$139 Cheap Delta flights New York (LGA) to Ontario (ONT)

View $139 flight on Tue, Sep 23, 2025Opens in a new window

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$139 Cheap Delta flights New York (LGA) to Ontario (ONT)

Prices were available within the past 7 days and start at $139 for one-way flights and $267 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, Nov 5 - Mon, Nov 10
LGA
New York
ONT
Ontario
$267 Roundtrip, found 1 day ago
$267
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Nov 5 from New York to Ontario, returning Mon, Nov 10, priced at $267 found 1 day ago
Delta
Wed, Sep 17 - Wed, Sep 24
LGA
New York
ONT
Ontario
$277 Roundtrip, found 5 hours ago
$277
Roundtrip
found 5 hours ago
Select Delta flight, departing Wed, Sep 17 from New York to Ontario, returning Wed, Sep 24, priced at $277 found 5 hours ago
Delta
Fri, Jan 23 - Sun, Jan 25
LGA
New York
ONT
Ontario
$279 Roundtrip, found 2 hours ago
$279
Roundtrip
found 2 hours ago
Select Delta flight, departing Fri, Jan 23 from New York to Ontario, returning Sun, Jan 25, priced at $279 found 2 hours ago
Flights from New York (LGA) to Ontario (ONT)
Origin airport
LaGuardia
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Popular airline
American Airlines
Distance
2417 mi

Frequently asked questions

How much is a Delta Air Lines flight from LaGuardia Airport (LGA) to Los Angeles - Ontario Intl. Airport (ONT)?
Use the "Price (lowest to highest)" filter on Expedia to find cheap Delta Air Lines round-trip flights from $267 from LGA to ONT. Affordable one-way tickets from $139 are available as well.**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 LGA to ONT with Delta Air Lines?
January is one of the least expensive months to travel 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 LaGuardia Airport (LGA) to Los Angeles - Ontario Intl. Airport (ONT) with Delta Air Lines?
To find cheap Delta Air Lines fares from LaGuardia Airport (LGA) to Los Angeles - Ontario Intl. Airport (ONT), start searching one to three months before your intended departure. Securing 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 price you pay. Sunday is generally 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 LaGuardia Airport (LGA) to Los Angeles - Ontario Intl. Airport (ONT)?
Click on the "Nonstop" filter when looking for direct Delta Air Lines flights from LGA to ONT. It's also a good way to compare other airlines servicing the same nonstop route.
What is the earliest Delta Air Lines flight from LGA to ONT?
To find the earliest departures from LGA to ONT with Delta Air Lines, filter your results by "Early Morning" and "Morning." Choosing an early flight usually means cancellations are less likely.**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?
Los Angeles - Ontario Intl. Airport (ONT) is the main Ontario hub for Delta Air Lines flights from LaGuardia Airport (LGA).
Why fly with Delta Air Lines from LGA to ONT?
Offering an excellent in-flight experience and a rewarding loyalty program, Delta Air Lines is the leading choice for many passengers heading from LGA to ONT. Also, 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 you can put toward 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 LaGuardia Airport (LGA) to Los Angeles - Ontario Intl. Airport (ONT)?
It's generally possible to cancel or reschedule your flight, although additional charges may apply if you booked more than 24 hours ago. Want to keep your options open? Apply the "No cancel fee" or "Changes included" filter to find flights that won't charge you extra if you need to revise your plans. To modify your itinerary, go to "Trips," select your flight and click on "Manage Booking" for more information.

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*Available to One Key members.