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Route Reliability

San Juan → Philadelphia

SJU–PHL · 1,576 miles · Luis Muñoz Marín International Airport to Philadelphia International Airport

59
A Little Dicey
WanderNerd Reliability Score
70%
Arrive within 15 minutes
18 min
Average arrival delay
3.4%
Cancelled
1,834
Flights in the data

Data through May 2026.

Who flies it best

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

  1. 1.American Airlines80%675 flights
  2. 2.Spirit Airlines71%246 flights
  3. 3.Frontier Airlines59%846 flights

Not enough history to rank: JetBlue Airways (67 flights). We rank airlines only after 100 flights on the route.

What the data says

Morning-you made the right choice.

SJU–PHL flights departing between 6–9 AM arrived on time 85% of the time, versus 44% between 9 PM–12 AM.

Sunday scaries are real for this one.

SJU–PHL flights arrived on time 77% of the time on Wednesdays. On Sundays: 64%.

American Airlines has a clear lead on this route.

American Airlines arrived on time 80% of the time on this route; Frontier Airlines managed 59%.

Keep a backup plan handy.

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

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
  • Mon64%(263 flights)
  • Tue69%(220 flights)
  • Wed77%(210 flights)
  • Thu73%(266 flights)
  • Fri70%(278 flights)
  • Sat72%(257 flights)
  • Sun64%(271 flights)
On-time by departure window
  • 12–3 AM53%(380 flights)
  • 3–6 AM81%(52 flights)
  • 6–9 AM85%(411 flights)
  • 9 AM–12 PM66%(174 flights)
  • 12–3 PM74%(464 flights)
  • 3–6 PM69%(131 flights)
  • 6–9 PM70%(81 flights)
  • 9 PM–12 AM44%(72 flights)
On-time trend by month
86%
May

Jun 70% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202570%130
July 202558%127
August 202564%126
September 202563%65
October 202577%93
November 202576%122
December 202557%158
January 202662%173
February 202670%165
March 202663%194
April 202681%217
May 202686%195

Keep nerding

Based on 1,834 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.