The cheapest times to fly from MSO to GRK are

  • January 8th to February 25th
  • March 26th to May 6th
  • May 28th to June 10th
  • October 15th to December 9th (except the weeks of November 19th and November 26th)

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 MSO to GRK is late October to early November. Prices can be as high as $835 for Sunday flights during early to mid March, or as low as $318 for Wednesday flights around late October to early November.


When to Fly to Killeen

Flying from Missoula, MT (MSO) to Killeen, TX (GRK) will usually cost between $318 to $645 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late October to early November with an average ticket price of $364. Due to high demand the most expensive time to fly is early to mid March, with an average price of $609. Planning your trip to low-cost times can easily save you $245 on economy flights and even more on first-class flights. Generally, any price below $458 can be considered a good price for a round-trip MSO to GRK flight.

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

MSO to GRK Flight Prices

Compared to other flights, the MSO to GRK flight is much cheaper than the average and costs less than the average flight leaving from Missoula. The average price per mile (for a direct flight) is $0.2, which is below average.


Flight Prices by Day of the Week

Wednesday is usually the cheapest day to fly to GRK, and Tuesday the cheapest day to fly back into MSO. 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 $82 (15%) 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 $430. Return trip prices are from the GRK to MSO 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 MSO 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 3 hour 29 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 MSO 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 27.84% less expensive than GRK
  • Nonstop flights available

See MSO to DFW flights

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

  • 113 miles (182 km) away from GRK
  • Usually 15.28% less expensive than GRK
  • 1-layover flights available

See MSO to SAT flights

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

  • 61 miles (98 km) away from GRK
  • Usually 5.35% less expensive than GRK
  • 1-layover flights available

See MSO to AUS flights


Flight Questions Answered

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

Which airlines fly this route?

You can find 4 major airlines flying this route most often: Alaska, American, Delta, United, and potentially more during busy seasons.

How far away is it from Robert Gray AAF Airport to Missoula International Airport?

The distance between the two airports is roughly 1394 miles or 2243 kilometers.

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

The real-world flight time for a nonstop MSO to GRK flight is about 3 hour 29 minutes.

How many flights go between Missoula, MT and Killeen, TX?

It depends on the day of the week and the date, but a typical day might have around 18 available flights from MSO to GRK.


Airport Location Info


Departing Airport

Origination code MSO
Origination airport name Missoula International Airport
City Missoula, MT
Country the United States
Latitude 46.9
Longitude -114.1

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.