Explore São Paulo, Brazil to Johannesburg, South Africa ICMP RTT, jitter, packet loss and fiber latency limits on the AS203314 network.

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

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

São Paulo to Johannesburg averaged 333.8 ms, compared with a 72.88 ms city-centre fiber reference. The difference cannot be assigned to a particular cable or carrier from RTT alone.

Standard deviation was 10.62 ms, or 3.2% of the average. This describes variation within the sample without identifying its cause.

Latency Summary

Metric	Value
RTT	333.8 ms
Jitter	9.28 ms
Packet Loss	0%
Standard Fiber Floor	72.88 ms
Fiber Efficiency	21.8%
Latency Tier	High
Source Region	South America
Destination Region	Africa

Ping Measurement Series

50 ICMP echo probes were recorded in this round. Individual replies and their distribution are shown below.

Ping series: GRU → JNB

50 ICMP echo samples at 100 ms intervals · round 2026-08-16T04:07:28Z · avg 333.8 ± 1.50 ms (SE)

Sample distribution: box = interquartile range (325.7–338.3 ms), median 331.1 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	326.25
2	100	325.52
3	200	330.79
4	300	325.13
5	400	323.41
6	500	321.14
7	600	321.86
8	700	330.81
9	800	326.00
10	900	337.49
11	1000	340.94
12	1100	350.77
13	1200	344.56
14	1300	348.03
15	1400	332.22
16	1500	336.45
17	1600	326.08
18	1700	324.84
19	1800	339.61
20	1900	327.27
21	2000	325.66
22	2100	323.70
23	2200	331.83
24	2300	344.25
25	2400	331.58
26	2500	323.88
27	2600	332.65
28	2700	326.01
29	2800	360.80
30	2900	338.20
31	3000	326.73
32	3100	329.45
33	3200	338.34
34	3300	330.13
35	3400	337.29
36	3500	328.25
37	3600	330.39
38	3700	325.45
39	3800	322.70
40	3900	321.65
41	4000	346.07
42	4100	342.27
43	4200	341.83
44	4300	331.30
45	4400	369.06
46	4500	337.54
47	4600	334.46
48	4700	332.81
49	4800	325.61
50	4900	360.94

Download This Route's Data

Download the probe round as CSV, JSON or YAML under CC BY 4.0. Citation details include the route and round timestamp.

CSV JSON YAML Full dataset

Theoretical Fiber Latency

The propagation model uses public city-centre coordinates from GeoNames: São Paulo (-23.54750, -46.63611) and Johannesburg (-26.20227, 28.04363). These are not facility coordinates or a surveyed cable path.

Physical Reference	Value
WGS-84 geodesic distance	7,441.9 km
Vacuum RTT floor	49.65 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	72.88 ms
Low-latency fiber material floor	72.58 ms
Engineering floor (5% path allowance)	76.53 ms
Research 1.33× mapped-fiber reference	96.93 ms
Estimated unamplified path loss	1562.8 dB
Transparent optical spans / inline amplifiers	98 / 97
Published RTT inflation over fiber floor	4.58×

The span count assumes 80 km optical spans. Attenuation is a power-loss term, not a propagation delay. See the model assumptions and equations.

Stability & Trend

Statistics from the same 50 replies. They describe this probe round, not continuous historical monitoring.

Round Statistic	Value
Minimum RTT	321.14 ms
Average RTT	333.8 ms
Maximum RTT	369.06 ms
Standard deviation	10.62 ms
Stdev / average	3.2%

Estimated RTT trend

Modeled comparison, not historical probe measurements.

Average: 333.7 ms
Minimum: 331.7 ms
Maximum: 336.5 ms
Average loss: 0.04%

Route Context

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

Reverse direction

Johannesburg to São Paulo latency and RTT: 328.7 ms

Fastest routes departing São Paulo (GRU)

São Paulo to Miami latency and RTT: 74 ms
São Paulo to New York latency and RTT: 122 ms
São Paulo to Ashburn latency and RTT: 128 ms
São Paulo to Los Angeles latency and RTT: 130.8 ms
São Paulo to Seattle latency and RTT: 155.9 ms

Fastest routes arriving at Johannesburg (JNB)

Amsterdam to Johannesburg latency and RTT: 171.9 ms
Berlin to Johannesburg latency and RTT: 172.1 ms
London to Johannesburg latency and RTT: 179.6 ms
Paris to Johannesburg latency and RTT: 180.9 ms
Frankfurt to Johannesburg latency and RTT: 188.4 ms

About This Measurement

These ICMP measurements cover the two backbone endpoints. Access networks, routing policy and load can change an end user's result. A probe round is not an SLA.

The underlying replies are available under CC BY 4.0 in the Hats Network latency dataset. Per-pair files are available at /opendata/latency/latest/pairs/gru-jnb.pings.{csv,json,yaml}. Cite the route, round timestamp and dataset version. Example: "Hats Network latency dataset, São Paulo → Johannesburg round 2026-08-16T04:07:28Z, CC BY 4.0".

Round published August 16, 2026. See the full interactive latency matrix or browse more city-pair routes.

São Paulo, Brazil → Johannesburg, South Africa RTT