Cheap flights from San Diego to Ontario

Choose between WN, Frontier Airlines, or American Airlines to find the best price

View all connections

Why travel with Kiwi.com?

Customer support

We’ve got you covered if anything goes wrong.

Secure payment

Join millions of travelers booking with us.

Hundreds of carriers

Compare 600+ of carriers in one search to find the best deal.

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-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

MondaysTuesdaysWednesdaysThursdaysFridaysSaturdaysSundays
Number of flights52474441-3155

Check-in for a flight from San Diego to Ontario

NameCarrier codeIATA CodePassport needed during bookingAirport check-in closesOnline check-in available
WNSWAWNNoUnknownNo
Frontier AirlinesFFTF9NoUnknownNo
American AirlinesAALAAYesUnknownNo
Alaska AirlinesASAASYesUnknownNo
United AirlinesUALUAYesUnknownNo

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 McCarran International, Denver International, Phoenix Sky Harbor International, Dallas/Fort Worth International, Ronald Reagan Washington National, Salt Lake City International, Nashville International, Pittsburgh International, Tucson International, El Paso International, Sioux Falls Regional.

What are the most popular routes to and from Ontario?

Travelers frequently search for route combinations, such as Ontario and McCarran International, Denver International, Phoenix Sky Harbor International, San Francisco International, Fort Lauderdale–Hollywood International, Tampa International, Dallas/Fort Worth International, San Diego International, Philadelphia International, Raleigh–Durham International, Sacramento International.

Which airports are there in San Diego?

San Diego is mainly served by San Diego International. But there are other airports nearby, including Marine Corps Air Station Miramar, McClellan–Palomar.

What airports are near San Diego?

The main airport in San Diego is San Diego International. It is also served by Los Angeles International, Tijuana International, Ontario International, John Wayne, Mexicali International, Hollywood Burbank, Palm Springs International, Long Beach, Imperial County, Cable.

What airports are near Ontario?

The main airport in Ontario is Ontario International. It is also served by Los Angeles International, San Diego International, Tijuana International, Ontario International, John Wayne, Hollywood Burbank, Palm Springs International, Long Beach, Imperial County, Santa Barbara Municipal.

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.

Find the best connection from San Diego to Ontario

Search, compare, and book flights, trains, or buses to get there.

Search flights, trains & buses