Route Reliability
New York → San Juan
JFK–SJU · 1,598 miles · John F. Kennedy International Airport to Luis Muñoz Marín International Airport
- 72%
- Arrive within 15 minutes
- 13 min
- Average arrival delay
- 2.6%
- Cancelled
- 3,711
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.Delta Air Lines80%1,104 flights
- 2.JetBlue Airways70%2,232 flights
- 3.Frontier Airlines56%375 flights
What the data says
The 3–6 AM departure wins.
JFK–SJU flights departing between 3–6 AM arrived on time 84% of the time, versus 63% between 9 AM–12 PM.
Thursday is the weak spot.
JFK–SJU flights arrived on time 76% of the time on Fridays. On Thursdays: 65%.
Delta Air Lines has a clear lead on this route.
Delta Air Lines arrived on time 80% of the time on this route; Frontier Airlines managed 56%.
Trending in the right direction.
JFK–SJU flights arrived on time 80% of the time over the last three months in the data, compared with 69% in the three months before that.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon74%(509 flights)
- Tue76%(503 flights)
- Wed73%(511 flights)
- Thu65%(529 flights)
- Fri76%(521 flights)
- Sat71%(507 flights)
- Sun68%(526 flights)
- 3–6 AM84%(196 flights)
- 6–9 AM78%(802 flights)
- 9 AM–12 PM63%(513 flights)
- 12–3 PM78%(726 flights)
- 3–6 PM66%(326 flights)
- 6–9 PM67%(714 flights)
- 9 PM–12 AM65%(329 flights)
Jun 74% → May 83% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 74% | 342 |
| July 2025 | 67% | 358 |
| August 2025 | 65% | 355 |
| September 2025 | 74% | 245 |
| October 2025 | 64% | 268 |
| November 2025 | 75% | 294 |
| December 2025 | 69% | 334 |
| January 2026 | 68% | 280 |
| February 2026 | 69% | 269 |
| March 2026 | 76% | 299 |
| April 2026 | 80% | 309 |
| May 2026 | 83% | 253 |
Same trip, other airports
Keep nerding
Based on 3,711 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.