SJU to ATL flight delays & on-time performance
Nonstop flights from Luis Munoz Marin International Airport to Hartsfield Jackson Atlanta International Airport · 1,547 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SJU or ATL right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from San Juan (SJU) to Atlanta (ATL) arrived on time 81% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 1.4% were cancelled, and 6% arrived an hour or more late.
- Delta Air Lines was the most punctual airline here (91% on time); Frontier Airlines was the least (54%).
- Departures scheduled around 1pm did best (92% on time); around 4pm did worst (62%).
- Wednesday was the most reliable day to fly (89% on time) and Sunday the least (75%).
- The largest source of delay minutes was late-arriving aircraft (43%).
Which airline is most on time from SJU to ATL?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Delta Air Lines | 91% | 0.9% | 8 min | 2.6% | 1,627 |
| Frontier Airlines | 54% | 2.1% | 42 min | 19.0% | 375 |
| Spirit Airlines | 22% | 6.5% | 51 min | 25.3% | 93 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am91%209 flights
- 7am92%398 flights
- 12pm70%164 flights
- 1pm92%158 flights
- 2pm88%319 flights
- 3pm68%244 flights
- 4pm62%108 flights
- 5pm75%335 flights
- 6pm81%139 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday76%1.3% cancelled
- Tuesday82%0.8% cancelled
- Wednesday89%0.4% cancelled
- Thursday82%0.0% cancelled
- Friday85%0.0% cancelled
- Saturday82%4.8% cancelled
- Sunday75%1.9% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft43%
- Airline (crew, maintenance, cleaning, fueling)36%
- Air traffic control & airport congestion20%
- Extreme weather1%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)52%
- Extreme weather24%
- Security21%
- Air traffic control & airport congestion3%
SJU to ATL: common questions
- How often are SJU to ATL flights on time?
- 81% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from San Juan to Atlanta cancelled?
- 1.4% of scheduled flights were cancelled (29 of 2,095).
- How long are typical delays?
- Across all flights the average arrival delay was 16 min (early arrivals count as zero). Flights that were late arrived 81 min behind schedule on average, and 6.5% of flights were an hour or more late.
- How long is taxi time at SJU?
- Flights on this route spent 16 min taxiing from the gate to takeoff on average.
Related routes
Return trip: ATL to SJU — 71% on time
More flights from San Juan
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SJU → ATL, nonstop flights by US airlines that report to the DOT. How we calculate this.