HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$163+ Cheap flights from Killeen (GRK) to Illinois

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 11/26. Fares are subject to change and may not be available on all flights or dates of travel.
GRK — ORD
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Killeen to Illinois with Cheapflights

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 Illinois

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

Round-trip from

$299
(American Airlines)

One-way from

$163
(American Airlines)
From Killeen Fort Hood Regional to Illinois
Search Deals
One-way flight from Killeen Fort Hood Regional to Illinois
Search Deals

Find flight deals from Killeen to Illinois

Cheapest flights from Killeen to Illinois
Explore the most affordable flight options available from Killeen to Illinois. 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 9/11. 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.
Fri 10/34:40 pmGRK - STL
1 stop6h 10mAmerican Airlines
Sun 10/55:18 amSTL - GRK
1 stop4h 20mAmerican Airlines
Deal found 9/11$311
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.
Tue 10/712:34 pmGRK - STL
2 stops7h 52mAmerican Airlines
Sat 10/115:09 pmSTL - GRK
1 stop4h 24mAmerican Airlines
Deal found 9/11$316
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 10/24:32 pmGRK - STL
2 stops7h 17mAmerican Airlines
Mon 10/610:10 amSTL - GRK
1 stop4h 20mAmerican Airlines
Deal found 9/9$368
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.
Sat 11/84:10 pmGRK - ORD
1 stop5h 11mAmerican Airlines
Tue 11/118:50 amORD - GRK
1 stop6h 50mAmerican Airlines
Deal found 9/9$408
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.
Wed 10/2210:36 amGRK - ORD
1 stop7h 24mAmerican Airlines
Thu 10/235:00 amORD - GRK
1 stop5h 06mAmerican Airlines
Deal found 9/9$412
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 10/96:13 pmGRK - ORD
1 stop5h 40mAmerican Airlines
Wed 10/156:16 pmORD - GRK
1 stop4h 36mAmerican Airlines
Deal found 9/9$438
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.
Wed 11/266:50 pmGRK - STL
1 stop3h 44mAmerican Airlines
Sat 11/295:17 amSTL - GRK
1 stop4h 44mAmerican Airlines
Deal found 9/9$446
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.
Mon 9/294:40 pmGRK - ORD
1 stop7h 19mAmerican Airlines
Sun 10/56:00 amORD - GRK
1 stop5h 08mAmerican Airlines
Deal found 9/10$476
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 9/194:40 pmGRK - ORD
1 stop7h 19mAmerican Airlines
Sat 9/206:30 pmORD - GRK
1 stop4h 15mAmerican Airlines
Deal found 9/9$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.
Wed 11/264:10 pmGRK - STL
1 stop6h 24mAmerican Airlines
Sun 11/307:00 amSTL - GRK
1 stop4h 20mAmerican Airlines
Deal found 9/9$563
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.
Wed 10/222:48 pmGRK - ORD
2 stops5h 36mAmerican Airlines
Fri 10/245:17 pmORD - GRK
1 stop4h 16mAmerican Airlines
Deal found 9/9$868

Cheapflights Fare Finder

 
Customize your flight search to find flights from Killeen to Illinois 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 Killeen to Illinois that are best for you.

