Johannesburg, South Africa → São Paulo, Brazil RTT

🇿🇦 Johannesburg, South Africa (JNB) → 🇧🇷 São Paulo, Brazil (GRU)

Measurement round: 2026-08-16T04:07:28Z.

In round 2026-08-16T04:07:28Z, 50 ICMP echo probes from Johannesburg, South Africa to São Paulo, Brazil produced an average RTT of 328.7 ms, with a minimum of 319.02 ms and a maximum of 366.86 ms. Packet loss was zero percent across the entire sample.

The straight-line distance between Johannesburg and São Paulo is only 7,441.9 km, giving a vacuum round-trip floor of 49.65 ms and a direct fiber floor of 72.88 ms. At 328.7 ms, the measured route is 4.51 times higher than that fiber floor and achieves just 22.2 percent fiber efficiency, indicating that the actual network path is substantially longer than the map distance suggests.

Among the 19 outbound routes in this measurement set, the Johannesburg–São Paulo leg ranks 15th by average RTT, placing it in the slower tail. Its standard deviation of 9.87 ms is only about 3.00 percent of the average, however, and jitter was 7.53 ms, so the path, while slow, is very consistent. The observed variability is below the 3.28 percent median seen across the network.

The practical takeaway is that 328.7 ms is not an anomaly from a few bad probes: the entire 50-sample range stays between 319.02 ms and 366.86 ms. This stable, high-latency band can be treated as the route's normal ICMP behavior for this measurement round.

Latency Summary

Ping Measurement Series

The chart below renders the 50-sample ICMP echo measurement round for this route; an accessible table of every sample is included with the chart.

Sample distribution: box = interquartile range (322.5–329.2 ms), median 325.9 ms · whiskers = min–max · diamond = round average · each dot is one measured sample.

How to read this chart

The shaded band spans the measured minimum to maximum RTT of all samples collected up to that point, and the thin line traces the running average. The final position therefore matches the round statistics exactly — the band only widens when a new extreme sample arrives.

The dashed line is the round average, and the shaded band at the bottom is the theoretical fiber-optic floor (72.9 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	325.74
2	100	324.93
3	200	330.82
4	300	326.06
5	400	338.45
6	500	328.98
7	600	326.05
8	700	320.88
9	800	321.39
10	900	323.95
11	1000	322.33
12	1100	325.96
13	1200	322.25
14	1300	327.27
15	1400	335.87
16	1500	326.93
17	1600	321.35
18	1700	319.03
19	1800	329.24
20	1900	328.64
21	2000	325.69
22	2100	327.76
23	2200	323.74
24	2300	319.93
25	2400	319.02
26	2500	361.94
27	2600	337.45
28	2700	366.86
29	2800	342.35
30	2900	326.53
31	3000	321.04
32	3100	350.37
33	3200	342.12
34	3300	339.51
35	3400	326.57
36	3500	324.62
37	3600	321.15
38	3700	325.91
39	3800	326.66
40	3900	322.92
41	4000	321.77
42	4100	337.52
43	4200	325.56
44	4300	324.34
45	4400	321.76
46	4500	320.24
47	4600	324.40
48	4700	327.88
49	4800	329.80
50	4900	323.47

Download This Route's Data

This route's measurement round is published as open data (CC BY 4.0) in CSV, JSON, and YAML. See About This Measurement for citation guidance.

Theoretical Fiber Latency

The public physical reference uses the GeoNames city centres for Johannesburg (-26.20227, 28.04363) and São Paulo (-23.54750, -46.63611). It does not disclose either facility address.

Attenuation is used to estimate the number of 80 km optical spans; it does not directly slow light. See the full theoretical fiber latency, GeoNames, attenuation, and amplifier methodology.

Stability & Trend

The current measurement round (2026-08-16T04:07:28Z) collected 50 ICMP echo samples on this route. Distribution statistics from that round:

Route Context

• Departure PoP: Johannesburg (JNB)
• Destination PoP: São Paulo (GRU)
• Region overview: Africa → South America
• Full global matrix: Backbone Latency Matrix
• Physical methodology: Theoretical Fiber Latency

Related City-Pair Routes

Reverse direction

• São Paulo to Johannesburg latency and RTT — 333.8 ms

Fastest routes departing Johannesburg (JNB)

• Johannesburg to London latency and RTT — 158 ms
• Johannesburg to Amsterdam latency and RTT — 163.2 ms
• Johannesburg to Paris latency and RTT — 164.4 ms
• Johannesburg to Frankfurt latency and RTT — 166 ms
• Johannesburg to Marseille latency and RTT — 172 ms

Fastest routes arriving at São Paulo (GRU)

• Ashburn to São Paulo latency and RTT — 101.4 ms
• New York to São Paulo latency and RTT — 106.9 ms
• Miami to São Paulo latency and RTT — 128.7 ms
• Los Angeles to São Paulo latency and RTT — 131.3 ms
• Seattle to São Paulo latency and RTT — 155.7 ms

About This Measurement

Published RTT reflects best-case backbone path behavior measured with ICMP echo probes between PoPs. End-user latency also depends on local access networks, congestion, routing policy, and traffic engineering. None of these values is an SLA.

The measurement round behind this page is published as open data under CC BY 4.0 in the Hats Network latency dataset. Per-pair files are available at /opendata/latency/latest/pairs/jnb-gru.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Johannesburg → São Paulo round 2026-08-16T04:07:28Z, CC BY 4.0".

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Data auto-generated on August 16, 2026. Explore the full interactive latency matrix or browse more city-pair routes.