London to Frankfurt ping and RTT: 12.8 ms, 0.22 ms jitter, 6.26 ms fiber floor, and 48.9% efficiency across AS203314. Updated 2026-08-09.

🇬🇧 This page compares the published ping and round-trip time (RTT) from London (LON) to 🇩🇪 Frankfurt (FRA) with vacuum and optical-fiber physical limits.

As of August 9, 2026, the London → Frankfurt route on Hats Network averages 12.8 ms RTT across a 50-sample daily ICMP echo measurement round (source: NL-IX), 2.04× the theoretical fiber-floor limit of 6.26 ms.

Among the 19 measured routes departing London, this route ranks 3rd fastest by average RTT.

With a stdev-to-average ratio of 1.8%, this route is more stable than the network median of 3.4%. Across the round, per-probe RTT ranged from 12.54 ms to 13.65 ms with a standard deviation of 0.23 ms.

Latency Summary

Metric	Value
RTT	12.8 ms
Jitter	0.22 ms
Packet Loss	0%
Standard Fiber Floor	6.26 ms
Fiber Efficiency	48.9%
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 → FRA

50 ICMP echo samples at 100 ms intervals · round 2026-08-09 · avg 12.8 ± 0.03 ms (SE)

Sample distribution: box = interquartile range (12.6–12.9 ms), median 12.8 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 (6.3 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	12.54
2	100	13.44
3	200	13.01
4	300	12.78
5	400	12.80
6	500	12.64
7	600	12.59
8	700	12.60
9	800	12.65
10	900	12.60
11	1000	12.54
12	1100	12.60
13	1200	13.02
14	1300	12.81
15	1400	12.75
16	1500	12.73
17	1600	13.29
18	1700	12.83
19	1800	12.67
20	1900	12.80
21	2000	13.65
22	2100	12.97
23	2200	12.88
24	2300	12.80
25	2400	12.67
26	2500	12.73
27	2600	12.91
28	2700	12.81
29	2800	12.99
30	2900	12.75
31	3000	12.68
32	3100	12.57
33	3200	12.55
34	3300	12.56
35	3400	12.94
36	3500	12.67
37	3600	12.98
38	3700	12.77
39	3800	12.93
40	3900	12.66
41	4000	12.58
42	4100	13.33
43	4200	12.86
44	4300	12.67
45	4400	12.89
46	4500	12.74
47	4600	12.60
48	4700	12.89
49	4800	12.66
50	4900	12.62

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 Frankfurt am Main (50.11552, 8.68417). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	639.5 km
Vacuum RTT floor	4.27 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	6.26 ms
Low-latency fiber material floor	6.24 ms
Engineering floor (5% path allowance)	6.58 ms
Research 1.33× mapped-fiber reference	8.33 ms
Estimated unamplified path loss	134.3 dB
Transparent optical spans / inline amplifiers	9 / 8
Published RTT inflation over fiber floor	2.04×

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 (2026-08-09) collected 50 ICMP echo samples on this route. Distribution statistics from that round:

Round Statistic	Value
Minimum RTT	12.54 ms
Average RTT	12.8 ms
Maximum RTT	13.65 ms
Standard deviation	0.23 ms
Stdev / average	1.8%

RTT trend

Estimated route stability across the selected time window.

Average: 12.8 ms
Minimum: 12.7 ms
Maximum: 12.9 ms
Average loss: 0.02%

Route Context

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

Reverse direction

Frankfurt to London latency and RTT — 13.2 ms

Fastest routes departing London (LON)

London to Amsterdam latency and RTT — 5.1 ms
London to Paris latency and RTT — 6.4 ms
London to Berlin latency and RTT — 16.5 ms
London to Marseille latency and RTT — 18.2 ms
London to Moscow latency and RTT — 42.7 ms

Fastest routes arriving at Frankfurt (FRA)

Amsterdam to Frankfurt latency and RTT — 5.9 ms
Berlin to Frankfurt latency and RTT — 6.1 ms
Paris to Frankfurt latency and RTT — 7.6 ms
Marseille to Frankfurt latency and RTT — 16.8 ms
Moscow to Frankfurt latency and RTT — 35.4 ms

Same corridor (Europe → Europe)

Amsterdam to London latency and RTT — 5.1 ms
Frankfurt to Amsterdam latency and RTT — 5.9 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-fra.pings.{csv,json,yaml}. When citing, include the route, the measurement round date, and the dataset version — for example: "Hats Network latency dataset, London → Frankfurt round 2026-08-09, CC BY 4.0".

Data auto-generated on August 9, 2026. Explore the full interactive latency matrix or browse more city-pair routes.

London to Frankfurt Latency, Ping & RTT | AS203314