● Deals from
● Sweeping every destination…
$22usually $54−59%16 Nov 2026 · direct · score 98/100 · Floor
Live check · This route is not on today’s below-usual board, so we re-scanned it just now: the current cheapest upcoming fare sits about 59% below its usual level.
Why so cheap?
Researching this route’s pricing right now — checking season, sales, capacity and route news…
Fares by departure date
Today’s fare is cheaper than 94% of the 16 fares tracked for this route.
Questions people ask about this route
- What is the lowest price for a flight from San Francisco to Ontario right now?
- The lowest price our scan found today (2026-10-13) is $22 one-way fare, departing 16 Nov 2026, direct. Fares move constantly — the link below re-checks live availability on Aviasales.
- Is $22 a good price for a San Francisco to Ontario flight (SFO→ONT)?
- Yes by the data: this route usually costs about $54 (midpoint of Google Flights' typical price range), so $22 is 59% below usual and cheaper than 94% of the 16 fares tracked for this route. FareFloor's deal score for it is 98/100 as of 2026-10-13.
- When is the cheapest time to fly from San Francisco to Ontario in the coming months?
- Across the departure windows our 2026-10-13 scan compared, the lowest-priced departure found is 16 Nov 2026 at $22 one-way fare. Method: we sweep this origin's destinations several times a day via Google Flights data and keep the cheapest round-trip window per route — a cheaper window can appear any day, so treat this as today's answer, not a permanent one.
- Is there a direct flight from San Francisco to Ontario at this price?
- Yes — the $22 fare found today is a direct flight.