ICMP echo RTT from Sydney, Australia to Hong Kong, Hong Kong: average 135.7 ms, 0% loss, good latency tier and stability insights for this Asia-Pacific route.

🇦🇺 Sydney, Australia (SYD) → 🇭🇰 Hong Kong (HKG)

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

In the 2026-08-16T04:07:28Z measurement round, ICMP echo RTT from Sydney, Australia, to Hong Kong averaged 135.7 ms over 50 samples, with a minimum of 124.18 ms, a maximum of 155.08 ms, and no packet loss. The measured latency tier was good.

For the 7,349.1 km great-circle separation, the average is 1.89 times the theoretical fiber floor, or 53% fiber efficiency. The result placed 5th out of 19 outbound paths measured from the Sydney gateway, putting the route in the faster portion of the group.

The standard deviation was 6.42 ms and jitter was 6.06 ms, about 4.7% of the average and slightly above the network's median variability of 3.3%. A 30.9 ms spread between fastest and slowest samples, with zero loss, gives a useful stability reference for this Asia-Pacific route.

Latency Summary

Metric	Value
RTT	135.7 ms
Jitter	6.06 ms
Packet Loss	0%
Standard Fiber Floor	71.97 ms
Fiber Efficiency	53%
Latency Tier	Good
Source Region	Asia Pacific
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: SYD → HKG

50 ICMP echo samples at 100 ms intervals · round 2026-08-16T04:07:28Z · avg 135.7 ± 0.91 ms (SE)

Sample distribution: box = interquartile range (130.3–138.6 ms), median 136.3 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 (72.0 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	124.18
2	100	155.08
3	200	141.58
4	300	138.20
5	400	134.81
6	500	135.65
7	600	129.12
8	700	131.46
9	800	126.67
10	900	124.79
11	1000	130.13
12	1100	134.74
13	1200	139.31
14	1300	129.21
15	1400	130.18
16	1500	133.47
17	1600	136.19
18	1700	128.13
19	1800	137.79
20	1900	138.95
21	2000	129.16
22	2100	138.60
23	2200	138.86
24	2300	136.41
25	2400	137.31
26	2500	132.55
27	2600	127.14
28	2700	138.16
29	2800	133.48
30	2900	128.85
31	3000	140.80
32	3100	145.39
33	3200	141.10
34	3300	136.26
35	3400	130.58
36	3500	132.50
37	3600	136.90
38	3700	138.46
39	3800	128.96
40	3900	136.61
41	4000	128.64
42	4100	138.48
43	4200	131.94
44	4300	149.84
45	4400	141.76
46	4500	136.78
47	4600	137.53
48	4700	137.33
49	4800	144.83
50	4900	150.15

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 Sydney (-33.86785, 151.20732) and Hong Kong (22.27832, 114.17469). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	7,349.1 km
Vacuum RTT floor	49.03 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	71.97 ms
Low-latency fiber material floor	71.68 ms
Engineering floor (5% path allowance)	75.58 ms
Research 1.33× mapped-fiber reference	95.72 ms
Estimated unamplified path loss	1543.3 dB
Transparent optical spans / inline amplifiers	97 / 96
Published RTT inflation over fiber floor	1.89×

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	124.18 ms
Average RTT	135.7 ms
Maximum RTT	155.08 ms
Standard deviation	6.42 ms
Stdev / average	4.7%

RTT trend

Estimated route stability across the selected time window.

Average: 135.6 ms
Minimum: 134.2 ms
Maximum: 136.9 ms
Average loss: 0.03%

Route Context

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

Reverse direction

Hong Kong to Sydney latency and RTT — 137.2 ms

Fastest routes departing Sydney (SYD)

Sydney to Melbourne latency and RTT — 9.8 ms
Sydney to Singapore latency and RTT — 94.5 ms
Sydney to Tokyo latency and RTT — 101.3 ms
Sydney to Taipei latency and RTT — 131.7 ms
Sydney to Los Angeles latency and RTT — 136.5 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 (Asia Pacific → Asia Pacific)

Melbourne to Sydney latency and RTT — 9.8 ms
Hong Kong to Taipei latency and RTT — 14.7 ms
Hong Kong to Singapore latency and RTT — 31.5 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/syd-hkg.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Sydney → 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.

Sydney, Australia → Hong Kong RTT