Skip to content
WanderNerd
Check a flight

Flight Reliability

DL 1664 · Delta Air Lines

Charleston → Atlanta (CHS–ATL)96% of its flights flew this route. The rest (FLL–JFK) are included in these numbers.

89
Pretty Reliable
WanderNerd Reliability Score
91%
Arrive within 15 minutes
2 min early
Average arrival delay
2.5%
Cancelled
12 min early
Median arrival delay

Based on 325 historical flights. Data through May 2026.

What the data says

Sunday scaries are real for this one.

DL 1664 arrived on time 96% of the time on Thursdays and just 80% on Sundays. That gap is worth planning around.

Better than the Delta Air Lines network average.

DL 1664 arrived on time 91% of the time, versus 81% across the Delta Air Lines network.

Trending in the right direction.

DL 1664 arrived on time 95% of the time over the last three months in the data, compared with 81% in the three months before that.

The breakdown

On-time by weekday
  • Mon92%(47 flights)
  • Tue92%(47 flights)
  • Wed96%(44 flights)
  • Thu96%(45 flights)
  • Fri84%(45 flights)
  • Sat95%(43 flights)
  • Sun80%(46 flights)
On-time by departure window
  • 3–6 AM—(1 flights)
  • 6–9 AM93%(306 flights)
  • 9 AM–12 PM—(1 flights)
  • 6–9 PM—(9 flights)
On-time trend by month
100%
May

Jun 93% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%27
July 202590%31
August 202594%31
September 2025100%30
October 202590%31
November 202590%30
December 202569%26
January 202683%29
February 202696%28
April 202689%18
May 2026100%30
Departures on time
91%
Diverted
0%
Flights flown
317
Months covered
12

Same route, other flights

Keep nerding

Based on 325 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.