Looking for more low-fare flights?
Check out the Low Fare Calendar to find a fare that works for you. Just choose the month you want to depart and return, and we’ll show you the best fares available.
Find low faresSouthwest® flights from Detroit to Ontario/LA from $129
expand_more
1 Passenger
expand_morePromo Code
expand_moretoday
today
Low fares from Detroit to Ontario/LA
$
Detroit (DTW)to
Ontario/LA (ONT)
Depart: 02/24/2026
One-way
Basic
From
$129
Seen: 13 hrs ago
Detroit (DTW)to
Ontario/LA (ONT)
Depart: 03/21/2026
One-way
Basic
From
$129
Seen: 22 hrs ago
Detroit (DTW)to
Ontario/LA (ONT)
Depart: 03/11/2026
One-way
Basic
From
$129
Seen: 7 hrs ago
Detroit (DTW)to
Ontario/LA (ONT)
Depart: 03/21/2026
One-way
Choice
From
$169
Seen: 22 hrs ago
Detroit (DTW)to
Ontario/LA (ONT)
Depart: 02/24/2026
One-way
Choice
From
$169
Seen: 13 hrs ago
Detroit (DTW)to
Ontario/LA (ONT)
Depart: 02/21/2026
One-way
Basic
From
$169
Seen: 1 hour ago
Explore flights from Detroit to Ontario/LA
location_on
location_on
Flight Details
Departing from:
Wayne County Airport
Arriving at:
LA/Ontario International Airport
Distance:
1934 miles
Route Information
78† Weekly flights
† Weekly flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025. Note: route may not operate every day of the week.
‡ Nonstop flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025.
Questions we hear the most
There are 78 weekly flights from Detroit to Ontario/LA on Southwest Airlines.
To find the lowest fares by day and time to fly Detroit to Ontario/LA with Southwest, check out our Low Fare Calendar.
You can rent a car at LA/Ontario International Airport book yours with your flight.
Yes! Flights from Detroit to Ontario/LA—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.
Check the status of your upcoming Southwest flight.
Check out the Southwest Airlines® Help Center for answers about everything Southwest.