Cheap flights to Ontario

Compare recent fares, direct-flight schedules and destination airports

Ontario at a glance

Key facts about the city and the routes found in recent fare data.

Country

United States

City IATA code

ONT

Airports in fare data

1

Population

No data

Time zone

America/Los_Angeles

Cities with direct flights

9

Airlines in fare data

80

Cheapest air tickets to Ontario

Compare up to ten of the lowest recent fares to Ontario, for domestic and international routes.

Prices are based on searches made by real travelers during the last 48 hours and are not a public offer.

Direct flights airfares to Ontario

Current data shows direct routes to Ontario from 9 cities: San Francisco, Seattle, San Jose, Las Vegas, Oakland, Dallas, Guadalajara, Honolulu, and Tucson. Only recently observed offers are currently available for these routes, so their departure days should not be treated as a complete timetable.

Flight days and minimum fares are enriched with cached route data when available. Otherwise, we show the currently observed offers.

Recent searches found direct offers from San Francisco to Ontario with these airlines: Frontier Airlines. The listed days come from observed fares rather than a complete timetable.

Frontier Airlines

Frontier Airlines

San Francisco — Ontario

Observed: Fr

from $18

Flight prices to Ontario by month

Compare cached monthly fares to Ontario for 8 departure cities over the next year. Routes without saved price data are not shown.

The chart shows the saved monthly price trend from San Francisco to Ontario. Open the route page for full flight details.

December 2026
Lowest price
on average:
$21
June 2027
Highest price
on average:
$233
  • Avg Price
Price dynamics

Tickets from San Francisco to Ontario are getting more expensive each month. From October 2026 to June 2027, the increase reached 635%, with prices now at $233. It's unlikely to get cheaper than the current level.

Cheaper and more expensive periods

The most significant price increase was from February 2027 to June 2027 — up 242%. The best time to fly is November 2026–December 2026, when the average price is $28. In May 2027–June 2027, tickets cost around $216.

Best time to buy

Given the rising prices, it's best not to delay your purchase. Flying in November 2026–December 2026 can save you up to 87% compared to the most expensive months.

Price predictability

Price variation across months on this route is 66.7%. Your choice of departure month significantly affects the total flight cost.

Ontario airports

Airports in Ontario provide convenient connections to other regions and countries. Below you can find details about their location, facilities, and transport options to choose the best airport for arriving in or departing from Ontario.

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Cities near Ontario

Nearby cities with airports can help you compare alternative routes or plan a combined trip.

View of Bakersfield

Bakersfield

BFL

View of Fresno

Fresno

FAT

View of Long Beach

Long Beach

LGB

View of Merced

Merced

MCE

View of Modesto

Modesto

MOD

View of Mexicali

Mexicali

MXL

View of Santa Barbara

Santa Barbara

SBA

View of Santa Maria

Santa Maria

SMX

View of Tijuana

Tijuana

TIJ

View of Yuma

Yuma

YUM

Frequently asked questions about Ontario

Concise answers based on city details and fares found in recent searches.

The lowest recent price in our data is $18. The live price may change when you search.

Recent fare data contains 1 destination airport codes for Ontario. The airport section above has detailed information.

Recent offers include direct flights from 9 cities operated by 3 airlines. Availability depends on the date.

They come from searches made by real travelers during the last 48 hours. Treat them as a guide: the final price is confirmed by a new search.