ICMP RTT from New York, USA to London, UK: latency, packet loss, jitter, and route efficiency for the 2026-08-15 measurement round.

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

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

For the 2026-08-15T04:03:13Z round, the average ICMP echo RTT from New York, USA to London, UK was 64.3 ms, with a minimum of 63.21 ms, a maximum of 69.34 ms, and zero packet loss across 50 samples.

The route ran at 85.1% fiber efficiency, or 1.18 times the 54.69 ms direct fiber round-trip floor, over a 5,585 km great-circle path. It ranked 5th among 19 outbound routes, and its 1.22 ms standard deviation is about 1.9% of the average—well below the 3.08% median relative spread for the route set.

London's traditional role as the western anchor of the Northwest European corridor, combined with jitter of 0.95 ms and zero loss, points to a mature and stable transatlantic path. The near-floor RTT makes this pairing one of the more efficient routes in the set.

Latency Summary

Metric	Value
RTT	64.3 ms
Jitter	0.95 ms
Packet Loss	0%
Standard Fiber Floor	54.69 ms
Fiber Efficiency	85.1%
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 2026-08-15T04:03:13Z · avg 64.3 ± 0.17 ms (SE)

Sample distribution: box = interquartile range (63.5–64.6 ms), median 63.9 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	63.23
2	100	63.72
3	200	63.42
4	300	64.59
5	400	64.43
6	500	64.74
7	600	64.50
8	700	64.65
9	800	63.71
10	900	63.53
11	1000	63.44
12	1100	63.39
13	1200	63.33
14	1300	63.77
15	1400	63.53
16	1500	63.95
17	1600	64.50
18	1700	63.49
19	1800	63.82
20	1900	65.06
21	2000	64.07
22	2100	65.52
23	2200	64.34
24	2300	63.53
25	2400	63.89
26	2500	63.56
27	2600	69.34
28	2700	66.19
29	2800	66.79
30	2900	64.70
31	3000	63.53
32	3100	64.69
33	3200	63.73
34	3300	63.39
35	3400	64.68
36	3500	64.53
37	3600	63.58
38	3700	64.01
39	3800	63.55
40	3900	63.34
41	4000	63.27
42	4100	63.37
43	4200	65.93
44	4300	64.01
45	4400	66.00
46	4500	64.01
47	4600	64.07
48	4700	63.38
49	4800	63.21
50	4900	67.99

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	1.18×

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	63.21 ms
Average RTT	64.3 ms
Maximum RTT	69.34 ms
Standard deviation	1.22 ms
Stdev / average	1.9%

RTT trend

Estimated route stability across the selected time window.

Average: 64.4 ms
Minimum: 63.8 ms
Maximum: 64.9 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 — 63.5 ms

Fastest routes departing New York (NYC)

New York to Ashburn latency and RTT — 6 ms
New York to Miami latency and RTT — 34.3 ms
New York to Los Angeles latency and RTT — 58 ms
New York to Seattle latency and RTT — 59 ms
New York to Paris latency and RTT — 68.4 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 Amsterdam latency and RTT — 68.5 ms
Ashburn to London latency and RTT — 70.4 ms
New York to Frankfurt latency and RTT — 74.2 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 2026-08-15T04:03:13Z, CC BY 4.0".

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

New York, USA → London, UK RTT