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Flight Reliability

F9 3576 · Frontier Airlines

San Juan → Newark (SJU–EWR)

61
A Little Dicey
WanderNerd Reliability Score
65%
Arrive within 15 minutes
17 min
Average arrival delay
2.1%
Cancelled
4 min
Median arrival delay

Based on 187 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

F9 3576 departing between 6–9 AM arrived on time 81% of the time, versus 60% between 3–6 PM.

Sunday scaries are real for this one.

F9 3576 arrived on time 74% of the time on Wednesdays and just 45% on Sundays. That gap is worth planning around.

Lagging the SJU–EWR route.

F9 3576 arrived on time 65% of the time, versus 75% across the SJU–EWR route.

Lagging the Frontier Airlines network.

F9 3576 arrived on time 65% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon60%(30 flights)
  • Tue67%(18 flights)
  • Wed74%(31 flights)
  • Thu65%(20 flights)
  • Fri69%(32 flights)
  • Sat69%(32 flights)
  • Sun45%(20 flights)
On-time by departure window
  • 6–9 AM81%(31 flights)
  • 3–6 PM60%(131 flights)
  • 6–9 PM71%(21 flights)
On-time trend by month
83%
Jan

Jun 44% → Jan 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202544%18
July 202555%31
August 202548%31
September 202580%30
October 202575%20
November 202565%17
December 202582%17
January 202683%12
Departures on time
74%
Diverted
0%
Flights flown
183
Months covered
9

Same route, other flights

Keep nerding

Based on 187 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.