Route · GCC → DEN · 2020–2025 BTS data
Gillette to Denver
The GCC–DEN corridor (Gillette, WY → Denver, CO) runs ahead of the national average, served by 1 carrier across roughly 313 miles.
Data updated 2026-06-13
- 84.8%
- On-time
- +5.8 pts
- vs US avg
- 146 min
- Delay when late
- 3,914
- Flights
Cancelled
1.6%
Best Month
Sep 2024 93%
Worst Month
Apr 2025 65%
Distance
313 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 62 | 17 | 1 | 0 | OO |
| Nov 2025 | 60 | 5 | 0 | 0 | OO |
| Oct 2025 | 62 | 9 | 0 | 0 | OO |
| Sep 2025 | 60 | 5 | 0 | 0 | OO |
| Aug 2025 | 62 | 16 | 0 | 1 | OO |
| Jul 2025 | 62 | 12 | 0 | 0 | OO |
| Jun 2025 | 60 | 13 | 0 | 0 | OO |
| May 2025 | 62 | 21 | 0 | 1 | OO |
| Apr 2025 | 60 | 21 | 1 | 0 | OO |
| Mar 2025 | 62 | 8 | 0 | 0 | OO |
| Feb 2025 | 56 | 10 | 6 | 0 | OO |
| Jan 2025 | 62 | 19 | 6 | 0 | OO |
| Dec 2024 | 62 | 11 | 0 | 1 | OO |
| Nov 2024 | 59 | 13 | 1 | 0 | OO |
| Oct 2024 | 62 | 7 | 1 | 0 | OO |
| Sep 2024 | 60 | 4 | 0 | 1 | OO |
| Aug 2024 | 64 | 12 | 0 | 1 | OO |
| Jul 2024 | 62 | 7 | 0 | 0 | OO |
| Jun 2024 | 60 | 10 | 0 | 1 | OO |
| May 2024 | 62 | 5 | 0 | 0 | OO |
| Apr 2024 | 60 | 8 | 1 | 1 | OO |
| Mar 2024 | 62 | 5 | 2 | 0 | OO |
| Feb 2024 | 58 | 6 | 1 | 1 | OO |
| Jan 2024 | 61 | 12 | 3 | 0 | OO |
Cancellation Rate
1.6%
23 of 1,462 flights
Diversion Rate
0.5%
8 of 1,462 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
GCC - Gillette
Full on-time, delay-cause, and seasonal performance for Gillette, WY.
Origin airport →DEN - Denver
Full on-time, delay-cause, and seasonal performance for Denver, CO.
Destination airport →Compare the two airports
See GCC and DEN side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to GCC–DEN.
Routes with a similar on-time rate
What the Data Says About GCC to DEN
Bureau of Transportation Statistics records show Gillette to Denver (GCC to DEN) running a 84.8% on-time rate over 3,914 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 146.1 minutes. The 313-mile corridor is served by 1 carrier, and over the last 24 months 1.6% of 1,462 flights were cancelled, 0.5% diverted.
The monthly split is wide on this route: Sep 2024 posted the strongest performance at 93% on-time, while Apr 2025 came in at just 65% - a 28-point swing worth factoring into travel timing.
Frequently Asked Questions
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.