Johannesburg to Miami ping and RTT: 259.3 ms, 3.54 ms jitter, 126.78 ms fiber floor, and 48.9% efficiency across AS203314. Updated 2026-08-10.

🇿🇦 This page compares the published ping and round-trip time (RTT) from Johannesburg (JNB) to 🇺🇸 Miami (MIA) with vacuum and optical-fiber physical limits.

As of August 10, 2026, the Johannesburg → Miami route on Hats Network averages 259.3 ms RTT across a 50-sample daily ICMP echo measurement round, 2.05× the theoretical fiber-floor limit of 126.78 ms.

Among the 19 measured routes departing Johannesburg, this route ranks 10th fastest by average RTT.

With a stdev-to-average ratio of 1.7%, this route is more stable than the network median of 3.1%. Across the round, per-probe RTT ranged from 254.52 ms to 274.01 ms with a standard deviation of 4.41 ms.

Latency Summary

Metric	Value
RTT	259.3 ms
Jitter	3.54 ms
Packet Loss	0%
Standard Fiber Floor	126.78 ms
Fiber Efficiency	48.9%
Latency Tier	High
Source Region	Africa
Destination Region	North America

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: JNB → MIA

50 ICMP echo samples at 100 ms intervals · round 2026-08-10 · avg 259.3 ± 0.62 ms (SE)

Sample distribution: box = interquartile range (256.2–261.8 ms), median 257.8 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 (126.8 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	256.81
2	100	258.03
3	200	256.57
4	300	270.28
5	400	260.59
6	500	257.46
7	600	258.12
8	700	255.94
9	800	255.37
10	900	261.98
11	1000	257.35
12	1100	266.56
13	1200	259.88
14	1300	267.86
15	1400	261.96
16	1500	259.33
17	1600	259.47
18	1700	261.26
19	1800	263.09
20	1900	257.56
21	2000	255.52
22	2100	254.62
23	2200	255.02
24	2300	256.18
25	2400	258.92
26	2500	270.34
27	2600	274.01
28	2700	262.07
29	2800	256.88
30	2900	257.09
31	3000	262.50
32	3100	265.24
33	3200	259.69
34	3300	256.21
35	3400	255.80
36	3500	254.76
37	3600	262.18
38	3700	262.32
39	3800	258.04
40	3900	255.66
41	4000	259.48
42	4100	259.12
43	4200	257.42
44	4300	255.27
45	4400	256.92
46	4500	255.21
47	4600	256.36
48	4700	256.87
49	4800	255.31
50	4900	254.52

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 Johannesburg (-26.20227, 28.04363) and Miami (25.77427, -80.19366). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	12,945.8 km
Vacuum RTT floor	86.36 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	126.78 ms
Low-latency fiber material floor	126.27 ms
Engineering floor (5% path allowance)	133.13 ms
Research 1.33× mapped-fiber reference	168.61 ms
Estimated unamplified path loss	2718.6 dB
Transparent optical spans / inline amplifiers	170 / 169
Published RTT inflation over fiber floor	2.05×

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 (2026-08-10) collected 50 ICMP echo samples on this route. Distribution statistics from that round:

Round Statistic	Value
Minimum RTT	254.52 ms
Average RTT	259.3 ms
Maximum RTT	274.01 ms
Standard deviation	4.41 ms
Stdev / average	1.7%

RTT trend

Estimated route stability across the selected time window.

Average: 259.6 ms
Minimum: 257.3 ms
Maximum: 262.2 ms
Average loss: 0.01%

Route Context

Departure PoP: Johannesburg (JNB)
Destination PoP: Miami (MIA)
Region overview: Africa → North America
Full global matrix: Backbone Latency Matrix
Physical methodology: Theoretical Fiber Latency

Reverse direction

Miami to Johannesburg latency and RTT — 259.4 ms

Fastest routes departing Johannesburg (JNB)

Johannesburg to London latency and RTT — 158 ms
Johannesburg to Amsterdam latency and RTT — 163.2 ms
Johannesburg to Paris latency and RTT — 164.4 ms
Johannesburg to Frankfurt latency and RTT — 166 ms
Johannesburg to Marseille latency and RTT — 172 ms

Fastest routes arriving at Miami (MIA)

Ashburn to Miami latency and RTT — 28.3 ms
New York to Miami latency and RTT — 34.1 ms
São Paulo to Miami latency and RTT — 74 ms
Los Angeles to Miami latency and RTT — 85.3 ms
Seattle to Miami latency and RTT — 88.1 ms

Same corridor (Africa → North America)

Johannesburg to New York latency and RTT — 221.6 ms
Johannesburg to Ashburn latency and RTT — 228.5 ms
Johannesburg to Seattle latency and RTT — 280.3 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/jnb-mia.pings.{csv,json,yaml}. When citing, include the route, the measurement round date, and the dataset version — for example: "Hats Network latency dataset, Johannesburg → Miami round 2026-08-10, CC BY 4.0".

Data auto-generated on August 10, 2026. Explore the full interactive latency matrix or browse more city-pair routes.

Johannesburg to Miami Latency, Ping & RTT | AS203314