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Flight Reliability

B6 503 · JetBlue Airways

New York → San Juan (JFK–SJU)

60
A Little Dicey
WanderNerd Reliability Score
69%
Arrive within 15 minutes
22 min
Average arrival delay
2.5%
Cancelled
1 min early
Median arrival delay

Based on 358 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

B6 503 departing between 12–3 PM arrived on time 74% of the time, versus 57% between 3–6 PM.

Thursdays have been rough.

B6 503 arrived on time 76% of the time on Wednesdays and just 54% on Thursdays. That gap is worth planning around.

A bit behind the JetBlue Airways network.

B6 503 arrived on time 69% of the time, versus 73% across the JetBlue Airways network.

Trending in the right direction.

B6 503 arrived on time 78% of the time over the last three months in the data, compared with 70% in the three months before that.

The breakdown

On-time by weekday
  • Mon74%(50 flights)
  • Tue71%(49 flights)
  • Wed76%(49 flights)
  • Thu54%(52 flights)
  • Fri75%(52 flights)
  • Sat68%(47 flights)
  • Sun67%(49 flights)
On-time by departure window
  • 9 AM–12 PM65%(162 flights)
  • 12–3 PM74%(172 flights)
  • 3–6 PM57%(14 flights)
On-time trend by month
84%
May

Jun 73% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%30
July 202560%30
August 202533%30
September 202580%30
October 202576%29
November 202565%26
December 202563%30
January 202679%28
February 202668%25
March 202670%30
April 202679%29
May 202684%31
Departures on time
68%
Diverted
0.3%
Flights flown
348
Months covered
12

Same route, other flights

Keep nerding

Based on 358 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.