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Killeen

$311+ Cheap flights from Illinois to Killeen (GRK)

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 12/24. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — GRK
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Illinois to Killeen

Keep the following information in mind while searching for Illinois to Killeen flight deals. Data was last updated September 11, 2025.

Round-trip from

$311
(American Airlines)
From Illinois to Killeen Fort Hood Regional
Search Deals

Find 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 September 11, 2025.

This American Airlines deal was found by Cheapflights users on 9/10. 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 12/245:17 amSTL - GRK
1 stop4h 34mAmerican Airlines
Wed 12/3110:21 amGRK - STL
1 stop6h 49mAmerican Airlines
Deal found 9/10$311
This American Airlines deal was found by Cheapflights users on 9/9. 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 10/305:11 amSTL - GRK
1 stop6h 53mAmerican Airlines
Sat 11/12:48 pmGRK - STL
2 stops7h 20mAmerican Airlines
Deal found 9/9$316
This American Airlines deal was found by Cheapflights users on 9/10. 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 10/245:20 amSTL - GRK
1 stop4h 46mAmerican Airlines
Mon 11/105:05 amGRK - STL
1 stop3h 52mAmerican Airlines
Deal found 9/10$363
This American Airlines deal was found by Cheapflights users on 9/11. 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 10/292:15 pmSTL - GRK
2 stops8h 37mAmerican Airlines
Sun 11/26:53 pmGRK - STL
1 stop3h 36mAmerican Airlines
Deal found 9/11$368
This American Airlines deal was found by Cheapflights users on 9/10. 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 10/16:30 amMLI - GRK
1 stop4h 34mAmerican Airlines
Mon 10/612:34 pmGRK - MLI
1 stop4h 22mAmerican Airlines
Deal found 9/10$381
This American Airlines deal was found by Cheapflights users on 9/10. 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 9/175:40 pmMLI - GRK
1 stop4h 52mAmerican Airlines
Sat 9/2012:19 pmGRK - MLI
1 stop4h 51mAmerican Airlines
Deal found 9/10$411
This American Airlines deal was found by Cheapflights users on 9/10. 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 10/195:00 amORD - GRK
1 stop7h 04mAmerican Airlines
Sun 10/266:13 pmGRK - ORD
1 stop5h 00mAmerican Airlines
Deal found 9/10$437
This American Airlines deal was found by Cheapflights users on 9/11. 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 9/135:16 pmORD - GRK
1 stop5h 29mAmerican Airlines
Tue 9/164:40 pmGRK - ORD
1 stop7h 19mAmerican Airlines
Deal found 9/11$443
This American Airlines deal was found by Cheapflights users on 9/10. 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 9/136:30 amMLI - GRK
1 stop5h 19mAmerican Airlines
Thu 9/184:32 pmGRK - MLI
1 stop6h 33mAmerican Airlines
Deal found 9/10$460
This American Airlines deal was found by Cheapflights users on 9/11. 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 9/135:16 pmORD - GRK
1 stop5h 29mAmerican Airlines
Mon 9/154:40 pmGRK - ORD
1 stop7h 19mAmerican Airlines
Deal found 9/11$486
This American Airlines deal was found by Cheapflights users on 9/9. 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 10/3112:03 pmORD - GRK
1 stop5h 40mAmerican Airlines
Sun 11/26:53 pmGRK - ORD
1 stop4h 38mAmerican Airlines
Deal found 9/9$503
This American Airlines deal was found by Cheapflights users on 9/9. 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 10/306:45 amORD - GRK
1 stop5h 19mAmerican Airlines
Sun 11/25:05 amGRK - ORD
1 stop4h 54mAmerican Airlines
Deal found 9/9$507

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 September 11, 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

Wed 12/24

5:17 am-9:51 am

1 stop4h 34m

Killeen Fort Hood Regional

Wed 12/31

10:21 am-5:10 pm

1 stop6h 49m

$311

St. LouisKilleen

STL - GRK

STLGRK

Lambert-St Louis

Thu 10/30

5:11 am-12:04 pm

1 stop6h 53m

Killeen Fort Hood Regional

Sat 11/1

2:48 pm-10:08 pm

2 stops7h 20m

$316

St. LouisKilleen

STL - GRK

STLGRK

Lambert-St Louis

Fri 10/24

5:20 am-10:06 am

1 stop4h 46m

Killeen Fort Hood Regional

Mon 11/10

5:05 am-8:57 am

1 stop3h 52m

$363

St. LouisKilleen

STL - GRK

STLGRK

Lambert-St Louis

Wed 10/29

5:20 am-12:04 pm

1 stop6h 44m

Killeen Fort Hood Regional

Sun 11/2

6:53 pm-10:29 pm

1 stop3h 36m

$363

MolineKilleen

MLI - GRK

MLIGRK

Moline Quad-City

Wed 10/1

6:30 am-11:04 am

1 stop4h 34m

Killeen Fort Hood Regional

Mon 10/6

12:34 pm-4:56 pm

1 stop4h 22m

$381

St. LouisKilleen

STL - GRK

STLGRK

Lambert-St Louis

Sat 3/7

5:49 pm-11:24 pm

1 stop5h 35m

Killeen Fort Hood Regional

Wed 3/11

6:43 pm-10:24 pm

1 stop3h 41m

$431

ChicagoKilleen

ORD - GRK

ORDGRK

Chicago O'Hare Intl

Sun 10/19

5:00 am-12:04 pm

1 stop7h 04m

Killeen Fort Hood Regional

Sun 10/26

6:13 pm-11:13 pm

1 stop5h 00m

$437

ChicagoKilleen

ORD - GRK

ORDGRK

Chicago O'Hare Intl

Fri 10/31

12:03 pm-5:43 pm

1 stop5h 40m

Killeen Fort Hood Regional

Sun 11/2

6:53 pm-11:31 pm

1 stop4h 38m

$503

ChicagoKilleen

ORD - GRK

ORDGRK

Chicago O'Hare Intl

Thu 10/30

6:45 am-12:04 pm

1 stop5h 19m

Killeen Fort Hood Regional

Sun 11/2

5:05 am-9:59 am

1 stop4h 54m

$507

PeoriaKilleen

PIA - GRK

PIAGRK

Greater Peoria

Sat 3/7

10:46 am-3:49 pm

1 stop5h 03m

Killeen Fort Hood Regional

Wed 3/11

10:37 am-2:15 pm

1 stop3h 38m

$518

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 13 results
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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 $316). Flying from Illinois to Killeen in December is currently the most expensive (average of $468). 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 34m. 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 Moline Quad-City - 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 $316). Flying from Illinois to Killeen in December is currently the most expensive (average of $468). 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
Temple
Copperas Cove

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Alternative routes for Illinois to Killeen

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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$234Average$442FlexibilityNo cancel feeOn-time71%

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