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Killeen

$371+ Cheap flights from Ontario to Killeen (ONT - GRK)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/5. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — GRK
Jan 16 — Jan 231
Fri 1/16
Fri 1/23
1 adult, Economy
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Cheap 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 December 17, 2025.

This American Airlines deal was found by Cheapflights users on 12/16. 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.
Fri 12/2612:45 pmONT - GRK
1 stop7h 44mAmerican Airlines
Wed 12/3110:21 amGRK - ONT
2 stops10h 07mAmerican Airlines
Deal found 12/16$512

Find 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 December 17, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$371
(American Airlines)

Popular in

August

Cheapest in

May

Average price

$687
Provider with most accurate pricing for Ontario-Killeen Fort Hood Regional flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Killeen Fort Hood Regional flights.
Search Deals
From Ontario to Killeen Fort Hood Regional
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($138 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 17, 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

Thu 2/5

3:09 pm-10:43 pm

1 stop5h 34m

Killeen Fort Hood Regional

Mon 2/9

12:31 pm-6:45 pm

1 stop8h 14m

$371

OntarioKilleen

ONT - GRK

ONTGRK

Ontario

Fri 2/27

11:59 pm-9:41 am

1 stop7h 42m

Killeen Fort Hood Regional

Sun 3/1

6:37 pm-11:58 pm

1 stop7h 21m

$408

OntarioKilleen

ONT - GRK

ONTGRK

Ontario

Fri 1/30

3:09 pm-10:43 pm

1 stop5h 34m

Killeen Fort Hood Regional

Sun 2/1

12:31 pm-6:45 pm

1 stop8h 14m

$408

OntarioKilleen

ONT - GRK

ONTGRK

Ontario

Thu 1/1

7:10 am-3:27 pm

1 stop6h 17m

Killeen Fort Hood Regional

Fri 1/2

3:58 pm-10:14 pm

1 stop8h 16m

$543

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Compare providers for flights from Ontario to Killeen

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Killeen in December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Killeen flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Killeen flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Killeen flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Killeen flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Killeen flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, February is the cheapest month in which you can book a flight from Ontario to Killeen (average of $94). Flying from Ontario to Killeen in December is currently the most expensive (average of $202). 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 December 17, 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 evening, which can drop the price by up to 25% versus a flight in the afternoon.

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 December 17, 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
11,049 reviews

Entertainment

6.9

Food

6.5

Crew

8.0

Boarding

7.5

Overall

7.2

Comfort

7.2

Reviews

1 / 20
8.0
Excellent

Monica,Nov 2025

JAC - DFW

At least there was an option of entertainment on this flight.
American Airlines
7.2
Good
11,049 reviews
American Airlines
7.2
Good
11,049 reviews

Entertainment

6.9

Food

6.5

Crew

8.0

Boarding

7.5

Overall

7.2

Comfort

7.2

Reviews

1 / 20
8.0
Excellent

Monica,Nov 2025

JAC - DFW

At least there was an option of entertainment on this flight.

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 5h 34m. American Airlines provides one of the quickest options available for as low as $371. 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, February is the cheapest month in which you can book a flight from Ontario to Killeen (average of $94). Flying from Ontario to Killeen in December is currently the most expensive (average of $202). 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
Copperas Cove
Temple

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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 December 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$304Average$379FlexibilityNo cancel feeOn-time71%

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