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

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How to find the cheapest flight from
Ontario (ONT) to San Diego (SAN)

All the information you need to plan the best ONT to SAN flight in 2021: compare Ontario to San Diego flight prices with the expected peak season, weather and rainfall in San Diego.
How far in advance should I book a flight from Ontario to San Diego?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 17 days in advance, which can save you up to 27% on flights from Ontario to San Diego compared to booking the week you need them. Waiting 17 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $73. For sooner than that we have options available in the next 3 days from $98.

What is the cheapest month to fly from Ontario to San Diego?

Flights from Ontario to San Diego lean towards being more expensive in December. Prices are generally better when you fly from Ontario to San Diego in July, with the cheapest ticket starting at $44.

When is the cheapest time to fly from Ontario to San Diego (ONT - SAN)?

When flying from Ontario to San Diego, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Cheap flights from Ontario to San Diego in June, July 2021

The best prices found for ONT to SAN flights for June, July
26 Jul - 29 Jul
$185pp
ONT
Ontario
Multiple Airlines
 
1 STOP
SAN
San Diego
SAN
San Diego
Multiple Airlines
 
1 STOP
ONT
Ontario
8 Jul - 11 Jul
$222pp
ONT
Ontario
Multiple Airlines
 
1 STOP
SAN
San Diego
SAN
San Diego
Multiple Airlines
   
2 STOPS
ONT
Ontario
26 Jul - 29 Jul
$231pp
ONT
Ontario
Multiple Airlines
   
2 STOPS
SAN
San Diego
SAN
San Diego
Multiple Airlines
 
1 STOP
ONT
Ontario

Ontario to San Diego 2021 flight deals

Cheap flights to San Diego from Ontario found for this year
26 Jul - 29 Jul
$185pp
ONT
Ontario
Multiple Airlines
 
1 STOP
SAN
San Diego
SAN
San Diego
Multiple Airlines
 
1 STOP
ONT
Ontario
8 Jul - 11 Jul
$222pp
ONT
Ontario
Multiple Airlines
 
1 STOP
SAN
San Diego
SAN
San Diego
Multiple Airlines
   
2 STOPS
ONT
Ontario
26 Jul - 29 Jul
$231pp
ONT
Ontario
Multiple Airlines
   
2 STOPS
SAN
San Diego
SAN
San Diego
Multiple Airlines
 
1 STOP
ONT
Ontario

Non-stop flights to San Diego from Ontario

Save time with Ontario to San Diego direct flight deals
8 Jul - 11 Jul
$1,779pp
ONT
Ontario
Linear Air Taxi
Non-Stop
SAN
San Diego
SAN
San Diego
Linear Air Taxi
Non-Stop
ONT
Ontario
19 Jul - 20 Jul
$2,001pp
ONT
Ontario
Linear Air Taxi
Non-Stop
SAN
San Diego
SAN
San Diego
Linear Air Taxi
Non-Stop
ONT
Ontario
21 Jun - 23 Jun
$3,549pp
ONT
Ontario
Linear Air Taxi
Non-Stop
SAN
San Diego
SAN
San Diego
Linear Air Taxi
Non-Stop
ONT
Ontario

Last minute flights from Ontario to San Diego

Late deals on round-trip flights to San Diego from Ontario, departing today and this week
21 Jun - 23 Jun
$298pp
ONT
Ontario
Multiple Airlines
 
1 STOP
SAN
San Diego
SAN
San Diego
Multiple Airlines
 
1 STOP
ONT
Ontario
21 Jun - 23 Jun
$314pp
ONT
Ontario
Frontier
 
1 STOP
SAN
San Diego
SAN
San Diego
Frontier
   
2 STOPS
ONT
Ontario
21 Jun - 23 Jun
$345pp
ONT
Ontario
Multiple Airlines
   
2 STOPS
SAN
San Diego
SAN
San Diego
Frontier
   
2 STOPS
ONT
Ontario

One-way flights to San Diego from Ontario

The cheapest one-way flights from Ontario to San Diego
3:00 am - 1:36 pm
Multiple Airlines
2 Stops
34h 36m
ONT - SAN
Multiple Airlines
$183
Gotogate
2:00 am - 10:19 am
Delta
1 Stop
8h 19m
ONT - SAN
Delta
$202
Delta
9:40 am - 5:14 am
United Airlines
1 Stop
19h 34m
ONT - SAN
United Airlines
$236
United

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Ontario</span> to <span class="emphasized">San Diego</span> flights.

Flight FAQs

From Ontario to San Diego

Are flight prices decreasing from Ontario to San Diego due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Ontario and San Diego for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

Which airlines flying from Ontario to San Diego have flexible cancellations due to COVID-19?

Due to the rapidly changing circumstances due to COVID-19, airlines like American Airlines, Linear Air Taxi, and United Airlines flying from Ontario to San Diego have implemented new flexible cancellation policies.

Can I find flights from Ontario to San Diego for under $200 on Cheapflights?

Yes, there are multiple flights from Ontario to San Diego for under $200. The cheapest flight booked recently is on Multiple Airlines for just $185, but on average you can expect to pay $293.

Are there nonstop flights from Ontario to San Diego for under $1,800 on Cheapflights?

Cheapflights has at least 3 direct flights from Ontario to San Diego under $1,800. A good price for a nonstop flight from Ontario to San Diego is less than $2,443.

Are there last-minute flights available from Ontario to San Diego for under $300?

There are currently 19+ open flights from Ontario to San Diego within the next 7 days for less than $300.

How popular is this flight route?

This flight path from Ontario to San Diego was viewed by 58 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

Does it rain more in Ontario or San Diego?

The rainfall in Ontario is generally same as the rainfall in San Diego. This will continue over the next 2 days.

Is Ontario weather warmer or cooler than San Diego?

Expect the weather to be around 95 °F on average in July. As the temperature peaks, try to get your plans done early, as flight price and availability will have an impact on your travels. The climate in San Diego is generally colder than in Ontario.

How long is the flight from Ontario to San Diego?

Alaska Airlines, Delta, and American Airlines can get you from Ontario to San Diego in just under 6h 10m. Your travel time can differ by up to 59m. This flight may include one or multiple stops.

What are the cheapest airlines flying from Ontario to San Diego round-trip?

Our cheapest airline available from Ontario to San Diego is Delta. Our recent data shows that you can find tickets from as low as $243 on this airline. Additional options worth looking into are Alaska Airlines and American Airlines, starting at $293 and $366 round-trip.

What are the cheapest airlines to fly from Ontario to San Diego one-way?

One-way options have recently been found by users for as low as $117 on Alaska Airlines. Other airlines that offer cheap prices include United Airlines from $152 and Delta from $202 one-way.

Alternative routes for Ontario to San Diego

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for San Diego

Things to know before you go - useful duration and weather info for your trip from Ontario to San Diego.
Average temperature for June in San Diego
75.2 °F
Avg rainfall for June in San Diego
0.1 ″

Airports servicing Ontario

Airports servicing San Diego

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