Hong Kong, Hong Kong to London, UK ICMP RTT measurement: 158.7 ms average, 154.18 ms min, 172.16 ms max, 0% loss over 50 samples.

🇭🇰 Hong Kong (HKG) → 🇬🇧 London, UK (LON)

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

In the 2026-08-16T04:07:28Z round, 50 ICMP echo probes sent 100 ms apart from Hong Kong to London all came back, producing zero packet loss and an average RTT of 158.7 ms, with a minimum of 154.18 ms and a maximum of 172.16 ms. The standard deviation was 4.34 ms and jitter was 3.3 ms, so the path was relatively stable during the sample.

Against the 9,643.6 km great-circle distance, the round-trip vacuum floor is 64.34 ms and the fiber floor is 94.44 ms. The 158.7 ms average is 1.68 times the fiber floor, which corresponds to 59.5 percent fiber efficiency and leaves a 64.26 ms gap over the straight-line fiber minimum.

This route ranked 12th among the 19 outbound paths measured from Hong Kong in the same round. Its variability ratio of roughly 2.73 percent was below the 3.28 percent median for those paths, meaning the round-trip times clustered more tightly around the average than was typical.

Latency Summary

Metric	Value
RTT	158.7 ms
Jitter	3.3 ms
Packet Loss	0%
Standard Fiber Floor	94.44 ms
Fiber Efficiency	59.5%
Latency Tier	Fair
Source Region	Asia Pacific
Destination Region	Europe

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: HKG → LON

50 ICMP echo samples at 100 ms intervals · round 2026-08-16T04:07:28Z · avg 158.7 ± 0.61 ms (SE)

Sample distribution: box = interquartile range (155.6–159.8 ms), median 157.1 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 (94.4 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	154.18
2	100	154.72
3	200	155.11
4	300	157.81
5	400	155.86
6	500	155.18
7	600	159.83
8	700	170.95
9	800	162.63
10	900	157.95
11	1000	155.97
12	1100	156.70
13	1200	156.57
14	1300	155.03
15	1400	157.49
16	1500	156.62
17	1600	155.03
18	1700	155.48
19	1800	154.93
20	1900	155.64
21	2000	155.35
22	2100	161.33
23	2200	162.91
24	2300	162.32
25	2400	157.93
26	2500	168.89
27	2600	163.37
28	2700	159.70
29	2800	156.14
30	2900	158.28
31	3000	155.64
32	3100	155.32
33	3200	156.90
34	3300	156.52
35	3400	161.86
36	3500	157.52
37	3600	156.38
38	3700	169.91
39	3800	164.77
40	3900	159.11
41	4000	172.16
42	4100	162.63
43	4200	158.94
44	4300	156.52
45	4400	158.70
46	4500	156.09
47	4600	155.67
48	4700	155.52
49	4800	157.74
50	4900	157.20

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 Hong Kong (22.27832, 114.17469) and London (51.50853, -0.12574). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	9,643.6 km
Vacuum RTT floor	64.34 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	94.44 ms
Low-latency fiber material floor	94.06 ms
Engineering floor (5% path allowance)	99.17 ms
Research 1.33× mapped-fiber reference	125.6 ms
Estimated unamplified path loss	2025.2 dB
Transparent optical spans / inline amplifiers	127 / 126
Published RTT inflation over fiber floor	1.68×

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	154.18 ms
Average RTT	158.7 ms
Maximum RTT	172.16 ms
Standard deviation	4.34 ms
Stdev / average	2.7%

RTT trend

Estimated route stability across the selected time window.

Average: 158.9 ms
Minimum: 157.5 ms
Maximum: 160.2 ms
Average loss: 0.02%

Route Context

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

Reverse direction

London to Hong Kong latency and RTT — 160.6 ms

Fastest routes departing Hong Kong (HKG)

Hong Kong to Taipei latency and RTT — 14.7 ms
Hong Kong to Singapore latency and RTT — 31.5 ms
Hong Kong to Tokyo latency and RTT — 44.9 ms
Hong Kong to Moscow latency and RTT — 118.2 ms
Hong Kong to Seattle latency and RTT — 131.6 ms

Fastest routes arriving at London (LON)

Amsterdam to London latency and RTT — 5.2 ms
Paris to London latency and RTT — 6.4 ms
Frankfurt to London latency and RTT — 12.9 ms
Berlin to London latency and RTT — 15.2 ms
Marseille to London latency and RTT — 18.9 ms

Same corridor (Asia Pacific → Europe)

Taipei to Moscow latency and RTT — 132.7 ms
Singapore to Marseille latency and RTT — 140.6 ms
Hong Kong to Berlin latency and RTT — 145.1 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/hkg-lon.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Hong Kong → London 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.

Hong Kong → London, UK RTT