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$384+ 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 12/6. Fares are subject to change and may not be available on all flights or dates of travel.
GRK — ONT
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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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 October 30, 2025.

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 12/66:05 amGRK - ONT
1 stop7h 48mAmerican Airlines
Sat 12/133:04 pmONT - GRK
1 stop5h 14mAmerican Airlines
Deal found 10/30$384
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.
Sat 11/84:10 pmGRK - ONT
1 stop8h 19mAmerican Airlines
Tue 11/117:00 amONT - GRK
1 stop6h 40mAmerican Airlines
Deal found 10/29$415
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 10/315:16 amGRK - ONT
1 stop6h 51mAmerican Airlines
Sun 11/210:47 amONT - GRK
1 stop5h 35mAmerican Airlines
Deal found 10/29$444
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.
Sat 12/206:32 pmGRK - ONT
1 stop5h 42mAmerican Airlines
Sat 1/311:59 pmONT - GRK
1 stop7h 52mAmerican Airlines
Deal found 10/29$797

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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$384
(American Airlines)
Provider with most accurate pricing for Killeen Fort Hood Regional-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Killeen Fort Hood Regional-Ontario flights.
Search Deals
From Killeen Fort Hood Regional to Ontario
Search Deals

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 October 30, 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

Sat 12/6

6:05 am-11:53 am

1 stop7h 48m

Ontario

Sat 12/13

3:04 pm-10:18 pm

1 stop5h 14m

$384

KilleenOntario

GRK - ONT

GRKONT

Killeen Fort Hood Regional

Sat 2/28

10:14 am-1:57 pm

1 stop5h 43m

Ontario

Tue 3/3

11:59 pm-9:44 am

1 stop7h 45m

$385

KilleenOntario

GRK - ONT

GRKONT

Killeen Fort Hood Regional

Sat 12/20

6:32 pm-10:14 pm

1 stop5h 42m

Ontario

Sat 1/3

11:59 pm-9:51 am

1 stop7h 52m

$797

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

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 October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*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 Killeen-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Killeen-Ontario flight deals on Cheapflights vs. eDreams >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 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 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.
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, May is the cheapest month in which you can book a flight from Killeen to Ontario (average of $105). Flying from Killeen to Ontario in July is currently the most expensive (average of $162). 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 October 30, 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
11,034 reviews

Overall

7.2

Boarding

7.5

Food

6.4

Crew

8.0

Entertainment

6.9

Comfort

7.2

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
11,034 reviews
American Airlines
7.2
Good
11,034 reviews

Overall

7.2

Boarding

7.5

Food

6.4

Crew

8.0

Entertainment

6.9

Comfort

7.2

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 7h 48m. 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, May is the cheapest month in which you can book a flight from Killeen to Ontario (average of $105). Flying from Killeen to Ontario in July is currently the most expensive (average of $162). 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.

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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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$160Average$438FlexibilityNo cancel feeOn-time71%

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