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Uncover the best deals on San Diego to Ontario flights by comparing fares from hundreds of airlines and agencies.
Good to Know: Cheapest and Fastest SAN - ONT Flights
Useful information for finding best airline tickets from San Diego International to Ontario International on your next trip.
Cheapest Round Trip Flight
$633
Frontier Airlines
• 1 stop
• 32h 11m
Sep 18 – Sep 25
The cheapest round trip flight from San Diego to Ontario (SAN-ONT-SAN) is currently $633
Fastest Flight
6h 45m
The fastest nonstop flight from San Diego to Ontario (SAN-ONT) takes 6h 45m
Top Airlines Flying from San Diego to Ontario
Latest Flight Deals from San Diego (SAN) to Ontario (ONT)
Compare and book low fare round-trip air tickets from San Diego to Ontario. Ideal for travelers with confirmed return itineraries.
Sep 18 - Sep 25, Economy
San Diego → Ontario
32h 11m
9:03 PM - 4:34 PM • 1 stop
San Diego → Ontario
9h 7m
2:30 PM - 8:17 PM • 1 stop
Frontier Airlines
Sep 18 - Sep 25, Economy
San Diego → Ontario
20h 6m
9:03 PM - 9:09 AM • 1 stop
San Diego → Ontario
20h 17m
8:00 AM - 8:17 PM • 1 stop
Frontier Airlines
Sep 18 - Sep 25, Economy
San Diego → Ontario
15h 8m
10:28 AM - 7:36 PM • 1 stop
San Diego → Ontario
9h 7m
2:30 PM - 8:17 PM • 1 stop
Frontier Airlines
Sep 18 - Sep 25, Economy
San Diego → Ontario
28h 56m
4:54 PM - 10:30 AM • 1 stop
San Diego → Ontario
9h 7m
2:30 PM - 8:17 PM • 1 stop
Frontier Airlines
Sep 18 - Sep 25, Economy
San Diego → Ontario
10h 53m
4:54 PM - 11:47 PM • 1 stop
San Diego → Ontario
9h 7m
2:30 PM - 8:17 PM • 1 stop
Frontier Airlines
Flying to Ontario soon? We've surfaced some of the most affordable last-minute flights from San Diego to Ontario, ideal for urgent plans or spontaneous trips.
Sep 18 - Sep 25, Economy
San Diego → Ontario
32h 11m
9:03 PM - 4:34 PM • 1 stop
San Diego → Ontario
9h 7m
2:30 PM - 8:17 PM • 1 stop
Frontier Airlines
Sep 18 - Sep 25, Economy
San Diego → Ontario
20h 6m
9:03 PM - 9:09 AM • 1 stop
San Diego → Ontario
20h 17m
8:00 AM - 8:17 PM • 1 stop
Frontier Airlines
Sep 18 - Sep 25, Economy
San Diego → Ontario
15h 8m
10:28 AM - 7:36 PM • 1 stop
San Diego → Ontario
9h 7m
2:30 PM - 8:17 PM • 1 stop
Frontier Airlines
Sep 18 - Sep 25, Economy
San Diego → Ontario
28h 56m
4:54 PM - 10:30 AM • 1 stop
San Diego → Ontario
9h 7m
2:30 PM - 8:17 PM • 1 stop
Frontier Airlines
Sep 18 - Sep 25, Economy
San Diego → Ontario
10h 53m
4:54 PM - 11:47 PM • 1 stop
San Diego → Ontario
9h 7m
2:30 PM - 8:17 PM • 1 stop
Frontier Airlines
FAQs on San Diego to Ontario Flights
What are the airports in San Diego?
SAN
What’s the most popular airline flying from SAN to ONT?
The most popular airline flying from San Diego to Ontario are
Can I fly from SAN to ONT non-stop?
NO
Which airlines fly nonstop between San Diego and Ontario?
The non-stop flights between San Diego and Ontario are .
What’s the earliest departure time from SAN to ONT Airport?
The earliest flight leaves SAN at 10:28 am and lands in ONT - Ontario International
What are the airports in Ontario?
ONT
Can I make changes to my San Diego to Ontario 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 SAN to ONT?
Read the fare rules of the San Diego to Ontario 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 San Diego and Ontario?
operate flights between San Diego and Ontario
How long does a flight from San Diego to Ontario take?
It takes approximately 1 hour to fly non-stop from SAN to ONT, which is 94.18 miles by air.
Which airlines provide the cheapest flights from San Diego (SAN) to Ontario (ONT) ?
In the past couple of days, the cheapest tickets to ONT from SAN were found on F9 : USD 785
Do I need a passport to fly between SAN and ONT?
No
What’s the latest departure time from SAN to ONT ?
The last flight leaves SAN at 9:03 pm
San Diego (SAN) to Ontario (ONT): Airport Information
| Origin Airport | San Diego International , San Diego, US |
| Destination Airport | Ontario International , Ontario, US |
| Distance | 94 miles |
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