$335+ Cheap flights from Killeen to Ontario (GRK - ONT)
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 8/14. Fares are subject to change and may not be available on all flights or dates of travel.
GRK — ONT
Aug 5 — Aug 121
1 adult, Economy
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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 July 31, 2025.
Round-trip from | $439 (American Airlines) |
|---|---|
One-way from | $335 (American Airlines) |
Find flight deals from Killeen to Ontario
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 July 31, 2025.
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 July 31, 2025.
This American Airlines deal was found by Cheapflights users on 7/31. 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.
Tue 8/1210:31 amGRK - ONT
1 stop7h 35mAmerican Airlines
Sun 8/172:31 pmONT - GRK
1 stop6h 51mAmerican Airlines
Deal found 7/31![American Airlines logo]()
$439
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 July 31, 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
Tue 8/12
10:31 am-4:06 pm
1 stop7h 35m
Ontario
Sun 8/17
2:31 pm-11:22 pm
1 stop6h 51m
$439
KilleenOntario
GRK - ONT
GRKONT
Killeen Fort Hood Regional
Thu 8/14
5:16 am-9:59 am
1 stop6h 43m
$335
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 $328). 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 July 31, 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.
Entertainment
6.9
Comfort
7.2
Boarding
7.5
Food
6.5
Overall
7.2
Crew
8.0
Reviews
1 / 20
6.0
Goodsheila,Mar 2025
DFW - MSP
Entertainment
6.9
Comfort
7.2
Boarding
7.5
Food
6.5
Overall
7.2
Crew
8.0
Reviews
1 / 20
6.0
Goodsheila,Mar 2025
DFW - MSP
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
See prices for flight routes from nearby airports that may be better suited for you.
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 July 31, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$160 | Average$492 | FlexibilityNo cancel fee | On-time71% |