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Killeen

$224+ Cheap flights from Illinois to Killeen (GRK)

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 1/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — GRK
Jan 16 — Jan 231
Fri 1/16
Fri 1/23
1 adult, Economy
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Cheap flight deals from Illinois to Killeen

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

This American Airlines deal was found by Cheapflights users on 12/17. 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.
Wed 12/2411:41 amSTL - GRK
1 stop4h 15mAmerican Airlines
Wed 12/3111:57 amGRK - STL
1 stop5h 10mAmerican Airlines
Deal found 12/17$394
This American Airlines deal was found by Cheapflights users on 12/15. 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 12/239:00 amORD - GRK
1 stop6h 29mAmerican Airlines
Sat 1/36:32 pmGRK - ORD
1 stop4h 43mAmerican Airlines
Deal found 12/15$501
This American Airlines deal was found by Cheapflights users on 12/15. 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 12/201:16 pmORD - GRK
1 stop7h 17mAmerican Airlines
Sun 12/286:00 amGRK - ORD
1 stop5h 44mAmerican Airlines
Deal found 12/15$514
This American Airlines deal was found by Cheapflights users on 12/15. 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 12/201:16 pmORD - GRK
1 stop7h 17mAmerican Airlines
Tue 12/303:58 pmGRK - ORD
1 stop5h 21mAmerican Airlines
Deal found 12/15$534
This American Airlines deal was found by Cheapflights users on 12/15. 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 12/181:15 pmORD - GRK
1 stop4h 41mAmerican Airlines
Tue 12/306:32 pmGRK - ORD
1 stop4h 43mAmerican Airlines
Deal found 12/15$542
This American Airlines deal was found by Cheapflights users on 12/15. 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 12/201:16 pmORD - GRK
1 stop7h 17mAmerican Airlines
Sat 12/276:32 pmGRK - ORD
1 stop4h 43mAmerican Airlines
Deal found 12/15$552
This American Airlines deal was found by Cheapflights users on 12/15. 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 12/201:16 pmORD - GRK
1 stop7h 17mAmerican Airlines
Mon 12/296:32 pmGRK - ORD
1 stop4h 43mAmerican Airlines
Deal found 12/15$560
This American Airlines deal was found by Cheapflights users on 12/15. 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 12/192:50 pmORD - GRK
1 stop5h 43mAmerican Airlines
Sat 12/276:32 pmGRK - ORD
1 stop4h 43mAmerican Airlines
Deal found 12/15$561
This American Airlines deal was found by Cheapflights users on 12/15. 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 12/188:56 amORD - GRK
1 stop6h 33mAmerican Airlines
Fri 12/2611:57 amGRK - ORD
1 stop5h 29mAmerican Airlines
Deal found 12/15$568
This American Airlines deal was found by Cheapflights users on 12/15. 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 12/194:46 pmORD - GRK
1 stop5h 43mAmerican Airlines
Tue 12/303:58 pmGRK - ORD
1 stop6h 22mAmerican Airlines
Deal found 12/15$639

Find flight deals from Illinois to Killeen

Keep the following information in mind while searching for Illinois to Killeen flight deals. Data was last updated December 17, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$249
(American Airlines)

One-way from

$224
(American Airlines)
Provider with most accurate pricing for Chicago (CHI)-Killeen Fort Hood Regional flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Killeen Fort Hood Regional flights.
Search Deals
From Illinois to Killeen Fort Hood Regional
Search Deals
One-way flight from Illinois to Killeen Fort Hood Regional
Search Deals

Cheapflights Fare Finder

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

Fly from

Illinois

Fly to

Killeen

Route

Depart

Return

Price

St. LouisKilleen

STL - GRK

STLGRK

Lambert-St Louis

Thu 2/26

5:14 am-9:41 am

1 stop4h 27m

Killeen Fort Hood Regional

Sat 2/28

7:00 am-10:59 am

1 stop3h 59m

$249

ChicagoKilleen

ORD - GRK

ORDGRK

Chicago O'Hare Intl

Thu 1/22

6:54 am-12:01 pm

1 stop5h 07m

Killeen Fort Hood Regional

Tue 1/27

12:31 pm-7:29 pm

1 stop6h 58m

$387

ChicagoKilleen

ORD - GRK

ORDGRK

Chicago O'Hare Intl

Fri 1/23

5:05 am-10:05 am

1 stop5h 00m

Killeen Fort Hood Regional

Tue 1/27

7:00 am-11:55 am

1 stop4h 55m

$397

ChicagoKilleen

ORD - GRK

ORDGRK

Chicago O'Hare Intl

Thu 1/1

10:29 am-3:27 pm

1 stop4h 58m

$224

ChicagoKilleen

ORD - GRK

ORDGRK

Chicago O'Hare Intl

Tue 12/23

9:00 am-3:29 pm

1 stop6h 29m

$308

ChicagoKilleen

ORD - GRK

ORDGRK

Chicago O'Hare Intl

Mon 12/22

1:15 pm-5:56 pm

1 stop4h 41m

$486

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Best time to book a flight from Illinois to Killeen

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

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

Currently, January is the cheapest month in which you can book a flight from Illinois to Killeen (average of $73). Flying from Illinois to Killeen in September is currently the most expensive (average of $154). 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.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Killeen. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Killeen from Illinois?

    Most people fly into Killeen Fort Hood Regional (GRK) if they book a flight to Killeen from Illinois. Fort Hood Regional is conveniently located just 6.9 mi from Killeen’s city center.

  • How long is the flight from Illinois to Killeen?

    American Airlines can get you from Illinois to Killeen in just under 4h 27m. Your travel time can differ by up to . There are 678 mi between Illinois and Killeen.

  • What are the most popular routes from Illinois to Killeen?

    While some choose either Lambert-St Louis - Killeen Fort Hood Regional or Champaign University-Willard - Killeen Fort Hood Regional, Chicago O'Hare Intl - Killeen Fort Hood Regional is the most popular route from Illinois to Killeen.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Illinois to Killeen (average of $73). Flying from Illinois to Killeen in September is currently the most expensive (average of $154). 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

Traveling to a place near Killeen?

Book flights to Killeen if you plan to visit one of these locations
Copperas Cove
Temple

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Alternative routes for Illinois to Killeen

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Illinois to Killeen

Discover the top airline that operate flights from Illinois to Killeen. 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 December 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$234Average$450FlexibilityNo cancel feeOn-time71%

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