London to Amsterdam ICMP RTT measurements for 2026-08-15: average 5.1 ms, zero packet loss, and jitter 0.23 ms on the UK–Netherlands route.

🇬🇧 London, UK (LON) → 🇳🇱 Amsterdam, Netherlands (AMS)

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

The London–Amsterdam ICMP echo RTT for the 2026-08-15T04:03:13Z round averaged 5.1 ms, with a minimum of 4.8 ms, a maximum of 5.88 ms, and zero packet loss across 50 samples.

This path has the lowest average latency among the 19 routes measured from London in the same round. Its latency is only 1.45 times the 3.51 ms fiber-floor estimate for a 358 km great-circle distance, putting the route at roughly 68.7 percent fiber efficiency.

Round-trip jitter was 0.23 ms and standard deviation was 0.24 ms, a spread of about 4.7 percent of the average. Across the routes measured in this round, the median spread relative to average latency is 3.08 percent, so while the absolute variation is tiny, the relative spread is above the round's midpoint.

Latency Summary

Metric	Value
RTT	5.1 ms
Jitter	0.23 ms
Packet Loss	0%
Standard Fiber Floor	3.51 ms
Fiber Efficiency	68.7%
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 → AMS

50 ICMP echo samples at 100 ms intervals · round 2026-08-15T04:03:13Z · avg 5.1 ± 0.03 ms (SE)

Sample distribution: box = interquartile range (4.9–5.2 ms), median 5.0 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 (3.5 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	5.32
2	100	5.04
3	200	4.89
4	300	4.80
5	400	5.11
6	500	4.92
7	600	4.85
8	700	5.58
9	800	5.48
10	900	5.08
11	1000	4.88
12	1100	5.00
13	1200	5.37
14	1300	5.14
15	1400	5.15
16	1500	4.99
17	1600	5.04
18	1700	5.16
19	1800	5.88
20	1900	5.22
21	2000	5.03
22	2100	5.19
23	2200	5.05
24	2300	5.20
25	2400	5.41
26	2500	5.06
27	2600	5.06
28	2700	5.03
29	2800	5.01
30	2900	4.85
31	3000	5.81
32	3100	5.20
33	3200	5.05
34	3300	5.01
35	3400	4.84
36	3500	5.06
37	3600	5.65
38	3700	5.09
39	3800	4.94
40	3900	4.89
41	4000	5.06
42	4100	4.95
43	4200	4.83
44	4300	4.80
45	4400	4.99
46	4500	4.85
47	4600	4.86
48	4700	5.13
49	4800	5.17
50	4900	5.03

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 Amsterdam (52.37403, 4.88969). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	358 km
Vacuum RTT floor	2.39 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	3.51 ms
Low-latency fiber material floor	3.49 ms
Engineering floor (5% path allowance)	3.68 ms
Research 1.33× mapped-fiber reference	4.66 ms
Estimated unamplified path loss	75.2 dB
Transparent optical spans / inline amplifiers	5 / 4
Published RTT inflation over fiber floor	1.45×

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	4.8 ms
Average RTT	5.1 ms
Maximum RTT	5.88 ms
Standard deviation	0.24 ms
Stdev / average	4.7%

RTT trend

Estimated route stability across the selected time window.

Average: 5.1 ms
Minimum: 5.0 ms
Maximum: 5.1 ms
Average loss: 0.02%

Route Context

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

Reverse direction

Amsterdam to London latency and RTT — 5.1 ms

Fastest routes departing London (LON)

London to Paris latency and RTT — 7.1 ms
London to Frankfurt latency and RTT — 12.3 ms
London to Berlin latency and RTT — 16.2 ms
London to Marseille latency and RTT — 24.9 ms
London to Moscow latency and RTT — 44.1 ms

Fastest routes arriving at Amsterdam (AMS)

Frankfurt to Amsterdam latency and RTT — 5.9 ms
Paris to Amsterdam latency and RTT — 7 ms
Berlin to Amsterdam latency and RTT — 7.2 ms
Marseille to Amsterdam latency and RTT — 19.6 ms
Moscow to Amsterdam latency and RTT — 39.3 ms

Same corridor (Europe → Europe)

Amsterdam to Frankfurt latency and RTT — 5.9 ms
Berlin to Frankfurt latency and RTT — 6.1 ms
Frankfurt to Berlin latency and RTT — 6.1 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/lon-ams.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, London → Amsterdam 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 → Amsterdam, Netherlands RTT