on time right now?

Smooth skies ahead. The departure side at ONT is the weaker end, route health score 93/100. The airports section above carries the live status and delay window at both ends.

Morning or evening flight on ONT–SFO?

Operators schedule morning departures around 06:00 and evening departures around 18:37 from ONT. Earlier flights typically land before destination-airport delays accumulate later in the day; check the SFO delay card to confirm conditions when you'd arrive.

How long is the flight from ONT to SFO?

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 ONT–SFO fly?

6 carriers operate this route, around 81 flights a week between them. Compare carrier days and times in the airline list above.