San Francisco to Ontario 🇺🇸

Cheapest fare

$19

Fastest

1h 25m

Direct from

$19

Dates tracked

Cheapest fare

$19

Sat, Dec 12 · Direct · 1h 27m · Frontier Airlines

−61%

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$19 is cheaper than 83% of departure dates on this route.

This is a low price for this route.

$19$114

Price calendar

Cheapest one-way fare by departure day Cheap Average Pricey

October 2026

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Price trend

Cheapest fare we saw each day (last 90 days)Low $19 on Thu, Oct 22 · High $19

Price alert

Cheapest day to fly

Saturday

Averages $34, vs $67 on Tuesdays.

Work-hours calculator

This flight to Ontario costs you 1h 16m of work.

Your hourly pay$

Same money as

1
SUV fuel tanks
1
large pizzas
1
cinema tickets
3
fancy coffees

Airlines on this route

Frontier Airlines

from $19 · 12 dates

Destination guide

Discover Ontario

About Ontario

Ontario is a city in southwestern San Bernardino County, California, United States, 35 miles (56 km) east of downtown Los Angeles and 23 miles (37 km) west of downtown San Bernardino, the county seat. Located in the western part of the Inland Empire metropolitan area, it lies just east of Los Angeles County and is part of the Los Angeles metropolitan area. As of the 2020 census, the city had a population of 175,265.

Text from Wikipedia — Ontario, California, licensed CC BY-SA 4.0.

All dates

Every fare, by date

Departs	Return	Airline	Stops	Price
Thu, Oct 29	One way	Frontier Airlines	Direct	$79
Fri, Oct 30	Sun, Nov 1	Frontier Airlines	Direct	$188
Mon, Nov 2	Thu, Nov 5	Frontier Airlines	Direct	$130
Fri, Nov 6	Sun, Nov 8	Frontier Airlines	Direct	$110
Fri, Nov 6	Mon, Nov 9	Frontier Airlines

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