ICMP echo RTT data from Sydney, Australia to Hong Kong, Hong Kong: 135.9 ms average, jitter, packet loss, and route analysis.

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

Measurement round: 2026-08-15T04:03:13Z.

In round 2026-08-15T04:03:13Z, ICMP echo RTT from Sydney, Australia to Hong Kong averaged 135.9 ms over 50 samples, with a 129.61 ms minimum, a 156.11 ms maximum, and no packet loss. The 7,349.1 km great-circle separation has a theoretical vacuum floor of 49.03 ms and a fiber-optic floor of 71.97 ms, so the measured mean is 1.89 times the fiber floor, equivalent to 53% fiber efficiency.

The route showed a standard deviation of 5.47 ms and jitter of 4.99 ms, keeping the round-trip times within a 26.5 ms band. Its variability is slightly above the 3.08% median standard-deviation-to-average ratio across the 19 routes measured from Sydney in this round, and the latency tier was Good.

Ranked 5th of those 19 routes, Sydney-to-Hong Kong is one of the more responsive paths from Sydney in this measurement set. The 129.61–156.11 ms range is consistent with the separation between two Asia-Pacific hubs, and the low jitter points to a stable ICMP echo profile for this route.

Latency Summary

Metric	Value
RTT	135.9 ms
Jitter	4.99 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 2026-08-15T04:03:13Z · avg 135.9 ± 0.77 ms (SE)

Sample distribution: box = interquartile range (131.9–137.8 ms), median 134.9 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 (72.0 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	130.06
2	100	136.69
3	200	132.14
4	300	130.27
5	400	134.91
6	500	131.39
7	600	138.03
8	700	137.09
9	800	142.99
10	900	136.95
11	1000	134.20
12	1100	139.43
13	1200	136.14
14	1300	131.91
15	1400	130.32
16	1500	131.62
17	1600	130.89
18	1700	130.40
19	1800	129.61
20	1900	136.80
21	2000	136.40
22	2100	136.16
23	2200	134.29
24	2300	130.94
25	2400	138.65
26	2500	143.81
27	2600	134.27
28	2700	142.93
29	2800	135.09
30	2900	131.64
31	3000	153.24
32	3100	138.85
33	3200	141.74
34	3300	134.81
35	3400	131.51
36	3500	132.51
37	3600	136.90
38	3700	135.02
39	3800	156.11
40	3900	138.66
41	4000	133.72
42	4100	142.34
43	4200	144.32
44	4300	134.91
45	4400	134.32
46	4500	132.07
47	4600	130.26
48	4700	132.23
49	4800	133.13
50	4900	132.33

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 (2026-08-15T04:03:13Z) collected 50 ICMP echo samples on this route. Distribution statistics from that round:

Round Statistic	Value
Minimum RTT	129.61 ms
Average RTT	135.9 ms
Maximum RTT	156.11 ms
Standard deviation	5.47 ms
Stdev / average	4.0%

RTT trend

Estimated route stability across the selected time window.

Average: 135.9 ms
Minimum: 134.4 ms
Maximum: 136.8 ms
Average loss: 0.02%

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 — 136.3 ms

Fastest routes departing Sydney (SYD)

Sydney to Melbourne latency and RTT — 9.8 ms
Sydney to Singapore latency and RTT — 94.7 ms
Sydney to Tokyo latency and RTT — 101.6 ms
Sydney to Taipei latency and RTT — 133.2 ms
Sydney to Los Angeles latency and RTT — 136.2 ms

Fastest routes arriving at Hong Kong (HKG)

Taipei to Hong Kong latency and RTT — 15.4 ms
Singapore to Hong Kong latency and RTT — 30.9 ms
Tokyo to Hong Kong latency and RTT — 45.6 ms
Moscow to Hong Kong latency and RTT — 118.5 ms
Seattle to Hong Kong latency and RTT — 130.7 ms

Same corridor (Asia Pacific → Asia Pacific)

Melbourne to Sydney latency and RTT — 9.8 ms
Hong Kong to Taipei latency and RTT — 15.2 ms
Hong Kong to Singapore latency and RTT — 31.2 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 2026-08-15T04:03:13Z, CC BY 4.0".

Data auto-generated on August 15, 2026. Explore the full interactive latency matrix or browse more city-pair routes.

Sydney, Australia → Hong Kong RTT