Find Cheap Flights from San Diego to Ontario (SAN - LAX)

Flights overview

Useful information for finding cheap flights from San Diego to Ontario and booking your next trip

Cheapest round-trip flights	$303	American 1 stop 10 hr Sat, Jun 6 — Mon, Jun 8	The cheapest round-trip flight from San Diego to Ontario is currently $303
Cheapest one-way flight	$137	American 1 stop 13 hr Wed, Jun 3	The cheapest one-way flight from San Diego to Ontario is currently $137
Last-minute weekend getaway	$683	Southwest 1 stop 4 hr Sat, May 9 — Sun, May 10	The cheapest last-minute weekend getaway from San Diego to Ontario is currently $683
Cheapest business class flights	$658	Alaska 1 stop 7 hr Sat, May 30 — Sun, May 31	The cheapest business class round-trip flight from San Diego to Ontario is currently $658

Fastest flight	3 hr 5 min	The fastest flight with stops from San Diego to Ontario takes 3 hr 5 min
Nonstop flights	None	There are no direct flights on this route.

When is the cheapest time to fly?

The cheapest month to fly from San Diego to Ontario is typically September. The most expensive month to fly is typically March.

September Cheapest	Typical prices: $145–260
March Most expensive	Typical prices: $300–600

Popular airlines from San Diego to Ontario

Southwest

from $353

Typical price: $270–570

1700 weekly connecting flights

SAN - ONT Every day
American

from $303

Typical price: $295–760

187 weekly connecting flights

SAN - ONT Every day
United

from $340

Typical price: $280–590

169 weekly connecting flights

SAN - ONT Every day
Alaska

from $398

Typical price: $370–830

107 weekly connecting flights

SAN - ONT Every day
Frontier

Typical price: $155–280

23 weekly connecting flights

SAN - ONT Every day

Popular airports near San Diego

San Diego International Airport (SAN)

San Diego United States 10 min 2 mi
Tijuana International Airport (TIJ)

Tijuana Mexico 37 min 16 mi
Los Angeles International Airport (LAX)

Los Angeles United States 2 hr 2 min 111 mi
John Wayne Airport (SNA)

Santa Ana United States 1 hr 21 min 78 mi

Popular airports near Ontario

Ontario International Airport (ONT)

Ontario United States 11 min 2 mi
Los Angeles International Airport (LAX)

Los Angeles United States 1 hr 7 min 44 mi
Tijuana International Airport (TIJ)

Tijuana Mexico 2 hr 16 min 112 mi
San Diego International Airport (SAN)

San Diego United States 1 hr 50 min 95 mi

Frequently asked questions about flying from San Diego to Ontario

The cheapest flights from San Diego to Ontario are usually in September. Typical ticket prices in September range from $145 to $260.

The cheapest round-trip flight from San Diego to Ontario recently found on Google Flights was with American from $303. The cheapest one-way flight was with American from $137.

Some of the cheapest round-trip deals we found with different airlines:

The cheapest Southwest flight from San Diego to Ontario is $353, flying from May 30 to Jun 1.
The cheapest American flight from San Diego to Ontario is $303, flying from Jun 6 to Jun 8.
The cheapest United flight from San Diego to Ontario is $340, flying from May 30 to Jun 1.
The cheapest Alaska flight from San Diego to Ontario is $398, flying from May 30 to Jun 1.

The cheapest round-trip flight from San Diego to Ontario starts at $303 from Sat, Jun 6 to Mon, Jun 8. The cheapest one-way flight starts at $137 and departs on Wed, Jun 3.

3 hr 5 min is the shortest flight time from San Diego to Ontario.

Ontario is a year-round destination, with mild to warm weather for much of the year. Summers (Jun–Aug) tend to be hot, while winters (Dec–Feb) are typically mild. There is a slightly higher chance of rain Jan–Apr. The Road to California (Jan) is a quilt show featuring quilting competitions, classes and exhibits. The city celebrates Independence Day (Jul 4) with a parade, picnic and fireworks display. The Route 66 Cruisin' Reunion (Sep) attracts vintage cars from around the country.

It's easy to use Google Flights to find the cheapest days to fly from San Diego to Ontario.
Just click the Departure label near the top of the page to open the calendar. Choose a start date and a return date to see how the round-trip fare changes on those specific days.
Adjust the trip type to see one-way fares. The cheapest available flights are highlighted and easy to spot. Once you settle on dates, click the Search button to see flight options and book the deal.

