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Airport Reliability

HLN · Helena

Helena, MT (HLN)

86%
Departures within 15 minutes
8 min
Average departure delay
87%
Arrivals within 15 minutes
0.7%
Departures cancelled

Based on 1,963 departures and 1,963 arrivals. Data through May 2026.

What the data says

Morning flights do better here.

Departures from HLN departing between 3–6 AM arrived on time 97% of the time, versus 62% between 3–6 PM.

Tuesday comes out ahead.

A small edge: 88% on time on Tuesdays against 81% on Fridays.

When HLN gets messy

On-time by departure window
  • 3–6 AM97%(365 flights)
  • 6–9 AM90%(361 flights)
  • 12–3 PM85%(711 flights)
  • 3–6 PM62%(317 flights)
  • 6–9 PM80%(184 flights)
On-time by weekday
  • Mon84%(280 flights)
  • Tue88%(274 flights)
  • Wed83%(277 flights)
  • Thu81%(273 flights)
  • Fri81%(275 flights)
  • Sat83%(274 flights)
  • Sun86%(285 flights)
On-time trend by month
92%
May

Jun 69% → May 92% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202569%174
July 202570%179
August 202573%182
September 202583%179
October 202588%179
November 202588%144
December 202583%151
January 202694%154
February 202691%140
March 202691%152
April 202691%150
May 202692%154

Airlines departing HLN

Busiest routes from HLN

Based on 1,963 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.