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Route Reliability

Christiansted → San Juan

STX–SJU · 94 miles · Henry E. Rohlsen Airport to Luis Muñoz Marín International Airport

79
Usually Fine
WanderNerd Reliability Score
76%
Arrive within 15 minutes
8 min
Average arrival delay
0.9%
Cancelled
326
Flights in the data

Data through May 2026.

Airlines on this route

  • JetBlue Airways78% on time · 312 flights
  • Frontier Airlines29% on time · 14 flights

Too little history on this route to call a winner. We rank airlines only after 100 flights each.

What the data says

The 12–3 PM departure wins.

STX–SJU flights departing between 12–3 PM arrived on time 83% of the time, versus 72% between 3–6 PM.

Sunday scaries are real for this one.

STX–SJU flights arrived on time 86% of the time on Wednesdays and just 64% on Sundays. That gap is worth planning around.

Trending in the right direction.

STX–SJU flights arrived on time 80% of the time over the last three months in the data, compared with 72% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon77%(44 flights)
  • Tue80%(45 flights)
  • Wed86%(44 flights)
  • Thu75%(51 flights)
  • Fri82%(44 flights)
  • Sat68%(41 flights)
  • Sun64%(53 flights)
On-time by departure window
  • 12–3 PM83%(121 flights)
  • 3–6 PM72%(201 flights)
On-time trend by month
84%
May

Jun 87% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%30
July 202569%39
August 202574%35
November 202573%30
December 202568%31
January 202667%30
February 202682%27
March 202681%31
April 202677%30
May 202684%31

Keep nerding

Based on 326 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.