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$183+ 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 2/11. Fares are subject to change and may not be available on all flights or dates of travel.
GRK — ORD
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
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 December 15, 2025.

This American Airlines deal was found by Cheapflights users on 12/14. 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 12/1910:21 amGRK - STL
1 stop6h 49mAmerican Airlines
Sun 12/217:00 amSTL - GRK
1 stop4h 27mAmerican Airlines
Deal found 12/14$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.
Tue 12/236:32 pmGRK - ORD
1 stop4h 43mAmerican Airlines
Fri 12/268:25 amORD - GRK
1 stop7h 02mAmerican Airlines
Deal found 12/15$515

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 December 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$327
(American Airlines)

One-way from

$183
(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 December 15, 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

Fri 1/16

5:21 am-10:54 am

1 stop5h 33m

Chicago O'Hare Intl

Tue 1/20

11:56 am-6:53 pm

1 stop6h 57m

$327

KilleenChampaign

GRK - CMI

GRKCMI

Killeen Fort Hood Regional

Wed 2/11

5:00 pm-9:06 pm

1 stop4h 06m

$183

KilleenPeoria

GRK - PIA

GRKPIA

Killeen Fort Hood Regional

Mon 1/5

3:58 pm-10:41 pm

1 stop6h 43m

$480

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Sun 12/28

11:57 am-5:10 pm

1 stop5h 13m

$480

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Sun 12/28

6:32 pm-2:47 pm

3 stops44h 15m

$1,303

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

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 $58). 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 December 15, 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
11,051 reviews

Food

6.5

Comfort

7.2

Boarding

7.5

Overall

7.2

Entertainment

6.9

Crew

8.0

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
11,051 reviews
American Airlines
7.2
Good
11,051 reviews

Food

6.5

Comfort

7.2

Boarding

7.5

Overall

7.2

Entertainment

6.9

Crew

8.0

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 5h 33m. 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 - 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 $58). 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 December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$317Average$485FlexibilityNo cancel feeOn-time71%

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