Question 1

How long does a flight from Ontario to San Francisco take?

Accepted Answer

A direct flight to San Francisco will take on average 1h 31m to travel the 941 km flying distance from Ontario. Visit our flight page for the latest deals!>/a>

Question 2

How many flights are there between Ontario and San Francisco per day?

Accepted Answer

Each day, there are between 2 and 4 nonstop flights that take off from Ontario and land in San Francisco, with an average flight time of 1h 35m. The most common departure time is 6:00 p.m. and most flights take off in the evening. Each week, there are 21 flights. The most frequent day of departure is Monday, when 19% of all weekly flights depart. The fewest flights depart on a Wednesday. Visit our flight page for the latest deals!>/a>

Question 3

How many flights are there between Ontario and San Francisco per day?

Accepted Answer

Each day, there are between 2 and 4 nonstop flights that take off from Ontario and land in San Francisco, with an average flight time of 1h 35m. The most common departure time is 6:00 p.m. and most flights take off in the evening. Each week, there are 21 flights. The most frequent day of departure is Monday, when 19% of all weekly flights depart. The fewest flights depart on a Wednesday. Visit our flight page for the latest deals!>/a>

Question 4

What is the cheapest flight from Ontario to San Francisco?

Accepted Answer

In the last 3 days, the lowest price for a flight from Ontario to San Francisco was C$ 102 for a one-way ticket and C$ 232 for a round-trip. <a href='/flight-routes/Ontario-ONT/San-Francisco-SFO'>Visit our flight page for the latest deals!>/a>

Question 5

What’s the earliest departure time from Ontario to San Francisco?

Accepted Answer

Early birds can take the earliest flight from Ontario at 6:00 am and will be landing in San Francisco at 7:32 am.

Question 6

What’s the latest departure time from Ontario to San Francisco?

Accepted Answer

If you prefer to fly at night, the latest flight from Ontario to San Francisco jets off at 6:39 pm and lands at 8:10 pm.

Question 7

Which airlines offer Wi-Fi service onboard planes from Ontario to San Francisco?

Accepted Answer

Alaska Airlines, Delta, American Airlines, JetBlue, and Japan Airlines offer inflight Wi-Fi service on the Ontario to San Francisco flight route.

Question 8

Which aircraft models fly most regularly from Ontario to San Francisco?

Accepted Answer

The Boeing 737 MAX 8 is the aircraft model that flies most regularly on the Ontario to San Francisco flight route.

Question 9

On which days can I fly direct from Ontario to San Francisco?

Accepted Answer

There are direct flights from Ontario to San Francisco on a daily basis.

Question 10

What is the cheapest month to fly from Ontario to San Francisco?

Accepted Answer

The cheapest month for flights from Ontario to San Francisco is May, where tickets cost C$ 124 (return) on average. On the other hand, the most expensive months are November and December, where the average cost of round-trip tickets is C$ 285 and C$ 257 respectively.

Question 11

What is the cheapest month to fly from Ontario to San Francisco?

Accepted Answer

The cheapest month for flights from Ontario to San Francisco is May, where tickets cost C$ 124 (return) on average. On the other hand, the most expensive months are November and December, where the average cost of round-trip tickets is C$ 285 and C$ 257 respectively.

Question 12

How does KAYAK find such low prices on flights from Ontario to San Francisco?

Accepted Answer

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to San Francisco. <a href='/flight-routes/Ontario-ONT/San-Francisco-SFO'>Visit our flight page for the latest deals!>/a>

Question 13

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to San Francisco?

Accepted Answer

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from Ontario is likely to change within 7 days, so travelers know whether to wait or book now. <a href='/flight-routes/Ontario-ONT/San-Francisco-SFO'>Visit our flight page for the latest deals!>/a>

Question 14

What is the Hacker Fare option on flights from Ontario to San Francisco?

Accepted Answer

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Francisco with an airline and back to Ontario with another airline. <a href='/flight-routes/Ontario-ONT/San-Francisco-SFO'>Visit our flight page for the latest deals!>/a>

Question 15

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to San Francisco?

Accepted Answer

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Francisco from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. <a href='/flight-routes/Ontario-ONT/San-Francisco-SFO'>Visit our flight page for the latest deals!>/a>

Question 16

Which cabin class options are there for flights between Ontario and San Francisco?

Accepted Answer

There is only one cabin class option available for the route, which is Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Question 17

Which cabin class options are there for flights between Ontario and San Francisco?

Accepted Answer

There is only one cabin class option available for the route, which is Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Question 18

Which airlines provide the cheapest flights from Ontario to San Francisco?

