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Flight Reliability

DL 5310 · Delta Air Lines

Raleigh–Durham → Washington (RDU–DCA)

31
Bring Snacks
WanderNerd Reliability Score
47%
Arrive within 15 minutes
31 min
Average arrival delay
3.4%
Cancelled
17 min
Median arrival delay

Based on 354 historical flights. Data through May 2026.

What the data says

Friday is doing you no favors.

DL 5310 arrived on time 71% of the time on Saturdays and just 35% on Fridays. That gap is worth planning around.

Well behind the RDU–DCA route.

DL 5310 arrived on time 47% of the time, versus 63% across the RDU–DCA route.

Well behind the Delta Air Lines network.

DL 5310 arrived on time 47% of the time, versus 81% across the Delta Air Lines network.

Keep a backup plan handy.

DL 5310 was cancelled 3.4% of the time. Typical for U.S. flights is around 1–2%.

The breakdown

On-time by weekday
  • Mon44%(52 flights)
  • Tue46%(50 flights)
  • Wed44%(48 flights)
  • Thu38%(48 flights)
  • Fri35%(49 flights)
  • Sat71%(45 flights)
  • Sun52%(50 flights)
On-time by departure window
  • 9 AM–12 PM—(1 flights)
  • 12–3 PM49%(35 flights)
  • 3–6 PM46%(306 flights)
On-time trend by month
42%
May

Jun 31% → May 42% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202531%29
July 202548%25
August 202574%31
September 202583%29
October 202542%31
November 202531%26
December 202554%28
January 202641%29
February 202632%28
March 202637%30
April 202643%30
May 202642%26
Departures on time
67%
Diverted
0%
Flights flown
342
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.