$149 Cheap Delta flights New Orleans (MSY) to Ontario (ONT)

View $149 flight on Fri, Oct 31, 2025Opens in a new window

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$149 Cheap Delta flights New Orleans (MSY) to Ontario (ONT)

Prices were available within the past 7 days and start at $149 for one-way flights and $283 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Aug 12 - Wed, Aug 13
MSY
New Orleans
ONT
Ontario
$283 Roundtrip, found 3 days ago
$283
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Aug 12 from New Orleans to Ontario, returning Wed, Aug 13, priced at $283 found 3 days ago
Delta
Tue, Aug 12 - Wed, Aug 13
MSY
New Orleans
ONT
Ontario
$286 Roundtrip, found 3 days ago
$286
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Aug 12 from New Orleans to Ontario, returning Wed, Aug 13, priced at $286 found 3 days ago
Delta
Sat, Sep 13 - Wed, Sep 17
MSY
New Orleans
ONT
Ontario
$296 Roundtrip, found 1 day ago
$296
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Sep 13 from New Orleans to Ontario, returning Wed, Sep 17, priced at $296 found 1 day ago
Flights from New Orleans (MSY) to Ontario (ONT)
Origin airport
Louis Armstrong New Orleans Intl.
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
1620 mi

Frequently asked questions

How much is a Delta Air Lines flight from Louis Armstrong New Orleans Intl. Airport (MSY) to Los Angeles - Ontario Intl. Airport (ONT)?
Landing cheap one-way Delta Air Lines flights from MSY to ONT from $149 on Expedia is easy --- just filter by "Price (lowest to highest)." Alternatively, check out our budget-friendly return fares from $283 for your next adventure.**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 MSY to ONT with Delta Air Lines?
January is one of the least expensive months to get away to Ontario with Delta Air Lines. You could also find excellent prices on one-way and return fares in April.
What is the cheapest time to book flights from Louis Armstrong New Orleans Intl. Airport (MSY) to Los Angeles - Ontario Intl. Airport (ONT) with Delta Air Lines?
Look for affordable Delta Air Lines flights from Louis Armstrong New Orleans Intl. Airport (MSY) to Los Angeles - Ontario Intl. Airport (ONT) one to three months before your departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare type and itinerary, the best day of the week to book a domestic flight is generally Sunday and the most expensive tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**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 Louis Armstrong New Orleans Intl. Airport (MSY) to Los Angeles - Ontario Intl. Airport (ONT)?
To figure out if there's a direct trip from MSY to ONT with Delta Air Lines or other airlines, use our "Nonstop" filter when browsing for tickets.
What is the earliest Delta Air Lines flight from MSY to ONT?
Find Delta Air Lines's earliest flights from MSY to ONT by selecting the "Morning" and "Early Morning" filters. Not only will you get to your destination sooner, early departures are also 20% less likely to be canceled.**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 Louis Armstrong New Orleans Intl. Airport (MSY) to Ontario land at Los Angeles - Ontario Intl. Airport (ONT). This is the main gateway to this city.
Why fly with Delta Air Lines from MSY to ONT?
Offering an excellent in-flight experience and a rewarding loyalty program, Delta Air Lines is a popular option for many travelers flying from MSY to ONT. Also, if you're a Delta SkyMiles and One Key™ member booking with Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which can be used on future getaways.*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 Louis Armstrong New Orleans Intl. Airport (MSY) to Los Angeles - Ontario Intl. Airport (ONT)?
Depending on your fare type, a fee will generally apply if you cancel or change your booking more than 24 hours after it's confirmed. To secure plane tickets with more flexibility, select our "No cancel fee" or "Changes included" filter when searching for flights. For more information on canceling or modifying your reservation, go to "Trips," select your flight and tick "Manage Booking."

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