$238+ 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 11/21. Fares are subject to change and may not be available on all flights or dates of travel.
GRK — ONT
Dec 2 — Dec 91
Round-trip
1 adult, Economy
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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
Cheapest
Best
Last-minute
One-way
Cheapest flights from Killeen to OntarioExplore 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 November 2, 2026.
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 November 2, 2026.
This American Airlines deal was found by Cheapflights users on 10/29. 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 11/123:07 pm -
1 stop8h 25m
Sun 11/152:22 pm -
1 stop7h 22m
Deal found 10/29![American Airlines logo]()
$587
This American Airlines deal was found by Cheapflights users on 10/30. 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 11/137:00 am -
2 stops7h 38m
Mon 11/161:23 pm -
2 stops8h 21m
Deal found 10/30![American Airlines logo]()
$761
Best flights from Killeen to OntarioDiscover carefully curated flight deals from Killeen to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 2, 2026.
Discover carefully curated flight deals from Killeen to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 2, 2026.
This American Airlines deal was found by Cheapflights users on 10/29. 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 11/123:07 pm -
1 stop8h 25m
Sun 11/152:22 pm -
1 stop7h 22m
Deal found 10/29![American Airlines logo]()
$587
This American Airlines deal was found by Cheapflights users on 10/30. 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 11/137:00 am -
1 stop6h 52m
Mon 11/1611:59 pm -
1 stop7h 28m
Deal found 10/30![American Airlines logo]()
$587
Last-minute flights from Killeen to OntarioDiscover last-minute flight deals from Killeen to Ontario. Data last updated November 2, 2026 and is based on user searches.
Discover last-minute flight deals from Killeen to Ontario. Data last updated November 2, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 10/29. 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 11/123:07 pm -
1 stop8h 25m
Sun 11/152:22 pm -
1 stop7h 22m
Deal found 10/29![American Airlines logo]()
$587
This American Airlines deal was found by Cheapflights users on 10/30. 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 11/137:00 am -
2 stops7h 38m
Mon 11/161:23 pm -
2 stops8h 21m
Deal found 10/30![American Airlines logo]()
$761
One-way flights from Killeen to OntarioSearch for one-way flight options from Killeen to Ontario. Find affordable one-way fares based on user searches. Data last updated November 2, 2026.
Search for one-way flight options from Killeen to Ontario. Find affordable one-way fares based on user searches. Data last updated November 2, 2026.
This American Airlines deal was found by Cheapflights users on 10/31. 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 11/216:45 pm -
1 stop7h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![American Airlines logo]()
$238
This American Airlines deal was found by Cheapflights users on 10/30. 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 12/15:00 am -
1 stop6h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![American Airlines logo]()
$269
This American Airlines deal was found by Cheapflights users on 10/31. 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.
Sun 11/226:45 pm -
1 stop5h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![American Airlines logo]()
$294
This American Airlines deal was found by Cheapflights users on 10/29. 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 11/135:00 am -
1 stop6h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![American Airlines logo]()
$301
This American Airlines deal was found by Cheapflights users on 10/31. 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 11/147:00 am -
1 stop6h 52m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![American Airlines logo]()
$344
This American Airlines deal was found by Cheapflights users on 10/31. 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.
Sun 11/155:00 am -
1 stop6h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![American Airlines logo]()
$360
This American Airlines deal was found by Cheapflights users on 10/30. 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.
Mon 11/306:45 pm -
1 stop7h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![American Airlines logo]()
$394
This American Airlines deal was found by Cheapflights users on 10/31. 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 11/187:00 am -
2 stops7h 38m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![American Airlines logo]()
$415
This American Airlines deal was found by Cheapflights users on 10/30. 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.
Sun 11/296:45 pm -
1 stop7h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![American Airlines logo]()
$460
This American Airlines deal was found by Cheapflights users on 10/31. 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 11/1910:00 am -
2 stops7h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![American Airlines logo]()
$495
This American Airlines deal was found by Cheapflights users on 10/30. 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 11/286:45 pm -
1 stop7h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![American Airlines logo]()
$499
Find 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 November 2, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $587 (American Airlines) |
One-way from | $238 (American Airlines) |
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 7,457,451 searches. Data last updated November 2, 2026.
Use the filters below to find and compare flights from Killeen to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
KilleenOntario
GRK Killeen Fort Hood Regional - ONT Ontario
GRKONT
Killeen Fort Hood Regional
Sat 11/21
6:45 pm-11:59 pm
1 stop7h 14m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$238
KilleenOntario
GRK Killeen Fort Hood Regional - ONT Ontario
GRKONT
Killeen Fort Hood Regional
Wed 12/2
5:00 am-9:42 am
1 stop6h 42m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$269
KilleenOntario
GRK Killeen Fort Hood Regional - ONT Ontario
GRKONT
Killeen Fort Hood Regional
Thu 12/3
5:00 am-9:42 am
1 stop6h 42m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$269
KilleenOntario
GRK Killeen Fort Hood Regional - ONT Ontario
GRKONT
Killeen Fort Hood Regional
Sun 11/22
6:45 pm-10:36 pm
1 stop5h 51m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$294
KilleenOntario
GRK Killeen Fort Hood Regional - ONT Ontario
GRKONT
Killeen Fort Hood Regional
Fri 11/27
6:45 pm-10:36 pm
1 stop5h 51m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$294
KilleenOntario
GRK Killeen Fort Hood Regional - ONT Ontario
GRKONT
Killeen Fort Hood Regional
Fri 11/13
5:00 am-9:40 am
1 stop6h 40m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$301
KilleenOntario
GRK Killeen Fort Hood Regional - ONT Ontario
GRKONT
Killeen Fort Hood Regional
Sun 11/15
5:00 am-9:40 am
1 stop6h 40m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$301
Quickest round-trip
KilleenOntario
GRK Killeen Fort Hood Regional - ONT Ontario
GRKONT
Killeen Fort Hood Regional
Tue 11/17
10:00 am-1:32 pm
1 stop5h 32m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$344
KilleenOntario
GRK Killeen Fort Hood Regional - ONT Ontario
GRKONT
Killeen Fort Hood Regional
Sat 11/14
7:00 am-11:52 am
1 stop6h 52m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$344
KilleenOntario
GRK Killeen Fort Hood Regional - ONT Ontario
GRKONT
Killeen Fort Hood Regional
Fri 11/20
5:00 am-9:47 am
1 stop6h 47m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$360
Showing 1-10 of 13 resultsSorted by cheapest first
Compare providers for flights from Killeen to Ontario
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 Killeen to Ontario in November.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Killeen-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Killeen-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Killeen-Ontario flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Killeen-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub 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 Killeen-Ontario 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 Killeen to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Killeen with our price prediction graph.
GRK-ONT
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.
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 November 2, 2026.
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.
Entertainment
6.8
Boarding
7.4
Food
6.4
Overall
7.0
Crew
7.9
Comfort
7.2
Reviews
1 / 20
2.0
MediocreAnonymous,Mar 2026
MIA - SFO
Entertainment
6.8
Boarding
7.4
Food
6.4
Overall
7.0
Crew
7.9
Comfort
7.2
Reviews
1 / 20
2.0
MediocreAnonymous,Mar 2026
MIA - SFO
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.
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Alternative routes for Killeen to Ontario
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Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Killeen to Ontario by cabin class
Find flights from Killeen to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on November 2, 2026.
Killeen and Ontario flights
Browse other Killeen and Ontario flight options. Last updated on November 2, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 7,457,451 searches. Data last updated November 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$425 | Average$570 | FlexibilityNo cancel fee | On-time71% |