Cheap flights from Ontario to San Diego

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

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Return trips

Travelers usually depart from Ontario International, Montclair (Ontario), Ontario Bus Stop, or Ontario, CA station when they travel from Ontario to San Diego. Book your trip to arrive at San Diego International, San Diego, CA Bus Station, San Diego, CA - Old Town, San Diego, CA - Santa Fe, or San Diego, CA - La Jolla. The most popular airlines for this route are WN, American Airlines, Frontier Airlines, United Airlines, and Alaska Airlines. Ontario and San Diego have 221 direct flights per week.

Weekly flights

MondaysTuesdaysWednesdaysThursdaysFridaysSaturdaysSundays
Number of flights43372928-3549

Check-in for a flight from Ontario to San Diego

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

Frequently asked questions

What are the most popular routes to and from Ontario?

Travelers frequently search for route combinations, such as Ontario and Orlando, New York, Denver, London, Austin, Las Vegas, Boston, San Francisco, Stockton, Richmond, Jacksonville, Detroit, Manchester, Indianapolis, Bengaluru, Minneapolis, Boise, Cincinnati, Oklahoma City, Guatemala City.

What are the most popular routes to and from San Diego?

Travelers frequently search for route combinations, such as San Diego and London, Edmonton, Manchester, Las Vegas, Dublin, Reykjavik, Bellingham, New York, San Jose, Paris, San Francisco, Calgary, Raleigh, Tampa, Austin, Naples, Glasgow, Denver, Frankfurt, Taipei.

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, Santa Barbara Municipal, Long Beach, Imperial County, Meadows Field.

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, Mexicali International, Hollywood Burbank, Palm Springs International, Long Beach, Imperial County, Yuma International, Cable.

Is it possible to combine flights, buses, and trains in one itinerary when traveling between Ontario and San Diego?

What is Virtual Interlining and how do I use it?

Which airlines fly between Ontario and San Diego?

When's the best time to travel between Ontario and San Diego?

What flights operate between Ontario and San Diego?

How many airports are there near Ontario?

How many airports are there near San Diego?

What time do nonstop (direct) flights between Ontario and San Diego depart?

What time do nonstop (direct) flights between Ontario and San Diego arrive?

What time do flights between Ontario and San Diego depart?

What time do flights between Ontario and San Diego 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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