Route Reliability
Denver → Greenville
DEN–GSP · 1,278 miles · Denver International Airport to Greenville–Spartanburg International Airport
90
Nerd Approved
WanderNerd Reliability Score
- 86%
- Arrive within 15 minutes
- 2 min
- Average arrival delay
- 1.0%
- Cancelled
- 383
- Flights in the data
Data through May 2026.
Airlines on this route
- United Airlines87% on time · 365 flights
- Southwest Airlines78% on time · 18 flights
Too little history on this route to call a winner. We rank airlines only after 100 flights each.
What the data says
Sunday scaries are real for this one.
DEN–GSP flights arrived on time 92% of the time on Tuesdays. On Sundays: 78%.
Trending in the right direction.
DEN–GSP flights arrived on time 92% of the time over the last three months in the data, compared with 85% in the three months before that.
Flights on this route
The breakdown
- Mon89%(52 flights)
- Tue92%(52 flights)
- Wed90%(52 flights)
- Thu89%(52 flights)
- Fri88%(51 flights)
- Sat80%(60 flights)
- Sun78%(60 flights)
94%
May
Jun 82% → May 94% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 82% | 38 |
| July 2025 | 77% | 39 |
| August 2025 | 79% | 33 |
| September 2025 | 90% | 30 |
| October 2025 | 87% | 31 |
| November 2025 | 93% | 30 |
| December 2025 | 90% | 31 |
| January 2026 | 83% | 29 |
| February 2026 | 82% | 28 |
| March 2026 | 83% | 29 |
| April 2026 | 100% | 30 |
| May 2026 | 94% | 31 |
Keep nerding
Based on 383 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.