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 $147 for a one-way ticket and $292 for a round-trip. Visit our flight page for the latest deals!>/a>

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

A passport is not required to fly from Ontario to San Diego. Visit our flight page for the latest deals!>/a>

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

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

Which airline alliances offer flights from Ontario to San Diego?

oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between Ontario and San Diego, with oneworld being the most commonly used for this 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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

$147 CHEAP FLIGHTS from Ontario to San Diego (ONT - SAN)

ONT - SAN

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Cheap Flights from Ontario to San Diego

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to San Diego that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Ontario to San Diego

KAYAK's recommended round-trip deals from the most popular airlines that fly from Ontario to San Diego.

Discover the best prices for you by selecting your travel dates on KAYAK.

4:45 pm - 11:59 pmONT-SAN

7h 14m1 stop

1:39 pm - 10:46 pmSAN-ONT

9h 07m1 stop

$292Alaska Airlines

Find Deal

Thu, May 29 - Thu, Jun 5

4:45 pm - 11:59 pmONT-SAN

7h 14m1 stop

3:45 pm - 10:46 pmSAN-ONT

7h 01m1 stop

$302Alaska Airlines

Find Deal

Thu, May 29 - Mon, Jun 2

11:51 am - 10:44 pmONT-SAN

10h 53m1 stop

1:39 pm - 10:46 pmSAN-ONT

9h 07m1 stop

$312Alaska Airlines

Find Deal

Tue, May 27 - Tue, Jun 3

10:00 am - 8:03 pmONT-SAN

10h 03m1 stop

6:11 pm - 11:57 pmSAN-ONT

5h 46m1 stop

$372Alaska Airlines

Find Deal

Sat, May 31 - Sun, Jun 1

10:00 am - 6:26 pmONT-SAN

8h 26m1 stop

6:20 am - 3:49 pmSAN-ONT

9h 29m1 stop

$379American Airlines

Find Deal

Thu, May 22 - Sun, May 25

7:02 pm - 7:29 pmONT-SAN

24h 27m1 stop

7:33 pm - 4:13 pmSAN-ONT

20h 40m1 stop

$397American Airlines

Find Deal

Fri, Jun 20 - Mon, Jun 23

4:45 pm - 11:59 pmONT-SAN

7h 14m1 stop

8:15 am - 6:25 pmSAN-ONT

10h 10m1 stop

$406Hawaiian Airlines

Find Deal

Thu, May 22 - Sun, May 25

4:45 pm - 11:59 pmONT-SAN

7h 14m1 stop

10:28 am - 6:25 pmSAN-ONT

7h 57m1 stop

$411Hawaiian Airlines

Find Deal

Thu, May 22 - Sun, May 25

6:00 am - 3:06 pmONT-SAN

9h 06m1 stop

9:42 am - 5:39 pmSAN-ONT

7h 57m1 stop

$423United Airlines

Find Deal

Thu, May 29 - Mon, Jun 2

6:00 am - 3:06 pmONT-SAN

9h 06m1 stop

9:42 am - 5:39 pmSAN-ONT

7h 57m1 stop

$453United Airlines

Find Deal

Thu, May 29 - Thu, Jun 5

Useful Info

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 Alaska Airlines ($292) and American Airlines ($379).

Find deals

Cheapest flight	$147

Flight from Ontario to San Diego

When to book flights from Ontario to San Diego

Are your dates flexible? Find out the best times to travel from Ontario to San Diego based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

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 $147 for a one-way ticket and $292 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.
Which airline alliances offer flights from Ontario to San Diego?
oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between Ontario and San Diego, with oneworld being the most commonly used for this 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

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on your arrival and departure airports

San Diego (SAN)

Ontario (ONT)

ONT - SAN

$147 Find Cheap Flights from Ontario to San Diego

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

Cheap Flights from Ontario to San Diego

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 Alaska Airlines ($292) and American Airlines ($379).

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 $147 for a one-way ticket and $292 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.

Which airline alliances offer flights from Ontario to San Diego?

oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between Ontario and San Diego, with oneworld being the most commonly used for this 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