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Flight Reliability

DL 5434 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 5434 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

70%
Arrive within 15 minutes
21 min
Average arrival delay
2.3%
Cancelled
4 min early
Median arrival delay

Based on 176 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon56%(25 flights)
  • Tue59%(27 flights)
  • Wed84%(25 flights)
  • Thu76%(25 flights)
  • Fri57%(23 flights)
  • Sat94%(18 flights)
  • Sun72%(29 flights)
On-time by departure window
  • 6–9 AM—(9 flights)
  • 9 AM–12 PM—(8 flights)
  • 12–3 PM79%(72 flights)
  • 3–6 PM57%(83 flights)
On-time trend by month
52%
May

Aug 100% → May 52% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
August 2025100%10
January 202682%28
February 2026100%11
March 202660%40
April 202666%38
May 202652%29
Departures on time
69%
Diverted
0%
Flights flown
172
Months covered
8

Keep nerding

Based on 176 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.