ONT - GRK

$175 Find Cheap Flights from Ontario to Killeen - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Killeen departing on 8/1. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Killeen

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Killeen, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Killeen, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$347
American Airlines
Tue 8/4Sat 8/8
ONT - GRK • 1 stop
Cheapest one-way
$175
American Airlines
Sat 8/1
ONT - GRK • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Ontario and Killeen. You'll need at least 1 connection.
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Flight Deals

Cheap Flights from Ontario to Killeen (ONT-GRK)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Killeen that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Killeen

Tue, Aug 4 - Sat, Aug 8
American Airlines Logo
2:15 pm - 10:27 pm
ONT
-
GRK
6h 12m
1 stop
American Airlines Logo
3:05 pm - 6:58 pm
GRK
-
ONT
5h 53m
1 stop
$347American Airlines
Fri, Jul 24 - Sun, Aug 2
American Airlines Logo
2:15 pm - 10:27 pm
ONT
-
GRK
6h 12m
1 stop
American Airlines Logo
7:24 pm - 11:59 pm
GRK
-
ONT
6h 35m
1 stop
$387American Airlines
Tue, Aug 4 - Sat, Aug 8
American Airlines Logo
5:34 am - 2:38 pm
ONT
-
GRK
7h 04m
1 stop
American Airlines Logo
9:59 am - 6:15 pm
GRK
-
ONT
10h 16m
2 stops
$452American Airlines
Tue, Aug 4 - Sat, Aug 8
American Airlines Logo
5:34 am - 2:38 pm
ONT
-
GRK
7h 04m
1 stop
American Airlines Logo
9:59 am - 6:15 pm
GRK
-
ONT
10h 16m
2 stops
$459American Airlines
Tue, Aug 4 - Sat, Aug 8
American Airlines Logo
5:34 am - 2:38 pm
ONT
-
GRK
7h 04m
1 stop
American Airlines Logo
5:00 am - 12:03 pm
GRK
-
ONT
9h 03m
2 stops
$486American Airlines
Wed, Jul 8 - Sun, Jul 12
American Airlines Logo
11:59 pm - 9:36 am
ONT
-
GRK
7h 37m
1 stop
American Airlines Logo
7:24 pm - 11:59 pm
GRK
-
ONT
6h 35m
1 stop
$498American Airlines
Tue, Aug 4 - Sat, Aug 8
American Airlines Logo
6:11 am - 6:54 pm
ONT
-
GRK
10h 43m
2 stops
American Airlines Logo
9:59 am - 6:15 pm
GRK
-
ONT
10h 16m
2 stops
$556American Airlines
Tue, Jul 7 - Tue, Jul 14
American Airlines Logo
5:34 am - 12:23 pm
ONT
-
GRK
4h 49m
1 stop
American Airlines Logo
7:24 pm - 10:32 pm
GRK
-
ONT
5h 08m
1 stop
$571American Airlines
Wed, Jul 8 - Sun, Jul 12
American Airlines Logo
1:11 pm - 11:39 pm
ONT
-
GRK
8h 28m
2 stops
American Airlines Logo
7:24 pm - 10:32 pm
GRK
-
ONT
5h 08m
1 stop
$573American Airlines
Tue, Jul 7 - Sat, Jul 11
American Airlines Logo
5:34 am - 12:23 pm
ONT
-
GRK
4h 49m
1 stop
American Airlines Logo
7:53 pm - 11:59 pm
GRK
-
ONT
6h 06m
1 stop
$575American Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Killeen flights

Get data-powered insights and trends into flights from Ontario to Killeen to help you find the cheapest flights, the best time to fly and much more.

How long does a flight from Ontario to Killeen take?

Flying to Killeen from Ontario requires at least one layover, as there are no direct flights for this route. The shortest flight duration is 4h 08m.

Good to know

Cheapest flight$175
Flight from Ontario to Killeen

When to book flights from Ontario to Killeen

Are your dates flexible? Find out the best times to travel from Ontario to Killeen based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Killeen

  • What is the cheapest flight from Ontario to Killeen?

    In the last 5 days, the lowest price for a flight from Ontario to Killeen was $175 for a one-way ticket and $347 for a round-trip.

  • Do I need a passport to fly between Ontario and Killeen?

    No, a passport isn't needed to fly from Ontario to Killeen. However, local authorities might ask for an official ID.

  • Which aircraft models fly most regularly from Ontario to Killeen?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to Killeen?

    oneworld is the only airline alliance operating flights between Ontario and Killeen.

  • How does KAYAK find such low prices on flights from Ontario to Killeen?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Killeen.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Killeen?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Killeen from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Killeen?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Killeen with an airline and back to Ontario with another airline. Booking your flights between Ontario and GRK can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Killeen?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Killeen from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Ontario to Killeen

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Killeen. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Killeen? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.1
American AirlinesOverall score based on 11779 reviews
7.5Boarding
6.8Entertainment
6.4Food
7.9Crew
7.2Comfort
Airline reviews

Flight was delayed multiple times without giving any particular reason and the only thing that was communicated was that 'Aircraft is getting ready'. I was stuck at SFO airport for 15 hours and finally took Southwest Airlines flight back home to Dallas.

2.0 MediocreAnil, Jun 2026
SFO - DFW
Read more American Airlines reviews

Flight was delayed multiple times without giving any particular reason and the only thing that was communicated was that 'Aircraft is getting ready'. I was stuck at SFO airport for 15 hours and finally took Southwest Airlines flight back home to Dallas.

The gate experience at LAX was abysmal (same for the arrival experience two days prior). Despite the LAX -> SAT schedule of two flights daily, our departure gate was at a smaller hub that we had to be bussed to from Terminal 4. Fortunately, I arrived at LAX extra early and had time to spare, but if I had not known, I might have missed my flight. I looked at the LAX airport map in the AA app and there was no indication of the additional boarding process. Lastly the gate area we were bussed to was crowded with limited food and beverage options. On flight, the fight attendant was hospitable and attentive, the flight was smooth, and AA's free (and working) wifi for AA members were all on the positive side.

Ontario airport boarding was very easy to park and access, is clean and TSA took 10 minutes total. Check-in was a breeze and cruise was very nice.

Good flight, seated and had a water within 5 minutes. Crew was hospitable.

Terrible planning. And even worse gate agents. Absolutely rude behavior.

Rough flight No beverage service due to turbulence Bottom Seat cushion was non existent

The flight was on time and arrived early. The crew were friendly and helpful.

The chair cushions may need an upgrade. I have been noticing they are so worn out, thin so you’d sit in a dip 😄. Other than that, all was an enjoyable trip. Thanks AA!

VERY disappointed at the agent checking in my luggage. I know that the weight limit is 23 kg, a little over 50 pounds (50.71 pounds). Yet the agent kept repeating "50 pounds". So I said, the limit is 23 kg, and she had the audacity to say 'no, it is 22 kg!" Imagine my surprise. Was she ignorant or was she poorly trained? Not sure. The boarding process was pretty good. The speakers were loud enough so I still could hear them despite inconsiderate passengers continuing to speak while the announcements were going on. During the flight, the teenage girl sitting behind me kept pressing her feet to the back of my chair. I turned around several times, yet she did not get the hint. I did not make a fuss since I sense I had a bad streak that night with AA, so I just did the best I can to lean forward and not let that bother me.

It was wonderful upgrading to first. Plane was so cold thou. Crew was great. Wish there was a food option in first for such a long flight. Doesnt matter the time of day. Chintzy.

Everything you need to know for your flight from Ontario to Killeen

Information on your arrival and departure airports