ICMP round-trip latency between Sydney, Australia and Melbourne, Australia: 50 samples, 9.8 ms average, 0% packet loss, and statistics for round 2026-08-15.

🇦🇺 Sydney, Australia (SYD) → 🇦🇺 Melbourne, Australia (MEL)

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

For measurement round 2026-08-15T04:03:13Z, ICMP echo probes from Sydney, Australia to Melbourne, Australia returned an average round-trip time of 9.8 ms, with a minimum of 9.31 ms and a maximum of 11.05 ms across 50 samples. Packet loss was 0%, and the 0.4 ms standard deviation with 0.31 ms jitter describes a very tight delay profile.

The route is ranked first among the 19 measured routes. Its 0.4 ms standard deviation is about 4.1% of the 9.8 ms average, slightly above the route set's median deviation of 3.08%, but the absolute spread remains under half a millisecond.

Across a geodesic distance of 713.8 km, the observed average is 1.4 times the fiber floor of 6.99 ms, equivalent to 71.3% fiber efficiency. The useful takeaway for this hop is that near-floor delay and zero packet loss leave little meaningful performance gap on the Sydney-Melbourne path.

Latency Summary

Metric	Value
RTT	9.8 ms
Jitter	0.31 ms
Packet Loss	0%
Standard Fiber Floor	6.99 ms
Fiber Efficiency	71.3%
Latency Tier	Ultra-Low
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 → MEL

50 ICMP echo samples at 100 ms intervals · round 2026-08-15T04:03:13Z · avg 9.8 ± 0.06 ms (SE)

Sample distribution: box = interquartile range (9.5–10.0 ms), median 9.7 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 (7.0 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	9.45
2	100	9.57
3	200	9.34
4	300	9.39
5	400	9.60
6	500	9.44
7	600	10.59
8	700	10.00
9	800	9.49
10	900	9.56
11	1000	9.45
12	1100	9.88
13	1200	10.56
14	1300	11.05
15	1400	10.76
16	1500	9.83
17	1600	10.16
18	1700	9.73
19	1800	10.01
20	1900	9.56
21	2000	9.56
22	2100	10.59
23	2200	10.11
24	2300	9.60
25	2400	9.44
26	2500	9.31
27	2600	10.05
28	2700	10.07
29	2800	9.83
30	2900	9.56
31	3000	9.79
32	3100	9.66
33	3200	9.37
34	3300	9.53
35	3400	9.40
36	3500	9.89
37	3600	9.95
38	3700	9.78
39	3800	9.64
40	3900	9.82
41	4000	9.66
42	4100	10.14
43	4200	10.32
44	4300	10.28
45	4400	9.61
46	4500	9.61
47	4600	9.44
48	4700	9.42
49	4800	9.70
50	4900	9.45

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 Melbourne (-37.81400, 144.96332). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	713.8 km
Vacuum RTT floor	4.76 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	6.99 ms
Low-latency fiber material floor	6.96 ms
Engineering floor (5% path allowance)	7.34 ms
Research 1.33× mapped-fiber reference	9.3 ms
Estimated unamplified path loss	149.9 dB
Transparent optical spans / inline amplifiers	10 / 9
Published RTT inflation over fiber floor	1.4×

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	9.31 ms
Average RTT	9.8 ms
Maximum RTT	11.05 ms
Standard deviation	0.4 ms
Stdev / average	4.1%

RTT trend

Estimated route stability across the selected time window.

Average: 9.8 ms
Minimum: 9.7 ms
Maximum: 9.9 ms
Average loss: 0.01%

Route Context

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

Reverse direction

Melbourne to Sydney latency and RTT — 9.8 ms

Fastest routes departing Sydney (SYD)

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 Hong Kong latency and RTT — 135.9 ms
Sydney to Los Angeles latency and RTT — 136.2 ms

Fastest routes arriving at Melbourne (MEL)

Singapore to Melbourne latency and RTT — 87.8 ms
Tokyo to Melbourne latency and RTT — 111.3 ms
Hong Kong to Melbourne latency and RTT — 137.4 ms
Taipei to Melbourne latency and RTT — 143.6 ms
Los Angeles to Melbourne latency and RTT — 145.4 ms

Same corridor (Asia Pacific → Asia Pacific)

Hong Kong to Taipei latency and RTT — 15.2 ms
Taipei to Hong Kong latency and RTT — 15.4 ms
Singapore to Hong Kong latency and RTT — 30.9 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-mel.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Sydney → Melbourne 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 → Melbourne, Australia RTT