Accepted Answer

In the past 3 days, the cheapest round-trip tickets from Ontario to San Francisco were found on United Airlines (C$ 295) and Delta (C$ 309).

Question 19

Which airlines provide the cheapest flights from Ontario to San Francisco?

Accepted Answer

In the past 3 days, the cheapest round-trip tickets from Ontario to San Francisco were found on United Airlines (C$ 295) and Delta (C$ 309).

Question 20

How far in advance should I book a flight from Ontario to San Francisco?

Accepted Answer

To get a below average price on the flight from Ontario to San Francisco, you should book around 2 weeks before departure, which saves you about 27% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.

Question 21

How far in advance should I book a flight from Ontario to San Francisco?

Accepted Answer

To get a below average price on the flight from Ontario to San Francisco, you should book around 2 weeks before departure, which saves you about 27% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.

Question 22

What are the most popular airlines flying to San Francisco?

Accepted Answer

The most popular airline among KAYAK users flying to San Francisco is Frontier, followed by Delta.

Low season	April
High season	May
Cheapest flight	C$ 102

ONT - SFO

C$ 102 Find Cheap Flights from Ontario to San Francisco

KAYAK searches hundreds of travel sites at once for deals on flights to San Francisco

Everything you should know

Cheap Flights from Ontario to San Francisco (ONT-SFO)

Recent round-trip flight deals from Ontario to San Francisco

Recent one-way flight deals from Ontario to San Francisco

Recent last minute flight deals from Ontario to San Francisco

Recent direct flight deals from Ontario to San Francisco

KAYAK's insights & trends for Ontario to San Francisco flights

Get data-powered insights and trends into flights from Ontario to San Francisco to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Ontario to San Francisco?

The cheapest month for flights from Ontario to San Francisco is May, where tickets cost C$ 124 (return) on average. On the other hand, the most expensive months are November and December, where the average cost of round-trip tickets is C$ 285 and C$ 257 respectively.

How far in advance should I book a flight from Ontario to San Francisco?

To get a below average price on the flight from Ontario to San Francisco, you should book around 2 weeks before departure, which saves you about 27% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.

Which airlines provide the cheapest flights from Ontario to San Francisco?

In the past 3 days, the cheapest round-trip tickets from Ontario to San Francisco were found on United Airlines (C$ 295) and Delta (C$ 309).

Which cabin class options are there for flights between Ontario and San Francisco?

There is only one cabin class option available for the route, which is Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

How many flights are there between Ontario and San Francisco per day?

How long does a flight from Ontario to San Francisco take?

A direct flight to San Francisco will take on average 1h 31m to travel the 941 km flying distance from Ontario.

What’s the earliest departure time from Ontario to San Francisco?

Early birds can take the earliest flight from Ontario at 6:00 am and will be landing in San Francisco at 7:32 am.

What’s the latest departure time from Ontario to San Francisco?

If you prefer to fly at night, the latest flight from Ontario to San Francisco jets off at 6:39 pm and lands at 8:10 pm.

Expert advice for your flight from Ontario to San Francisco

Good to know

When to book flights from Ontario to San Francisco

FAQs for booking flights from Ontario to San Francisco

What is the cheapest flight from Ontario to San Francisco?

In the last 3 days, the lowest price for a flight from Ontario to San Francisco was C$ 102 for a one-way ticket and C$ 232 for a round-trip.

Which airlines offer Wi-Fi service onboard planes from Ontario to San Francisco?

Alaska Airlines, Delta, American Airlines, JetBlue, and Japan Airlines offer inflight Wi-Fi service on the Ontario to San Francisco flight route.

Which aircraft models fly most regularly from Ontario to San Francisco?

The Boeing 737 MAX 8 is the aircraft model that flies most regularly on the Ontario to San Francisco flight route.

On which days can I fly direct from Ontario to San Francisco?

There are direct flights from Ontario to San Francisco on a daily basis.

How does KAYAK find such low prices on flights from Ontario to San Francisco?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to San Francisco.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to San Francisco?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Ontario to San Francisco?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Francisco with an airline and back to Ontario with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to San Francisco?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Francisco from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Ontario to San Francisco

Prefer to fly direct from Ontario to San Francisco?

Everything you need to know for your flight from Ontario to San Francisco

Information on your arrival and departure airports

Cabin class types available on flights from Ontario to San Francisco

Complete your trip to San Francisco with a hotel stay or car rental

Find direct flights to and from Ontario and San Francisco

Flights to other popular destinations

Flights from domestic origins to San Francisco

Choose which airport to fly into in San Francisco

Find deals for your return flight