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$227+ 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 12/30. Fares are subject to change and may not be available on all flights or dates of travel.
GRK — ORD
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$319
(American Airlines)

One-way from

$227
(American Airlines)
Provider with most accurate pricing for Killeen Fort Hood Regional-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Killeen Fort Hood Regional-Chicago (CHI) flights.
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From Killeen Fort Hood Regional to Illinois
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One-way flight from Killeen Fort Hood Regional to Illinois
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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 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.
Thu 11/2710:34 amGRK - ORD
1 stop4h 45mAmerican Airlines
Thu 12/45:18 amORD - GRK
1 stop6h 00mAmerican Airlines
Deal found 10/30$397
This American Airlines deal was found by Cheapflights users on 10/27. 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 11/124:10 pmGRK - ORD
1 stop6h 10mAmerican Airlines
Sun 11/165:18 amORD - GRK
1 stop4h 46mAmerican Airlines
Deal found 10/27$427
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 11/155:05 amGRK - ORD
1 stop4h 53mAmerican Airlines
Wed 11/198:50 amORD - GRK
1 stop6h 50mAmerican Airlines
Deal found 10/29$429
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.
Tue 12/306:32 pmGRK - ORD
2 stops12h 56mAmerican Airlines
Thu 1/111:48 amORD - GRK
1 stop6h 08mAmerican Airlines
Deal found 10/29$461
This American Airlines deal was found by Cheapflights users on 10/28. 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 11/17:45 amGRK - ORD
1 stop7h 21mAmerican Airlines
Mon 11/35:18 amORD - GRK
1 stop6h 04mAmerican Airlines
Deal found 10/28$526
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.
Wed 12/3111:57 amGRK - ORD
1 stop5h 20mAmerican Airlines
Thu 1/17:18 amORD - GRK
2 stops10h 38mAmerican Airlines
Deal found 10/29$534
This American Airlines deal was found by Cheapflights users on 10/28. 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 11/77:15 pmGRK - ORD
1 stop4h 22mAmerican Airlines
Sun 11/95:18 amORD - GRK
1 stop6h 02mAmerican Airlines
Deal found 10/28$547
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.
Tue 12/306:32 pmGRK - ORD
1 stop4h 43mAmerican Airlines
Fri 1/25:21 amORD - GRK
1 stop6h 06mAmerican Airlines
Deal found 10/29$608
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.
Sun 11/305:05 amGRK - STL
1 stop3h 51mAmerican Airlines
Tue 12/25:17 amSTL - GRK
1 stop6h 03mAmerican Airlines
Deal found 10/30$734

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 October 30, 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

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Sat 2/21

6:24 am-11:00 am

1 stop4h 36m

Lambert-St Louis

Tue 2/24

5:55 pm-10:24 pm

1 stop4h 29m

$319

KilleenChicago

GRK - ORD

GRKORD

Killeen Fort Hood Regional

Wed 2/25

12:01 pm-5:32 pm

1 stop5h 31m

Chicago O'Hare Intl

Sat 2/28

5:11 pm-10:24 pm

1 stop5h 13m

$383

KilleenChicago

GRK - ORD

GRKORD

Killeen Fort Hood Regional

Thu 11/27

10:34 am-3:19 pm

1 stop4h 45m

Chicago O'Hare Intl

Thu 12/4

5:18 am-11:18 am

1 stop6h 00m

$397

KilleenChicago

GRK - ORD

GRKORD

Killeen Fort Hood Regional

Wed 11/12

4:10 pm-10:20 pm

1 stop6h 10m

Chicago O'Hare Intl

Sun 11/16

5:18 am-10:04 am

1 stop4h 46m

$427

KilleenChicago

GRK - ORD

GRKORD

Killeen Fort Hood Regional

Sat 11/15

5:05 am-9:58 am

1 stop4h 53m

Chicago O'Hare Intl

Wed 11/19

8:50 am-3:40 pm

1 stop6h 50m

$429

KilleenChicago

GRK - ORD

GRKORD

Killeen Fort Hood Regional

Sat 2/21

6:40 pm-11:40 pm

1 stop5h 00m

Chicago O'Hare Intl

Wed 2/25

8:00 am-8:13 pm

2 stops12h 13m

$434

KilleenChampaign

GRK - CMI

GRKCMI

Killeen Fort Hood Regional

Wed 2/18

10:14 am-2:24 pm

1 stop4h 10m

Champaign University-Willard

Sat 2/21

2:54 pm-8:13 pm

1 stop5h 19m

$436

KilleenChicago

GRK - ORD

GRKORD

Killeen Fort Hood Regional

Wed 12/31

10:21 am-5:17 pm

1 stop6h 56m

Chicago O'Hare Intl

Thu 1/1

5:21 am-11:27 am

1 stop6h 06m

$480

KilleenChicago

GRK - ORD

GRKORD

Killeen Fort Hood Regional

Tue 12/30

11:57 am-5:17 pm

1 stop5h 20m

Chicago O'Hare Intl

Thu 1/1

5:21 am-11:27 am

1 stop6h 06m

$480

KilleenPeoria

GRK - PIA

GRKPIA

Killeen Fort Hood Regional

Wed 3/25

10:37 am-2:15 pm

1 stop3h 38m

Greater Peoria

Sat 3/28

3:45 pm-7:42 pm

1 stop3h 57m

$619

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 14 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, March is the cheapest month in which you can book a flight from Killeen to Illinois (average of $59). Flying from Killeen to Illinois in February is currently the most expensive (average of $188). 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 October 30, 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
11,034 reviews

Boarding

7.5

Crew

8.0

Overall

7.2

Food

6.4

Comfort

7.2

Entertainment

6.9

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

Boarding

7.5

Crew

8.0

Overall

7.2

Food

6.4

Comfort

7.2

Entertainment

6.9

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 4h 36m. Your travel time can differ by up to . The distance from Killeen to Illinois is about 678 mi.

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

    The most popular route from Killeen to Illinois is Killeen Fort Hood Regional - Chicago O'Hare Intl. You may also consider Killeen Fort Hood Regional - Lambert-St Louis 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, March is the cheapest month in which you can book a flight from Killeen to Illinois (average of $59). Flying from Killeen to Illinois in February is currently the most expensive (average of $188). 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 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$317Average$485FlexibilityNo cancel feeOn-time71%

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