ICMP round-trip time measurements from Singapore to London, UK: average RTT, jitter, packet loss, and distance-adjusted latency from 50 test samples.

🇸🇬 Singapore (SIN) → 🇬🇧 London, UK (LON)

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

During the 2026-08-16T04:07:28Z measurement round, ICMP echo requests sent from Singapore to London, UK, produced an average round-trip time of 155.4 ms, with a minimum of 150.37 ms, a maximum of 180.35 ms, and no packet loss across all 50 samples. The standard deviation was 5.16 ms and jitter was 3.28 ms, so the route maintained a fairly narrow, repeatable RTT profile.

The straight-line separation of 10,859.7 km yields an ideal fiber-only floor of about 106.35 ms. The measured average is 1.46 times that floor, which puts distance-adjusted efficiency at 68.4%; roughly 49 ms of overhead is added beyond the theoretical minimum for this route.

Across the 19 outbound routes measured from Singapore in the same round, this route ranked 11th by average RTT. Its observed variation of 5.16 ms is a slightly larger share of the mean than the network-wide median ratio of 3.28%, meaning the occasional 180 ms samples are less typical; most probes sit near the low-150s portion of the range.

Latency Summary

Metric	Value
RTT	155.4 ms
Jitter	3.28 ms
Packet Loss	0%
Standard Fiber Floor	106.35 ms
Fiber Efficiency	68.4%
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: SIN → LON

50 ICMP echo samples at 100 ms intervals · round 2026-08-16T04:07:28Z · avg 155.4 ± 0.73 ms (SE)

Sample distribution: box = interquartile range (152.1–156.7 ms), median 154.0 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 (106.3 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	150.37
2	100	152.24
3	200	150.73
4	300	154.32
5	400	152.02
6	500	153.36
7	600	154.08
8	700	151.78
9	800	161.13
10	900	160.48
11	1000	160.36
12	1100	154.97
13	1200	151.49
14	1300	153.37
15	1400	152.27
16	1500	156.41
17	1600	151.99
18	1700	150.83
19	1800	152.28
20	1900	153.69
21	2000	155.24
22	2100	154.87
23	2200	154.91
24	2300	152.02
25	2400	156.81
26	2500	156.34
27	2600	152.37
28	2700	154.79
29	2800	152.03
30	2900	159.04
31	3000	161.34
32	3100	180.35
33	3200	168.23
34	3300	164.50
35	3400	157.07
36	3500	152.51
37	3600	153.01
38	3700	152.62
39	3800	151.13
40	3900	155.65
41	4000	151.81
42	4100	153.94
43	4200	154.23
44	4300	157.28
45	4400	153.84
46	4500	151.62
47	4600	150.95
48	4700	157.13
49	4800	160.60
50	4900	155.60

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 Singapore (1.28967, 103.85007) and London (51.50853, -0.12574). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	10,859.7 km
Vacuum RTT floor	72.45 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	106.35 ms
Low-latency fiber material floor	105.92 ms
Engineering floor (5% path allowance)	111.68 ms
Research 1.33× mapped-fiber reference	141.44 ms
Estimated unamplified path loss	2280.5 dB
Transparent optical spans / inline amplifiers	143 / 142
Published RTT inflation over fiber floor	1.46×

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	150.37 ms
Average RTT	155.4 ms
Maximum RTT	180.35 ms
Standard deviation	5.16 ms
Stdev / average	3.3%

RTT trend

Estimated route stability across the selected time window.

Average: 155.6 ms
Minimum: 153.7 ms
Maximum: 156.9 ms
Average loss: 0.03%

Route Context

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

Reverse direction

London to Singapore latency and RTT — 156.5 ms

Fastest routes departing Singapore (SIN)

Singapore to Hong Kong latency and RTT — 30.8 ms
Singapore to Taipei latency and RTT — 45.8 ms
Singapore to Tokyo latency and RTT — 68.9 ms
Singapore to Melbourne latency and RTT — 88.6 ms
Singapore to Sydney latency and RTT — 94.5 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)

Hong Kong to Moscow latency and RTT — 118.2 ms
Taipei to Moscow latency and RTT — 132.7 ms
Singapore to Marseille latency and RTT — 140.6 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/sin-lon.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Singapore → 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.

Singapore → London, UK RTT