$182 Cheap Delta flights Detroit (DTW) to Ontario (ONT)

View $182 flight on Thu, Dec 4, 2025Opens in a new window

$182 Cheap Delta flights Detroit (DTW) to Ontario (ONT)

Prices were available within the past 7 days and start at $182 for one-way flights and $307 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, Jan 10 - Sat, Jan 17
DTW
Detroit
ONT
Ontario
$307 Roundtrip, found 4 hours ago
$307
Roundtrip
found 4 hours ago
Select Delta flight, departing Sat, Jan 10 from Detroit to Ontario, returning Sat, Jan 17, priced at $307 found 4 hours ago
Delta
Sun, Dec 7 - Fri, Dec 12
DTW
Detroit
ONT
Ontario
$347 Roundtrip, found 23 hours ago
$347
Roundtrip
found 23 hours ago
Select Delta flight, departing Sun, Dec 7 from Detroit to Ontario, returning Fri, Dec 12, priced at $347 found 23 hours ago
Flights from Detroit (DTW) to Ontario (ONT)
Origin airport
Detroit Metropolitan Wayne County
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, JetBlue Airways, Southwest Airlines, United
Popular airline
American Airlines
Distance
1929 mi

Frequently asked questions

How much is a Delta Air Lines flight from Detroit Metropolitan Wayne County Airport (DTW) to Los Angeles - Ontario Intl. Airport (ONT)?
Finding cheap one-way Delta Air Lines flights from DTW to ONT from $182 on Expedia is a cinch — just filter by "Price (lowest to highest)." Alternatively, check out our budget-friendly return fares from $307 for your next exciting getaway.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from DTW to ONT with Delta Air Lines?
January is one of the most affordable months to fly to Ontario with Delta Air Lines. You could also find excellent prices on one-way and round-trip tickets in April.
What is the cheapest time to book flights from Detroit Metropolitan Wayne County Airport (DTW) to Los Angeles - Ontario Intl. Airport (ONT) with Delta Air Lines?
To find cheap Delta Air Lines fares from Detroit Metropolitan Wayne County Airport (DTW) to Los Angeles - Ontario Intl. Airport (ONT), start searching one to three months before your planned departure. Reserving domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also influence the overall price. Sunday is usually the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Delta Air Lines fly nonstop from Detroit Metropolitan Wayne County Airport (DTW) to Los Angeles - Ontario Intl. Airport (ONT)?
Fill in your dates, hit search and select "Nonstop" on Expedia to browse any direct flights from DTW to ONT with Delta Air Lines or other carriers.
What is the earliest Delta Air Lines flight from DTW to ONT?
To find the earliest departures from DTW to ONT with Delta Air Lines, filter your search by "Morning" and "Early Morning." Booking an early flight generally means you'll experience fewer cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Delta Air Lines fly into in Ontario?
Delta Air Lines flights from Detroit Metropolitan Wayne County Airport (DTW) to Ontario come in to land at Los Angeles - Ontario Intl. Airport (ONT). This is the main gateway to this destination.
Why fly with Delta Air Lines from DTW to ONT?
Offering a rewarding loyalty program and an excellent in-flight experience, Delta Air Lines is a popular option for many passengers flying from DTW to ONT. Plus, if you're a Delta SkyMiles and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which can be used on future travel.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Delta Air Lines flight from Detroit Metropolitan Wayne County Airport (DTW) to Los Angeles - Ontario Intl. Airport (ONT)?
Depending on your fare type, a fee is typically charged if you cancel or change your flight more than 24 hours after confirmation. To secure plane tickets with more flexibility, select our "Changes included" and "No cancel fee" boxes when you search for flights. To learn more about canceling or modifying your reservation, go to "Trips," select your flight and tick "Manage Booking."

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*Available to One Key members.