Flight Reliability
AA 4734 · American Airlines
New York → Pittsburgh (JFK–PIT)84% of its flights flew this route. The rest (MIA–LIT, PIT–ORD) are included in these numbers.
- 79%
- Arrive within 15 minutes
- 8 min
- Average arrival delay
- 1.6%
- Cancelled
- 11 min early
- Median arrival delay
Based on 250 historical flights. Data through May 2026.
What the data says
The 12–3 PM departure wins.
AA 4734 departing between 12–3 PM arrived on time 82% of the time, versus 62% between 9 PM–12 AM.
Saturdays have been rough.
AA 4734 arrived on time 87% of the time on Mondays and just 71% on Saturdays. That gap is worth planning around.
Slipping a little lately.
AA 4734 arrived on time 85% of the time over the last three months in the data, compared with 90% in the three months before that.
The breakdown
- Mon87%(31 flights)
- Tue81%(32 flights)
- Wed85%(33 flights)
- Thu73%(33 flights)
- Fri81%(32 flights)
- Sat71%(51 flights)
- Sun82%(33 flights)
- 12–3 PM82%(210 flights)
- 3–6 PM64%(14 flights)
- 9 PM–12 AM62%(21 flights)
Jun 55% → May 87% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 55% | 29 |
| July 2025 | 62% | 29 |
| August 2025 | 87% | 31 |
| September 2025 | 90% | 30 |
| October 2025 | 94% | 31 |
| December 2025 | 68% | 22 |
| April 2026 | 100% | 25 |
| May 2026 | 87% | 31 |
- Departures on time
- 81%
- Diverted
- 0.4%
- Flights flown
- 245
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 250 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.