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Flight Reliability

F9 3512 · Frontier Airlines

Atlanta → Boston (ATL–BOS)

76
Usually Fine
WanderNerd Reliability Score
72%
Arrive within 15 minutes
10 min
Average arrival delay
1.0%
Cancelled
5 min early
Median arrival delay

Based on 200 historical flights. Data through May 2026.

What the data says

The 6–9 AM departure wins.

F9 3512 departing between 6–9 AM arrived on time 75% of the time, versus 62% between 9 AM–12 PM.

Tuesdays have been rough.

F9 3512 arrived on time 79% of the time on Fridays and just 60% on Tuesdays. That gap is worth planning around.

The breakdown

On-time by weekday
  • Mon64%(42 flights)
  • Tue60%(15 flights)
  • Wed69%(16 flights)
  • Thu73%(30 flights)
  • Fri79%(42 flights)
  • Sat78%(23 flights)
  • Sun73%(30 flights)
On-time by departure window
  • 3–6 AM72%(18 flights)
  • 6–9 AM75%(141 flights)
  • 9 AM–12 PM62%(37 flights)
  • 9 PM–12 AM—(2 flights)
On-time trend by month
84%
May

Jun 60% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202560%10
August 202577%13
September 202581%21
October 202584%19
November 202577%13
December 202557%21
March 202662%26
April 202680%30
May 202684%31
Departures on time
71%
Diverted
0%
Flights flown
198
Months covered
11

Same route, other flights

Keep nerding

Based on 200 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.