ICMP round-trip time data from Los Angeles, USA to Sydney, Australia: average 139 ms, packet loss 0%, latency stability, and network ranking context.

🇺🇸 Los Angeles, USA (LAX) → 🇦🇺 Sydney, Australia (SYD)

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

In round 2026-08-15T04:03:13Z, 50 ICMP echo probes from Los Angeles to Sydney averaged 139 ms round-trip, with a minimum of 135.99 ms and a maximum of 147.53 ms. The route lost no packets, and the standard deviation of 2.33 ms kept jitter at 2.08 ms.

At rank 12 of the 19 outbound routes, Sydney sits near the middle of the ordering, with a slight lean toward the slower side. The route's variation is much tighter than the network's median variation figure of 3.08%, coming in under 2% of the average, so the latency is consistent across the 50 samples.

Over a 12,063 km path, the fiber-only round-trip floor is about 118.13 ms; the observed average is 1.18x that floor, translating to an 85% fiber efficiency. The extra 21 ms above the floor is a modest overhead for a trans-Pacific distance.

Latency Summary

Metric	Value
RTT	139 ms
Jitter	2.08 ms
Packet Loss	0%
Standard Fiber Floor	118.13 ms
Fiber Efficiency	85%
Latency Tier	Good
Source Region	North America
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: LAX → SYD

50 ICMP echo samples at 100 ms intervals · round 2026-08-15T04:03:13Z · avg 139.0 ± 0.33 ms (SE)

Sample distribution: box = interquartile range (137.4–140.3 ms), median 138.4 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 (118.1 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	136.07
2	100	135.99
3	200	136.49
4	300	137.29
5	400	137.42
6	500	140.33
7	600	138.74
8	700	137.30
9	800	136.49
10	900	137.02
11	1000	140.66
12	1100	143.36
13	1200	140.83
14	1300	138.92
15	1400	141.08
16	1500	140.30
17	1600	137.51
18	1700	136.78
19	1800	138.37
20	1900	138.28
21	2000	147.53
22	2100	140.53
23	2200	137.67
24	2300	139.74
25	2400	139.01
26	2500	137.04
27	2600	137.69
28	2700	138.51
29	2800	137.39
30	2900	139.15
31	3000	138.09
32	3100	138.38
33	3200	137.10
34	3300	141.22
35	3400	140.76
36	3500	138.08
37	3600	136.70
38	3700	137.85
39	3800	140.71
40	3900	144.15
41	4000	139.24
42	4100	137.53
43	4200	138.91
44	4300	139.26
45	4400	145.60
46	4500	139.46
47	4600	137.84
48	4700	137.84
49	4800	140.19
50	4900	137.60

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 Los Angeles (34.05223, -118.24368) and Sydney (-33.86785, 151.20732). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	12,063.2 km
Vacuum RTT floor	80.48 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	118.13 ms
Low-latency fiber material floor	117.66 ms
Engineering floor (5% path allowance)	124.05 ms
Research 1.33× mapped-fiber reference	157.12 ms
Estimated unamplified path loss	2533.3 dB
Transparent optical spans / inline amplifiers	159 / 158
Published RTT inflation over fiber floor	1.18×

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	135.99 ms
Average RTT	139 ms
Maximum RTT	147.53 ms
Standard deviation	2.33 ms
Stdev / average	1.7%

RTT trend

Estimated route stability across the selected time window.

Average: 139.0 ms
Minimum: 137.9 ms
Maximum: 140.3 ms
Average loss: 0.01%

Route Context

Departure PoP: Los Angeles (LAX)
Destination PoP: Sydney (SYD)
Region overview: North America → Asia Pacific
Corridor overview: North America to Asia Pacific
Full global matrix: Backbone Latency Matrix
Physical methodology: Theoretical Fiber Latency

Reverse direction

Sydney to Los Angeles latency and RTT — 136.2 ms

Fastest routes departing Los Angeles (LAX)

Los Angeles to Seattle latency and RTT — 27.5 ms
Los Angeles to Miami latency and RTT — 57.1 ms
Los Angeles to New York latency and RTT — 59 ms
Los Angeles to Ashburn latency and RTT — 59.9 ms
Los Angeles to Tokyo latency and RTT — 100.9 ms

Fastest routes arriving at Sydney (SYD)

Melbourne to Sydney latency and RTT — 9.8 ms
Singapore to Sydney latency and RTT — 95.3 ms
Tokyo to Sydney latency and RTT — 101.6 ms
Taipei to Sydney latency and RTT — 131.8 ms
Hong Kong to Sydney latency and RTT — 136.3 ms

Same corridor (North America → Asia Pacific)

Seattle to Tokyo latency and RTT — 84.8 ms
Seattle to Taipei latency and RTT — 115.1 ms
Seattle to Hong Kong latency and RTT — 130.7 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/lax-syd.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Los Angeles → Sydney 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.

Los Angeles, USA → Sydney, Australia RTT