Popular flights to Ontario/LA on Southwest Airlines
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flight_land
$
Fare Type Select...
Portland, OR (PDX)to
Ontario/LA (ONT)
Depart: 02/22/2026
From
$84*
Seen: 2 hrs ago
One-way
/
Basic
Seattle/Tacoma (SEA)to
Ontario/LA (ONT)
Depart: 02/24/2026
From
$89*
Seen: 21 hrs ago
One-way
/
Basic
Las Vegas (LAS)to
Ontario/LA (ONT)
Depart: 03/02/2026
From
$89*
Seen: 11 hrs ago
One-way
/
Basic
Phoenix (PHX)to
Ontario/LA (ONT)
Depart: 02/21/2026
From
$96*
Seen: 10 hrs ago
One-way
/
Basic
Denver (DEN)to
Ontario/LA (ONT)
Depart: 02/24/2026
From
$99*
Seen: 13 hrs ago
One-way
/
Basic
Dallas (Love Field) (DAL)to
Ontario/LA (ONT)
Depart: 03/03/2026
From
$100*
Seen: 2 hrs ago
One-way
/
Basic
Oakland (OAK)to
Ontario/LA (ONT)
Depart: 03/03/2026
From
$110*
Seen: 9 hrs ago
One-way
/
Basic
Sacramento (SMF)to
Ontario/LA (ONT)
Depart: 03/03/2026
From
$118*
Seen: 15 hrs ago
One-way
/
Basic
San Francisco (SFO)to
Ontario/LA (ONT)
Depart: 03/03/2026
From
$120*
Seen: 9 hrs ago
One-way
/
Basic
Salt Lake City (SLC)to
Ontario/LA (ONT)
Depart: 02/28/2026
From
$122*
Seen: 21 hrs ago
One-way
/
Basic
St. Louis (STL)to
Ontario/LA (ONT)
Depart: 02/24/2026
From
$139*
Seen: 11 hrs ago
One-way
/
Basic
San Jose, CA (SJC)to
Ontario/LA (ONT)
Depart: 03/02/2026
From
$140*
Seen: 9 hrs ago
One-way
/
Basic
San Antonio (SAT)to
Ontario/LA (ONT)
Depart: 03/03/2026
From
$161*
Seen: 11 hrs ago
One-way
/
Basic
Houston (Hobby) (HOU)to
Ontario/LA (ONT)
Depart: 03/03/2026
From
$167*
Seen: 9 hrs ago
One-way
/
Basic
Kansas City (MCI)to
Ontario/LA (ONT)
Depart: 03/02/2026
From
$172*
Seen: 24 minutes ago
One-way
/
Basic
Baltimore/Washington (BWI)to
Ontario/LA (ONT)
Depart: 02/17/2026
From
$173*
Seen: 4 hrs ago
One-way
/
Basic
Nashville (BNA)to
Ontario/LA (ONT)
Depart: 03/02/2026
From
$185*
Seen: 14 hrs ago
One-way
/
Basic
Atlanta (ATL)to
Ontario/LA (ONT)
Depart: 03/03/2026
From
$205*
Seen: 19 hrs ago
One-way
/
Basic
Austin (AUS)to
Ontario/LA (ONT)
Depart: 02/17/2026
From
$221*
Seen: 4 hrs ago
One-way
/
Basic
Chicago (Midway) (MDW)to
Ontario/LA (ONT)
Depart: 03/03/2026
From
$256*
Seen: 8 hrs ago
One-way
/
Basic
*Fares displayed have been collected within the last 24 hours and may no longer be available at time of booking. Additional fees and charges for optional products and services may apply. Modifying this information may result in a different fare. To find the most updated fare, please visit Southwest.com. Fares listed are Basic, which are subject to additional terms and conditions.
Visit Ontario/LA
Situated roughly at the halfway mark between downtown Los Angeles and San Bernardino against a backdrop of stunning snowcapped peaks, Ontario International Airport offers travelers convenient access to both bustling cities and breathtaking wilderness.
Those looking to take a wintertime trip slope-side will be spoiled for choice. The San Bernardino Mountains that lie just beyond the city of the same name offer attractive options for skiers and snowboarders of all skill levels among the peaks that surround the blue waters of Big Bear Lake. Likewise, the heights of the San Gabriel Mountains located just north of Ontario/LA are ripe for racing down, but those that prefer to take in the valley vistas at a more comfortable pace will find plenty of runs that are to their liking among the area’s resorts.
That’s not to say the region doesn’t also make for a spectacular summertime destination: Those same mountain ranges attract both nature lovers and thrill-seekers. Take a hike beneath old-growth pines or climb and canyoneer among the parks’ craggy natural features. Not looking to be too active? Who could be faulted for taking it easy and enjoying an idle picnic near the natural beauty of Angeles National Forest? Those inclined toward leisure will of course find even more to enjoy here beyond lunchtime, like lazing in shallow pools of the San Gabriel River beneath the almost ever-present California sun.
Once you have had your fill of the great outdoors (if you ever do, that is), take your pick of the region’s cities. Boasting a population of 13 million-plus, the seemingly boundless Los Angeles metro area is jam-packed with action and attractions, from Malibu to Laguna Beach, North Hollywood to South Park, plenty of which can be found within Los Angeles itself. Visitors can see the City of Angels all at once from the heights of Griffith Park, or savor it bit by bit as they take in the cultures and take down the cuisines of Koreatown, Chinatown, and Little Tokyo. All these neighborhoods and more encircle Downtown Los Angeles, home to the Fashion District, epicenter of world style, and The Broad, a contemporary art museum that boasts an eye-catching exterior to match the many works it houses.
Whether it’s exploring the outdoors, sightseeing in the cities, or a bit of both that brings you out to the Los Angeles area, make your way there with ease by catching a flight to Ontario International Airport on Southwest Airlines. Find flights to Ontario/LA with Southwest® and book your SoCal sojourn with ease today. Set off for the Los Angeles area without a hitch and enjoy a simple process from booking all to way to boarding. Find out what else goes into making your trip memorable, and learn more about the Southwest Experience.
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Cities with daily nonstop flights Monday through Friday from ONT:
12‡
Cities with daily nonstop flights Saturday through Sunday from ONT:
23§
† Weekly flights based on DOT published scheduled average flights Monday through Sunday between 10/1/2025 and 10/31/2025. Note: route may not operate every day of the week.
‡ Nonstop flights based on DOT published scheduled average flights Monday through Sunday between 10/1/2025 and 10/31/2025.
Find cheap flights to Ontario/LA
flight_takeoff
flight_land
$
Fare Type Select...
Phoenix (PHX)to
Ontario/LA (ONT)
Depart: 04/11/2026
One-way
/
Basic
From
$40*
Seen: 28 minutes ago
Las Vegas (LAS)to
Ontario/LA (ONT)
Depart: 03/04/2026
One-way
/
Basic
From
$69*
Seen: 23 hrs ago
Boise (BOI)to
Ontario/LA (ONT)
Depart: 02/24/2026
One-way
/
Basic
From
$79*
Seen: 21 hrs ago
Denver (DEN)to
Ontario/LA (ONT)
Depart: 03/04/2026
One-way
/
Basic
From
$79*
Seen: 16 hrs ago
Portland, OR (PDX)to
Ontario/LA (ONT)
Depart: 04/20/2026
One-way
/
Basic
From
$84*
Seen: 9 hrs ago
Seattle/Tacoma (SEA)to
Ontario/LA (ONT)
Depart: 03/04/2026
One-way
/
Basic
From
$89*
Seen: 18 hrs ago
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