Cheap flights from San Diego to Ontario
Choose between WN, Frontier Airlines, or American Airlines to find the best price
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Cheap one-way trips starting from £38 from San Diego SAN to Ontario ONT
San Diego, CA - Old TownOntario, CA station
One-way,
From £38
San Diego, CA - Old TownOntario, CA station
One-way,
From £38
San Diego, CA - Santa FeMontclair (Ontario)
One-way,
From £37
San Diego, CA Bus StationMontclair (Ontario)
One-way,
From £42
San Diego, CA Bus StationMontclair (Ontario)
One-way,
From £42
San Diego, CA Bus StationMontclair (Ontario)
One-way,
From £44
Cheap round trips starting from £108 from San Diego SAN to Ontario ONT
San Diego, CA - Old TownOntario, CA station
Round trip, -
From £108
San Diego, CA - Old TownOntario, CA station
Round trip, -
From £113
San Diego, CA - Old TownOntario, CA station
Round trip, -
From £116
San Diego, CA - Old TownOntario, CA station
Round trip, -
From £129
San Diego, CA - Old TownOntario, CA station
Round trip, -
From £121
San Diego, CA - Old TownOntario, CA station
Round trip, -
From £111
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
| 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 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.
Explore alternative destinations
Flights from San Diego
- Flights from San Diego to McCarran International
- Flights from San Diego to Denver International
- Flights from San Diego to Phoenix Sky Harbor International
- Flights from San Diego to Dallas/Fort Worth International
- Flights from San Diego to Ronald Reagan Washington National
- Flights from San Diego to Salt Lake City International
- Flights from San Diego to Nashville International
- Flights from San Diego to Pittsburgh International
- Flights from San Diego to Tucson International
- Flights from San Diego to El Paso International
- Flights from San Diego to Sioux Falls Regional
Flights to Ontario
- Flights from McCarran International to Ontario
- Flights from Denver International to Ontario
- Flights from Phoenix Sky Harbor International to Ontario
- Flights from San Francisco International to Ontario
- Flights from Fort Lauderdale–Hollywood International to Ontario
- Flights from Tampa International to Ontario
- Flights from Dallas/Fort Worth International to Ontario
- Flights from San Diego International to Ontario
- Flights from Philadelphia International to Ontario
- Flights from Raleigh–Durham International to Ontario
- Flights from Sacramento International to Ontario
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