SAN - ONT

$56 Find Cheap Flights from San Diego to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Diego to Ontario departing on 1/14. 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 Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Diego to Ontario, 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 San Diego to Ontario, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$110
Frontier
Wed 1/14Wed 1/21
SAN - ONT • 1 stop
Cheapest one-way
$56
Frontier
Wed 1/14
SAN - ONT • 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 Ontario!
Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Diego to Ontario 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 San Diego to Ontario

Wed, Jan 14 - Wed, Jan 21
Frontier Logo
12:00 pm - 10:59 pm
SAN
-
ONT
10h 59m1 stop
Frontier Logo
7:15 am - 10:54 am
ONT
-
SAN
27h 39m1 stop
$110Frontier
Sat, Jan 31 - Tue, Feb 3
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10:34 am - 11:24 pm
SAN
-
ONT
12h 50m1 stop
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7:15 am - 11:31 pm
ONT
-
SAN
16h 16m1 stop
$131Frontier
Thu, Jan 29 - Thu, Feb 5
Frontier Logo
2:56 pm - 7:53 pm
SAN
-
ONT
4h 57m1 stop
Frontier Logo
6:20 am - 12:08 am
ONT
-
SAN
17h 48m1 stop
$141Frontier
Sat, Jan 31 - Tue, Feb 3
Frontier Logo
10:34 am - 11:24 pm
SAN
-
ONT
12h 50m1 stop
Frontier Logo
3:07 pm - 11:31 pm
ONT
-
SAN
32h 24m2 stops
$162Frontier
Wed, Jan 14 - Wed, Jan 21
Frontier Logo
7:10 am - 10:59 pm
SAN
-
ONT
15h 49m1 stop
Frontier Logo
7:15 am - 2:01 pm
ONT
-
SAN
30h 46m2 stops
$170Frontier
Mon, Jan 12 - Mon, Jan 19
Frontier Logo
4:47 pm - 10:59 pm
SAN
-
ONT
30h 12m1 stop
Frontier Logo
10:18 pm - 11:31 pm
ONT
-
SAN
25h 13m2 stops
$179Frontier
Mon, Jan 12 - Mon, Jan 19
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4:47 pm - 10:59 pm
SAN
-
ONT
30h 12m1 stop
Frontier Logo
6:10 am - 7:36 pm
ONT
-
SAN
13h 26m1 stop
$188Frontier
Thu, Jan 29 - Thu, Feb 5
Frontier Logo
6:30 am - 12:20 am
SAN
-
ONT
17h 50m1 stop
Frontier Logo
6:20 am - 8:50 pm
ONT
-
SAN
38h 30m2 stops
$199Frontier
Wed, Dec 31 - Tue, Jan 6
Frontier Logo
10:57 am - 9:17 pm
SAN
-
ONT
34h 20m2 stops
Frontier Logo
4:04 pm - 9:58 pm
ONT
-
SAN
5h 54m1 stop
$208Frontier
Wed, Dec 31 - Tue, Jan 6
Frontier Logo
1:06 pm - 9:17 pm
SAN
-
ONT
8h 11m1 stop
Frontier Logo
7:52 am - 9:58 pm
ONT
-
SAN
14h 06m1 stop
$213Frontier
Booking Insights

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

Get data-powered insights and trends into flights from San Diego to Ontario 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 San Diego to Ontario?

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

San Francisco (SFO) is the top choice – 70% of KAYAK users who clicked on 1-stop flights from San Diego to Ontario picked an itinerary connecting there.

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

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

Flights via Portland (PDX) offer the most affordable fares, with an average round-trip price of $472.

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

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

Consider flying via Phoenix (PHX) for the shortest journey. The average one-way travel time for flights connecting there is 4h 29m.

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

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

If you prefer a quick connection, Portland (PDX) often has the shortest layovers from San Diego to Ontario, with an average of 1h 04m.

Find deals

Good to know

Cheapest flight$56
Flight from San Diego to Ontario

When to book flights from San Diego to Ontario

Are your dates flexible? Find out the best times to travel from San Diego to Ontario 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 San Diego to Ontario

  • What is the cheapest flight from San Diego to Ontario?

    In the last 3 days, the lowest price for a flight from San Diego to Ontario was $56 for a one-way ticket and $110 for a round-trip.

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

    No, a passport isn't needed to fly from San Diego to Ontario. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from San Diego to Ontario?

    San Diego and Ontario are both served by 1 main airport. You will leave San Diego from San Diego and will be arriving at Ontario.

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

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

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

    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 San Diego to Ontario.

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

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

    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 Ontario with an airline and back to San Diego with another airline. Booking your flights between San Diego and ONT 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 San Diego to Ontario?

    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 Ontario from San Diego 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 San Diego to Ontario

Information on your arrival and departure airports

San Diego (SAN)
Ontario (ONT)