ICMP RTT measurement between New York, USA and London, UK: average, jitter, packet loss, and route stability for the 2026-08-16 round.

🇺🇸 New York, USA (NYC) → 🇬🇧 London, UK (LON)

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

During the 2026-08-16T04:07:28Z round, ICMP echo RTT from New York to London averaged 63.5 ms, with a minimum of 61.91 ms and a maximum of 68.19 ms over 50 samples. There was no packet loss, and the 1.32 ms standard deviation with 1.15 ms jitter points to a very consistent transatlantic path.

The average sits 16% above the 54.69 ms fiber-floor estimate for the 5,585 km route, giving a fiber efficiency of 86.1%. In this round the route ranked 5th among 19 outbound routes from New York, and its measured variability was well below the 3.28% median relative variability for that outbound group.

For a crossing of this length, the absence of loss and the low jitter figure make 63.5 ms a reliable ICMP latency baseline, though ICMP RTT alone should not be used to predict application performance.

Latency Summary

Metric	Value
RTT	63.5 ms
Jitter	1.15 ms
Packet Loss	0%
Standard Fiber Floor	54.69 ms
Fiber Efficiency	86.1%
Latency Tier	Excellent
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: NYC → LON

50 ICMP echo samples at 100 ms intervals · round 2026-08-16T04:07:28Z · avg 63.5 ± 0.19 ms (SE)

Sample distribution: box = interquartile range (62.7–64.1 ms), median 63.2 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 (54.7 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	62.08
2	100	63.95
3	200	62.40
4	300	62.94
5	400	63.62
6	500	62.94
7	600	62.08
8	700	62.79
9	800	63.63
10	900	63.16
11	1000	62.71
12	1100	68.19
13	1200	66.05
14	1300	64.51
15	1400	63.32
16	1500	62.23
17	1600	64.49
18	1700	64.23
19	1800	63.18
20	1900	62.55
21	2000	63.98
22	2100	63.01
23	2200	63.31
24	2300	62.96
25	2400	62.75
26	2500	62.01
27	2600	64.89
28	2700	62.73
29	2800	62.22
30	2900	62.69
31	3000	62.29
32	3100	62.60
33	3200	62.40
34	3300	61.91
35	3400	64.41
36	3500	62.56
37	3600	64.16
38	3700	63.53
39	3800	62.65
40	3900	63.41
41	4000	62.83
42	4100	66.25
43	4200	67.04
44	4300	64.24
45	4400	65.94
46	4500	64.38
47	4600	63.00
48	4700	63.29
49	4800	63.31
50	4900	63.20

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 New York City (40.71427, -74.00597) and London (51.50853, -0.12574). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	5,585.2 km
Vacuum RTT floor	37.26 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	54.69 ms
Low-latency fiber material floor	54.48 ms
Engineering floor (5% path allowance)	57.44 ms
Research 1.33× mapped-fiber reference	72.74 ms
Estimated unamplified path loss	1172.9 dB
Transparent optical spans / inline amplifiers	74 / 73
Published RTT inflation over fiber floor	1.16×

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	61.91 ms
Average RTT	63.5 ms
Maximum RTT	68.19 ms
Standard deviation	1.32 ms
Stdev / average	2.1%

RTT trend

Estimated route stability across the selected time window.

Average: 63.5 ms
Minimum: 62.9 ms
Maximum: 64.2 ms
Average loss: 0.03%

Route Context

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

Reverse direction

London to New York latency and RTT — 63.8 ms

Fastest routes departing New York (NYC)

New York to Ashburn latency and RTT — 6 ms
New York to Miami latency and RTT — 32.9 ms
New York to Seattle latency and RTT — 58.7 ms
New York to Los Angeles latency and RTT — 58.9 ms
New York to Amsterdam latency and RTT — 68.7 ms

Fastest routes arriving at London (LON)

Amsterdam to London latency and RTT — 5.2 ms
Paris to London latency and RTT — 6.4 ms
Frankfurt to London latency and RTT — 12.9 ms
Berlin to London latency and RTT — 15.2 ms
Marseille to London latency and RTT — 18.9 ms

Same corridor (North America → Europe)

New York to Paris latency and RTT — 68.9 ms
Ashburn to London latency and RTT — 70.3 ms
New York to Frankfurt latency and RTT — 73.9 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/nyc-lon.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, New York → London 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.

New York, USA → London, UK RTT