Fly from

Killeen

Fly to

Illinois

Route

Depart

Return

Price

KilleenChicago

GRK - ORD

GRKORD

Killeen Fort Hood Regional

Sat 2/28

5:18 am-6:00 pm

2 stops12h 42m

Chicago O'Hare Intl

Wed 3/4

5:00 am-9:28 am

1 stop4h 28m

$299

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Fri 10/3

4:40 pm-10:50 pm

1 stop6h 10m

Lambert-St Louis

Sun 10/5

5:18 am-9:38 am

1 stop4h 20m

$311

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Tue 10/7

12:34 pm-8:26 pm

2 stops7h 52m

Lambert-St Louis

Sat 10/11

5:09 pm-9:33 pm

1 stop4h 24m

$316

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Thu 10/2

4:32 pm-11:49 pm

2 stops7h 17m

Lambert-St Louis

Mon 10/6

10:10 am-2:30 pm

1 stop4h 20m

$368

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Sat 2/21

5:18 am-4:06 pm

2 stops10h 48m

Lambert-St Louis

Tue 2/24

6:04 am-11:24 pm

2 stops17h 20m

$370

KilleenChampaign

GRK - CMI

GRKCMI

Killeen Fort Hood Regional

Wed 2/18

10:26 am-2:22 pm

1 stop3h 56m

Champaign University-Willard

Sat 2/21

1:20 pm-11:24 pm

2 stops10h 04m

$401

KilleenChicago

GRK - ORD

GRKORD

Killeen Fort Hood Regional

Sat 11/8

4:10 pm-9:21 pm

1 stop5h 11m

Chicago O'Hare Intl

Tue 11/11

8:50 am-3:40 pm

1 stop6h 50m

$408

KilleenChicago

GRK - ORD

GRKORD

Killeen Fort Hood Regional

Wed 10/22

10:36 am-6:00 pm

1 stop7h 24m

Chicago O'Hare Intl

Thu 10/23

5:00 am-10:06 am

1 stop5h 06m

$412

KilleenChicago

GRK - ORD

GRKORD

Killeen Fort Hood Regional

Wed 10/22

5:16 am-12:30 pm

1 stop7h 14m

Chicago O'Hare Intl

Fri 10/24

5:00 am-10:06 am

1 stop5h 06m

$412

KilleenChicago

GRK - ORD

GRKORD

Killeen Fort Hood Regional

Mon 9/29

4:40 pm-9:42 pm

1 stop5h 02m

Chicago O'Hare Intl

Sun 10/5

6:00 am-11:08 am

1 stop5h 08m

$476

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 20 results
1
2

Best time to book a flight from Killeen to Illinois

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

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

Currently, August is the cheapest month in which you can book a flight from Killeen to Illinois (average of $245). Flying from Killeen to Illinois in March is currently the most expensive (average of $321). 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 Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated September 11, 2025.
See what other customers who have flown with American Airlines from Killeen to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
10,000 reviews

Crew

8.0

Boarding

7.5

Entertainment

6.9

Overall

7.2

Food

6.4

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

BNA - ORD

My flight was 8 hours delayed, so I missed my connecting flight to Dublin. I understand it’s not the staff’s fault but the lack of sympathy and apology was appalling. I had been sat in the airport since 4am until 3pm and they did not seem understanding. Not good. Need better customer service.
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Crew

8.0

Boarding

7.5

Entertainment

6.9

Overall

7.2

Food

6.4

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

BNA - ORD

My flight was 8 hours delayed, so I missed my connecting flight to Dublin. I understand it’s not the staff’s fault but the lack of sympathy and apology was appalling. I had been sat in the airport since 4am until 3pm and they did not seem understanding. Not good. Need better customer service.

Related info for your journey

Find useful and relevant information for your journey from Killeen to Illinois. 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 from for flights from Killeen to Illinois?

    Located just 6.9 mi from the city center, Killeen Fort Hood Regional (GRK) is the airport most travelers will use when flying to Illinois from Killeen.

  • How long is the flight from Killeen to Illinois?

    American Airlines can get you from Killeen to Illinois in just under 12h 42m. Your travel time can differ by up to . The distance from Killeen to Illinois is about 932 mi.

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

    The most popular route from Killeen to Illinois is Killeen Fort Hood Regional - Lambert-St Louis. You may also consider Killeen Fort Hood Regional - Chicago O'Hare Intl or Killeen Fort Hood Regional - Champaign University-Willard.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Killeen to Illinois (average of $245). Flying from Killeen to Illinois in March is currently the most expensive (average of $321). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Killeen to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
Dallas/Fort Worth to John F Kennedy Intl flights
Dallas/Fort Worth to Las Vegas flights
Dallas/Fort Worth to LaGuardia flights
Dallas/Fort Worth to O'Hare Intl flights
Dallas/Fort Worth to Newark flights
Dallas/Fort Worth to Denver flights
Dallas/Fort Worth to Seattle flights
Dallas/Fort Worth to Boston flights
Dallas/Fort Worth to Los Angeles flights
Hobby to John F Kennedy Intl flights
Hobby to Las Vegas flights
Dallas/Fort Worth to Orlando flights
Dallas/Fort Worth to San Francisco flights
Hobby to Newark flights
Hobby to LaGuardia flights
Dallas/Fort Worth to Baltimore flights
Dallas/Fort Worth to Midway flights
George Bush Intcntl to John F Kennedy Intl flights
Dallas/Fort Worth to Dulles Intl flights
George Bush Intcntl to Las Vegas flights
George Bush Intcntl to Newark flights
Austin to John F Kennedy Intl flights
Dallas/Fort Worth to Reagan-National flights
Austin to Las Vegas flights
Love Field to Las Vegas flights
Hobby to Denver flights
Dallas/Fort Worth to Atlanta flights
Austin to Newark flights
Dallas/Fort Worth to Detroit flights
George Bush Intcntl to LaGuardia flights
Dallas/Fort Worth to Miami flights
Dallas/Fort Worth to Ontario flights
Dallas/Fort Worth to Salt Lake City flights
Dallas/Fort Worth to Sky Harbor Intl flights
Dallas/Fort Worth to Fort Lauderdale flights
Dallas/Fort Worth to San Diego flights
Hobby to Dallas/Fort Worth flights
Austin to Los Angeles flights
Hobby to Midway flights
George Bush Intcntl to Denver flights
Hobby to O'Hare Intl flights
Hobby to Orlando flights
Austin to Denver flights
Austin to LaGuardia flights
Dallas/Fort Worth to Philadelphia flights
Hobby to Seattle flights
Hobby to Miami flights
Dallas/Fort Worth to Hobby flights
Hobby to Los Angeles flights
Austin to O'Hare Intl flights

Top airline flying from Killeen to Illinois

Discover the top airline that operate flights from Killeen to Illinois. 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$337Average$488FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.