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Uncover the best deals on Ontario to San Diego flights by comparing fares from hundreds of airlines and agencies.
Good to Know: Cheapest and Fastest ONT - SAN Flights
Useful information for finding best airline tickets from Ontario International to San Diego International on your next trip.
Cheapest Round Trip Flight
$378
Southwest Airlines
• 1 stop
• 6h 45m
Oct 10 – Oct 17
The cheapest round trip flight from Ontario to San Diego (ONT-SAN-ONT) is currently $378
Fastest Flight
5h 25m
The fastest nonstop flight from Ontario to San Diego (ONT-SAN) takes 5h 25m
Top Airlines Flying from Ontario to San Diego
Latest Flight Deals from Ontario (ONT) to San Diego (SAN)
Compare and book low fare round-trip air tickets from Ontario to San Diego. Ideal for travelers with confirmed return itineraries.
Oct 10 - Oct 17, Economy
Ontario → San Diego
6h 45m
4:40 PM - 8:45 PM • 1 stop
Ontario → San Diego
5h 35m
6:50 AM - 10:25 AM • 1 stop
Southwest Airlines
Oct 10 - Oct 17, Economy
Ontario → San Diego
6h 40m
3:10 PM - 7:10 PM • 1 stop
Ontario → San Diego
5h 35m
6:50 AM - 10:25 AM • 1 stop
Southwest Airlines
Oct 10 - Oct 17, Economy
Ontario → San Diego
5h 40m
5:30 AM - 9:10 AM • 1 stop
Ontario → San Diego
5h 35m
6:50 AM - 10:25 AM • 1 stop
Southwest Airlines
Oct 10 - Oct 17, Economy
Ontario → San Diego
5h 25m
9:40 AM - 1:05 PM • 1 stop
Ontario → San Diego
5h 35m
6:50 AM - 10:25 AM • 1 stop
Southwest Airlines
Oct 10 - Oct 17, Economy
Ontario → San Diego
7h 10m
9:40 AM - 2:10 PM • 1 stop
Ontario → San Diego
5h 35m
6:50 AM - 10:25 AM • 1 stop
Southwest Airlines
Flying to San Diego soon? We've surfaced some of the most affordable last-minute flights from Ontario to San Diego, ideal for urgent plans or spontaneous trips.
Oct 10 - Oct 17, Economy
Ontario → San Diego
6h 45m
4:40 PM - 8:45 PM • 1 stop
Ontario → San Diego
5h 35m
6:50 AM - 10:25 AM • 1 stop
Southwest Airlines
Oct 10 - Oct 17, Economy
Ontario → San Diego
6h 40m
3:10 PM - 7:10 PM • 1 stop
Ontario → San Diego
5h 35m
6:50 AM - 10:25 AM • 1 stop
Southwest Airlines
Oct 10 - Oct 17, Economy
Ontario → San Diego
5h 40m
5:30 AM - 9:10 AM • 1 stop
Ontario → San Diego
5h 35m
6:50 AM - 10:25 AM • 1 stop
Southwest Airlines
Oct 10 - Oct 17, Economy
Ontario → San Diego
5h 25m
9:40 AM - 1:05 PM • 1 stop
Ontario → San Diego
5h 35m
6:50 AM - 10:25 AM • 1 stop
Southwest Airlines
Oct 10 - Oct 17, Economy
Ontario → San Diego
7h 10m
9:40 AM - 2:10 PM • 1 stop
Ontario → San Diego
5h 35m
6:50 AM - 10:25 AM • 1 stop
Southwest Airlines
FAQs on Ontario to San Diego Flights
What are the airports in Ontario?
ONT
What’s the most popular airline flying from ONT to SAN?
The most popular airline flying from Ontario to San Diego are
Can I fly from ONT to SAN non-stop?
NO
Which airlines fly nonstop between Ontario and San Diego?
The non-stop flights between Ontario and San Diego are .
What’s the earliest departure time from ONT to SAN Airport?
The earliest flight leaves ONT at 5:30 am and lands in SAN - San Diego International
What are the airports in San Diego?
SAN
Can I make changes to my Ontario to San Diego flight tickets or cancel them on FareLeaders.com?
No. We are an airfare comparison site. All the tickets are booked by the travel agent offering the flight deal and any changes or cancellations to be made are directly done directly by them or the airlines.
Can I cancel my flight tickets from ONT to SAN?
Read the fare rules of the Ontario to San Diego air tickets booked. Some airlines allow you to cancel the tickets within a stipulated time period with a cancellation fee.
Which airline alliances offer flights from Ontario and San Diego?
operate flights between Ontario and San Diego
How long does a flight from Ontario to San Diego take?
It takes approximately 1 hour to fly non-stop from ONT to SAN, which is 94.18 miles by air.
Which airlines provide the cheapest flights from Ontario (ONT) to San Diego (SAN) ?
In the past couple of days, the cheapest tickets to SAN from ONT were found on WN : USD 378
Do I need a passport to fly between ONT and SAN?
No
What’s the latest departure time from ONT to SAN ?
The last flight leaves ONT at 4:40 pm
Ontario (ONT) to San Diego (SAN): Airport Information
| Origin Airport | Ontario International , Ontario, US |
| Destination Airport | San Diego International , San Diego, US |
| Distance | 94 miles |
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