Antonio B. Won Pat International Airport (GUM): Delays & On-Time Performance
Data through May 2026
Antonio B. Won Pat International Airport (GUM) runs noticeably smoother than most US airports: 89% of its ~2 daily departures leave on time, 11 points above the national average, with an average departure delay of just 7 minutes. 1 airlines fly from Guam, TT to 2 destinations.
- Departures on-time
- 89%
- left <15 min late
- Avg dep delay
- 7 min
- Arrivals on-time
- 86%
- Cancelled
- 1.5%
- Destinations
- 2
- nonstop
- Airlines
- 1
Plan your departure from GUM
The choices most likely to improve your odds, based on this airport’s historical record.
- Best day to fly
- Tuesday
- 96% on-time
- Cancellation risk
- 1.5%
- close to the US average
Monthly on-time trend
Best time of day to depart from GUM
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 94% | 5 min |
| Tuesdaybest | 96% | 2 min |
| Wednesday | 85% | 10 min |
| Thursday | 92% | 9 min |
| Friday | 96% | 2 min |
| Saturday | 86% | 8 min |
| Sunday | 94% | 3 min |
Busiest routes from GUM
| Route | Flights/12mo | On-time | Avg delay |
|---|---|---|---|
| GUM → HNL (Honolulu) | 365 | 91% | 6 min |
| GUM → SPN (Saipan) | 365 | 93% | 6 min |
Where flights into GUM come from
| Route | Flights/12mo | On-time | Avg delay |
|---|---|---|---|
| HNL (Honolulu) → GUM | 365 | 83% | 10 min |
| SPN (Saipan) → GUM | 365 | 90% | 10 min |
What causes delays at GUM
Share of total delay minutes by cause, as reported by carriers to the US DOT, weighted across routes departing GUM.
- Late-arriving aircraft22%
- Airline operations64%
- National airspace system12%
- Weather2%
Frequently asked questions
- How often are flights delayed at GUM?
- 11% of departures from Antonio B. Won Pat International Airport left 15+ minutes late between 2024-06 and 2026-05, with an average departure delay of 7 minutes. The national on-time average over the same period was 78%.
- How often are flights cancelled at GUM?
- 1.5% of scheduled departures from GUM were cancelled in this period, compared with a national rate of 1.6%.
Popular route pages from this airport
Related guides
Based on 1,462 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.