London to Berlin ICMP RTT measurements for 2026-08-15: average 16.2 ms, zero packet loss, and jitter 0.63 ms on the UK–Germany route.

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

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

The London–Berlin ICMP echo RTT for the 2026-08-15T04:03:13Z round averaged 16.2 ms, with a minimum of 15.23 ms and a maximum of 17.84 ms; all 50 samples arrived with no packet loss.

This path has the fourth-lowest average latency among the 19 routes measured from London in the same round. The average is 1.77 times the 9.15 ms fiber-floor estimate for the 934.7 km great-circle distance, leaving a fiber efficiency of 56.5 percent.

Jitter was 0.63 ms and standard deviation 0.56 ms, a spread of about 3.5 percent of the average. Across the routes measured in this round, the median spread relative to average latency is 3.08 percent, so the relative variation is slightly above the round's midpoint while latency remains in the ultra-low tier.

Latency Summary

Metric	Value
RTT	16.2 ms
Jitter	0.63 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 2026-08-15T04:03:13Z · avg 16.2 ± 0.08 ms (SE)

Sample distribution: box = interquartile range (15.8–16.6 ms), median 16.1 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 (9.2 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	15.75
2	100	16.31
3	200	16.69
4	300	16.30
5	400	15.55
6	500	15.65
7	600	16.09
8	700	15.52
9	800	16.47
10	900	16.19
11	1000	16.60
12	1100	16.22
13	1200	15.83
14	1300	16.09
15	1400	16.74
16	1500	16.04
17	1600	15.60
18	1700	16.13
19	1800	15.52
20	1900	17.36
21	2000	16.15
22	2100	16.79
23	2200	16.39
24	2300	15.59
25	2400	16.57
26	2500	15.78
27	2600	16.87
28	2700	17.08
29	2800	16.24
30	2900	15.99
31	3000	17.84
32	3100	16.68
33	3200	16.50
34	3300	17.68
35	3400	16.08
36	3500	15.94
37	3600	15.75
38	3700	15.42
39	3800	15.23
40	3900	16.38
41	4000	15.66
42	4100	15.56
43	4200	16.47
44	4300	16.20
45	4400	16.60
46	4500	15.69
47	4600	15.62
48	4700	16.66
49	4800	16.11
50	4900	15.83

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

Round Statistic	Value
Minimum RTT	15.23 ms
Average RTT	16.2 ms
Maximum RTT	17.84 ms
Standard deviation	0.56 ms
Stdev / average	3.5%

RTT trend

Estimated route stability across the selected time window.

Average: 16.2 ms
Minimum: 16.0 ms
Maximum: 16.3 ms
Average loss: 0.02%

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 — 15.9 ms

Fastest routes departing London (LON)

London to Amsterdam latency and RTT — 5.1 ms
London to Paris latency and RTT — 7.1 ms
London to Frankfurt latency and RTT — 12.3 ms
London to Marseille latency and RTT — 24.9 ms
London to Moscow latency and RTT — 44.1 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 — 14.8 ms
Marseille to Berlin latency and RTT — 21.5 ms
Moscow to Berlin latency and RTT — 27 ms

Same corridor (Europe → Europe)

Amsterdam to London latency and RTT — 5.1 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 2026-08-15T04:03:13Z, CC BY 4.0".

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

London, UK → Berlin, Germany RTT