ICMP echo RTT data from Los Angeles, USA to London, UK: 129.8 ms average latency, 0% packet loss, and route variability context.

🇺🇸 Los Angeles, USA (LAX) → 🇬🇧 London, UK (LON)

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

The 2026-08-15T04:03:13Z ICMP echo run from Los Angeles to London returned an average round-trip time of 129.8 ms, with a minimum of 125.69 ms and a maximum of 148.64 ms. All 50 probes at 100 ms intervals completed without packet loss, and the latency tier was good.

Over the 8,776.7 km geodesic distance, the vacuum round-trip floor is 58.55 ms and the ideal fiber floor is 85.95 ms. The measured average is 1.51 times the fiber floor, equivalent to 66.2% fiber-optical efficiency.

In the network's outbound route set, this route ranked 6th among 19 routes. Its standard deviation of 4.32 ms is 3.33% of the average, just above the network's median standard-deviation-to-average ratio of 3.08%, and jitter was 3.46 ms. The tight min-to-max range suggests this route is relatively steady as well as fast.

Latency Summary

Metric	Value
RTT	129.8 ms
Jitter	3.46 ms
Packet Loss	0%
Standard Fiber Floor	85.95 ms
Fiber Efficiency	66.2%
Latency Tier	Good
Source Region	North America
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: LAX → LON

50 ICMP echo samples at 100 ms intervals · round 2026-08-15T04:03:13Z · avg 129.8 ± 0.61 ms (SE)

Sample distribution: box = interquartile range (126.9–131.2 ms), median 128.6 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 (86.0 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	148.64
2	100	133.38
3	200	129.92
4	300	126.75
5	400	127.79
6	500	126.85
7	600	126.79
8	700	126.06
9	800	130.93
10	900	127.32
11	1000	128.80
12	1100	138.34
13	1200	131.27
14	1300	127.84
15	1400	126.50
16	1500	126.12
17	1600	128.98
18	1700	126.54
19	1800	126.21
20	1900	136.86
21	2000	129.22
22	2100	130.80
23	2200	127.35
24	2300	135.25
25	2400	131.90
26	2500	132.53
27	2600	127.91
28	2700	137.61
29	2800	129.46
30	2900	127.82
31	3000	127.00
32	3100	125.87
33	3200	125.69
34	3300	128.65
35	3400	135.28
36	3500	132.67
37	3600	128.72
38	3700	127.13
39	3800	125.88
40	3900	126.00
41	4000	127.56
42	4100	127.08
43	4200	125.91
44	4300	128.46
45	4400	137.68
46	4500	130.61
47	4600	131.51
48	4700	129.69
49	4800	129.27
50	4900	127.60

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 Los Angeles (34.05223, -118.24368) and London (51.50853, -0.12574). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	8,776.7 km
Vacuum RTT floor	58.55 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	85.95 ms
Low-latency fiber material floor	85.6 ms
Engineering floor (5% path allowance)	90.26 ms
Research 1.33× mapped-fiber reference	114.31 ms
Estimated unamplified path loss	1843.1 dB
Transparent optical spans / inline amplifiers	116 / 115
Published RTT inflation over fiber floor	1.51×

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	125.69 ms
Average RTT	129.8 ms
Maximum RTT	148.64 ms
Standard deviation	4.32 ms
Stdev / average	3.3%

RTT trend

Estimated route stability across the selected time window.

Average: 129.8 ms
Minimum: 128.4 ms
Maximum: 131.0 ms
Average loss: 0.01%

Route Context

Departure PoP: Los Angeles (LAX)
Destination PoP: London (LON)
Region overview: North America → Europe
Full global matrix: Backbone Latency Matrix
Physical methodology: Theoretical Fiber Latency

Reverse direction

London to Los Angeles latency and RTT — 130.1 ms

Fastest routes departing Los Angeles (LAX)

Los Angeles to Seattle latency and RTT — 27.5 ms
Los Angeles to Miami latency and RTT — 57.1 ms
Los Angeles to New York latency and RTT — 59 ms
Los Angeles to Ashburn latency and RTT — 59.9 ms
Los Angeles to Tokyo latency and RTT — 100.9 ms

Fastest routes arriving at London (LON)

Amsterdam to London latency and RTT — 5.1 ms
Paris to London latency and RTT — 7.1 ms
Frankfurt to London latency and RTT — 12.6 ms
Berlin to London latency and RTT — 15.9 ms
Marseille to London latency and RTT — 24.5 ms

Same corridor (North America → Europe)

New York to London latency and RTT — 64.3 ms
New York to Paris latency and RTT — 68.4 ms
New York to Amsterdam latency and RTT — 68.5 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/lax-lon.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Los Angeles → London 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.

Los Angeles, USA → London, UK RTT