ICMP RTT measurements between Hong Kong, Hong Kong and London, UK: average, minimum and maximum latency, jitter, packet loss and route stability.

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

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

In the 2026-08-15T04:03:13Z round, 50 ICMP echo probes from Hong Kong to London averaged 158.3 ms, with a minimum of 152.79 ms, a maximum of 175.92 ms, and zero packet loss. Jitter of 3.85 ms and a standard deviation of 4.89 ms indicate a consistent path over the 9,644 km route.

At 1.68 times the theoretical fiber-floor RTT for the distance, the route works out to 59.7% fiber efficiency. The roughly 64 ms gap between measured RTT and the floor is expected because the floor assumes a straight-line fiber ideal rather than the actual cable infrastructure.

This route is ranked 12th among the 19 outbound routes in the same round, placing it just beyond the midpoint. Its relative variability is about 3.1% of average RTT, closely matching the 3.08% median across the route set; with no loss, London traffic can be treated as a stable near-158 ms baseline in this round.

Latency Summary

Metric	Value
RTT	158.3 ms
Jitter	3.85 ms
Packet Loss	0%
Standard Fiber Floor	94.44 ms
Fiber Efficiency	59.7%
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 2026-08-15T04:03:13Z · avg 158.3 ± 0.69 ms (SE)

Sample distribution: box = interquartile range (155.3–160.1 ms), median 156.8 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	152.79
2	100	156.58
3	200	157.21
4	300	158.06
5	400	154.71
6	500	153.94
7	600	153.97
8	700	155.60
9	800	162.31
10	900	175.92
11	1000	163.03
12	1100	156.32
13	1200	161.40
14	1300	155.95
15	1400	155.30
16	1500	153.64
17	1600	162.61
18	1700	156.85
19	1800	156.29
20	1900	154.68
21	2000	153.81
22	2100	153.76
23	2200	171.81
24	2300	166.08
25	2400	163.74
26	2500	156.73
27	2600	170.61
28	2700	160.65
29	2800	156.90
30	2900	156.62
31	3000	160.38
32	3100	157.29
33	3200	158.82
34	3300	157.99
35	3400	156.70
36	3500	165.42
37	3600	162.72
38	3700	157.92
39	3800	156.27
40	3900	157.89
41	4000	155.45
42	4100	153.94
43	4200	153.85
44	4300	153.85
45	4400	155.59
46	4500	157.71
47	4600	157.06
48	4700	159.18
49	4800	155.27
50	4900	153.83

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

Round Statistic	Value
Minimum RTT	152.79 ms
Average RTT	158.3 ms
Maximum RTT	175.92 ms
Standard deviation	4.89 ms
Stdev / average	3.1%

RTT trend

Estimated route stability across the selected time window.

Average: 158.3 ms
Minimum: 156.8 ms
Maximum: 159.8 ms
Average loss: 0.04%

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 — 160.5 ms

Fastest routes departing Hong Kong (HKG)

Hong Kong to Taipei latency and RTT — 15.2 ms
Hong Kong to Singapore latency and RTT — 31.2 ms
Hong Kong to Tokyo latency and RTT — 45 ms
Hong Kong to Moscow latency and RTT — 116.6 ms
Hong Kong to Seattle latency and RTT — 129.9 ms

Fastest routes arriving at London (LON)

Amsterdam to London latency and RTT — 5.1 ms
Paris to London latency and RTT — 7.1 ms
Frankfurt to London latency and RTT — 12.6 ms
Berlin to London latency and RTT — 15.9 ms
Marseille to London latency and RTT — 24.5 ms

Same corridor (Asia Pacific → Europe)

Taipei to Moscow latency and RTT — 131.7 ms
Singapore to Marseille latency and RTT — 138.8 ms
Hong Kong to Berlin latency and RTT — 143.6 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 2026-08-15T04:03:13Z, CC BY 4.0".

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

Hong Kong → London, UK RTT