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Airport Reliability

GTF · Great Falls

Great Falls, MT (GTF)

88%
Departures within 15 minutes
5 min
Average departure delay
87%
Arrivals within 15 minutes
0.7%
Departures cancelled

Based on 2,477 departures and 2,476 arrivals. Data through May 2026.

What the data says

Morning-you made the right choice.

Departures from GTF departing between 3–6 AM arrived on time 96% of the time, versus 80% between 9 PM–12 AM.

Wednesday has been the better bet.

A small edge: 91% on time on Wednesdays against 86% on Mondays.

When GTF gets messy

On-time by departure window
  • 3–6 AM96%(364 flights)
  • 6–9 AM93%(460 flights)
  • 9 AM–12 PM94%(179 flights)
  • 12–3 PM84%(639 flights)
  • 3–6 PM82%(241 flights)
  • 6–9 PM85%(517 flights)
  • 9 PM–12 AM80%(56 flights)
On-time by weekday
  • Mon86%(377 flights)
  • Tue91%(328 flights)
  • Wed91%(324 flights)
  • Thu87%(361 flights)
  • Fri86%(373 flights)
  • Sat89%(321 flights)
  • Sun88%(372 flights)
On-time trend by month
87%
May

Jun 85% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202585%232
July 202590%236
August 202585%228
September 202591%196
October 202588%202
November 202590%188
December 202587%206
January 202693%195
February 202686%177
March 202687%197
April 202689%197
May 202687%202

Airlines departing GTF

Busiest routes from GTF

Based on 2,477 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.