SAN - ONT

$72 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 9/9. 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

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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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, Sep 10 - Thu, Sep 11
Logo
1:35 pm - 9:56 pmSAN-ONT
8h 21m1 stop
Logo
7:30 pm - 11:34 pmONT-SAN
4h 04m1 stop
$144
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Sat, Sep 20 - Sun, Sep 21
Logo
6:15 am - 12:43 pmSAN-ONT
6h 28m1 stop
Logo
10:28 pm - 7:29 amONT-SAN
9h 01m1 stop
$150
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Sat, Sep 6 - Sun, Sep 7
Frontier Logo
8:00 am - 12:43 pmSAN-ONT
4h 43m1 stop
Frontier Logo
10:13 pm - 3:58 pmONT-SAN
17h 45m1 stop
$153Frontier
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Thu, Sep 11 - Sun, Sep 14
Frontier Logo
6:35 am - 7:54 pmSAN-ONT
13h 19m1 stop
Frontier Logo
10:28 pm - 11:48 amONT-SAN
13h 20m1 stop
$154Frontier
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Tue, Sep 16 - Tue, Sep 23
Frontier Logo
7:15 am - 7:54 pmSAN-ONT
12h 39m1 stop
Frontier Logo
8:00 am - 9:24 pmONT-SAN
13h 24m1 stop
$160Frontier
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Wed, Oct 1 - Wed, Oct 8
Alaska Airlines Logo
7:15 am - 2:12 pmSAN-ONT
6h 57m1 stop
Alaska Airlines Logo
1:31 pm - 8:53 pmONT-SAN
7h 22m1 stop
$342Alaska Airlines
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Fri, Jan 2 - Fri, Jan 16
American Airlines Logo
6:33 am - 5:54 pmSAN-ONT
11h 21m1 stop
American Airlines Logo
5:03 pm - 5:52 pmONT-SAN
24h 49m1 stop
$435American Airlines
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Mon, Nov 24 - Fri, Nov 28
Delta Logo
6:15 am - 11:46 pmSAN-ONT
17h 31m1 stop
Delta Logo
1:00 pm - 10:45 pmONT-SAN
9h 45m1 stop
$585Delta
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Sun, Nov 23 - Fri, Nov 28
Delta Logo
5:00 pm - 12:31 pmSAN-ONT
19h 31m1 stop
Delta Logo
1:00 pm - 10:45 pmONT-SAN
9h 45m1 stop
$635Delta
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Sat, Aug 30 - Sun, Sep 14
American Airlines Logo
12:50 pm - 4:24 pmSAN-ONT
3h 34m1 stop
American Airlines Logo
4:45 pm - 9:52 pmONT-SAN
5h 07m1 stop
$785American Airlines
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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 ($153) and Alaska Airlines ($342).

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Good to know

Cheapest flight$72
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 $72 for a one-way ticket and $144 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.

  • Which airline alliances offer flights from San Diego to Ontario?

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

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