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Route Reliability

Greenville → Denver

GSP–DEN · 1,278 miles · Greenville–Spartanburg International Airport to Denver International Airport

74
Usually Fine
WanderNerd Reliability Score
80%
Arrive within 15 minutes
4 min
Average arrival delay
1.0%
Cancelled
383
Flights in the data

Data through May 2026.

Airlines on this route

  • United Airlines81% on time · 365 flights
  • Southwest Airlines47% 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.

GSP–DEN flights arrived on time 85% of the time on Saturdays and just 67% on Sundays. That gap is worth planning around.

Flights on this route

The breakdown

On-time by weekday
  • Mon80%(51 flights)
  • Tue83%(52 flights)
  • Wed83%(52 flights)
  • Thu78%(50 flights)
  • Fri82%(49 flights)
  • Sat85%(59 flights)
  • Sun67%(57 flights)
On-time by departure window
  • 6–9 AM—(1 flights)
  • 12–3 PM—(8 flights)
  • 3–6 PM79%(361 flights)
On-time trend by month
81%
May

Jun 62% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202562%37
July 202557%35
August 202565%31
September 202580%30
October 202590%31
November 2025100%30
December 202583%30
January 202682%28
February 202686%28
March 202686%29
April 202690%30
May 202681%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.