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Route · SJU → ATL · 2020–2025 BTS data

San Juan to Atlanta

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SJU to ATL (San Juan to Atlanta) ranks #1212 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

84.3%
On-time
+5.3 pts
vs US avg
84 min
Delay when late
9,651
Flights
#1212 of 4927
Corpus placement

Cancelled

0.8%

Best Month

Oct 2024 90%

Worst Month

May 2024 66%

Distance

1,547 mi

Carriers

9

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 192 27 7 1 DL,F9,NK
Nov 2025 148 18 2 1 DL,F9
Oct 2025 133 23 0 1 DL,F9
Sep 2025 128 17 0 0 DL,NK,F9
Aug 2025 156 32 1 1 F9,NK,DL
Jul 2025 207 27 2 2 NK,DL,F9
Jun 2025 202 37 2 3 DL,F9,NK
May 2025 200 30 1 0 DL,F9,NK
Apr 2025 200 25 0 3 DL,F9,NK
Mar 2025 220 33 1 1 DL,F9,NK
Feb 2025 157 20 0 0 DL,F9
Jan 2025 192 39 8 3 DL,F9,NK
Dec 2024 203 36 2 1 DL,F9,NK
Nov 2024 136 24 1 0 NK,DL
Oct 2024 127 13 0 0 DL,NK
Sep 2024 115 20 0 0 NK,DL
Aug 2024 162 24 2 2 DL,F9,NK
Jul 2024 204 68 4 3 DL,F9,NK
Jun 2024 196 47 0 2 DL,F9,NK
May 2024 200 68 1 3 DL,F9,NK
Apr 2024 175 28 1 0 DL,F9,NK
Mar 2024 207 35 0 0 DL,F9,NK
Feb 2024 178 35 0 0 DL,F9,NK
Jan 2024 211 49 1 0 DL,F9,NK

SJU–ATL seasonal on-time pattern

Best: November (89.2%) · weakest: June (79.3%)

75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 84.6%

Strongest calendar month

November

89.2% on-time · ~125 flights/mo

Busiest calendar month

May

~165 flights/mo avg

Weakest calendar month

June

79.3% on-time · ~161 flights/mo

Cancellation Rate

0.8%

36 of 4,249 flights

Diversion Rate

0.6%

27 of 4,249 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

SJU - San Juan

Full on-time, delay-cause, and seasonal performance for San Juan, PR.

SJU on-time profile

ATL - Atlanta

Full on-time, delay-cause, and seasonal performance for Atlanta, GA.

ATL on-time profile

Compare the two airports

See SJU and ATL side by side on delays, cancellations, and reliability.

Compare SJU vs ATL

Origin-hub reliability standing

Mid-pack among SJU departures

From SJU, this corridor sits with 14 other 75–85% on-time routes out of 21 tracked departures, not the hub's reliability leaders (1 at ≥85%) and not the softest ( 6 below 75%). Destination: Atlanta · fleet on-time rank #1488 of 4927.

What the Data Says About SJU to ATL

Bureau of Transportation Statistics records show San Juan to Atlanta (SJU to ATL) running a 84.3% on-time rate over 9,651 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 83.7 minutes. The 1,547-mile corridor is served by 9 carriers, and over the last 24 months 0.8% of 4,249 flights were cancelled, 0.6% diverted.

The monthly split is wide on this route: Oct 2024 posted the strongest performance at 90% on-time, while May 2024 came in at just 66% - a 24-point swing worth factoring into travel timing.

On the multi-year calendar, SJU–ATL peaks in November at 89.2% on-time while May carries the heaviest traffic (~165 flights per month) ; the softest month is June at 79.3%, a 9.9-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SJU to ATL rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SJU to ATL ranks #1212 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from SJU to ATL? ▼
Flights from San Juan to Atlanta have a 84.3% on-time rate based on 9,651 flights. The average delay is 83.7 minutes. The best recent month was Oct 2024 with 90% on-time.
What is the cancellation rate for SJU to ATL? ▼
Over the last 24 months, 0.8% of flights on this route were cancelled (36 of 4,249 flights) and 0.6% were diverted.
How far is the flight from SJU to ATL? ▼
The flight distance from San Juan (SJU) to Atlanta (ATL) is approximately 1,547 miles. This route is served by 9 carriers.
When is the best time to fly from SJU to ATL? ▼
The best recent month for on-time performance was Oct 2024 (90% on-time). The worst was May 2024 (66% on-time). Consider booking during months with historically better performance.

Airports on this route

SJU Airport

San Juan
ATL Airport

Atlanta
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using SJU–ATL data

SJU–ATL runs 5.3 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare SJU and ATL airport profiles: delay causes and top routes differ even on the same corridor. SJU airport
  • If your dates flex, November (89.2% on-time) beats June (79.3%) on this corridor. Seasonal chart
  • 4 other routes post a similar 84.3% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.