Route Reliability
San Juan → Atlanta
SJU–ATL · 1,547 miles · Luis Muñoz Marín International Airport to Hartsfield–Jackson Atlanta International Airport
- 82%
- Arrive within 15 minutes
- 5 min
- Average arrival delay
- 1.4%
- Cancelled
- 2,153
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.Delta Air Lines91%1,645 flights
- 2.Frontier Airlines56%354 flights
- 3.Spirit Airlines48%154 flights
What the data says
The 6–9 AM departure wins.
SJU–ATL flights departing between 6–9 AM arrived on time 91% of the time, versus 69% between 9 AM–12 PM.
Monday is the weak spot.
SJU–ATL flights arrived on time 89% of the time on Wednesdays. On Mondays: 77%.
Delta Air Lines has a clear lead on this route.
Delta Air Lines arrived on time 91% of the time on this route; Spirit Airlines managed 48%.
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
- Mon77%(304 flights)
- Tue83%(265 flights)
- Wed89%(266 flights)
- Thu82%(311 flights)
- Fri86%(320 flights)
- Sat81%(319 flights)
- Sun78%(322 flights)
- 6–9 AM91%(614 flights)
- 9 AM–12 PM69%(16 flights)
- 12–3 PM84%(665 flights)
- 3–6 PM73%(676 flights)
- 6–9 PM81%(135 flights)
- 9 PM–12 AM—(1 flights)
Jun 81% → May 88% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 81% | 197 |
| July 2025 | 87% | 203 |
| August 2025 | 81% | 154 |
| September 2025 | 88% | 128 |
| October 2025 | 85% | 132 |
| November 2025 | 88% | 145 |
| December 2025 | 86% | 184 |
| January 2026 | 78% | 184 |
| February 2026 | 80% | 177 |
| March 2026 | 74% | 220 |
| April 2026 | 75% | 201 |
| May 2026 | 88% | 182 |
Keep nerding
Based on 2,153 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.