Explore Seattle, USA to São Paulo, Brazil ICMP RTT, jitter, packet loss and fiber latency limits on the AS203314 network.

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

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

Seattle to São Paulo averaged 155.7 ms across 50 replies. The observed range was 152.75 to 163 ms; these figures describe one probe round, not a long-term service target.

Standard deviation was 2.37 ms, or 1.5% of the average. This describes variation within the sample without identifying its cause.

Latency Summary

Metric	Value
RTT	155.7 ms
Jitter	2.3 ms
Packet Loss	0%
Standard Fiber Floor	106.76 ms
Fiber Efficiency	68.6%
Latency Tier	Fair
Source Region	North America
Destination Region	South America

Ping Measurement Series

50 ICMP echo probes were recorded in this round. Individual replies and their distribution are shown below.

Ping series: SEA → GRU

50 ICMP echo samples at 100 ms intervals · round 2026-08-16T04:07:28Z · avg 155.7 ± 0.34 ms (SE)

Sample distribution: box = interquartile range (154.1–156.5 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	154.59
2	100	153.39
3	200	157.94
4	300	155.30
5	400	153.80
6	500	153.41
7	600	155.76
8	700	157.56
9	800	161.30
10	900	155.49
11	1000	153.80
12	1100	154.59
13	1200	154.07
14	1300	157.99
15	1400	155.09
16	1500	155.87
17	1600	156.41
18	1700	154.52
19	1800	154.14
20	1900	154.64
21	2000	154.34
22	2100	153.18
23	2200	152.75
24	2300	153.00
25	2400	156.34
26	2500	154.73
27	2600	160.87
28	2700	155.78
29	2800	161.59
30	2900	156.61
31	3000	160.35
32	3100	156.08
33	3200	155.08
34	3300	153.51
35	3400	154.88
36	3500	155.60
37	3600	163.00
38	3700	158.24
39	3800	154.63
40	3900	155.34
41	4000	156.50
42	4100	154.97
43	4200	153.27
44	4300	153.51
45	4400	153.38
46	4500	157.55
47	4600	155.35
48	4700	157.19
49	4800	154.06
50	4900	153.66

Download This Route's Data

Download the probe round as CSV, JSON or YAML under CC BY 4.0. Citation details include the route and round timestamp.

CSV JSON YAML Full dataset

Theoretical Fiber Latency

The propagation model uses public city-centre coordinates from GeoNames: Seattle (47.60621, -122.33207) and São Paulo (-23.54750, -46.63611). These are not facility coordinates or a surveyed cable path.

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×

The span count assumes 80 km optical spans. Attenuation is a power-loss term, not a propagation delay. See the model assumptions and equations.

Stability & Trend

Statistics from the same 50 replies. They describe this probe round, not continuous historical monitoring.

Round Statistic	Value
Minimum RTT	152.75 ms
Average RTT	155.7 ms
Maximum RTT	163 ms
Standard deviation	2.37 ms
Stdev / average	1.5%

Estimated RTT trend

Modeled comparison, not historical probe measurements.

Average: 155.7 ms
Minimum: 154.5 ms
Maximum: 156.9 ms
Average loss: 0.02%

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: 155.9 ms

Fastest routes departing Seattle (SEA)

Seattle to Los Angeles latency and RTT: 25.9 ms
Seattle to New York latency and RTT: 59.5 ms
Seattle to Ashburn latency and RTT: 61.5 ms
Seattle to Miami latency and RTT: 81.7 ms
Seattle to Tokyo latency and RTT: 85 ms

Fastest routes arriving at São Paulo (GRU)

Ashburn to São Paulo latency and RTT: 101.4 ms
New York to São Paulo latency and RTT: 106.9 ms
Miami to São Paulo latency and RTT: 128.7 ms
Los Angeles to São Paulo latency and RTT: 131.3 ms
London to São Paulo latency and RTT: 170.7 ms

About This Measurement

These ICMP measurements cover the two backbone endpoints. Access networks, routing policy and load can change an end user's result. A probe round is not an SLA.

The underlying replies are available 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}. Cite the route, round timestamp and dataset version. Example: "Hats Network latency dataset, Seattle → São Paulo round 2026-08-16T04:07:28Z, CC BY 4.0".

Round published August 16, 2026. See the full interactive latency matrix or browse more city-pair routes.

Seattle, USA → São Paulo, Brazil RTT