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Flight Reliability

DL 5171 · Delta Air Lines

Greenville → New York (GSP–LGA)95% of its flights flew this route. The rest (LGA–SYR) are included in these numbers.

77
Usually Fine
WanderNerd Reliability Score
90%
Arrive within 15 minutes
0 min
Average arrival delay
5.1%
Cancelled
12 min early
Median arrival delay

Based on 354 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

DL 5171 departing between 6–9 AM arrived on time 90% of the time, versus 70% between 9 PM–12 AM.

Wednesday has been the better bet.

A small edge: 92% on time on Wednesdays against 86% on Sundays.

Better than the GSP–LGA route average.

DL 5171 arrived on time 90% of the time, versus 78% across the GSP–LGA route.

Better than the Delta Air Lines network average.

DL 5171 arrived on time 90% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon91%(44 flights)
  • Tue90%(48 flights)
  • Wed92%(51 flights)
  • Thu92%(49 flights)
  • Fri88%(49 flights)
  • Sat89%(52 flights)
  • Sun86%(43 flights)
On-time by departure window
  • 6–9 AM90%(322 flights)
  • 3–6 PM—(4 flights)
  • 9 PM–12 AM70%(10 flights)
On-time trend by month
93%
May

Jun 87% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%30
July 202582%28
August 202593%30
September 2025100%30
October 2025100%31
November 202590%29
December 202581%26
January 202684%25
February 202696%22
March 202680%25
April 202687%30
May 202693%30
Departures on time
89%
Diverted
0%
Flights flown
336
Months covered
12

Same route, other flights

Keep nerding

Based on 354 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.