Johannesburg to Sydney ping and RTT: 411.6 ms, 18.03 ms jitter, 108.32 ms fiber floor, and 26.3% efficiency across AS203314. Updated 2026-08-10.

🇿🇦 This page compares the published ping and round-trip time (RTT) from Johannesburg (JNB) to 🇦🇺 Sydney (SYD) with vacuum and optical-fiber physical limits.

As of August 10, 2026, the Johannesburg → Sydney route on Hats Network averages 411.6 ms RTT across a 50-sample daily ICMP echo measurement round, 3.8× the theoretical fiber-floor limit of 108.32 ms.

Among the 19 measured routes departing Johannesburg, this route ranks 19th fastest by average RTT.

With a stdev-to-average ratio of 4.8%, this route fluctuates more than the network median of 3.1%, so short congestion windows can surface as transient RTT spikes. Across the round, per-probe RTT ranged from 385.72 ms to 469.09 ms with a standard deviation of 19.69 ms.

Latency Summary

Metric	Value
RTT	411.6 ms
Jitter	18.03 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 2026-08-10 · avg 411.6 ± 2.78 ms (SE)

Sample distribution: box = interquartile range (398.6–418.7 ms), median 406.8 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	385.72
2	100	389.74
3	200	387.29
4	300	386.83
5	400	469.09
6	500	416.30
7	600	408.08
8	700	458.34
9	800	419.85
10	900	422.74
11	1000	415.70
12	1100	413.78
13	1200	406.56
14	1300	430.85
15	1400	407.13
16	1500	418.85
17	1600	401.42
18	1700	398.44
19	1800	399.01
20	1900	398.46
21	2000	444.90
22	2100	410.08
23	2200	415.62
24	2300	401.63
25	2400	402.46
26	2500	420.13
27	2600	403.07
28	2700	418.33
29	2800	417.79
30	2900	402.68
31	3000	392.94
32	3100	464.87
33	3200	439.82
34	3300	428.56
35	3400	402.77
36	3500	392.98
37	3600	392.25
38	3700	408.63
39	3800	399.33
40	3900	422.76
41	4000	405.22
42	4100	397.23
43	4200	390.82
44	4300	389.90
45	4400	395.71
46	4500	416.35
47	4600	402.54
48	4700	451.85
49	4800	413.76
50	4900	400.84

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	3.8×

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 (2026-08-10) collected 50 ICMP echo samples on this route. Distribution statistics from that round:

Round Statistic	Value
Minimum RTT	385.72 ms
Average RTT	411.6 ms
Maximum RTT	469.09 ms
Standard deviation	19.69 ms
Stdev / average	4.8%

RTT trend

Estimated route stability across the selected time window.

Average: 411.8 ms
Minimum: 407.2 ms
Maximum: 416.0 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 — 411.3 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 — 9.7 ms
Singapore to Sydney latency and RTT — 94.5 ms
Tokyo to Sydney latency and RTT — 101.8 ms
Taipei to Sydney latency and RTT — 131.5 ms
Los Angeles to Sydney latency and RTT — 136 ms

Same corridor (Africa → Asia Pacific)

Johannesburg to Singapore latency and RTT — 309.5 ms
Johannesburg to Hong Kong latency and RTT — 318.4 ms
Johannesburg to Taipei latency and RTT — 333 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 date, and the dataset version — for example: "Hats Network latency dataset, Johannesburg → Sydney round 2026-08-10, CC BY 4.0".

Data auto-generated on August 10, 2026. Explore the full interactive latency matrix or browse more city-pair routes.

Johannesburg to Sydney Latency, Ping & RTT | AS203314