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Flight Reliability

B6 1734 · JetBlue Airways

San Francisco → Boston (SFO–BOS)

72
Usually Fine
WanderNerd Reliability Score
75%
Arrive within 15 minutes
5 min
Average arrival delay
2.6%
Cancelled
9 min early
Median arrival delay

Based on 342 historical flights. Data through May 2026.

What the data says

The 6–9 AM departure wins.

B6 1734 departing between 6–9 AM arrived on time 85% of the time, versus 53% between 9 AM–12 PM.

Mondays have been rough.

B6 1734 arrived on time 92% of the time on Saturdays and just 60% on Mondays. That gap is worth planning around.

A bit behind the SFO–BOS route.

B6 1734 arrived on time 75% of the time, versus 79% across the SFO–BOS route.

Recent months have been rougher.

B6 1734 arrived on time 54% of the time over the last three months in the data, compared with 84% in the three months before that.

The breakdown

On-time by weekday
  • Mon60%(47 flights)
  • Tue77%(47 flights)
  • Wed83%(47 flights)
  • Thu60%(48 flights)
  • Fri75%(48 flights)
  • Sat92%(48 flights)
  • Sun77%(48 flights)
On-time by departure window
  • 6–9 AM85%(126 flights)
  • 9 AM–12 PM53%(62 flights)
  • 12–3 PM75%(145 flights)
On-time trend by month
36%
May

Jun 100% → May 36% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%30
July 202577%31
August 202594%31
September 202563%30
October 202548%31
November 202580%25
December 202584%31
January 202679%29
February 202688%25
March 202668%31
April 202657%28
May 202636%11
Departures on time
76%
Diverted
0%
Flights flown
333
Months covered
12

Same route, other flights

Keep nerding

Based on 342 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.