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 2022: compare Ontario to San Diego flight prices with the expected peak season, weather and rainfall in San Diego.
What is the cheapest month to fly from Ontario to San Diego?
The best pricing can be found in the month of April. Prices to San Diego from Ontario average $154. You can even find prices in April for less than $154, as users have found deals to San Diego from as low as $75. The month of September appears to be one of the more expensive times to travel to San Diego from Ontario. Flying in the targeted month can save you up to 36%.
What is the cheapest day to fly round-trip from Ontario to San Diego?
Users have found that leaving on a Tuesday can be a cost-effective option. It’s possible to save up to 866% on your flight compared to booking on days when demand is much higher.
How far in advance should I book a flight from Ontario to San Diego?
Find a great deal and save up to 60% by booking at least 43 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Ontario to San Diego within the next two weeks, with the cheapest ticket starting at $173.
When is the cheapest time to fly from Ontario to San Diego (ONT - SAN)?
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to San Diego as you normally would.
Cheap flights from Ontario to San Diego in May, June 2022
The best prices found for ONT to SAN flights for May, June
25 May - 15 Jun
$124pp
ONT
Ontario
Frontier
1 STOP
SAN
San Diego
SAN
San Diego
Frontier
1 STOP
ONT
Ontario
26 Jun - 29 Jun
$130pp
ONT
Ontario
Multiple Airlines
1 STOP
SAN
San Diego
SAN
San Diego
Frontier
1 STOP
ONT
Ontario
28 May - 29 May
$168pp
ONT
Ontario
Multiple Airlines
1 STOP
SAN
San Diego
SAN
San Diego
Frontier
1 STOP
ONT
Ontario
One-way flights to San Diego from Ontario
The cheapest one-way flights from Ontario to San Diego
5:10 am - 10:43 am
Frontier
1 Stop
5h 33m
ONT - SAN
$145
JustFly
6:40 am - 6:21 pm
Alaska Airlines
1 Stop
11h 41m
ONT - SAN
$218
1:24 pm - 3:32 am
Multiple Airlines
2 Stops
14h 08m
ONT - SAN
$255
Kiwi.com
Related info for your journey
Useful info, stats and facts about <span class="emphasized">Ontario</span> to <span class="emphasized">San Diego</span> flights.
COVID Restrictions
View COVID Travel Restrictions for San Diego, CA
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Alternative routes for Ontario to San Diego
See prices for flight routes from nearby airports that may be better suited for you.
Fresno Airterminal to Burbank Bob Hope
from $180 pp
Los Angeles to Bakersfield Meadows Field
from $396 pp
Burbank Bob Hope to Bakersfield Meadows Field
from $840 pp
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 May in San Diego
71.6 °F
Avg rainfall for May in San Diego
0.2 ″