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$274+ 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 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
GRK — ORD
Feb 27 — Mar 61
Fri 2/27
Fri 3/6
1 adult, Economy
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Cheap 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 January 28, 2026.

This American Airlines deal was found by Cheapflights users on 1/27. 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.
Mon 2/95:21 am
GRK
-
STL
1 stop3h 28m
American Airlines
Sat 2/144:13 pm
STL
-
GRK
1 stop6h 23m
American Airlines
Deal found 1/27$406
This American Airlines deal was found by Cheapflights users on 1/26. 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 3/126:33 pm
GRK
-
ORD
1 stop5h 03m
American Airlines
Sat 3/144:49 pm
ORD
-
GRK
1 stop5h 14m
American Airlines
Deal found 1/26$457
This American Airlines deal was found by Cheapflights users on 1/26. 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 4/283:54 pm
GRK
-
CMI
1 stop5h 13m
American Airlines
Tue 5/53:01 pm
CMI
-
GRK
1 stop4h 53m
American Airlines
Deal found 1/26$526
This American Airlines deal was found by Cheapflights users on 1/26. 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 4/283:54 pm
GRK
-
CMI
1 stop5h 13m
American Airlines
Sat 5/92:18 pm
CMI
-
GRK
2 stops7h 34m
American Airlines
Deal found 1/26$532
This American Airlines deal was found by Cheapflights users on 1/25. 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 6/177:24 pm
GRK
-
ORD
1 stop5h 02m
American Airlines
Wed 6/245:00 am
ORD
-
GRK
1 stop4h 32m
American Airlines
Deal found 1/25$556
This American Airlines deal was found by Cheapflights users on 1/26. 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 4/283:54 pm
GRK
-
CMI
1 stop5h 13m
American Airlines
Wed 5/66:45 am
CMI
-
GRK
1 stop5h 53m
American Airlines
Deal found 1/26$556
This American Airlines deal was found by Cheapflights users on 1/26. 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 5/13:54 pm
GRK
-
CMI
1 stop5h 03m
American Airlines
Sat 5/92:18 pm
CMI
-
GRK
2 stops7h 34m
American Airlines
Deal found 1/26$562
This American Airlines deal was found by Cheapflights users on 1/26. 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 4/303:54 pm
GRK
-
CMI
1 stop5h 03m
American Airlines
Wed 5/66:00 am
CMI
-
GRK
2 stops12h 39m
American Airlines
Deal found 1/26$566
This American Airlines deal was found by Cheapflights users on 1/26. 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 5/210:07 am
GRK
-
CMI
1 stop4h 24m
American Airlines
Sat 5/92:18 pm
CMI
-
GRK
2 stops7h 34m
American Airlines
Deal found 1/26$567
This American Airlines deal was found by Cheapflights users on 1/25. 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 1/305:21 am
GRK
-
PIA
1 stop5h 18m
American Airlines
Sun 2/13:55 pm
PIA
-
GRK
1 stop6h 48m
American Airlines
Deal found 1/25$569
This American Airlines deal was found by Cheapflights users on 1/26. 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 4/303:54 pm
GRK
-
CMI
1 stop5h 03m
American Airlines
Tue 5/56:45 am
CMI
-
GRK
1 stop4h 36m
American Airlines
Deal found 1/26$571
This American Airlines deal was found by Cheapflights users on 1/26. 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 4/295:00 am
GRK
-
CMI
2 stops8h 48m
American Airlines
Sat 5/92:18 pm
CMI
-
GRK
2 stops7h 34m
American Airlines
Deal found 1/26$572

Find flight deals from Killeen to Illinois

Keep the following information in mind while searching for Killeen to Illinois flight deals. Data was last updated January 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$406
(American Airlines)

