Airport · GUM · Guam, U.S. Pacific Trust Territories and Possessions
Guam, TT
Guam, TT posts top-5% on-time performance among the 382 tracked U.S. airports, as a smaller regional airport. According to the U.S. DOT Bureau of Transportation Statistics, drawn from 8,429 flights (2020–2025); its biggest delay driver is carrier.
Data updated 2026-06-13
- 90.6%
- On-time
- Top 2%
- on-time, US airports
- 75 min
- Delay when late
- 0.47%
- Cancelled
Key Performance Metrics
Total Flights
8,429
Best Month
Mar 97.3%
Worst Month
Jun 94.1%
Delayed
796
Cancelled
40
GUM on-time rate vs. the national average
Ahead of the U.S. average across all 382 tracked airports.
Where GUM sits among all 382 tracked airports
GUM's 90.6% on-time rate falls in the 90-95% band, the 12-airport band it shares.
National on-time-rate distribution
- 60-65% 1
1 airport between 60% and 65% on-time
1 airports
- 65-70% 4
4 airports between 65% and 70% on-time
4 airports
- 70-75% 9
9 airports between 70% and 75% on-time
9 airports
- 75-80% 48
48 airports between 75% and 80% on-time
48 airports
- 80-85%
192 airports between 80% and 85% on-time
192 airports
- 85-90%
116 airports between 85% and 90% on-time
116 airports
- 90-95% 12
12 airports between 90% and 95% on-time
12 airports
What this shows GUM is marked in the 90-95% band.
Delay Cause Breakdown
Top delay cause: Carrier. Total delay minutes: 23,421.
GUM - seasonal on-time pattern
Best: March (97.3%) · worst: June (94.1%)
Seasonal Performance Patterns
Monthly averages across all years of data. Best month: March (97.3% on-time). Most delays: June (94.1% on-time).
| Month | Avg Flights | Avg Delayed | Avg Cancelled | On-Time % |
|---|---|---|---|---|
| December | 118 | 10 | 0 | 96% |
| November | 114 | 9 | 1 | 95.8% |
| October | 120 | 9 | 0 | 96.9% |
| September | 116 | 9 | 1 | 96.7% |
| August | 123 | 13 | 0 | 95.4% |
| July | 120 | 17 | 0 | 94.8% |
| June | 114 | 12 | 0 | 94.1% |
| May | 117 | 9 | 3 | 96.3% |
| April | 107 | 9 | 0 | 95.3% |
| March | 123 | 14 | 1 | 97.3% |
| February | 112 | 9 | 0 | 96.9% |
| January | 122 | 13 | 0 | 95.1% |
Year-Over-Year Performance
Annual flight volume and on-time trends at GUM.
GUM - on-time rate by year
2020–2025, year-over-year trend.
| Year | Flights | Delayed | Cancelled | On-Time % |
|---|---|---|---|---|
| 2025 | 1,464 | 71 | 5 | 95.2% |
| 2024 | 1,464 | 60 | 6 | 95.9% |
| 2023 | 1,514 | 76 | 17 | 95% |
| 2022 | 1,504 | 58 | 1 | 96.1% |
| 2021 | 1,288 | 44 | 4 | 96.6% |
| 2020 | 1,195 | 37 | 7 | 96.9% |
Cancellation & Diversion Analysis
Flight disruption statistics for Guam, TT.
Cancellation Rate
0.47%
40 of 8,429 flights
Diversion Rate
0.02%
2 of 8,429 flights
Delay Rate
9.4%
796 of 8,429 flights
Monthly Performance
Recent 24 months of flight data.
