$119 Cheap Delta flights Houston (IAH) to Ontario (ONT)

View $119 flight on Sun, Nov 9, 2025Opens in a new window

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$119 Cheap Delta flights Houston (IAH) to Ontario (ONT)

Prices were available within the past 7 days and start at $119 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Flights from Houston (IAH) to Ontario (ONT)
Origin airport
George Bush Intercontinental
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, United
Popular airline
United
Distance
1330 mi
Average flight time
1 hour 22 mins

Frequently asked questions

How much is a Delta Air Lines flight from George Bush Intercontinental Airport (IAH) to Los Angeles - Ontario Intl. Airport (ONT)?
Finding cheap one-way Delta Air Lines flights from IAH to ONT from $119 on Expedia is simple — just filter by "Price (lowest to highest)." Alternatively, check out our affordable round-trip fares 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 IAH to ONT with Delta Air Lines?
Delta Air Lines flights to Ontario are usually cheaper in the off-peak months of January and April. Whether you need a return or one-way ticket, you could score a better deal then.
What is the cheapest time to book flights from George Bush Intercontinental Airport (IAH) to Los Angeles - Ontario Intl. Airport (ONT) with Delta Air Lines?
Begin your search one to three months before your departure to get cheap fares on Delta Air Lines flights from George Bush Intercontinental Airport (IAH) to Los Angeles - Ontario Intl. Airport (ONT). You can save 25% by booking your domestic flight 34 to 86 days in advance versus last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Get the timing right, and you can enjoy significant savings on domestic flights.*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 George Bush Intercontinental Airport (IAH) to Los Angeles - Ontario Intl. Airport (ONT)?
Use our "Nonstop" filter when looking for direct Delta Air Lines flights from IAH to ONT. It's also a great way to compare other airlines servicing the same direct route.
What is the earliest Delta Air Lines flight from IAH to ONT?
To find the earliest departures from IAH to ONT with Delta Air Lines, filter your search by "Early Morning" and "Morning." Choosing an early flight usually means you're less likely to experience 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?
Los Angeles - Ontario Intl. Airport (ONT) is the main Ontario gateway for Delta Air Lines flights from George Bush Intercontinental Airport (IAH).
Why fly with Delta Air Lines from IAH to ONT?
Delta Air Lines makes flying from IAH to ONT more comfortable with an excellent in-flight experience and a rewarding loyalty program. You may even earn points with Delta SkyMiles. Make sure you sign up to our free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future bookings.*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 George Bush Intercontinental Airport (IAH) to Los Angeles - Ontario Intl. Airport (ONT)?
Depending on your ticket type, a fee may apply if you modify or cancel your flight more than 24 hours after it's been confirmed. To find flexible fares, select our "Changes included" and "No cancel fee" boxes while looking for flights. For additional information on modifying or canceling your reservation, head to "Trips," select your flight and tick "Manage Booking."

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