Southwest® flights from Ontario/LA starting at $63
expand_more
1 Passenger
expand_morePromo Code
expand_moretoday
today
Book flights from Ontario/LA with Southwest Airlines
flight_takeoff
flight_land
$
Ontario/LA (ONT)to
Portland, OR (PDX)Depart: 10/28/2026
From
$63
Seen: 18 hrs ago
One-way
Basic
Ontario/LA (ONT)to
San Francisco (SFO)Depart: 12/05/2026
From
$66
Seen: 19 hrs ago
One-way
Basic
Ontario/LA (ONT)to
Phoenix (PHX)Depart: 11/04/2026
From
$80
Seen: 3 hrs ago
One-way
Basic
Ontario/LA (ONT)to
San Jose, CA (SJC)Depart: 12/25/2026
From
$86
Seen: 18 hrs ago
One-way
Basic
Ontario/LA (ONT)to
Boise (BOI)Depart: 12/05/2026
From
$92
Seen: 16 hrs ago
One-way
Basic
Ontario/LA (ONT)to
Sacramento (SMF)Depart: 11/17/2026
From
$95
Seen: 19 hrs ago
One-way
Basic
Ontario/LA (ONT)to
Oakland (OAK)Depart: 12/15/2026
From
$96
Seen: 15 hrs ago
One-way
Basic
Ontario/LA (ONT)to
Las Vegas (LAS)Depart: 12/15/2026
From
$99
Seen: 17 hrs ago
One-way
Basic
Ontario/LA (ONT)to
Seattle/Tacoma (SEA)Depart: 11/06/2026
From
$104
Seen: 2 hrs ago
One-way
Basic
Ontario/LA (ONT)to
New York LaGuardia (LGA)Depart: 11/18/2026
From
$108
Seen: 9 hrs ago
One-way
Basic
Ontario/LA (ONT)to
Salt Lake City (SLC)Depart: 11/03/2026
From
$114
Seen: 14 hrs ago
One-way
Basic
Ontario/LA (ONT)to
Washington D.C. Reagan National (DCA)Depart: 10/31/2026
From
$116
Seen: 18 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.
Traveling from Ontario/LA
Southwest Airlines is proud to serve Ontario International Airport.
Whether you’d like to see what else the West has to offer or try the Midwest on for size, there’s no need to brave the mid-city traffic when you can catch a convenient Southwest flight closer to home. Even though you’re leaving, everything’s a little easier when you’re closer to home. Find a Southwest flight that works for you out of Ontario International Airport.
Not sure where to head next? Explore the list of places that Southwest flies out of Ontario International Airport and see which locale inflicts you with a bit of a travel bug. Find yourself just the change of scenery that’ll suit your needs, whether that’s a jaunt up to the Pacific Northwest, a trip over to the Rockies, or a visit to the Great Lakes. Trade Tinseltown for any town to which Southwest flies, so long as it’s the town that’s right for you.
Details about LA/Ontario International Airport
Airport code:
ONT
City:
Ontario/LA
State:
California
Concourse:
Terminal 4
Gates:
Gates 403-407
Popular Destinations from Ontario/LA
flight_takeoff
flight_land
$
From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Ontario/LA (ONT) | Portland, OR (PDX) | One-way / Basic | Depart: 10/28/2026 | From $63 Seen: 18 hrs ago | |
| Ontario/LA (ONT) | San Francisco (SFO) | One-way / Basic | Depart: 12/15/2026 | From $66 Seen: 23 hrs ago | |
| Ontario/LA (ONT) | Phoenix (PHX) | One-way / Basic | Depart: 11/12/2026 | From $80 Seen: 2 hrs ago | |
| Ontario/LA (ONT) | San Jose, CA (SJC) | One-way / Basic | Depart: 12/25/2026 | From $86 Seen: 18 hrs ago | |
| Ontario/LA (ONT) | Boise (BOI) | One-way / Basic | Depart: 12/05/2026 | From $92 Seen: 16 hrs ago | |
| Ontario/LA (ONT) | Sacramento (SMF) | One-way / Basic | Depart: 11/17/2026 | From $95 Seen: 19 hrs ago | |
| Ontario/LA (ONT) | Oakland (OAK) | One-way / Basic | Depart: 12/15/2026 | From $96 Seen: 15 hrs ago | |
| Ontario/LA (ONT) | Las Vegas (LAS) | One-way / Basic | Depart: 12/15/2026 | From $99 Seen: 17 hrs ago |
*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.
Plan your trip
-
Rent a car.
Earn Rapid Rewards® points on your next rental car.
Rent a car -
Book a hotel.
Find deals for any season.
Book a hotel -
Plan a vacation.
Getaways by Southwest™ offers tons of vacation packages with amazing travel deals.
Book a vacation package
Join Rapid Rewards, our award-winning frequent flyer program1.
Sign up nowNo blackout dates.
You can use your points to book any seat, on any flight, no exceptions. Any day, any time, any flight, your points are ready to take you to where you want to go.
Your points don’t expire.
You can earn points on flights and on everyday purchases with our partners, which makes getting to your destination easy. No matter when, or where, you earn them, your points won’t expire.
Free inflight WiFi thanks to T-Mobile®.2
Rapid Rewards members can go online to check email, snag a dinner reservation, or browse social media from takeoff to landing. Learn more ›
12022–2023 Freddie Awards. 2Where available. Available only on WiFi-enabled designated aircraft. Free WiFi is only for Rapid Rewards® Members.
Discover popular routes from Ontario/LA
Explore More Flights
Explore Southwest Airlines® popular destinations