Explore São Paulo, Brazil to Melbourne, Australia ICMP RTT, jitter, packet loss and fiber latency limits on the AS203314 network.

🇧🇷 São Paulo, Brazil (GRU) → 🇦🇺 Melbourne, Australia (MEL)

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

São Paulo to Melbourne averaged 274.7 ms, compared with a 128.34 ms city-centre fiber reference. The difference cannot be assigned to a particular cable or carrier from RTT alone.

Standard deviation was 5.82 ms, or 2.1% of the average. This describes variation within the sample without identifying its cause.

Latency Summary

Metric	Value
RTT	274.7 ms
Jitter	4.86 ms
Packet Loss	0%
Standard Fiber Floor	128.34 ms
Fiber Efficiency	46.7%
Latency Tier	High
Source Region	South America
Destination Region	Asia Pacific

Ping Measurement Series

50 ICMP echo probes were recorded in this round. Individual replies and their distribution are shown below.

Ping series: GRU → MEL

50 ICMP echo samples at 100 ms intervals · round 2026-08-16T04:07:28Z · avg 274.7 ± 0.82 ms (SE)

Sample distribution: box = interquartile range (271.2–277.4 ms), median 272.9 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 (128.3 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	268.72
2	100	272.94
3	200	278.53
4	300	277.85
5	400	275.84
6	500	270.80
7	600	272.38
8	700	270.70
9	800	277.92
10	900	273.52
11	1000	276.51
12	1100	270.87
13	1200	272.17
14	1300	275.26
15	1400	271.44
16	1500	277.85
17	1600	277.64
18	1700	271.62
19	1800	271.29
20	1900	274.97
21	2000	275.33
22	2100	270.72
23	2200	281.68
24	2300	300.54
25	2400	282.71
26	2500	273.09
27	2600	270.69
28	2700	272.85
29	2800	271.23
30	2900	271.57
31	3000	271.42
32	3100	270.07
33	3200	271.06
34	3300	270.07
35	3400	276.28
36	3500	272.28
37	3600	276.27
38	3700	271.20
39	3800	279.00
40	3900	271.72
41	4000	269.28
42	4100	268.34
43	4200	268.04
44	4300	274.10
45	4400	280.29
46	4500	272.67
47	4600	279.25
48	4700	293.69
49	4800	277.88
50	4900	272.86

Download This Route's Data

Download the probe round as CSV, JSON or YAML under CC BY 4.0. Citation details include the route and round timestamp.

CSV JSON YAML Full dataset

Theoretical Fiber Latency

The propagation model uses public city-centre coordinates from GeoNames: São Paulo (-23.54750, -46.63611) and Melbourne (-37.81400, 144.96332). These are not facility coordinates or a surveyed cable path.

Physical Reference	Value
WGS-84 geodesic distance	13,105.1 km
Vacuum RTT floor	87.43 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	128.34 ms
Low-latency fiber material floor	127.82 ms
Engineering floor (5% path allowance)	134.77 ms
Research 1.33× mapped-fiber reference	170.69 ms
Estimated unamplified path loss	2752.1 dB
Transparent optical spans / inline amplifiers	173 / 172
Published RTT inflation over fiber floor	2.14×

The span count assumes 80 km optical spans. Attenuation is a power-loss term, not a propagation delay. See the model assumptions and equations.

Stability & Trend

Statistics from the same 50 replies. They describe this probe round, not continuous historical monitoring.

Round Statistic	Value
Minimum RTT	268.04 ms
Average RTT	274.7 ms
Maximum RTT	300.54 ms
Standard deviation	5.82 ms
Stdev / average	2.1%

Estimated RTT trend

Modeled comparison, not historical probe measurements.

Average: 275.1 ms
Minimum: 272.2 ms
Maximum: 277.4 ms
Average loss: 0.03%

Route Context

Departure PoP: São Paulo (GRU)
Destination PoP: Melbourne (MEL)
Region overview: South America → Asia Pacific
Full global matrix: Backbone Latency Matrix
Physical methodology: Theoretical Fiber Latency

Reverse direction

Melbourne to São Paulo latency and RTT: 305.3 ms

Fastest routes departing São Paulo (GRU)

São Paulo to Miami latency and RTT: 74 ms
São Paulo to New York latency and RTT: 122 ms
São Paulo to Ashburn latency and RTT: 128 ms
São Paulo to Los Angeles latency and RTT: 130.8 ms
São Paulo to Seattle latency and RTT: 155.9 ms

Fastest routes arriving at Melbourne (MEL)

Sydney to Melbourne latency and RTT: 9.8 ms
Singapore to Melbourne latency and RTT: 88.6 ms
Tokyo to Melbourne latency and RTT: 113.9 ms
Hong Kong to Melbourne latency and RTT: 138.4 ms
Taipei to Melbourne latency and RTT: 142 ms

Same corridor (South America → Asia Pacific)

São Paulo to Tokyo latency and RTT: 230.3 ms
São Paulo to Taipei latency and RTT: 259.1 ms
São Paulo to Sydney latency and RTT: 265.5 ms

About This Measurement

These ICMP measurements cover the two backbone endpoints. Access networks, routing policy and load can change an end user's result. A probe round is not an SLA.

The underlying replies are available under CC BY 4.0 in the Hats Network latency dataset. Per-pair files are available at /opendata/latency/latest/pairs/gru-mel.pings.{csv,json,yaml}. Cite the route, round timestamp and dataset version. Example: "Hats Network latency dataset, São Paulo → Melbourne round 2026-08-16T04:07:28Z, CC BY 4.0".

Round published August 16, 2026. See the full interactive latency matrix or browse more city-pair routes.

São Paulo, Brazil → Melbourne, Australia RTT