ICMP RTT for New York, USA to Johannesburg, South Africa: average latency, jitter, packet loss, and route variability from the 2026-08-16 measurement round.

🇺🇸 New York, USA (NYC) → 🇿🇦 Johannesburg, South Africa (JNB)

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

The 2026-08-16T04:07:28Z round of ICMP echo RTT measurements from New York, USA to Johannesburg, South Africa used 50 samples at a 100 ms interval. The round-trip time averaged 221.5 ms, with a minimum of 209.09 ms, a maximum of 252.44 ms, and a standard deviation of 9.18 ms; jitter was 8.44 ms and packet loss was 0%.

By distance, New York and Johannesburg are about 12,832.9 km apart along the great circle. A direct fiber path for that separation would have a theoretical round-trip floor of 125.67 ms, so the measured average is 1.76 times that floor and the route is operating at 56.7% fiber efficiency. The 85.61 ms vacuum floor provides the absolute lower bound if light could travel in a straight line with no medium.

In the 19-city-pair set sharing this measurement direction, the route ranked 19th by average RTT, the highest-latency member of that set. Its standard deviation equals about 4.1% of the average, above the 3.28% median variability seen across the network's measured routes, though zero loss and a 0.0% packet loss figure show the path remained usable throughout the sample.

The Fair latency tier fits this profile: high average RTT for an intercontinental link, but no dropped probes and a jitter value below 10 ms. Because the route is already last among the measured pairs for average latency, the most useful future signal is a reduction in the 1.76x inflation over the fiber floor; small changes in jitter alone would not materially change its position.

Latency Summary

Metric	Value
RTT	221.5 ms
Jitter	8.44 ms
Packet Loss	0%
Standard Fiber Floor	125.67 ms
Fiber Efficiency	56.7%
Latency Tier	Fair
Source Region	North America
Destination Region	Africa

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 → JNB

50 ICMP echo samples at 100 ms intervals · round 2026-08-16T04:07:28Z · avg 221.5 ± 1.30 ms (SE)

Sample distribution: box = interquartile range (213.9–225.5 ms), median 219.8 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 (125.7 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	221.66
2	100	212.21
3	200	210.60
4	300	218.30
5	400	219.94
6	500	213.11
7	600	229.31
8	700	227.22
9	800	226.94
10	900	252.44
11	1000	240.71
12	1100	220.98
13	1200	218.44
14	1300	211.22
15	1400	217.91
16	1500	215.27
17	1600	220.76
18	1700	226.59
19	1800	229.57
20	1900	214.89
21	2000	220.84
22	2100	219.13
23	2200	213.60
24	2300	212.85
25	2400	239.08
26	2500	218.04
27	2600	232.60
28	2700	240.42
29	2800	224.00
30	2900	222.75
31	3000	220.54
32	3100	218.31
33	3200	235.64
34	3300	220.77
35	3400	212.97
36	3500	222.89
37	3600	239.31
38	3700	218.03
39	3800	212.62
40	3900	209.09
41	4000	212.23
42	4100	221.21
43	4200	212.55
44	4300	219.68
45	4400	213.73
46	4500	219.42
47	4600	221.15
48	4700	226.02
49	4800	213.08
50	4900	214.38

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 Johannesburg (-26.20227, 28.04363). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	12,832.9 km
Vacuum RTT floor	85.61 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	125.67 ms
Low-latency fiber material floor	125.16 ms
Engineering floor (5% path allowance)	131.97 ms
Research 1.33× mapped-fiber reference	167.14 ms
Estimated unamplified path loss	2694.9 dB
Transparent optical spans / inline amplifiers	169 / 168
Published RTT inflation over fiber floor	1.76×

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	209.09 ms
Average RTT	221.5 ms
Maximum RTT	252.44 ms
Standard deviation	9.18 ms
Stdev / average	4.1%

RTT trend

Estimated route stability across the selected time window.

Average: 221.3 ms
Minimum: 219.3 ms
Maximum: 223.2 ms
Average loss: 0.02%

Route Context

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

Reverse direction

Johannesburg to New York latency and RTT — 221.8 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 London latency and RTT — 63.5 ms

Fastest routes arriving at Johannesburg (JNB)

Amsterdam to Johannesburg latency and RTT — 171.9 ms
Berlin to Johannesburg latency and RTT — 172.1 ms
London to Johannesburg latency and RTT — 179.6 ms
Paris to Johannesburg latency and RTT — 180.9 ms
Frankfurt to Johannesburg latency and RTT — 188.4 ms

Same corridor (North America → Africa)

Ashburn to Johannesburg latency and RTT — 228.3 ms
Miami to Johannesburg latency and RTT — 259.8 ms
Seattle to Johannesburg latency and RTT — 282.1 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-jnb.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 → Johannesburg 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 → Johannesburg, South Africa RTT