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Route Reliability

Raleigh–Durham → Philadelphia

RDU–PHL · 337 miles · Raleigh–Durham International Airport to Philadelphia International Airport

66
Usually Fine
WanderNerd Reliability Score
74%
Arrive within 15 minutes
17 min
Average arrival delay
2.9%
Cancelled
2,660
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.Frontier Airlines74%566 flights
  2. 2.American Airlines74%2,094 flights

What the data says

Morning flights do better here.

RDU–PHL flights departing between 6–9 AM arrived on time 85% of the time, versus 60% between 6–9 PM.

Thursday is the weak spot.

RDU–PHL flights arrived on time 81% of the time on Tuesdays. On Thursdays: 70%.

Not much between Frontier Airlines and American Airlines.

On this route they all land within 74% to 74% on time. Pick on schedule and price.

Ticking up lately.

RDU–PHL flights arrived on time 81% of the time over the last three months in the data, compared with 74% in the three months before that.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon72%(400 flights)
  • Tue81%(343 flights)
  • Wed73%(349 flights)
  • Thu70%(383 flights)
  • Fri75%(409 flights)
  • Sat77%(297 flights)
  • Sun71%(396 flights)
On-time by departure window
  • 3–6 AM—(1 flights)
  • 6–9 AM85%(696 flights)
  • 9 AM–12 PM81%(508 flights)
  • 12–3 PM75%(354 flights)
  • 3–6 PM63%(542 flights)
  • 6–9 PM60%(420 flights)
  • 9 PM–12 AM75%(56 flights)
On-time trend by month
83%
May

Jun 67% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202567%238
July 202562%231
August 202566%238
September 202580%229
October 202574%245
November 202572%193
December 202565%190
January 202676%180
February 202682%166
March 202676%191
April 202684%234
May 202683%242

Keep nerding

Based on 2,660 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.