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Killeen

$285+ Cheap flights from Ontario to Killeen (ONT - GRK)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — GRK
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Ontario to Killeen

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Killeen (GRK). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 15, 2025.

Round-trip from

$309
(American Airlines)

One-way from

$285
(American Airlines)

Popular in

August

Cheapest in

May

Average price

$408
From Ontario to Killeen Fort Hood Regional
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One-way flight from Ontario to Killeen Fort Hood Regional
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Highest demand for flights based on searches. 23% potential increase in price ($166 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Ontario to Killeen

Cheapest flights from Ontario to Killeen
Explore the most affordable flight options available from Ontario to Killeen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This American Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/202:54 pmONT - GRK
1 stop5h 51mAmerican Airlines
Sat 10/44:40 pmGRK - ONT
1 stop7h 53mAmerican Airlines
Deal found 9/13$375
This American Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/236:10 amONT - GRK
2 stops8h 00mAmerican Airlines
Tue 9/305:16 amGRK - ONT
2 stops8h 40mAmerican Airlines
Deal found 9/14$413
This American Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/258:15 amONT - GRK
1 stop5h 47mAmerican Airlines
Sat 10/115:16 amGRK - ONT
1 stop6h 51mAmerican Airlines
Deal found 9/14$439
This American Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/162:51 pmONT - GRK
1 stop6h 59mAmerican Airlines
Wed 10/222:48 pmGRK - ONT
1 stop6h 15mAmerican Airlines
Deal found 9/14$443
This American Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2611:59 pmONT - GRK
1 stop7h 42mAmerican Airlines
Fri 11/288:10 amGRK - ONT
2 stops9h 51mAmerican Airlines
Deal found 9/15$447

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Killeen that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
Use the filters below to find and compare flights from Ontario to Killeen that are best for you.

Fly from

Ontario

Fly to

Killeen

Route

Depart

Return

Price

OntarioKilleen

ONT - GRK

ONTGRK

Ontario

Wed 10/8

2:51 pm-10:52 pm

1 stop6h 01m

Killeen Fort Hood Regional

Sat 10/11

2:48 pm-6:52 pm

1 stop6h 04m

$375

OntarioKilleen

ONT - GRK

ONTGRK

Ontario

Sat 9/20

2:54 pm-10:45 pm

1 stop5h 51m

Killeen Fort Hood Regional

Sat 10/4

4:40 pm-10:33 pm

1 stop7h 53m

$375

OntarioKilleen

ONT - GRK

ONTGRK

Ontario

Tue 9/23

12:47 pm-10:32 pm

1 stop7h 45m

Killeen Fort Hood Regional

Tue 9/30

4:40 pm-10:33 pm

1 stop7h 53m

$375

OntarioKilleen

ONT - GRK

ONTGRK

Ontario

Wed 9/24

6:10 am-4:10 pm

2 stops8h 00m

Killeen Fort Hood Regional

Tue 9/30

5:16 am-11:56 am

2 stops8h 40m

$385

OntarioKilleen

ONT - GRK

ONTGRK

Ontario

Sat 10/25

2:51 pm-10:52 pm

1 stop6h 01m

$285

OntarioKilleen

ONT - GRK

ONTGRK

Ontario

Mon 10/27

6:10 am-2:30 pm

1 stop6h 20m

$285

OntarioKilleen

ONT - GRK

ONTGRK

Ontario

Wed 10/22

10:57 am-5:38 pm

1 stop4h 41m

$285

OntarioKilleen

ONT - GRK

ONTGRK

Ontario

Tue 10/21

12:47 pm-9:33 pm

1 stop6h 46m

$285

OntarioKilleen

ONT - GRK

ONTGRK

Ontario

Fri 10/24

6:10 am-2:18 pm

1 stop6h 08m

$295

OntarioKilleen

ONT - GRK

ONTGRK

Ontario

Sun 10/26

8:15 am-5:43 pm

1 stop7h 28m

$295

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 13 results
1
2

Best time to book a flight from Ontario to Killeen

Have a flexible travel schedule? Discover the best time to fly to Killeen from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Killeen

What is the cheapest month to book a flight from Ontario to Killeen?

Currently, January is the cheapest month in which you can book a flight from Ontario to Killeen (average of $316). Flying from Ontario to Killeen in December is currently the most expensive (average of $468). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to GRK?

Find hourly flight availability from Ontario to Killeen. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

When flying from Ontario to Killeen, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 17% versus a flight in the morning.

Reviews of airlines servicing Killeen

Get insights into the airlines that provide service to Killeen. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Killeen. Reviews last updated September 15, 2025.
Get a feel of what it's like to fly with American Airlines from Ontario to Killeen by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
10,000 reviews

Entertainment

6.9

Overall

7.2

Food

6.4

Crew

8.0

Boarding

7.5

Comfort

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2025

PIT - DFW

Due to gate changes,we nearly missed our flight. The gate agent reassigned our seats and would NOT give us our assigned seats,but she did honor that same request to the man who arrived after us. Her rudeness and difficulty was not appropriate.
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Entertainment

6.9

Overall

7.2

Food

6.4

Crew

8.0

Boarding

7.5

Comfort

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2025

PIT - DFW

Due to gate changes,we nearly missed our flight. The gate agent reassigned our seats and would NOT give us our assigned seats,but she did honor that same request to the man who arrived after us. Her rudeness and difficulty was not appropriate.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Killeen. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Killeen?

    A quick flight from Ontario to Killeen can take about 6h 01m. American Airlines provides one of the quickest options available for as low as $375. There are 1167 mi between Ontario and Killeen.

  • What is the cheapest airline to fly from Ontario to Killeen round-trip?

    According to our current data, American Airlines ($304), offers the cheapest pricing from Ontario to Killeen.

  • Can I find deals for flights from Ontario to Killeen that include hotel bookings?

    Yes. In addition to deals on Ontario to Killeen flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Killeen?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Killeen.

  • Can I find deals for business class flights from Ontario to Killeen?

    Yes. Cheapflights offers flight deals from Ontario to Killeen by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Killeen?

    Currently, January is the cheapest month in which you can book a flight from Ontario to Killeen (average of $316). Flying from Ontario to Killeen in December is currently the most expensive (average of $468). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Killeen?

Book flights to Killeen if you plan to visit one of these locations
Temple
Copperas Cove

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Alternative routes for Ontario to Killeen

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Top airline flying from Ontario to Killeen

Discover the top airline that operate flights from Ontario to Killeen. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$304Average$384FlexibilityNo cancel feeOn-time71%

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