Antonio B. Won Pat International Airport (GUM) delays & on-time performance
Guam, U.S. Pacific Trust Territories and Possessions · 2 nonstop destinations · 1 airlines · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at GUM right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Figures cover 730 departures from GUM; on-time is measured at arrival. Arrivals into GUM were on time 84% of the time.
Key facts
- Flights departing Antonio B. Won Pat International Airport (GUM) arrived on time 89% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 2.7% were cancelled, and 3% arrived an hour or more late.
- Departures scheduled around 8am did best (90% on time); around 7am did worst (88%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (70%).
Most delayed routes from GUM
Lowest on-time arrival rates among regularly flown routes.
- HNL · Honolulu88%365 flts
- SPN · Saipan90%365 flts
Most reliable routes from GUM
Highest on-time arrival rates among regularly flown routes.
- SPN · Saipan90%365 flts
- HNL · Honolulu88%365 flts
Best airline at GUM
Departures from this airport, ranked by on-time arrival.
| Airline | On time | Cancelled | Avg delay | Routes | Flights |
|---|---|---|---|---|---|
| United Airlines | 89% | 2.7% | 8 min | 2 | 730 |
Best time to fly out of GUM
On-time arrival rate by scheduled departure hour (local time).
- 7am88%365 flts
- 8am90%363 flts
Monthly trend
Why departures were late
- Airline (crew, maintenance, cleaning, fueling)70%
- Late-arriving aircraft14%
- Air traffic control & airport congestion13%
- Extreme weather3%
- Security0%
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.