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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)

What is the cheapest day to fly round-trip from Ontario to San Diego?

Travelers have found that booking a Thursday departure is the best way to save up to 19% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

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 35 days in advance, which can save you up to 42% on flights from Ontario to San Diego compared to booking the week you need them. Waiting 35 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 $381. For sooner than that we have options available in the next 3 days from $460.

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 August, with the cheapest ticket starting at $138.

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

Unlike in the morning, when flights are generally more expensive, you can save up to 47% on flights from Ontario to San Diego by exploring options for tickets at noon.

Cheap flights from Ontario to San Diego in December, January 2021

The best prices found for ONT to SAN flights for December, January
4 Dec - 6 Dec
$187pp
ONT
Ontario
Frontier
 
1 STOP
SAN
San Diego
SAN
San Diego
Frontier
 
1 STOP
ONT
Ontario
28 Jan - 30 Jan
$237pp
ONT
Ontario
American Airlines
 
1 STOP
SAN
San Diego
SAN
San Diego
American Airlines
 
1 STOP
ONT
Ontario
28 Jan - 30 Jan
$241pp
ONT
Ontario
Alaska Airlines
 
1 STOP
SAN
San Diego
SAN
San Diego
Alaska Airlines
 
1 STOP
ONT
Ontario

Ontario to San Diego 2021 flight deals

Cheap flights to San Diego from Ontario found for this year
4 Dec - 6 Dec
$187pp
ONT
Ontario
Frontier
 
1 STOP
SAN
San Diego
SAN
San Diego
Frontier
 
1 STOP
ONT
Ontario
30 Nov - 7 Dec
$492pp
ONT
Ontario
United Airlines
 
1 STOP
SAN
San Diego
SAN
San Diego
United Airlines
 
1 STOP
ONT
Ontario
30 Nov - 7 Dec
$503pp
ONT
Ontario
United Airlines
 
1 STOP
SAN
San Diego
SAN
San Diego
United Airlines
   
2 STOPS
ONT
Ontario

One-way flights to San Diego from Ontario

The cheapest one-way flights from Ontario to San Diego
2:00 am - 9:00 am
Alaska Airlines
1 Stop
7h 00m
ONT - SAN
Alaska Airlines
9:00 am - 10:16 am
Multiple Airlines
2 Stops
25h 16m
ONT - SAN
Multiple Airlines
10:45 am - 4:50 am
United Airlines
1 Stop
18h 05m
ONT - SAN
United Airlines
$228
United

Related info for your journey

Useful info, stats and facts about Ontario to San Diego 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 $300 on Cheapflights?

Yes, there are multiple flights from Ontario to San Diego for under $300. The cheapest flight booked recently is on American Airlines for just $237, but on average you can expect to pay $274.

Are there nonstop flights from Ontario to San Diego for under $200 on Cheapflights?

There are no nonstop flights from Ontario to San Diego, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.

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 more than the rainfall in San Diego. This will continue over the next 7 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?

United Airlines, Alaska Airlines, and American Airlines can get you from Ontario to San Diego in just under 10h 16m. Your travel time can differ by up to 35h 56m. 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 American Airlines. Our recent data shows that you can find tickets from as low as $237 on this airline. Additional options worth looking into are Alaska Airlines and United Airlines, starting at $241 and $344 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 $137 on United Airlines. Other airlines that offer cheap prices include Alaska Airlines from $170 and Linear Air Taxi from $1,480 one-way.

Alternative routes for Ontario to San Diego

Destination information for San Diego

Things to know before you go. Useful info for your trip from Ontario to San Diego
Average temperature for December in San Diego
68.0 °F
Avg rainfall for December in San Diego
2.4 ″

Airports servicing Ontario

Airports servicing San Diego

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