HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$385+ Cheap flights from Killeen to Ontario (GRK - ONT)

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 2/28. Fares are subject to change and may not be available on all flights or dates of travel.
GRK — ONT
oct. 17 — oct. 241
ven. 10/17
ven. 10/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Killeen to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Killeen to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Killeen (GRK) to Ontario (ONT). 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 septembre 17, 2025.

Round-trip from

$385
(American Airlines)
From Killeen Fort Hood Regional to Ontario
Search Deals

Find flight deals from Killeen to Ontario

Cheapest flights from Killeen to Ontario
Explore the most affordable flight options available from Killeen to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septembre 17, 2025.

This American Airlines deal was found by Cheapflights users on 9/16. 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.
ven. 9/194:40 pmGRK - ONT
1 stop7h 53mAmerican Airlines
dim. 9/2112:45 pmONT - GRK
1 stop4h 58mAmerican Airlines
Deal found 9/16$503
This American Airlines deal was found by Cheapflights users on 9/17. 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.
sam. 10/410:17 amGRK - ONT
1 stop5h 37mAmerican Airlines
dim. 10/58:15 amONT - GRK
1 stop5h 47mAmerican Airlines
Deal found 9/17$519
This American Airlines deal was found by Cheapflights users on 9/17. 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.
sam. 10/45:16 amGRK - ONT
2 stops8h 40mAmerican Airlines
lun. 10/62:51 pmONT - GRK
1 stop6h 59mAmerican Airlines
Deal found 9/17$524
This American Airlines deal was found by Cheapflights users on 9/16. 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.
jeu. 10/210:08 amGRK - ONT
2 stops10h 04mAmerican Airlines
dim. 10/56:10 amONT - GRK
2 stops7h 52mAmerican Airlines
Deal found 9/16$680

Cheapflights Fare Finder

 
Customize your flight search to find flights from Killeen to Ontario 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 septembre 17, 2025.
Use the filters below to find and compare flights from Killeen to Ontario that are best for you.

Fly from

Killeen

Fly to

Ontario

Route

Depart

Return

Price

KilleenOntario

GRK - ONT

GRKONT

Killeen Fort Hood Regional

sam. 2/28

6:24 am-9:31 am

1 stop5h 07m

Ontario

mer. 3/4

6:47 am-3:49 pm

1 stop7h 02m

$385

KilleenOntario

GRK - ONT

GRKONT

Killeen Fort Hood Regional

jeu. 10/2

10:08 am-1:19 pm

1 stop5h 11m

Ontario

dim. 10/5

6:10 am-4:02 pm

1 stop7h 52m

$503

KilleenOntario

GRK - ONT

GRKONT

Killeen Fort Hood Regional

sam. 10/4

10:17 am-1:54 pm

1 stop5h 37m

Ontario

lun. 10/6

2:51 pm-11:50 pm

1 stop6h 59m

$519

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Best time to book a flight from Killeen to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Killeen 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 Killeen to Ontario

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

Currently, August is the cheapest month in which you can book a flight from Killeen to Ontario (average of $246). Flying from Killeen to Ontario in March is currently the most expensive (average of $327). 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.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated septembre 17, 2025.
Peruse reviews from past customers who have flown with American Airlines from Killeen to Ontario to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
10,000 reviews

Overall

7.2

Boarding

7.5

Crew

8.0

Comfort

7.2

Food

6.4

Entertainment

6.9

Reviews

1 / 20
6.0
Good

sheila,Mar 2025

DFW - MSP

We were delayed for 3 hours with no real reason or offer for compensation
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Overall

7.2

Boarding

7.5

Crew

8.0

Comfort

7.2

Food

6.4

Entertainment

6.9

Reviews

1 / 20
6.0
Good

sheila,Mar 2025

DFW - MSP

We were delayed for 3 hours with no real reason or offer for compensation

Related info for your journey

Find useful and relevant information for your journey from Killeen to Ontario. 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 Killeen to Ontario?

    Airlines like American Airlines fly from Killeen to Ontario in about 5h 07m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 1167 mi.

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

    Flying on American Airlines is currently your cheapest option to Ontario, with prices starting at $160.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Killeen to Ontario 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 Killeen to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Killeen to Ontario (average of $246). Flying from Killeen to Ontario in March is currently the most expensive (average of $327). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Killeen to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Dallas/Fort Worth to Las Vegas flights
Dallas/Fort Worth to Los Angeles flights
Hobby to Las Vegas flights
George Bush Intcntl to Las Vegas flights
Austin to Las Vegas flights
Dallas/Fort Worth to San Francisco flights
Love Field to Las Vegas flights
Dallas/Fort Worth to San Diego flights
Hobby to Los Angeles flights
Dallas/Fort Worth to Santa Ana flights
George Bush Intcntl to Los Angeles flights
Austin to Los Angeles flights
Hobby to San Francisco flights
Dallas/Fort Worth to Ontario flights
Hobby to Ontario flights
Austin to San Francisco flights
George Bush Intcntl to Ontario flights
Dallas/Fort Worth to Burbank flights
George Bush Intcntl to San Francisco flights
San Antonio to Las Vegas flights
Love Field to Los Angeles flights
San Antonio to Los Angeles flights
Hobby to San Diego flights
Dallas/Fort Worth to San Jose flights
Austin to San Diego flights
George Bush Intcntl to San Diego flights
El Paso to Las Vegas flights
Hobby to Santa Ana flights
Austin to Ontario flights
George Bush Intcntl to Santa Ana flights
Dallas/Fort Worth to Sacramento flights
Dallas/Fort Worth to Oakland flights
San Antonio to San Francisco flights
Hobby to Sacramento flights
Hobby to Burbank flights
Love Field to San Francisco flights
Austin to Santa Ana flights
Love Field to Ontario flights
Austin to San Jose flights
San Antonio to Ontario flights
Love Field to San Diego flights
Dallas/Fort Worth to Palm Springs flights
Hobby to San Jose flights
George Bush Intcntl to Burbank flights
George Bush Intcntl to San Jose flights
Dallas/Fort Worth to Reno flights
George Bush Intcntl to Sacramento flights
Love Field to Santa Ana flights
San Antonio to Burbank flights
Hobby to Oakland flights

Top airline flying from Killeen to Ontario

Discover the top airline that operate flights from Killeen to Ontario. 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 septembre 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$160Average$438FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.