ICMP echo RTT between São Paulo, Brazil and Seattle, USA: 155.9ms average, zero packet loss, jitter, and route efficiency.

🇧🇷 São Paulo, Brazil (GRU) → 🇺🇸 Seattle, USA (SEA)

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

In the 2026-08-16T04:07:28Z measurement round, ICMP echo RTT from São Paulo, Brazil to Seattle, USA averaged 155.9ms over 50 samples, with a minimum of 151.12ms and a maximum of 166.61ms. Jitter was 3.4ms, standard deviation 3.7ms, and packet loss was zero.

The 155.9ms average is 46% above the theoretical fiber floor of 106.76ms for the 10,902.3km great-circle distance, giving a fiber efficiency of 68.5%. Despite the Fair latency tier, the path shows a stable distribution and no loss.

This path ranks fifth among the 19 outbound routes in the round, and its variability ratio of about 2.4% is well below the network median of 3.28%. The low relative variation is noteworthy for such a long hop, making the route a consistent performer despite its higher absolute latency.

Latency Summary

Metric	Value
RTT	155.9 ms
Jitter	3.4 ms
Packet Loss	0%
Standard Fiber Floor	106.76 ms
Fiber Efficiency	68.5%
Latency Tier	Fair
Source Region	South America
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: GRU → SEA

50 ICMP echo samples at 100 ms intervals · round 2026-08-16T04:07:28Z · avg 155.9 ± 0.52 ms (SE)

Sample distribution: box = interquartile range (153.0–158.0 ms), median 155.1 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 (106.8 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	151.12
2	100	156.08
3	200	162.07
4	300	155.56
5	400	154.40
6	500	151.92
7	600	153.79
8	700	151.77
9	800	163.19
10	900	155.04
11	1000	154.24
12	1100	151.91
13	1200	153.53
14	1300	152.99
15	1400	156.59
16	1500	155.47
17	1600	152.56
18	1700	152.20
19	1800	163.43
20	1900	157.34
21	2000	154.08
22	2100	151.66
23	2200	153.08
24	2300	152.10
25	2400	166.61
26	2500	157.02
27	2600	155.58
28	2700	155.86
29	2800	160.44
30	2900	159.17
31	3000	153.53
32	3100	154.21
33	3200	152.32
34	3300	152.61
35	3400	151.46
36	3500	154.85
37	3600	162.18
38	3700	161.63
39	3800	158.19
40	3900	158.60
41	4000	154.16
42	4100	151.57
43	4200	155.07
44	4300	153.11
45	4400	157.28
46	4500	156.86
47	4600	158.29
48	4700	159.84
49	4800	157.17
50	4900	161.27

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 São Paulo (-23.54750, -46.63611) and Seattle (47.60621, -122.33207). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	10,902.3 km
Vacuum RTT floor	72.73 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	106.76 ms
Low-latency fiber material floor	106.33 ms
Engineering floor (5% path allowance)	112.12 ms
Research 1.33× mapped-fiber reference	142 ms
Estimated unamplified path loss	2289.5 dB
Transparent optical spans / inline amplifiers	144 / 143
Published RTT inflation over fiber floor	1.46×

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	151.12 ms
Average RTT	155.9 ms
Maximum RTT	166.61 ms
Standard deviation	3.7 ms
Stdev / average	2.4%

RTT trend

Estimated route stability across the selected time window.

Average: 155.9 ms
Minimum: 154.6 ms
Maximum: 157.2 ms
Average loss: 0.04%

Route Context

Departure PoP: São Paulo (GRU)
Destination PoP: Seattle (SEA)
Region overview: South America → North America
Full global matrix: Backbone Latency Matrix
Physical methodology: Theoretical Fiber Latency

Reverse direction

Seattle to São Paulo latency and RTT — 155.7 ms

Fastest routes departing São Paulo (GRU)

São Paulo to Miami latency and RTT — 74 ms
São Paulo to New York latency and RTT — 122 ms
São Paulo to Ashburn latency and RTT — 128 ms
São Paulo to Los Angeles latency and RTT — 130.8 ms
São Paulo to London latency and RTT — 175.8 ms

Fastest routes arriving at Seattle (SEA)

Los Angeles to Seattle latency and RTT — 26.9 ms
New York to Seattle latency and RTT — 58.7 ms
Ashburn to Seattle latency and RTT — 62.3 ms
Miami to Seattle latency and RTT — 81.9 ms
Tokyo to Seattle latency and RTT — 84.8 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/gru-sea.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, São Paulo → Seattle 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.

São Paulo, Brazil → Seattle, USA RTT