Cheap flights from San Diego to Ontario
Choose between WN, Frontier Airlines, or American Airlines to find the best price
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Cheapest one-way trip
$ 42
Cheapest round-trip
$ 85
Average round-trip
$ 108
Most popular airline
WN
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One-way trips
Return trips
Travelers usually depart from San Diego International, San Diego, CA Bus Station, San Diego, CA - Old Town, San Diego, CA - Santa Fe, or San Diego, CA - La Jolla when they travel from San Diego to Ontario. Book your trip to arrive at Ontario International, Montclair (Ontario), Ontario Bus Stop, or Ontario, CA station. The most popular airlines for this route are WN, Frontier Airlines, American Airlines, Alaska Airlines, and United Airlines. San Diego and Ontario have 270 direct flights per week.
Weekly flights
| Mondays | Tuesdays | Wednesdays | Thursdays | Fridays | Saturdays | Sundays | |
|---|---|---|---|---|---|---|---|
| Number of flights | 52 | 47 | 44 | 41 | - | 31 | 55 |
Check-in for a flight from San Diego to Ontario
| Name | Carrier code | IATA Code | Passport needed during booking | Airport check-in closes | Online check-in available |
|---|---|---|---|---|---|
| WN | SWA | WN | No | Unknown | No |
| Frontier Airlines | FFT | F9 | No | Unknown | No |
| American Airlines | AAL | AA | Yes | Unknown | No |
| Alaska Airlines | ASA | AS | Yes | Unknown | No |
| United Airlines | UAL | UA | Yes | Unknown | No |
Frequently asked questions
What are the most popular routes to and from San Diego?
Travelers frequently search for route combinations, such as San Diego and London, Edmonton, Las Vegas, Cincinnati, Manchester, Phoenix, New York, Houston, Denver, San Francisco, Austin, Minneapolis, Los Angeles, New Orleans, Amsterdam, Madrid, Raleigh, Nashville, Detroit, Atlanta.
What are the most popular routes to and from Ontario?
Travelers frequently search for route combinations, such as Ontario and London, New York, Bangkok, San Francisco, Denver, Sacramento, Taipei, Manila, Toronto, Calgary, Seattle, Las Vegas, San Jose, Orlando, Houston, Macau, Los Angeles, Washington, D.C., Manchester, Detroit.
Which airports are there in San Diego?
San Diego is mainly served by San Diego International. But there are other airports nearby, including McClellan–Palomar, Marine Corps Air Station Miramar.
What airports are near San Diego?
The main airport in San Diego is San Diego International. It is also served by Tijuana International, Ontario International, John Wayne, Hollywood Burbank, Mexicali International, Palm Springs International, Long Beach, Imperial County, Yuma International, Cable.
What airports are near Ontario?
The main airport in Ontario is Ontario International. It is also served by San Diego International, Tijuana International, Ontario International, John Wayne, Hollywood Burbank, Palm Springs International, Long Beach, Santa Barbara Municipal, Imperial County, Meadows Field.
What buses and trains depart from San Diego?
A number of bus and train companies depart from San Diego, including Greyhound.
Is it possible to combine flights, buses, and trains in one itinerary when traveling between San Diego and Ontario?
What is Virtual Interlining and how do I use it?
Which airlines fly between San Diego and Ontario?
When's the best time to travel between San Diego and Ontario?
What flights operate between San Diego and Ontario?
How many airports are there near San Diego?
How many airports are there near Ontario?
Is it possible to reach San Diego by bus or train?
What time do nonstop (direct) flights between San Diego and Ontario depart?
What time do nonstop (direct) flights between San Diego and Ontario arrive?
What time do flights between San Diego and Ontario depart?
What time do flights between San Diego and Ontario arrive?
Planning a trip? Thanks to our Virtual Interlining algorithm, we offer billions of route combinations between any A and any B in the world by plane, train, and bus. Find the cheapest routes and best deals for you, as well as the best dates on which to travel.
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