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Flight Reliability

DL 3734 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3734 moved between routes during this period. Numbers below combine all of them, so treat them as background, not a verdict. For a cleaner answer, check the route you are actually flying.

Combined across all its routes

81%
Arrive within 15 minutes
4 min
Average arrival delay
1.8%
Cancelled
8 min early
Median arrival delay

Based on 449 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon79%(62 flights)
  • Tue78%(63 flights)
  • Wed80%(60 flights)
  • Thu86%(69 flights)
  • Fri75%(67 flights)
  • Sat96%(56 flights)
  • Sun75%(63 flights)
On-time by departure window
  • 6–9 AM84%(61 flights)
  • 9 AM–12 PM87%(146 flights)
  • 12–3 PM78%(135 flights)
  • 3–6 PM80%(78 flights)
  • 6–9 PM55%(20 flights)
On-time trend by month
58%
May

Sep 81% → May 58% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
September 202581%42
October 202594%62
November 202580%54
December 202570%56
January 202684%32
February 202689%45
March 202686%59
April 202683%40
May 202658%45
Departures on time
85%
Diverted
0.2%
Flights flown
440
Months covered
10

Keep nerding

Based on 449 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.