One-way from

$274
(American Airlines)
Provider with most accurate pricing for Killeen Fort Hood Regional-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Killeen Fort Hood Regional-Chicago (CHI) flights.
Search Deals
From Killeen Fort Hood Regional to Illinois
Search Deals
One-way flight from Killeen Fort Hood Regional to Illinois
Search Deals

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 January 28, 2026.
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

Mon 2/9

5:21 am-8:49 am

1 stop3h 28m

Lambert-St Louis

Sat 2/14

4:13 pm-10:36 pm

1 stop6h 23m

$406

KilleenChicago

GRK - ORD

GRKORD

Killeen Fort Hood Regional

Thu 3/12

6:33 pm-11:36 pm

1 stop5h 03m

Chicago O'Hare Intl

Sat 3/14

4:49 pm-10:03 pm

1 stop5h 14m

$457

KilleenChicago

GRK - ORD

GRKORD

Killeen Fort Hood Regional

Wed 6/17

7:24 pm-12:26 am

1 stop5h 02m

Chicago O'Hare Intl

Wed 6/24

5:00 am-9:32 am

1 stop4h 32m

$556

KilleenChampaign

GRK - CMI

GRKCMI

Killeen Fort Hood Regional

Tue 4/28

3:54 pm-9:07 pm

1 stop5h 13m

Champaign University-Willard

Mon 5/4

6:45 am-11:21 am

1 stop4h 36m

$556

KilleenChampaign

GRK - CMI

GRKCMI

Killeen Fort Hood Regional

Thu 4/30

3:54 pm-8:57 pm

1 stop5h 03m

Champaign University-Willard

Tue 5/5

6:45 am-11:21 am

1 stop4h 36m

$571

KilleenChampaign

GRK - CMI

GRKCMI

Killeen Fort Hood Regional

Sun 5/3

3:54 pm-8:57 pm

1 stop5h 03m

Champaign University-Willard

Sat 5/9

2:18 pm-9:52 pm

2 stops7h 34m

$582

KilleenChampaign

GRK - CMI

GRKCMI

Killeen Fort Hood Regional

Fri 5/1

3:54 pm-8:57 pm

1 stop5h 03m

Champaign University-Willard

Mon 5/4

6:45 am-11:21 am

1 stop4h 36m

$586

KilleenChampaign

GRK - CMI

GRKCMI

Killeen Fort Hood Regional

Fri 5/1

3:54 pm-8:57 pm

1 stop5h 03m

Champaign University-Willard

Sun 5/10

3:01 pm-9:52 pm

1 stop6h 51m

$586

KilleenChampaign

GRK - CMI

GRKCMI

Killeen Fort Hood Regional

Sat 5/2

10:07 am-2:31 pm

1 stop4h 24m

Champaign University-Willard

Mon 5/4

6:45 am-11:21 am

1 stop4h 36m

$591

KilleenChampaign

GRK - CMI

GRKCMI

Killeen Fort Hood Regional

Wed 4/29

5:00 am-1:48 pm

2 stops8h 48m

Champaign University-Willard

Wed 5/6

6:45 am-12:38 pm

1 stop5h 53m

$597

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 17 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, January is the cheapest month in which you can book a flight from Killeen to Illinois (average of $56). Flying from Killeen to Illinois in July is currently the most expensive (average of $140). 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 January 28, 2026.
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
11,201 reviews

Boarding

7.5

Comfort

7.2

Entertainment

6.9

Overall

7.2

Crew

8.0

Food

6.4

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
11,201 reviews
American Airlines
7.2
Good
11,201 reviews

Boarding

7.5

Comfort

7.2

Entertainment

6.9

Overall

7.2

Crew

8.0

Food

6.4

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 3h 28m. 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 - Greater Peoria 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, January is the cheapest month in which you can book a flight from Killeen to Illinois (average of $56). Flying from Killeen to Illinois in July is currently the most expensive (average of $140). 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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Alternative routes for Killeen to Illinois

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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 January 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$317Average$488FlexibilityNo cancel feeOn-time71%

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