ICMP RTT latency from Johannesburg, South Africa, to Sydney, Australia: average, minimum, maximum, jitter, packet loss, and route insights from August 2026.

🇿🇦 Johannesburg, South Africa (JNB) → 🇦🇺 Sydney, Australia (SYD)

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

During the 2026-08-16T04:07:28Z round, Johannesburg-to-Sydney ICMP echo RTT averaged 412.6 ms, with a 391.98 ms minimum and a 456.66 ms maximum across 50 samples. No packets were lost, so the 16.76 ms standard deviation and 13.13 ms jitter describe a path that is consistently slow rather than intermittently unstable.

Across the 19 routes captured in the same round, this path ranked 19th, meaning it carried the highest average latency of the set. Its variation is about 4.1 percent of its average, above the network's 3.28 percent median standard-deviation-to-average ratio, so it combines the slowest mean with somewhat more spread around that mean.

The geodesic distance of 11,060.7 km sets a vacuum RTT of 73.79 ms and an ideal fiber RTT of 108.32 ms. The measured 412.6 ms average is therefore 3.81 times the fiber floor, or a fiber efficiency of 26.3 percent, a concise way to express how far the observed round-trip time is from the theoretical minimum for that distance.

Latency Summary

Metric	Value
RTT	412.6 ms
Jitter	13.13 ms
Packet Loss	0%
Standard Fiber Floor	108.32 ms
Fiber Efficiency	26.3%
Latency Tier	High
Source Region	Africa
Destination Region	Asia Pacific

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.

Ping series: JNB → SYD

50 ICMP echo samples at 100 ms intervals · round 2026-08-16T04:07:28Z · avg 412.6 ± 2.37 ms (SE)

Sample distribution: box = interquartile range (400.5–421.9 ms), median 408.9 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 (108.3 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	427.02
2	100	445.31
3	200	428.48
4	300	409.12
5	400	414.28
6	500	440.08
7	600	422.83
8	700	401.66
9	800	393.58
10	900	392.46
11	1000	439.98
12	1100	408.78
13	1200	410.69
14	1300	410.71
15	1400	405.61
16	1500	419.10
17	1600	429.27
18	1700	417.61
19	1800	400.96
20	1900	398.85
21	2000	400.34
22	2100	415.45
23	2200	408.00
24	2300	396.17
25	2400	445.79
26	2500	412.88
27	2600	409.20
28	2700	404.26
29	2800	403.67
30	2900	404.40
31	3000	395.51
32	3100	405.74
33	3200	446.33
34	3300	445.48
35	3400	408.94
36	3500	401.50
37	3600	393.52
38	3700	395.89
39	3800	402.38
40	3900	410.29
41	4000	399.46
42	4100	396.93
43	4200	393.49
44	4300	394.01
45	4400	391.98
46	4500	408.95
47	4600	409.22
48	4700	429.15
49	4800	456.66
50	4900	428.03

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.

Download this dataset

Per-route ICMP ping series, released under CC BY 4.0. Uncompressed plain text — no decompression step needed.

CSV JSON YAML Full dataset

Theoretical Fiber Latency

The public physical reference uses the GeoNames city centres for Johannesburg (-26.20227, 28.04363) and Sydney (-33.86785, 151.20732). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	11,060.7 km
Vacuum RTT floor	73.79 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	108.32 ms
Low-latency fiber material floor	107.88 ms
Engineering floor (5% path allowance)	113.75 ms
Research 1.33× mapped-fiber reference	144.06 ms
Estimated unamplified path loss	2322.8 dB
Transparent optical spans / inline amplifiers	146 / 145
Published RTT inflation over fiber floor	3.81×

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:

Round Statistic	Value
Minimum RTT	391.98 ms
Average RTT	412.6 ms
Maximum RTT	456.66 ms
Standard deviation	16.76 ms
Stdev / average	4.1%

RTT trend

Estimated route stability across the selected time window.

Average: 412.6 ms
Minimum: 409.3 ms
Maximum: 415.8 ms
Average loss: 0.02%

Route Context

Departure PoP: Johannesburg (JNB)
Destination PoP: Sydney (SYD)
Region overview: Africa → Asia Pacific
Full global matrix: Backbone Latency Matrix
Physical methodology: Theoretical Fiber Latency

Reverse direction

Sydney to Johannesburg latency and RTT — 412.5 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 Sydney (SYD)

Melbourne to Sydney latency and RTT — 9.8 ms
Singapore to Sydney latency and RTT — 94.5 ms
Tokyo to Sydney latency and RTT — 101.9 ms
Taipei to Sydney latency and RTT — 133.2 ms
Hong Kong to Sydney latency and RTT — 137.2 ms

Same corridor (Africa → Asia Pacific)

Johannesburg to Singapore latency and RTT — 311.6 ms
Johannesburg to Hong Kong latency and RTT — 318 ms
Johannesburg to Taipei latency and RTT — 329.8 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-syd.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Johannesburg → Sydney round 2026-08-16T04:07:28Z, CC BY 4.0".

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

Johannesburg, South Africa → Sydney, Australia RTT