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Route Reliability

Charlotte Amalie → San Juan

STT–SJU · 68 miles · Cyril E. King Airport to Luis Muñoz Marín International Airport

70
Usually Fine
WanderNerd Reliability Score
73%
Arrive within 15 minutes
16 min
Average arrival delay
2.0%
Cancelled
541
Flights in the data

Data through May 2026.

Airlines on this route

  • JetBlue Airways74% on time · 527 flights
  • Frontier Airlines36% 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

Departure time hasn't mattered much.

On-time rates stay between 72% and 74% across the day.

Mondays have been rough.

STT–SJU flights arrived on time 81% of the time on Tuesdays and just 62% on Mondays. That gap is worth planning around.

Trending in the right direction.

STT–SJU flights arrived on time 84% of the time over the last three months in the data, compared with 64% 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
  • Mon62%(76 flights)
  • Tue81%(64 flights)
  • Wed79%(62 flights)
  • Thu68%(71 flights)
  • Fri80%(79 flights)
  • Sat70%(109 flights)
  • Sun75%(69 flights)
On-time by departure window
  • 12–3 PM74%(289 flights)
  • 3–6 PM72%(241 flights)
On-time trend by month
94%
May

Jun 82% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202582%34
July 202565%43
August 202570%40
September 202568%22
October 202593%28
November 202566%41
December 202569%51
January 202660%62
February 202664%53
March 202671%62
April 202688%58
May 202694%36

Keep nerding

Based on 541 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.