Skip to content
WanderNerd
Check a flight

Flight Reliability

DL 434 · Delta Air Lines

Atlanta → New York (ATL–LGA)98% of its flights flew this route. The rest (ORD–LGA, CHS–DTW) are included in these numbers.

49
Bring Snacks
WanderNerd Reliability Score
61%
Arrive within 15 minutes
25 min
Average arrival delay
3.2%
Cancelled
4 min
Median arrival delay

Based on 349 historical flights. Data through May 2026.

What the data says

Sunday scaries are real for this one.

DL 434 arrived on time 86% of the time on Saturdays and just 44% on Sundays. That gap is worth planning around.

Lagging the ATL–LGA route.

DL 434 arrived on time 61% of the time, versus 73% across the ATL–LGA route.

Well behind the Delta Air Lines network.

DL 434 arrived on time 61% of the time, versus 81% across the Delta Air Lines network.

Keep a backup plan handy.

DL 434 was cancelled 3.2% of the time. Typical for U.S. flights is around 1–2%.

The breakdown

On-time by weekday
  • Mon55%(51 flights)
  • Tue63%(51 flights)
  • Wed71%(51 flights)
  • Thu48%(50 flights)
  • Fri68%(50 flights)
  • Sat86%(35 flights)
  • Sun44%(50 flights)
On-time by departure window
  • 6–9 AM—(1 flights)
  • 9 AM–12 PM—(1 flights)
  • 3–6 PM—(5 flights)
  • 6–9 PM61%(331 flights)
On-time trend by month
60%
May

Jun 43% → May 60% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202543%28
July 202536%28
August 202570%30
September 202577%30
October 202558%31
November 202564%28
December 202552%29
January 202680%30
February 202674%23
March 202654%26
April 202664%25
May 202660%30
Departures on time
61%
Diverted
0%
Flights flown
338
Months covered
12

Same route, other flights

Keep nerding

Based on 349 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.