$149 Cheap Delta flights Raleigh (RDU) to Ontario (ONT)

View $149 flight on Wed, Oct 15, 2025Opens in a new window

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$149 Cheap Delta flights Raleigh (RDU) to Ontario (ONT)

Prices were available within the past 7 days and start at $149 for one-way flights and $238 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, Oct 23 - Mon, Nov 3
RDU
Raleigh
ONT
Ontario
$238 Roundtrip, found 11 hours ago
$238
Roundtrip
found 11 hours ago
Select Delta flight, departing Thu, Oct 23 from Raleigh to Ontario, returning Mon, Nov 3, priced at $238 found 11 hours ago
Delta
Wed, Nov 5 - Tue, Nov 11
RDU
Raleigh
ONT
Ontario
$297 Roundtrip, just found
$297
Roundtrip
just found
Select Delta flight, departing Wed, Nov 5 from Raleigh to Ontario, returning Tue, Nov 11, priced at $297 just found
Flights from Raleigh (RDU) to Ontario (ONT)
Origin airport
Raleigh - Durham 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
2185 mi

Frequently asked questions

How much is a Delta Air Lines flight from Raleigh - Durham Intl. Airport (RDU) to Los Angeles - Ontario Intl. Airport (ONT)?
You can find budget-friendly return Delta Air Lines flights from $238 from RDU to ONT by filtering your results from "Price (lowest to highest)" on Expedia. Or search for deals from $149 for a one-way journey.**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 RDU to ONT with Delta Air Lines?
January is one of the cheapest months to get away to Ontario with Delta Air Lines. You could also find great deals on one-way and return tickets in April.
What is the cheapest time to book flights from Raleigh - Durham Intl. Airport (RDU) to Los Angeles - Ontario Intl. Airport (ONT) with Delta Air Lines?
Begin your search one to three months ahead of your travel date to score cheap fares on Delta Air Lines flights from Raleigh - Durham Intl. Airport (RDU) 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.* Time it well, 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 Raleigh - Durham Intl. Airport (RDU) to Los Angeles - Ontario Intl. Airport (ONT)?
To find out if there's a direct route from RDU to ONT with Delta Air Lines or other carriers, check the "Nonstop" box when searching for flights.
What is the earliest Delta Air Lines flight from RDU to ONT?
Sort your results by "Morning" and "Early Morning" to find the earliest flights from RDU to ONT. Taking off early 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 primary Ontario gateway for Delta Air Lines flights from Raleigh - Durham Intl. Airport (RDU).
Why fly with Delta Air Lines from RDU to ONT?
Traveling from RDU to ONT with Delta Air Lines means enjoying plenty of perks, including a rewarding loyalty program and an excellent in-flight experience. Plus, when you book through Expedia, One Key™ members can collect OneKeyCash™* to use on select future travel purchases. That's in addition to the Delta SkyMiles points you can earn with Delta Air Lines.*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 Raleigh - Durham Intl. Airport (RDU) to Los Angeles - Ontario Intl. Airport (ONT)?
Depending on your ticket type, a fee generally applies if you cancel or change your booking more than 24 hours after it's been confirmed. To secure flexible plane tickets, select our "Changes included" and "No cancel fee" boxes while looking for flights. To learn more about changing or canceling your reservation, go to "Trips," select your flight and tick "Manage Booking."

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*Available to One Key members.