Route Reliability
Atlanta → San Juan
ATL–SJU · 1,547 miles · Hartsfield–Jackson Atlanta International Airport to Luis Muñoz Marín International Airport
- 70%
- Arrive within 15 minutes
- 16 min
- Average arrival delay
- 1.3%
- Cancelled
- 2,158
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.Delta Air Lines75%1,645 flights
- 2.Frontier Airlines53%358 flights
- 3.Spirit Airlines53%155 flights
What the data says
Morning flights do better here.
ATL–SJU flights departing between 6–9 AM arrived on time 87% of the time, versus 56% between 9 PM–12 AM.
Saturdays have been rough.
ATL–SJU flights arrived on time 81% of the time on Wednesdays and just 63% on Saturdays. That gap is worth planning around.
Delta Air Lines has a clear lead on this route.
Delta Air Lines arrived on time 75% of the time on this route; Spirit Airlines managed 53%.
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
- Mon67%(303 flights)
- Tue73%(265 flights)
- Wed81%(269 flights)
- Thu71%(317 flights)
- Fri74%(324 flights)
- Sat63%(327 flights)
- Sun65%(320 flights)
- 6–9 AM87%(402 flights)
- 9 AM–12 PM65%(685 flights)
- 12–3 PM81%(387 flights)
- 3–6 PM59%(257 flights)
- 6–9 PM61%(378 flights)
- 9 PM–12 AM56%(16 flights)
Jun 67% → May 77% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 67% | 200 |
| July 2025 | 70% | 207 |
| August 2025 | 71% | 154 |
| September 2025 | 76% | 128 |
| October 2025 | 77% | 132 |
| November 2025 | 77% | 145 |
| December 2025 | 69% | 188 |
| January 2026 | 69% | 183 |
| February 2026 | 70% | 179 |
| March 2026 | 63% | 223 |
| April 2026 | 64% | 201 |
| May 2026 | 77% | 185 |
Keep nerding
Based on 2,158 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.