ICMP round-trip time measurements from Seattle, USA to São Paulo, Brazil: average 155.1 ms, 0% loss, and jitter data. Explore raw latency statistics.

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

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

The 2026-08-15T04:03:13Z ICMP echo RTT test from Seattle to São Paulo averaged 155.1 ms across 50 samples, with a 145.34 ms minimum, 178.16 ms maximum, and zero packet loss.

The 10,902.3 km geodesic distance corresponds to a fiber-floor estimate of about 106.76 ms, so the measured average is 1.45 times that floor, for a fiber efficiency of roughly 68.8%. The 32.8 ms gap between minimum and maximum is reflected in the 6.86 ms jitter figure, though the 7.5 ms standard deviation remains moderate for such a long haul.

This route ranks 15th out of 19 outbound routes from this source by typical latency, and its spread is wider relative to the average than the network-wide median variability of 3.08%. With zero loss and a 'Fair' latency tier, the route is more variable than the best outbound options from this source, and best-case samples sit nearly 10 ms below the average.

Latency Summary

Metric	Value
RTT	155.1 ms
Jitter	6.86 ms
Packet Loss	0%
Standard Fiber Floor	106.76 ms
Fiber Efficiency	68.8%
Latency Tier	Fair
Source Region	North America
Destination Region	South 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: SEA → GRU

50 ICMP echo samples at 100 ms intervals · round 2026-08-15T04:03:13Z · avg 155.1 ± 1.06 ms (SE)

Sample distribution: box = interquartile range (149.5–159.3 ms), median 152.9 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 (106.8 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	145.34
2	100	154.11
3	200	149.09
4	300	146.51
5	400	169.31
6	500	156.84
7	600	150.76
8	700	147.95
9	800	152.03
10	900	147.94
11	1000	146.25
12	1100	145.41
13	1200	147.33
14	1300	153.24
15	1400	158.55
16	1500	159.61
17	1600	151.68
18	1700	171.46
19	1800	156.84
20	1900	150.06
21	2000	160.47
22	2100	167.59
23	2200	152.94
24	2300	152.09
25	2400	155.77
26	2500	151.40
27	2600	148.28
28	2700	165.30
29	2800	160.33
30	2900	167.25
31	3000	162.74
32	3100	152.91
33	3200	153.98
34	3300	148.11
35	3400	167.80
36	3500	154.23
37	3600	155.42
38	3700	153.05
39	3800	149.96
40	3900	149.33
41	4000	148.88
42	4100	149.27
43	4200	154.85
44	4300	151.24
45	4400	178.16
46	4500	167.26
47	4600	159.70
48	4700	150.59
49	4800	152.92
50	4900	152.87

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 Seattle (47.60621, -122.33207) and São Paulo (-23.54750, -46.63611). 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	1.45×

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	145.34 ms
Average RTT	155.1 ms
Maximum RTT	178.16 ms
Standard deviation	7.5 ms
Stdev / average	4.8%

RTT trend

Estimated route stability across the selected time window.

Average: 155.3 ms
Minimum: 154.4 ms
Maximum: 156.6 ms
Average loss: 0.03%

Route Context

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

Reverse direction

São Paulo to Seattle latency and RTT — 156 ms

Fastest routes departing Seattle (SEA)

Seattle to Los Angeles latency and RTT — 26.6 ms
Seattle to New York latency and RTT — 59 ms
Seattle to Ashburn latency and RTT — 62 ms
Seattle to Miami latency and RTT — 81.1 ms
Seattle to Tokyo latency and RTT — 84.8 ms

Fastest routes arriving at São Paulo (GRU)

Ashburn to São Paulo latency and RTT — 102.6 ms
New York to São Paulo latency and RTT — 108.3 ms
Miami to São Paulo latency and RTT — 129.9 ms
Los Angeles to São Paulo latency and RTT — 131.1 ms
London to São Paulo latency and RTT — 171.8 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/sea-gru.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Seattle → São Paulo 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.

Seattle, USA → São Paulo, Brazil RTT