São Paulo to Seattle ping and RTT: 155.5 ms, 4.93 ms jitter, 106.76 ms fiber floor, and 68.7% efficiency across AS203314. Updated 2026-08-09.

🇧🇷 This page compares the published ping and round-trip time (RTT) from São Paulo (GRU) to 🇺🇸 Seattle (SEA) with vacuum and optical-fiber physical limits.

As of August 9, 2026, the São Paulo → Seattle route on Hats Network averages 155.5 ms RTT across a 50-sample daily ICMP echo measurement round, 1.46× the theoretical fiber-floor limit of 106.76 ms.

Among the 19 measured routes departing São Paulo, this route ranks 5th fastest by average RTT.

With a stdev-to-average ratio of 3.3%, this route sits close to the network-wide stability median of 3.4%. Across the round, per-probe RTT ranged from 148.64 ms to 173.8 ms with a standard deviation of 5.2 ms.

Latency Summary

Metric	Value
RTT	155.5 ms
Jitter	4.93 ms
Packet Loss	0%
Standard Fiber Floor	106.76 ms
Fiber Efficiency	68.7%
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 2026-08-09 · avg 155.5 ± 0.74 ms (SE)

Sample distribution: box = interquartile range (152.0–157.6 ms), median 154.0 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	155.67
2	100	155.19
3	200	153.20
4	300	152.39
5	400	150.63
6	500	163.12
7	600	156.74
8	700	151.86
9	800	154.06
10	900	164.08
11	1000	157.65
12	1100	157.46
13	1200	152.96
14	1300	160.35
15	1400	153.91
16	1500	158.38
17	1600	152.29
18	1700	150.45
19	1800	152.17
20	1900	149.67
21	2000	161.96
22	2100	164.40
23	2200	159.25
24	2300	155.57
25	2400	168.80
26	2500	156.35
27	2600	155.83
28	2700	150.91
29	2800	149.46
30	2900	161.83
31	3000	154.53
32	3100	151.93
33	3200	149.97
34	3300	153.23
35	3400	153.77
36	3500	151.98
37	3600	153.21
38	3700	151.84
39	3800	159.26
40	3900	156.74
41	4000	152.01
42	4100	153.89
43	4200	152.35
44	4300	173.80
45	4400	162.69
46	4500	154.37
47	4600	150.42
48	4700	149.38
49	4800	148.64
50	4900	154.40

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 (2026-08-09) collected 50 ICMP echo samples on this route. Distribution statistics from that round:

Round Statistic	Value
Minimum RTT	148.64 ms
Average RTT	155.5 ms
Maximum RTT	173.8 ms
Standard deviation	5.2 ms
Stdev / average	3.3%

RTT trend

Estimated route stability across the selected time window.

Average: 155.6 ms
Minimum: 153.9 ms
Maximum: 157.0 ms
Average loss: 0.01%

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 — 155.8 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 — 131.3 ms
São Paulo to London latency and RTT — 174.6 ms

Fastest routes arriving at Seattle (SEA)

Los Angeles to Seattle latency and RTT — 27 ms
New York to Seattle latency and RTT — 59.2 ms
Ashburn to Seattle latency and RTT — 62.3 ms
Miami to Seattle latency and RTT — 81.5 ms
Tokyo to Seattle latency and RTT — 85.1 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/gru-sea.pings.{csv,json,yaml}. When citing, include the route, the measurement round date, and the dataset version — for example: "Hats Network latency dataset, São Paulo → Seattle round 2026-08-09, CC BY 4.0".

Data auto-generated on August 9, 2026. Explore the full interactive latency matrix or browse more city-pair routes.

São Paulo to Seattle Latency, Ping & RTT | AS203314