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Airport Reliability

GUM · Guam

Guam, TT (GUM)

88%
Departures within 15 minutes
2 min
Average departure delay
86%
Arrivals within 15 minutes
2.2%
Departures cancelled

Based on 730 departures and 730 arrivals. Data through May 2026.

What the data says

Skip Saturday if you can.

Departures from GUM arrived on time 97% of the time on Tuesdays. On Saturdays: 83%.

Recent months have been rougher.

Departures from GUM arrived on time 84% of the time over the last three months in the data, compared with 92% in the three months before that.

When GUM gets messy

On-time by departure window
  • 6–9 AM91%(711 flights)
  • 12–3 PM—(1 flights)
  • 6–9 PM—(1 flights)
On-time by weekday
  • Mon88%(99 flights)
  • Tue97%(99 flights)
  • Wed86%(102 flights)
  • Thu91%(102 flights)
  • Fri96%(103 flights)
  • Sat83%(102 flights)
  • Sun93%(106 flights)
On-time trend by month
87%
May

Jun 95% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202595%58
July 202594%62
August 202594%62
September 202597%59
October 202597%61
November 202581%59
December 202592%62
January 202690%62
February 202695%55
March 202684%62
April 202682%50
May 202687%61

Airlines departing GUM

Busiest routes from GUM

Based on 730 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.