Miami (USA) to London (UK) ICMP RTT page: 2026-08-15 measurement of average latency, jitter, packet loss, and route stability for MIA-LON.

🇺🇸 Miami, USA (MIA) → 🇬🇧 London, UK (LON)

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

In the 2026-08-15T04:03:13Z ICMP echo RTT round, the Miami-to-London route averaged 100.7 ms over 50 samples, with a minimum of 98.76 ms, a maximum of 106.6 ms, and zero packet loss.

This route ranked fifth among the 19 measured routes in the round, and its 1.61 ms standard deviation equals roughly 1.6 percent of the average — about half the 3.08 percent median variability across the same route set.

Against a 7,138 km great-circle reference, the theoretical fiber floor is 69.9 ms, so the 100.7 ms average sits 1.44 times above that floor and achieves a 69.4 percent fiber efficiency. A jitter value of only 1.28 ms and a tight min-max range reinforce a stable transatlantic connection during the sample.

Latency Summary

Metric	Value
RTT	100.7 ms
Jitter	1.28 ms
Packet Loss	0%
Standard Fiber Floor	69.9 ms
Fiber Efficiency	69.4%
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: MIA → LON

50 ICMP echo samples at 100 ms intervals · round 2026-08-15T04:03:13Z · avg 100.7 ± 0.23 ms (SE)

Sample distribution: box = interquartile range (99.6–101.2 ms), median 100.3 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 (69.9 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	101.98
2	100	100.05
3	200	99.12
4	300	99.61
5	400	99.61
6	500	99.07
7	600	100.04
8	700	99.06
9	800	101.73
10	900	99.51
11	1000	100.29
12	1100	101.08
13	1200	100.68
14	1300	100.18
15	1400	99.71
16	1500	100.31
17	1600	101.34
18	1700	100.58
19	1800	100.36
20	1900	99.73
21	2000	104.02
22	2100	100.64
23	2200	99.95
24	2300	99.03
25	2400	99.29
26	2500	98.91
27	2600	102.57
28	2700	101.93
29	2800	100.32
30	2900	104.10
31	3000	103.50
32	3100	101.24
33	3200	100.77
34	3300	99.75
35	3400	103.34
36	3500	106.60
37	3600	103.85
38	3700	100.58
39	3800	101.09
40	3900	101.73
41	4000	99.89
42	4100	98.90
43	4200	100.86
44	4300	100.82
45	4400	100.02
46	4500	100.09
47	4600	99.57
48	4700	98.76
49	4800	99.10
50	4900	99.74

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 Miami (25.77427, -80.19366) and London (51.50853, -0.12574). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	7,138.4 km
Vacuum RTT floor	47.62 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	69.9 ms
Low-latency fiber material floor	69.62 ms
Engineering floor (5% path allowance)	73.41 ms
Research 1.33× mapped-fiber reference	92.97 ms
Estimated unamplified path loss	1499.1 dB
Transparent optical spans / inline amplifiers	94 / 93
Published RTT inflation over fiber floor	1.44×

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	98.76 ms
Average RTT	100.7 ms
Maximum RTT	106.6 ms
Standard deviation	1.61 ms
Stdev / average	1.6%

RTT trend

Estimated route stability across the selected time window.

Average: 100.7 ms
Minimum: 99.7 ms
Maximum: 101.3 ms
Average loss: 0.02%

Route Context

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

Reverse direction

London to Miami latency and RTT — 100.9 ms

Fastest routes departing Miami (MIA)

Miami to Ashburn latency and RTT — 27.3 ms
Miami to New York latency and RTT — 34 ms
Miami to Los Angeles latency and RTT — 56.8 ms
Miami to Seattle latency and RTT — 82 ms
Miami to Paris latency and RTT — 105.4 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 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/mia-lon.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Miami → 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.

Miami, USA → London, UK RTT