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Flight Reliability

B6 21 · JetBlue Airways

Boston → West Palm Beach (BOS–PBI)

63
A Little Dicey
WanderNerd Reliability Score
73%
Arrive within 15 minutes
13 min
Average arrival delay
3.2%
Cancelled
4 min early
Median arrival delay

Based on 251 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

B6 21 departing between 6–9 AM arrived on time 94% of the time, versus 44% between 12–3 PM.

Thursdays have been rough.

B6 21 arrived on time 84% of the time on Tuesdays and just 65% on Thursdays. That gap is worth planning around.

A bit ahead of the BOS–PBI route.

B6 21 arrived on time 73% of the time, versus 67% across the BOS–PBI route.

Keep a backup plan handy.

B6 21 was cancelled 3.2% of the time. Typical for U.S. flights is around 1–2%.

The breakdown

On-time by weekday
  • Mon67%(30 flights)
  • Tue84%(31 flights)
  • Wed79%(33 flights)
  • Thu65%(37 flights)
  • Fri81%(36 flights)
  • Sat68%(38 flights)
  • Sun67%(36 flights)
On-time by departure window
  • 6–9 AM94%(114 flights)
  • 9 AM–12 PM55%(38 flights)
  • 12–3 PM44%(23 flights)
  • 3–6 PM56%(66 flights)
On-time trend by month
100%
May

Jun 100% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%18
July 202574%27
August 202557%30
September 202587%30
October 202587%31
November 202573%26
December 202550%30
February 202629%17
May 2026100%20
Departures on time
76%
Diverted
0.8%
Flights flown
241
Months covered
12

Same route, other flights

Keep nerding

Based on 251 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.