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 $45 for a one-way ticket and $126 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.

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>

$45 CHEAP FLIGHTS from Ontario to San Diego (ONT - SAN)

ONT - SAN

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

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.

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

Round-trip

One-way

Last minute

Recent round-trip flight deals from Ontario to San Diego

Mon, Aug 18 - Tue, Aug 19

6:00 am - 12:08 pmONT-SAN

6h 08m1 stop

8:00 am - 4:18 pmSAN-ONT

8h 18m1 stop

$126Frontier

Find Deal

Sun, Jul 27 - Sun, Aug 3

6:00 am - 12:04 pmONT-SAN

6h 04m1 stop

12:59 pm - 8:52 pmSAN-ONT

7h 53m1 stop

$131Frontier

Find Deal

Wed, Oct 29 - Tue, Nov 4

12:47 pm - 9:20 pmONT-SAN

8h 33m1 stop

8:00 am - 11:47 amSAN-ONT

3h 47m1 stop

$162Frontier

Find Deal

Sun, Sep 14 - Wed, Sep 17

10:23 pm - 11:38 amONT-SAN

13h 15m1 stop

8:00 am - 9:56 pmSAN-ONT

13h 56m1 stop

$163Frontier

Find Deal

Sun, Sep 21 - Wed, Sep 24

7:30 pm - 11:38 amONT-SAN

16h 08m1 stop

8:00 am - 9:56 pmSAN-ONT

13h 56m1 stop

$171Frontier

Find Deal

Thu, Aug 14 - Wed, Aug 20

6:00 am - 12:08 pmONT-SAN

6h 08m1 stop

8:00 am - 4:18 pmSAN-ONT

8h 18m1 stop

$172Frontier

Find Deal

Mon, Aug 25 - Wed, Sep 10

6:00 am - 11:03 pmONT-SAN

17h 03m1 stop

8:00 am - 9:56 pmSAN-ONT

13h 56m1 stop

$173Frontier

Find Deal

Sun, Aug 17 - Tue, Aug 19

12:59 am - 9:52 amONT-SAN

8h 53m1 stop

8:00 am - 4:18 pmSAN-ONT

8h 18m1 stop

$177Frontier

Find Deal

Fri, Sep 19 - Mon, Sep 29

6:00 am - 11:38 amONT-SAN

5h 38m1 stop

11:18 am - 11:38 pmSAN-ONT

12h 20m1 stop

$182Frontier

Find Deal

Tue, Jul 29 - Thu, Jul 31

7:00 am - 6:19 pmONT-SAN

11h 19m1 stop

7:04 pm - 11:53 amSAN-ONT

16h 49m1 stop

$185Frontier

Find Deal

Useful Info

Cheapest flight	$45

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 $45 for a one-way ticket and $126 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

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

Ontario (ONT)

San Diego (SAN)

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.

ONT - SAN

$45 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 (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

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 $45 for a one-way ticket and $126 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