ONT - SAN

$119 Find Cheap Flights from Ontario to San Diego

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to San Diego departing on 1/30. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to San Diego, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to San Diego, as well as popular online travel agencies
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41 299 237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$143
Frontier
Thu 12/25Thu 1/1
ONT - SAN • 1 stop
Cheapest one-way
$119
Alaska Airlines
Fri 1/30
ONT - SAN • 1 stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Diego!
Flight Deals
Booking Insights
Flight Deals

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.

Recent round-trip flight deals from Ontario to San Diego

Thu, Dec 25 - Thu, Jan 1
Frontier Logo
6:45 am - 11:59 pmONT-SAN
17h 14m1 stop
Frontier Logo
6:25 am - 11:59 pmSAN-ONT
17h 34m1 stop
$143Frontier
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Mon, Feb 2 - Fri, Feb 6
Frontier Logo
6:20 am - 12:08 amONT-SAN
17h 48m1 stop
Frontier Logo
6:30 am - 12:20 amSAN-ONT
17h 50m1 stop
$146Frontier
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Wed, Dec 24 - Wed, Dec 31
Frontier Logo
6:00 am - 12:11 pmONT-SAN
6h 11m1 stop
Frontier Logo
4:47 pm - 11:59 pmSAN-ONT
7h 12m1 stop
$150Frontier
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Mon, Feb 2 - Fri, Feb 6
Frontier Logo
6:20 am - 12:08 amONT-SAN
17h 48m1 stop
Frontier Logo
9:45 pm - 6:40 pmSAN-ONT
20h 55m2 stops
$162Frontier
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Fri, Dec 12 - Tue, Dec 16
Frontier Logo
6:15 am - 12:38 pmONT-SAN
6h 23m1 stop
Frontier Logo
6:25 am - 9:17 pmSAN-ONT
38h 52m2 stops
$178Frontier
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Wed, Dec 24 - Wed, Dec 31
Frontier Logo
6:45 am - 11:59 pmONT-SAN
17h 14m1 stop
Frontier Logo
10:57 am - 11:59 pmSAN-ONT
13h 02m2 stops
$186Frontier
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Thu, Dec 11 - Thu, Dec 11
Frontier Logo
6:15 am - 3:38 pmONT-SAN
9h 23m1 stop
Frontier Logo
8:10 pm - 1:10 pmSAN-ONT
17h 00m2 stops
$206Frontier
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Thu, Dec 25 - Thu, Jan 1
Frontier Logo
9:48 am - 11:59 pmONT-SAN
14h 11m2 stops
Frontier Logo
1:06 pm - 5:22 pmSAN-ONT
4h 16m1 stop
$218Frontier
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Tue, Jan 6 - Thu, Jan 22
Alaska Airlines Logo
4:36 pm - 11:59 pmONT-SAN
7h 23m1 stop
Alaska Airlines Logo
2:20 pm - 11:56 pmSAN-ONT
9h 36m1 stop
$226Alaska Airlines
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Wed, Jan 14 - Wed, Jan 28
Alaska Airlines Logo
11:53 am - 8:58 pmONT-SAN
9h 05m1 stop
Alaska Airlines Logo
4:01 pm - 10:59 amSAN-ONT
18h 58m1 stop
$246Alaska Airlines
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Booking Insights

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.

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

Percentage of 1-stop round-trip flights from Ontario to San Diego chosen by KAYAK users via each layover airport in the last 12 months (only includes trips with the same layover airport on both legs).

Seattle (SEA) is the top choice – 44% 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?

Average round-trip price for 1-stop flights from Ontario to San Diego clicked by KAYAK users in the last 12 months (only includes trips with the same layover airport on both legs).

Flights via San Francisco (SFO) offer the most affordable fares, with an average round-trip price of $488.

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

Shortest average total travel time for 1-stop one-way flights from Ontario to San Diego via different layover airports, based on KAYAK user data from the last 12 months.

Consider flying via Portland (PDX) for the shortest journey. The average one-way travel time for flights connecting there is 5h 59m.

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

Average layover duration at different layover airports for 1-stop one-way flights from Ontario to San Diego, based on KAYAK user data from the last 12 months.

If you prefer a quick connection, Portland (PDX) often has the shortest layovers from Ontario to San Diego, with an average of 1h 02m.

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Good to know

Cheapest flight$119
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.

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 $119 for a one-way ticket and $143 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

Ontario (ONT)
San Diego (SAN)