Flight Reliability
DL 5733 · Delta Air Lines
New York → Boston (JFK–BOS)
90
Nerd Approved
WanderNerd Reliability Score
- 88%
- Arrive within 15 minutes
- 2 min early
- Average arrival delay
- 1.6%
- Cancelled
- 11 min early
- Median arrival delay
Based on 364 historical flights. Data through May 2026.
What the data says
Mondays have been rough.
DL 5733 arrived on time 94% of the time on Wednesdays and just 76% on Mondays. That gap is worth planning around.
Better than the JFK–BOS route average.
DL 5733 arrived on time 88% of the time, versus 74% across the JFK–BOS route.
A bit ahead of the Delta Air Lines network.
DL 5733 arrived on time 88% of the time, versus 81% across the Delta Air Lines network.
Trending in the right direction.
DL 5733 arrived on time 90% of the time over the last three months in the data, compared with 81% in the three months before that.
The breakdown
- Mon76%(50 flights)
- Tue88%(51 flights)
- Wed94%(52 flights)
- Thu92%(51 flights)
- Fri94%(52 flights)
- Sat79%(52 flights)
- Sun92%(50 flights)
100%
May
Jun 87% → May 100% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 87% | 30 |
| July 2025 | 97% | 31 |
| August 2025 | 100% | 31 |
| September 2025 | 83% | 30 |
| October 2025 | 90% | 31 |
| November 2025 | 83% | 29 |
| December 2025 | 87% | 30 |
| January 2026 | 86% | 28 |
| February 2026 | 69% | 26 |
| March 2026 | 81% | 31 |
| April 2026 | 90% | 30 |
| May 2026 | 100% | 31 |
- Departures on time
- 90%
- Diverted
- 0%
- Flights flown
- 358
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 364 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.