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Route Reliability

Denver → Philadelphia

DEN–PHL · 1,558 miles · Denver International Airport to Philadelphia International Airport

74
Usually Fine
WanderNerd Reliability Score
73%
Arrive within 15 minutes
13 min
Average arrival delay
1.2%
Cancelled
2,993
Flights in the data

Data through May 2026.

Who flies it best

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

  1. 1.United Airlines81%960 flights
  2. 2.American Airlines79%853 flights
  3. 3.Southwest Airlines64%878 flights
  4. 4.Frontier Airlines58%302 flights

What the data says

Morning flights do better here.

DEN–PHL flights departing between 6–9 AM arrived on time 86% of the time, versus 41% between 6–9 PM.

Monday is the weak spot.

DEN–PHL flights arrived on time 80% of the time on Tuesdays. On Mondays: 69%.

United Airlines has a clear lead on this route.

United Airlines arrived on time 81% of the time on this route; Frontier Airlines managed 58%.

Slipping a little lately.

DEN–PHL flights arrived on time 74% of the time over the last three months in the data, compared with 79% 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
  • Mon69%(439 flights)
  • Tue80%(386 flights)
  • Wed74%(407 flights)
  • Thu69%(441 flights)
  • Fri72%(456 flights)
  • Sat79%(379 flights)
  • Sun70%(442 flights)
On-time by departure window
  • 12–3 AM—(3 flights)
  • 6–9 AM86%(344 flights)
  • 9 AM–12 PM82%(816 flights)
  • 12–3 PM73%(666 flights)
  • 3–6 PM66%(555 flights)
  • 6–9 PM41%(218 flights)
  • 9 PM–12 AM71%(348 flights)
On-time trend by month
72%
May

Jun 61% → May 72% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202561%302
July 202564%306
August 202569%306
September 202578%282
October 202574%249
November 202585%238
December 202570%230
January 202684%169
February 202681%165
March 202668%203
April 202681%226
May 202672%274

Keep nerding

Based on 2,993 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.