Airport · GST · Gustavus, Alaska
Gustavus, AK
Gustavus, AK 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 1,064 flights (2020–2025); its biggest delay driver is late aircraft.
Data updated 2026-06-13
- 90.3%
- On-time
- Top 3%
- on-time, US airports
- 63 min
- Delay when late
- 1.97%
- Cancelled
Key Performance Metrics
Total Flights
1,064
Best Month
Sep 100%
Worst Month
Jul 94.1%
Delayed
103
Cancelled
21
GST on-time rate vs. the national average
Ahead of the U.S. average across all 382 tracked airports.
Where GST sits among all 382 tracked airports
GST's 90.3% 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 GST is marked in the 90-95% band.
Delay Cause Breakdown
Top delay cause: Late Aircraft. Total delay minutes: 3,267.
Seasonal Performance Patterns
Monthly averages across all years of data. Best month: September (100% on-time). Most delays: July (94.1% on-time).
| Month | Avg Flights | Avg Delayed | Avg Cancelled | On-Time % |
|---|---|---|---|---|
| September | 12 | 0 | 0 | 100% |
| August | 48 | 5 | 2 | 94.8% |
| July | 62 | 8 | 1 | 94.1% |
| June | 57 | 4 | 1 | 96.2% |
| May | 24 | 0 | 1 | 100% |
Year-Over-Year Performance
Annual flight volume and on-time trends at GST.
GST - on-time rate by year
2020–2025, year-over-year trend.
| Year | Flights | Delayed | Cancelled | On-Time % |
|---|---|---|---|---|
| 2025 | 172 | 13 | 3 | 92.4% |
| 2024 | 180 | 11 | 6 | 93.9% |
| 2023 | 150 | 7 | 0 | 95.3% |
| 2022 | 220 | 7 | 4 | 96.8% |
| 2021 | 178 | 7 | 2 | 96.1% |
| 2020 | 164 | 5 | 6 | 97% |
Cancellation & Diversion Analysis
Flight disruption statistics for Gustavus, AK.
Cancellation Rate
1.97%
21 of 1,064 flights
Diversion Rate
0.00%
0 of 1,064 flights
Delay Rate
9.7%
103 of 1,064 flights
Monthly Performance
Recent 24 months of flight data.
| Period | Flights | Dep Delayed | Arr Delayed | Cancelled | Diverted |
|---|---|---|---|---|---|
| Aug 2025 | 62 | 2 | 3 | 2 | 0 |
| Jul 2025 | 62 | 6 | 7 | 1 | 0 |
| Jun 2025 | 48 | 5 | 4 | 0 | 0 |
| Aug 2024 | 58 | 4 | 1 | 4 | 0 |
| Jul 2024 | 62 | 7 | 10 | 2 | 0 |
| Jun 2024 | 60 | 0 | 0 | 0 | 0 |
| Aug 2023 | 28 | 2 | 2 | 0 | 0 |
| Jul 2023 | 62 | 4 | 1 | 0 | 0 |
| Jun 2023 | 60 | 1 | 2 | 0 | 0 |
| Sep 2022 | 12 | 0 | 0 | 0 | 0 |
| Aug 2022 | 62 | 2 | 1 | 1 | 0 |
| Jul 2022 | 62 | 3 | 6 | 1 | 0 |
| Jun 2022 | 60 | 2 | 1 | 2 | 0 |
| May 2022 | 24 | 0 | 0 | 0 | 0 |
| Aug 2021 | 32 | 2 | 2 | 0 | 0 |
| Jul 2021 | 62 | 1 | 1 | 0 | 0 |
| Jun 2021 | 60 | 4 | 4 | 1 | 0 |
| May 2021 | 24 | 0 | 0 | 1 | 0 |
| Aug 2020 | 48 | 3 | 4 | 2 | 0 |
| Jul 2020 | 62 | 1 | 2 | 2 | 0 |
| Jun 2020 | 54 | 1 | 2 | 2 | 0 |
Airports With a Similar On-Time Rate
Other U.S. airports nationwide whose on-time rate is closest to Gustavus, AK's 90.3%.
Other Airports in Alaska
Compare performance with other Alaska airports.
Anchorage, AK
Anchorage · 214,443 flights
Juneau, AK
Juneau · 52,533 flights
Fairbanks, AK
Fairbanks · 44,233 flights
Ketchikan, AK
Ketchikan · 27,238 flights
Sitka, AK
Sitka · 14,900 flights
Kodiak, AK
Kodiak · 9,654 flights
Petersburg, AK
Petersburg · 8,696 flights
Wrangell, AK
Wrangell · 8,696 flights
Keep exploring
More flight data around Gustavus, AK.
Alaska flight data
Statewide on-time and delay aggregates, plus every reporting airport in Alaska.
View AK data →Airport rankings
See where GST sits among U.S. airports on on-time rate and average delay.
Best on-time airports →Compare airports
Put GST head-to-head with another airport on delays and reliability.
Open comparison tool →What the Data Says About GST
Gustavus, AK in Gustavus, Alaska handled 1,064 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 90.3% on-time departure rate. Of those flights, 103 experienced delays, 21 were cancelled, and 0 were diverted. The cancellation rate works out to 1.97%, the diversion rate to 0.00%, and the average delay when departures run late is 63.1 minutes. These figures are the baseline for comparing GST against other airports in the same state and nationally.
Breaking down what drives delays at GST, Late Aircraft leads the pack. Late Aircraft accounts for 63.5% of total delay minutes, followed by Carrier at 14.6% and NAS (National Aviation System) at 14.2%. Weather contributes 2.0% of delay minutes at this airport, while security holds the smallest share at 5.7%. Travelers often overestimate the weather share; the BTS categorization shows late-arriving aircraft and carrier operations as the larger contributors.
Seasonally, September runs the cleanest at GST with a 100% on-time rate, while July is the roughest at 94.1% - a 6-point swing between best and worst month. Volume peaks in July, when average flights hit 62. Combine these numbers - 90.3% on-time, 63.1-minute average delay, 1.97% cancellation rate, and you have a concrete picture of departure reliability at Gustavus, AK.
Frequently Asked Questions
What is the on-time performance rate at Gustavus, AK (GST)? ▼
What is the most common cause of delays at GST? ▼
What is the average delay time at GST? ▼
What is the best month to fly from GST? ▼
What is the worst month for delays at GST? ▼
How many routes operate from GST? ▼
What is the cancellation rate at GST? ▼
Flight Guides
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Using GST's data
An airport-level on-time rate is a starting point, not a guarantee for your specific flight.
- Compare GST against airports with a similar on-time rate. Compare airports
- Travel in September rather than July 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.