DEN to GSP flight delays & on-time performance
Nonstop flights from Denver International Airport to Greenville-Spartanburg International Airport · 1,278 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at DEN or GSP right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Denver (DEN) to Greer (GSP) arrived on time 86% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 1.1% were cancelled, and 3% arrived an hour or more late.
- SkyWest Airlines was the most punctual airline here (88% on time); United Airlines was the least (85%).
- Departures scheduled around 9am did best (88% on time); around 10am did worst (86%).
- Wednesday was the most reliable day to fly (92% on time) and Saturday the least (80%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (48%).
Which airline is most on time from DEN to GSP?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Southwest Airlines | 100% | 0.0% | 2 min | 0.0% | 2 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 88% | 2.8% | 6 min | 2.2% | 142 |
| United Airlines | 85% | 0.0% | 9 min | 3.2% | 222 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 9am88%80 flights
- 10am86%286 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday88%0.0% cancelled
- Tuesday90%0.0% cancelled
- Wednesday92%0.0% cancelled
- Thursday83%0.0% cancelled
- Friday85%1.9% cancelled
- Saturday80%1.9% cancelled
- Sunday84%3.8% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)48%
- Late-arriving aircraft34%
- Air traffic control & airport congestion17%
- Extreme weather0%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather100%
- Airline (crew, maintenance, cleaning, fueling)0%
- Air traffic control & airport congestion0%
- Security0%
DEN to GSP: common questions
- How often are DEN to GSP flights on time?
- 86% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Denver to Greer cancelled?
- 1.1% of scheduled flights were cancelled (4 of 366).
- How long are typical delays?
- Across all flights the average arrival delay was 8 min (early arrivals count as zero). Flights that were late arrived 46 min behind schedule on average, and 2.8% of flights were an hour or more late.
- How long is taxi time at DEN?
- Flights on this route spent 25 min taxiing from the gate to takeoff on average.
Related routes
Return trip: GSP to DEN — 81% on time
More flights from Denver
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: DEN → GSP, nonstop flights by US airlines that report to the DOT. How we calculate this.