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$851+ Cheap flights from Killeen (GRK) to Illinois

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 5/26. Fares are subject to change and may not be available on all flights or dates of travel.
GRK — ORD
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$851
(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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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 March 28, 2025.

This American Airlines deal was found by Cheapflights users on 3/25. 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.
Mon 5/266:20 amGRK - STL
1 stop3h 34mAmerican Airlines
Fri 5/307:19 pmSTL - GRK
1 stop14h 30mAmerican Airlines
Deal found 3/25$851

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 March 28, 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

Mon 5/26

6:20 am-9:54 am

1 stop3h 34m

Lambert-St Louis

Fri 5/30

7:19 pm-9:49 am

1 stop14h 30m

$851

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

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 $323). 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.

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 March 28, 2025.
American Airlines
7.2
Good
10,000 reviews

Boarding

7.5

Comfort

7.2

Food

6.5

Entertainment

6.9

Overall

7.2

Crew

8.0

Reviews

1 / 20
6.0
Good

sheila,Mar 2025

DFW - MSP

We were delayed for 3 hours with no real reason or offer for compensation
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Boarding

7.5

Comfort

7.2

Food

6.5

Entertainment

6.9

Overall

7.2

Crew

8.0

Reviews

1 / 20
6.0
Good

sheila,Mar 2025

DFW - MSP

We were delayed for 3 hours with no real reason or offer for compensation

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.

  • 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, 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 $323). 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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$337Average$450FlexibilityNo cancel feeOn-time71%
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