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Flight Reliability

DL 5198 · Delta Air Lines

Raleigh–Durham → Washington (RDU–DCA)90% of its flights flew this route. The rest (ATL–GNV, GNV–ATL) are included in these numbers.

10
Bring Snacks
WanderNerd Reliability Score
49%
Arrive within 15 minutes
32 min
Average arrival delay
8.8%
Cancelled
17 min
Median arrival delay

Based on 330 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

DL 5198 departing between 3–6 PM arrived on time 65% of the time, versus 47% between 6–9 PM.

Monday is the weak spot.

DL 5198 arrived on time 62% of the time on Saturdays. On Mondays: 47%.

Lagging the RDU–DCA route.

DL 5198 arrived on time 49% of the time, versus 63% across the RDU–DCA route.

Well behind the Delta Air Lines network.

DL 5198 arrived on time 49% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon47%(51 flights)
  • Tue48%(52 flights)
  • Wed49%(47 flights)
  • Thu48%(46 flights)
  • Fri48%(46 flights)
  • Sat62%(13 flights)
  • Sun51%(45 flights)
On-time by departure window
  • 12–3 PM—(6 flights)
  • 3–6 PM65%(20 flights)
  • 6–9 PM47%(274 flights)
On-time trend by month
57%
May

Jun 44% → May 57% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202544%18
July 202531%16
August 202554%24
September 202568%25
October 202521%24
November 202529%21
December 202554%41
January 202638%29
February 202667%24
March 202646%26
April 202667%24
May 202657%28
Departures on time
59%
Diverted
0.3%
Flights flown
300
Months covered
12

Same route, other flights

Keep nerding

Based on 330 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.