ICMP RTT measurement from London, UK to Berlin, Germany: 50-sample round-trip latency, packet loss, jitter, and fiber-floor efficiency for this route.

🇬🇧 London, UK (LON) → 🇩🇪 Berlin, Germany (BER)

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

In round 2026-08-16T04:07:28Z, ICMP echo round-trip time from London, UK to Berlin, Germany averaged 16.2 ms over 50 samples, with minimum 15.5 ms and maximum 19.35 ms. The route reported 0% packet loss and jitter of 0.64 ms.

The 934.7 km geodesic distance corresponds to a fiber-floor RTT estimate of 9.15 ms. The 16.2 ms average is 1.77 times that floor, or 56.5% fiber efficiency; even the 15.5 ms minimum is 6.35 ms above the fiber-floor estimate.

This route ranked fourth among the 19 routes measured from London in this round. Its standard deviation of 0.73 ms equals about 4.5% of the mean, above the 3.28% median spread across those 19 routes. With a 3.85 ms difference between minimum and maximum, the route stays lossless but shows more timing variation than its ultra-low average might imply.

Latency Summary

Metric	Value
RTT	16.2 ms
Jitter	0.64 ms
Packet Loss	0%
Standard Fiber Floor	9.15 ms
Fiber Efficiency	56.5%
Latency Tier	Ultra-Low
Source Region	Europe
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: LON → BER

50 ICMP echo samples at 100 ms intervals · round 2026-08-16T04:07:28Z · avg 16.2 ± 0.10 ms (SE)

Sample distribution: box = interquartile range (15.7–16.3 ms), median 16.0 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 (9.2 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	15.72
2	100	16.73
3	200	16.03
4	300	16.31
5	400	16.13
6	500	15.97
7	600	17.81
8	700	16.38
9	800	16.04
10	900	18.28
11	1000	16.49
12	1100	16.06
13	1200	15.66
14	1300	15.73
15	1400	16.05
16	1500	17.13
17	1600	16.19
18	1700	15.73
19	1800	16.45
20	1900	16.11
21	2000	16.52
22	2100	15.96
23	2200	15.75
24	2300	16.26
25	2400	15.69
26	2500	15.78
27	2600	16.56
28	2700	16.02
29	2800	16.02
30	2900	16.24
31	3000	16.03
32	3100	15.82
33	3200	15.61
34	3300	15.53
35	3400	15.61
36	3500	15.50
37	3600	16.03
38	3700	17.25
39	3800	16.07
40	3900	15.74
41	4000	19.35
42	4100	17.34
43	4200	16.10
44	4300	15.78
45	4400	15.53
46	4500	15.50
47	4600	15.82
48	4700	15.68
49	4800	15.58
50	4900	16.33

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 London (51.50853, -0.12574) and Berlin (52.52437, 13.41053). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	934.7 km
Vacuum RTT floor	6.24 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	9.15 ms
Low-latency fiber material floor	9.12 ms
Engineering floor (5% path allowance)	9.61 ms
Research 1.33× mapped-fiber reference	12.17 ms
Estimated unamplified path loss	196.3 dB
Transparent optical spans / inline amplifiers	13 / 12
Published RTT inflation over fiber floor	1.77×

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	15.5 ms
Average RTT	16.2 ms
Maximum RTT	19.35 ms
Standard deviation	0.73 ms
Stdev / average	4.5%

RTT trend

Estimated route stability across the selected time window.

Average: 16.2 ms
Minimum: 16.0 ms
Maximum: 16.3 ms
Average loss: 0.01%

Route Context

Departure PoP: London (LON)
Destination PoP: Berlin (BER)
Region overview: Europe → Europe
Full global matrix: Backbone Latency Matrix
Physical methodology: Theoretical Fiber Latency

Reverse direction

Berlin to London latency and RTT — 15.2 ms

Fastest routes departing London (LON)

London to Amsterdam latency and RTT — 5.2 ms
London to Paris latency and RTT — 6.4 ms
London to Frankfurt latency and RTT — 13.6 ms
London to Marseille latency and RTT — 17.9 ms
London to Moscow latency and RTT — 43.5 ms

Fastest routes arriving at Berlin (BER)

Frankfurt to Berlin latency and RTT — 6.1 ms
Amsterdam to Berlin latency and RTT — 7.2 ms
Paris to Berlin latency and RTT — 15.5 ms
Marseille to Berlin latency and RTT — 20.6 ms
Moscow to Berlin latency and RTT — 27.5 ms

Same corridor (Europe → Europe)

Amsterdam to London latency and RTT — 5.2 ms
Amsterdam to Frankfurt latency and RTT — 5.9 ms
Frankfurt to Amsterdam latency and RTT — 5.9 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/lon-ber.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, London → Berlin 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.

London, UK → Berlin, Germany RTT