The cheapest times to fly from CMI to GRK are

  • January 1st to February 25th
  • April 2nd to April 22nd
  • August 13th to November 11th (except the week of October 15th)
  • December 3rd to December 16th

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from CMI to GRK is late August to early September. Prices can be as high as $1229 for Sunday flights during mid to late November, or as low as $328 for Wednesday flights around late August to early September.


When to Fly to Killeen

Flying from Champaign/Urbana, IL (CMI) to Killeen, TX (GRK) will usually cost between $333 to $618 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late August to early September with an average ticket price of $343. Due to high demand the most expensive time to fly is mid to late November, with an average price of $611. Planning your trip to low-cost times can easily save you $269 on economy flights and even more on first-class flights. Generally, any price below $409 can be considered a good price for a round-trip CMI to GRK flight.

See below for a graph of average weekly prices for the CMI to GRK route. All prices are for round-trip tickets in USD.

CMI to GRK Flight Prices

Compared to other flights, the CMI to GRK flight is much cheaper than the average and costs less than the average flight leaving from Champaign. The average price per mile (for a direct flight) is $0.31, which is in the normal range for a flight.


Flight Prices by Day of the Week

Wednesday is usually the cheapest day to depart and return on this flight. Sundays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $192 (34%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Wednesday and returning a week later will cost an average of $362. Return trip prices are from the GRK to CMI flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from CMI to GRK can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 2 hour 27 minutes may not be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from CMI to GRK while comparing.

Destination alternative #1: Dallas/Fort Worth International Airport (DFW) in Dallas/Fort Worth, TX

  • 135 miles (217 km) away from GRK
  • Usually 24.82% less expensive than GRK
  • Nonstop flights available

See CMI to DFW flights

Destination alternative #2: San Antonio International Airport (SAT) in San Antonio, TX

  • 113 miles (182 km) away from GRK
  • Usually 17.97% less expensive than GRK
  • 1-layover flights available

See CMI to SAT flights

Destination alternative #3: Austin – Bergstrom International Airport (AUS) in Austin, TX

  • 61 miles (98 km) away from GRK
  • Usually 16.01% less expensive than GRK
  • 1-layover flights available

See CMI to AUS flights

Destination alternative #4: Easterwood Field Airport (CLL) in College Station/Bryan, TX

  • 93 miles (150 km) away from GRK
  • Usually 11.25% less expensive than GRK
  • 1-layover flights available

See CMI to CLL flights


Flight Questions Answered

Still have questions about flying from CMI to GRK? We’ve got answers.

Which airlines fly this route?

You can find 1 major airline flying this route most often: American, and potentially more during busy seasons.

How far away is it from Robert Gray AAF Airport to University of Illinois/Willard Airport?

The distance between the two airports is roughly 819 miles or 1318 kilometers.

How long does it take to fly from CMI to GRK?

The real-world flight time for a nonstop CMI to GRK flight is about 2 hour 27 minutes.

How many flights go between Champaign/Urbana, IL and Killeen, TX?

It depends on the day of the week and the date, but a typical day might have around 21 available flights from CMI to GRK.


Airport Location Info


Departing Airport

Origination code CMI
Origination airport name University of Illinois/Willard Airport
City Champaign/Urbana, IL
Country the United States
Latitude 40
Longitude -88.3

Return Airport

Destination code GRK
Destination airport name Robert Gray AAF Airport
City Killeen, TX
Country the United States
Latitude 31.1
Longitude -97.8


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.