ICMP RTT from Johannesburg, South Africa to Hong Kong, Hong Kong: average 318 ms, zero packet loss, stability and distance context for this route.

🇿🇦 Johannesburg, South Africa (JNB) → 🇭🇰 Hong Kong (HKG)

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

Measurement round 2026-08-16T04:07:28Z recorded 50 ICMP echo responses from Johannesburg, South Africa to Hong Kong, Hong Kong with an average round-trip time of 318.0 ms. The minimum was 302.56 ms, the maximum was 363.62 ms, and packet loss remained at zero percent.

The two cities are separated by 10,715.5 km along the great circle, which sets a vacuum floor of 71.49 ms and a direct fiber floor of 104.93 ms for a round trip. The observed 318 ms average is 3.03 times that fiber floor and corresponds to 33 percent fiber efficiency, so the route carries considerable overhead relative to the ideal straight-line path.

Within the same round's set of 19 outbound routes, this leg ranks 14th by average RTT, putting it in the slower half. Its standard deviation of 12.41 ms equals about 3.90 percent of the mean, above the 3.28 percent median variability across the network; jitter of 9.12 ms confirms that probe-to-probe timing varied more than the typical route in the set.

With no loss and a steady but elevated RTT envelope, the observed minimum of 302.56 ms provides a useful reference point for this corridor, while 318.0 ms remains the central baseline for Johannesburg-to-Hong Kong ICMP latency in this round.

Latency Summary

Metric	Value
RTT	318 ms
Jitter	9.12 ms
Packet Loss	0%
Standard Fiber Floor	104.93 ms
Fiber Efficiency	33%
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 → HKG

50 ICMP echo samples at 100 ms intervals · round 2026-08-16T04:07:28Z · avg 318.0 ± 1.76 ms (SE)

Sample distribution: box = interquartile range (309.9–323.2 ms), median 314.8 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 (104.9 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	344.82
2	100	329.78
3	200	317.34
4	300	323.24
5	400	316.12
6	500	305.95
7	600	306.85
8	700	307.63
9	800	319.06
10	900	310.56
11	1000	312.86
12	1100	338.63
13	1200	314.67
14	1300	313.36
15	1400	313.56
16	1500	307.42
17	1600	311.32
18	1700	314.23
19	1800	315.95
20	1900	305.72
21	2000	323.48
22	2100	329.22
23	2200	319.59
24	2300	315.36
25	2400	307.77
26	2500	305.67
27	2600	324.93
28	2700	318.20
29	2800	325.35
30	2900	309.95
31	3000	307.92
32	3100	309.87
33	3200	316.04
34	3300	308.93
35	3400	314.57
36	3500	310.27
37	3600	313.46
38	3700	304.90
39	3800	302.56
40	3900	324.47
41	4000	315.16
42	4100	320.45
43	4200	323.02
44	4300	363.62
45	4400	357.10
46	4500	336.62
47	4600	314.90
48	4700	312.79
49	4800	325.36
50	4900	309.40

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 Hong Kong (22.27832, 114.17469). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	10,715.5 km
Vacuum RTT floor	71.49 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	104.93 ms
Low-latency fiber material floor	104.51 ms
Engineering floor (5% path allowance)	110.2 ms
Research 1.33× mapped-fiber reference	139.56 ms
Estimated unamplified path loss	2250.3 dB
Transparent optical spans / inline amplifiers	141 / 140
Published RTT inflation over fiber floor	3.03×

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	302.56 ms
Average RTT	318 ms
Maximum RTT	363.62 ms
Standard deviation	12.41 ms
Stdev / average	3.9%

RTT trend

Estimated route stability across the selected time window.

Average: 318.1 ms
Minimum: 315.1 ms
Maximum: 321.4 ms
Average loss: 0.02%

Route Context

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

Reverse direction

Hong Kong to Johannesburg latency and RTT — 316.7 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 Hong Kong (HKG)

Taipei to Hong Kong latency and RTT — 15.5 ms
Singapore to Hong Kong latency and RTT — 30.8 ms
Tokyo to Hong Kong latency and RTT — 44.8 ms
Moscow to Hong Kong latency and RTT — 118.6 ms
Seattle to Hong Kong latency and RTT — 130.4 ms

Same corridor (Africa → Asia Pacific)

Johannesburg to Singapore latency and RTT — 311.6 ms
Johannesburg to Taipei latency and RTT — 329.8 ms
Johannesburg to Tokyo latency and RTT — 360.5 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-hkg.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Johannesburg → Hong Kong 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 → Hong Kong RTT