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Flight Reliability

AA 166 · American Airlines

San Francisco → New York (SFO–JFK)

54
A Little Dicey
WanderNerd Reliability Score
71%
Arrive within 15 minutes
26 min
Average arrival delay
3.6%
Cancelled
4 min early
Median arrival delay

Based on 362 historical flights. Data through May 2026.

What the data says

3–6 PM has a slight edge.

Departures between 3–6 PM arrived on time 76% of the time, against 70% between 9 AM–12 PM.

Thursdays have been rough.

AA 166 arrived on time 82% of the time on Fridays and just 63% on Thursdays. That gap is worth planning around.

Lagging the SFO–JFK route.

AA 166 arrived on time 71% of the time, versus 81% across the SFO–JFK route.

A bit behind the American Airlines network.

AA 166 arrived on time 71% of the time, versus 77% across the American Airlines network.

The breakdown

On-time by weekday
  • Mon67%(48 flights)
  • Tue71%(52 flights)
  • Wed70%(50 flights)
  • Thu63%(49 flights)
  • Fri82%(49 flights)
  • Sat76%(49 flights)
  • Sun71%(49 flights)
On-time by departure window
  • 9 AM–12 PM70%(10 flights)
  • 12–3 PM70%(269 flights)
  • 3–6 PM76%(67 flights)
On-time trend by month
53%
May

Jun 64% → May 53% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202564%28
July 202543%30
August 202583%30
September 202590%29
October 202584%31
November 202579%29
December 202574%27
January 202667%27
February 202669%26
March 202672%29
April 202677%30
May 202653%30
Departures on time
73%
Diverted
0.8%
Flights flown
346
Months covered
12

Same route, other flights

Keep nerding

Based on 362 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.