SAN - ONT

$66 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 3/30. 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 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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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$115
Frontier
Tue 3/10Tue 3/17
SAN - ONT • 1 stop
Cheapest one-way
$66
Frontier
Mon 3/30
SAN - ONT • 1 stop
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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

Tue, Mar 10 - Tue, Mar 17
Frontier Logo
8:25 am - 11:59 pm
SAN
-
ONT
15h 34m
1 stop
Frontier Logo
6:15 am - 9:14 pm
ONT
-
SAN
14h 59m
1 stop
$115Frontier
Tue, Mar 10 - Tue, Mar 17
Frontier Logo
3:16 pm - 9:03 pm
SAN
-
ONT
29h 47m
2 stops
Frontier Logo
6:15 am - 9:14 pm
ONT
-
SAN
14h 59m
1 stop
$141Frontier
Thu, Feb 26 - Mon, Mar 2
Frontier Logo
2:38 pm - 1:26 pm
SAN
-
ONT
22h 48m
1 stop
Frontier Logo
6:43 pm - 9:41 pm
ONT
-
SAN
26h 58m
2 stops
$158Frontier
Wed, Mar 25 - Wed, Apr 1
Frontier Logo
2:08 pm - 7:12 am
SAN
-
ONT
17h 04m
1 stop
Frontier Logo
6:20 am - 12:02 am
ONT
-
SAN
17h 42m
1 stop
$159Frontier
Wed, Mar 25 - Wed, Apr 1
Frontier Logo
2:50 pm - 8:06 am
SAN
-
ONT
41h 16m
2 stops
Frontier Logo
6:20 am - 12:02 am
ONT
-
SAN
17h 42m
1 stop
$162Frontier
Sun, Mar 8 - Sun, Mar 15
Frontier Logo
9:07 pm - 3:37 pm
SAN
-
ONT
18h 30m
1 stop
Frontier Logo
1:55 pm - 4:13 pm
ONT
-
SAN
26h 18m
1 stop
$173Frontier
Mon, Feb 23 - Fri, Feb 27
Frontier Logo
2:05 pm - 1:52 pm
SAN
-
ONT
23h 47m
1 stop
Frontier Logo
9:43 pm - 12:08 am
ONT
-
SAN
26h 25m
2 stops
$179Frontier
Tue, Mar 3 - Tue, Mar 10
American Airlines Logo
6:24 am - 4:22 pm
SAN
-
ONT
9h 58m
1 stop
American Airlines Logo
7:59 pm - 12:03 pm
ONT
-
SAN
16h 04m
1 stop
$183American Airlines
Sun, Mar 8 - Sun, Mar 15
Frontier Logo
9:07 pm - 8:06 am
SAN
-
ONT
10h 59m
1 stop
Frontier Logo
1:55 pm - 9:28 pm
ONT
-
SAN
31h 33m
2 stops
$210Frontier
Mon, Feb 23 - Fri, Feb 27
Frontier Logo
2:05 pm - 1:52 pm
SAN
-
ONT
23h 47m
1 stop
Frontier Logo
2:21 pm - 10:26 am
ONT
-
SAN
20h 05m
1 stop
$228Frontier
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.

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

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from San Diego to Ontario were found on Frontier ($115) and American Airlines ($183).

Find deals

Good to know

Cheapest flight$66
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 $66 for a one-way ticket and $115 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)