You can also turn on price tracking to get alerts if the price changes for a route or flight.

What counts as the best airline for your flights from San Diego to Ontario really depends on your individual needs. You may have a favorite carrier or a loyalty program you like, but price, convenience, and airports served also come into play. Flexibility and booking terms – Can you change flights if you want to stay longer or get a refund if you have to postpone your trip? – are also factors that help determine which airline is best to fly from San Diego to Ontario.

In terms of flights, Southwest is the most popular. Southwest offers 1,700 connecting flights per week. Southwest flies from San Diego International Airport (SAN) to Ontario International Airport (ONT) .

Other popular airlines flying from San Diego to Ontario are:

American offers 187 connecting flights per week. American flies from San Diego International Airport (SAN) to Ontario International Airport (ONT) .
United offers 169 connecting flights per week. United flies from San Diego International Airport (SAN) to Ontario International Airport (ONT) .
Alaska offers 107 connecting flights per week. Alaska flies from San Diego International Airport (SAN) to Ontario International Airport (ONT) .
Frontier offers 23 connecting flights per week. Frontier flies from San Diego International Airport (SAN) to Ontario International Airport (ONT) .

The number of connecting flights refers to distinct flights with at least one stop between San Diego and Ontario.

The cheapest round-trip flight from San Diego to Ontario recently found on Google Flights was with American from $303. The cheapest one-way flight was with American from $137.

Some of the cheapest round-trip deals we found with different airlines:

The cheapest Southwest flight from San Diego to Ontario is $353, flying from May 30 to Jun 1.
The cheapest American flight from San Diego to Ontario is $303, flying from Jun 6 to Jun 8.
The cheapest United flight from San Diego to Ontario is $340, flying from May 30 to Jun 1.
The cheapest Alaska flight from San Diego to Ontario is $398, flying from May 30 to Jun 1.

No airline flies direct from San Diego to Ontario.

There are 1700 Southwest connecting flights from San Diego to Ontario per week. Flights are available every day.
There are 187 American connecting flights from San Diego to Ontario per week. Flights are available every day.
There are 169 United connecting flights from San Diego to Ontario per week. Flights are available every day.
There are 107 Alaska connecting flights from San Diego to Ontario per week. Flights are available every day.
There are 23 Frontier connecting flights from San Diego to Ontario per week. Flights are available every day.

Use the Stops filter while searching for flights, to see only nonstop options in your results.

The cheapest last-minute deal between San Diego and Ontario at price $683 is offered by Southwest from Sat, May 9 to Sun, May 10.

No airline flies direct from San Diego to Ontario.

There are 1700 Southwest connecting flights from San Diego to Ontario per week. Flights are available every day.
There are 187 American connecting flights from San Diego to Ontario per week. Flights are available every day.
There are 169 United connecting flights from San Diego to Ontario per week. Flights are available every day.
There are 107 Alaska connecting flights from San Diego to Ontario per week. Flights are available every day.
There are 23 Frontier connecting flights from San Diego to Ontario per week. Flights are available every day.

Use the Stops filter while searching for flights, to see only nonstop options in your results.

There are no direct flights from San Diego to Ontario.

It's easy to find nonstop flights with Google Flights! Once you've searched for flights from San Diego to Ontario, just select the nonstop flights only option in the 'Stops’ filter in the search form and view all available direct flights and their prices.

The cheapest business class round-trip flights between San Diego and Ontario start at $658 from Sat, May 30 to Sun, May 31 with Alaska.

The cheapest economy class round-trip flights between San Diego and Ontario start at $303 from Sat, Jun 6 to Mon, Jun 8.

To book business class trips from San Diego to Ontario, look for the default Economy selection at the top, and change it to your desired cabin class such as Premium Economy, Business Class, or First Class. You can then select your departure and arrival dates, consider available options, and book your business travel.

You can also adjust the trip type to view one-way fares.

The best last-minute getaway deal for the next weekend between San Diego and Ontario starts at $683 from Sat, May 9 to Sun, May 10 with Southwest.

The cheapest last-minute deal between San Diego and Ontario at price $683 is offered by Southwest from Sat, May 9 to Sun, May 10.

To find last-minute flight deals from San Diego to Ontario, start by entering the city names, select the desired departure and return dates, and hit the Search button to view flight options.

You can check for last-minute flights for the same day or adjust the trip type to see one-way fares.