| Period | Flights | Dep Delayed | Arr Delayed | Cancelled | Diverted |
|---|---|---|---|---|---|
| Dec 2025 | 124 | 13 | 6 | 0 | 0 |
| Nov 2025 | 120 | 11 | 3 | 1 | 0 |
| Oct 2025 | 124 | 4 | 2 | 1 | 0 |
| Sep 2025 | 120 | 2 | 5 | 0 | 1 |
| Aug 2025 | 124 | 4 | 11 | 0 | 0 |
| Jul 2025 | 124 | 4 | 8 | 0 | 0 |
| Jun 2025 | 120 | 2 | 2 | 2 | 0 |
| May 2025 | 124 | 4 | 2 | 0 | 0 |
| Apr 2025 | 120 | 1 | 3 | 0 | 0 |
| Mar 2025 | 128 | 5 | 16 | 1 | 0 |
| Feb 2025 | 112 | 10 | 6 | 0 | 0 |
| Jan 2025 | 124 | 11 | 7 | 0 | 0 |
| Dec 2024 | 124 | 3 | 3 | 0 | 0 |
| Nov 2024 | 120 | 3 | 7 | 1 | 0 |
| Oct 2024 | 124 | 3 | 10 | 0 | 0 |
| Sep 2024 | 120 | 5 | 6 | 4 | 0 |
| Aug 2024 | 124 | 8 | 7 | 0 | 0 |
| Jul 2024 | 124 | 7 | 15 | 0 | 0 |
| Jun 2024 | 120 | 12 | 9 | 0 | 0 |
| May 2024 | 124 | 6 | 6 | 1 | 0 |
| Apr 2024 | 120 | 7 | 2 | 0 | 0 |
| Mar 2024 | 124 | 1 | 7 | 0 | 0 |
| Feb 2024 | 116 | 2 | 8 | 0 | 0 |
| Jan 2024 | 124 | 3 | 6 | 0 | 0 |
Top Routes from GUM
Busiest routes to and from Guam, TT.
| Route | Flights | On-Time | Distance |
|---|---|---|---|
| GUM (Guam) → HNL (Honolulu) | 2,023 | 90.9% | 3,801 mi |
| HNL (Honolulu) → GUM (Guam) | 2,022 | 85.1% | 3,801 mi |
| GUM (Guam) → SPN (Saipan) | 1,676 | 95.5% | 129 mi |
| SPN (Saipan) → GUM (Guam) | 1,676 | 94.2% | 129 mi |
Airports With a Similar On-Time Rate
Other U.S. airports nationwide whose on-time rate is closest to Guam, TT's 90.6%.
Other Airports in U.S. Pacific Trust Territories and Possessions
Compare performance with other U.S. Pacific Trust Territories and Possessions airports.
Keep exploring
More flight data around Guam, TT.
U.S. Pacific Trust Territories and Possessions flight data
Statewide on-time and delay aggregates, plus every reporting airport in U.S. Pacific Trust Territories and Possessions.
View TT data →Airport rankings
See where GUM sits among U.S. airports on on-time rate and average delay.
Best on-time airports →Compare airports
Put GUM head-to-head with another airport on delays and reliability.
Open comparison tool →What the Data Says About GUM
Guam, TT in Guam, U.S. Pacific Trust Territories and Possessions handled 8,429 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 90.6% on-time departure rate. Of those flights, 796 experienced delays, 40 were cancelled, and 2 were diverted. The cancellation rate works out to 0.47%, the diversion rate to 0.02%, and the average delay when departures run late is 74.8 minutes. These figures are the baseline for comparing GUM against other airports in the same state and nationally.
Breaking down what drives delays at GUM, Carrier leads the pack. Carrier accounts for 59.9% of total delay minutes, followed by Late Aircraft at 29.9% and NAS (National Aviation System) at 10.0%. Weather contributes 0.2% of delay minutes at this airport, while security holds the smallest share at 0.0%. Travelers often overestimate the weather share; the BTS categorization shows late-arriving aircraft and carrier operations as the larger contributors.
Seasonally, March runs the cleanest at GUM with a 97.3% on-time rate, while June is the roughest at 94.1% - a 3-point swing between best and worst month. Volume peaks in August, when average flights hit 123. The busiest route connecting GUM is to HNL (Honolulu), with 2,023 flights at a 90.9% on-time rate. Combine these numbers - 90.6% on-time, 74.8-minute average delay, 0.47% cancellation rate, and you have a concrete picture of departure reliability at Guam, TT.
Frequently Asked Questions
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Flight Guides
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Using GUM's data
An airport-level on-time rate is a starting point, not a guarantee for your specific flight.
- Check the busiest route from GUM before you book a connection. See top routes
- Travel in March rather than June if your dates are flexible. Seasonal patterns
- Scores vary by airline and route within the same airport; check the specific carrier you're flying. Browse airlines
On-time rate reflects the BTS historical average across all reporting carriers at this airport, not any single flight or airline.
Related
Source: U.S. Bureau of Transportation Statistics (BTS) Airline on-time performance and operational reliability · 2025
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. Airport figures are computed directly from BTS On-Time Performance data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.