$226 Cheap Flights from Killeen (GRK) to Ontario (ONT)

View $226 flight on Tue, Jan 20, 2026Opens in a new window

Popular airlines from Killeen, TX (GRK-Killeen-Fort Hood Regional) to Los Angeles - Ontario Intl. Airport (ONT)

Cheap Flights from Killeen to Ontario (GRK-ONT)

Prices were available within the past 7 days and start at $226 for one-way flights and $385 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, Jan 31 - Sat, Feb 14
GRK
Killeen
ONT
Ontario
$385 Roundtrip, found 10 hours ago
$385
Roundtrip
found 10 hours ago
Select American Airlines flight, departing Sat, Jan 31 from Killeen to Ontario, returning Sat, Feb 14, priced at $385 found 10 hours ago
American Airlines
Mon, Jan 19 - Tue, Feb 3
GRK
Killeen
ONT
Ontario
$418 Roundtrip, found 3 days ago
$418
Roundtrip
found 3 days ago
Select American Airlines flight, departing Mon, Jan 19 from Killeen to Ontario, returning Tue, Feb 3, priced at $418 found 3 days ago
American Airlines
Thu, Jan 15 - Tue, Jan 20
GRK
Killeen
ONT
Ontario
$423 Roundtrip, found 3 days ago
$423
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Jan 15 from Killeen to Ontario, returning Tue, Jan 20, priced at $423 found 3 days ago
American Airlines
Fri, Jan 2 - Wed, Jan 7
GRK
Killeen
ONT
Ontario
$431 Roundtrip, found 3 days ago
$431
Roundtrip
found 3 days ago
Select American Airlines flight, departing Fri, Jan 2 from Killeen to Ontario, returning Wed, Jan 7, priced at $431 found 3 days ago
American Airlines
Fri, Jan 16 - Sat, Jan 17
GRK
Killeen
ONT
Ontario
$436 Roundtrip, found 3 days ago
$436
Roundtrip
found 3 days ago
Select American Airlines flight, departing Fri, Jan 16 from Killeen to Ontario, returning Sat, Jan 17, priced at $436 found 3 days ago
American Airlines
Sat, Feb 28 - Tue, Mar 17
GRK
Killeen
ONT
Ontario
$440 Roundtrip, found 10 hours ago
$440
Roundtrip
found 10 hours ago
Select American Airlines flight, departing Sat, Feb 28 from Killeen to Ontario, returning Tue, Mar 17, priced at $440 found 10 hours ago
American Airlines
Wed, Jan 7 - Thu, Jan 8
GRK
Killeen
ONT
Ontario
$451 Roundtrip, found 3 days ago
$451
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Jan 7 from Killeen to Ontario, returning Thu, Jan 8, priced at $451 found 3 days ago
American Airlines
Thu, Jan 15 - Thu, Jan 22
GRK
Killeen
ONT
Ontario
$456 Roundtrip, found 3 days ago
$456
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Jan 15 from Killeen to Ontario, returning Thu, Jan 22, priced at $456 found 3 days ago
American Airlines
Wed, Jan 7 - Fri, Jan 9
GRK
Killeen
ONT
Ontario
$464 Roundtrip, found 3 days ago
$464
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Jan 7 from Killeen to Ontario, returning Fri, Jan 9, priced at $464 found 3 days ago
American Airlines
Tue, Dec 23 - Tue, Jan 6
GRK
Killeen
ONT
Ontario
$468 Roundtrip, found 2 days ago
$468
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Dec 23 from Killeen to Ontario, returning Tue, Jan 6, priced at $468 found 2 days ago
American Airlines
Thu, Jan 15 - Fri, Jan 23
GRK
Killeen
ONT
Ontario
$469 Roundtrip, found 3 days ago
$469
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Jan 15 from Killeen to Ontario, returning Fri, Jan 23, priced at $469 found 3 days ago

Alternative airports near Ontario

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Los Angeles - Ontario Intl. ONT. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $504
ONT
Los Angeles - Ontario Intl.
CheapestClosest
Average driving time to city center8 min
Flights from $504
Flights from Killeen (GRK) to Ontario (ONT)
Origin airport
Killeen-Fort Hood Regional
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
American Airlines
Roundtrip price
$379
Distance
1167 mi

Killeen to Ontario Flights

The cheapest times to fly from Killeen to Ontario

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Killeen to Ontario are during the month of January. You can find some of the cheapest flights from Killeen to Ontario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Killeen to Ontario

Sunday is one of the best days to book for cheap flights from Killeen to Ontario: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Killeen to Ontario

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Killeen to Ontario in 2026. You can also book with separate airlines for your outbound and return journeys, from $226 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Killeen to Ontario flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Killeen to Ontario airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Killeen-Fort Hood Regional Airport (GRK) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Grab a cheap one-way flight from $226 or cheap return flight from $385 from Killeen-Fort Hood Regional Airport (GRK) to Los Angeles - Ontario Intl. Airport (ONT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Killeen-Fort Hood Regional Airport (GRK) to Los Angeles - Ontario Intl. Airport (ONT)?
The cheapest month to fly from GRK to ONT is January, when there's less demand. Off-peak season is generally when airlines offer lower prices between these airports.
Which airlines fly direct from Killeen-Fort Hood Regional Airport (GRK) to Los Angeles - Ontario Intl. Airport (ONT)?
You can't fly directly from Killeen, TX (GRK-Killeen-Fort Hood Regional) to Los Angeles - Ontario Intl. Airport (ONT). However, you can find other airports that offer nonstop flights. Start your journey at Austin-Bergstrom Intl. Airport (AUS) and head straight to Ontario without any detours.
What is the cheapest airline that flies from Killeen-Fort Hood Regional Airport (GRK) to Los Angeles - Ontario Intl. Airport (ONT)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest GRK to ONT flight.
How many flights per day from Killeen-Fort Hood Regional Airport (GRK) to Los Angeles - Ontario Intl. Airport (ONT)?
There aren't any daily direct flights departing from Killeen-Fort Hood Regional Airport (GRK) to Los Angeles - Ontario Intl. Airport (ONT). But you can book flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be soaring above the clouds in no time.
What day of the week has the most flights from GRK to ONT?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can vary depending on a range of factors, including the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Killeen-Fort Hood Regional Airport (GRK) to Los Angeles - Ontario Intl. Airport (ONT)?
To avoid potential delays on the Killeen-Fort Hood Regional Airport (GRK) to Los Angeles - Ontario Intl. Airport (ONT) route, aim to travel before 3 PM. Departures after this time are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Killeen-Fort Hood Regional Airport (GRK) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Booking your plane ticket from GRK to ONT just before your trip is typically more expensive. However, if there's some wiggle room with your schedule, you could score a cheap last-minute fare.
Is it cheaper to book a GRK to ONT flight and hotel package?
Opting for a GRK to ONT flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Pick from our wide range of stays and then add flights, car rentals and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Killeen-Fort Hood Regional Airport (GRK) to Los Angeles - Ontario Intl. Airport (ONT)?
Typically, it's possible to reschedule or cancel your GRK to ONT flight. However, if it's been more than 24 hours since booking, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.