Question 1

What is the cheapest flight from Ontario to San Diego?

Accepted Answer

In the last 3 days, the lowest price for a flight from Ontario to San Diego was $87 for a one-way ticket and $125 for a round-trip. <a href='/flight-routes/Ontario-ONT/San-Diego-SAN'>Visit our flight page for the latest deals!>/a>

Question 2

Do I need a passport to fly between Ontario and San Diego?

Accepted Answer

A passport is not required to fly from Ontario to San Diego. <a href='/flight-routes/Ontario-ONT/San-Diego-SAN'>Visit our flight page for the latest deals!>/a>

Question 3

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

Accepted Answer

We unfortunately don’t have that data for this specific route.

Question 4

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

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 Diego. <a href='/flight-routes/Ontario-ONT/San-Diego-SAN'>Visit our flight page for the latest deals!>/a>

Question 5

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

Accepted Answer

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Diego 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-Diego-SAN'>Visit our flight page for the latest deals!>/a>

Question 6

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

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 Diego with an airline and back to Ontario with another airline. Booking your flights between Ontario and SAN can sometimes prove cheaper using this method. <a href='/flight-routes/Ontario-ONT/San-Diego-SAN'>Visit our flight page for the latest deals!>/a>

Question 7

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

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 Diego 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-Diego-SAN'>Visit our flight page for the latest deals!>/a>

Question 8

What is the cheapest layover airport when flying from Ontario to San Diego?

Accepted Answer

Flights via Denver (DEN) offer the most affordable fares, with an average round-trip price of $181.

Question 9

What is the most popular layover airport when flying from Ontario to San Diego?

Accepted Answer

Phoenix (PHX) is the top choice – 20% of KAYAK users who clicked on 1-stop flights from Ontario to San Diego picked an itinerary connecting there.

Question 10

Which layover airport has the quickest connection when flying from Ontario to San Diego?

Accepted Answer

If you prefer a quick connection, Las Vegas (LAS) often has the shortest layovers from Ontario to San Diego, with an average of 0h 45m.

Question 11

Which layover airport offers the shortest total travel time from Ontario to San Diego?

Accepted Answer

Consider flying via Las Vegas (LAS) for the shortest journey. The average one-way travel time for flights connecting there is 3h 00m.

Question 12

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

Accepted Answer

In the past 3 days, the cheapest round-trip tickets from Ontario to San Diego were found on Frontier ($125) and Alaska Airlines ($316).

Question 13

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

Accepted Answer

In the past 3 days, the cheapest round-trip tickets from Ontario to San Diego were found on Frontier ($125) and Alaska Airlines ($316).

Question 14

What are the most popular airlines flying to San Diego?

Accepted Answer

The most popular airline among KAYAK users flying to San Diego is United Airlines, followed by Delta and Alaska Airlines.

ONT - SAN

$87 Find Cheap Flights from Ontario to San Diego

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

Everything you should know

Cheap Flights from Ontario to San Diego (ONT-SAN)

Recent round-trip flight deals from Ontario to San Diego

Recent one-way flight deals from Ontario to San Diego

Recent last minute flight deals from Ontario to San Diego

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

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

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

In the past 3 days, the cheapest round-trip tickets from Ontario to San Diego were found on Frontier ($125) and Alaska Airlines ($316).

What is the most popular layover airport when flying from Ontario to San Diego?

Phoenix (PHX) is the top choice – 20% of KAYAK users who clicked on 1-stop flights from Ontario to San Diego picked an itinerary connecting there.

What is the cheapest layover airport when flying from Ontario to San Diego?

Flights via Denver (DEN) offer the most affordable fares, with an average round-trip price of $181.

Which layover airport offers the shortest total travel time from Ontario to San Diego?

Consider flying via Las Vegas (LAS) for the shortest journey. The average one-way travel time for flights connecting there is 3h 00m.

Which layover airport has the quickest connection when flying from Ontario to San Diego?

If you prefer a quick connection, Las Vegas (LAS) often has the shortest layovers from Ontario to San Diego, with an average of 0h 45m.

Good to know

When to book flights from Ontario to San Diego

FAQs for booking flights from Ontario to San Diego

What is the cheapest flight from Ontario to San Diego?

In the last 3 days, the lowest price for a flight from Ontario to San Diego was $87 for a one-way ticket and $125 for a round-trip.

Do I need a passport to fly between Ontario and San Diego?

A passport is not required to fly from Ontario to San Diego.

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

We unfortunately don’t have that data for this specific route.

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

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 Diego.

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

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Diego 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 Diego?

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 Diego with an airline and back to Ontario with another airline. Booking your flights between Ontario and SAN can sometimes prove cheaper using this method.

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

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 Diego from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

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

Information on your arrival and departure airports

Cabin class types available on flights from Ontario to San Diego

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

Find direct flights to and from Ontario and San Diego

Flights to other popular destinations

Flights from domestic origins to San Diego

Choose which airport to fly into in San Diego

Find deals for your return flight