ICMP RTT measurements from Amsterdam, Netherlands to Seattle, USA: average latency, jitter, packet loss, and route efficiency.

🇳🇱 Amsterdam, Netherlands (AMS) → 🇺🇸 Seattle, USA (SEA)

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

The ICMP RTT round 2026-08-16T04:07:28Z sampled Amsterdam, Netherlands to Seattle, USA with 50 echo requests at 100 ms intervals; the average round-trip time was 130.2 ms, with a minimum of 123.59 ms and a maximum of 144.11 ms.

All 50 packets were returned, so packet loss was 0%, but the path showed more variability: the standard deviation was 5.22 ms and jitter was 4.46 ms, producing a spread of about 20.5 ms between the fastest and slowest samples. In the set of 19 outbound routes measured from Amsterdam for this round, this route ranked 10th by average latency; its standard deviation is about 4.0% of its average, slightly above the median route's 3.28% ratio.

The geodesic distance is 7,848.5 km, corresponding to a vacuum floor of 52.36 ms and a fiber floor of 76.86 ms. The measured average is 1.69 times the fiber floor, or about 59% fiber efficiency, meaning the actual round-trip time is markedly above the ideal fiber transit estimate.

With zero packet loss and a 20.5 ms spread between the fastest and slowest samples, this route's ICMP behavior is stable in availability but variable in value; a single ping may land near either end of the observed range.

Latency Summary

Metric	Value
RTT	130.2 ms
Jitter	4.46 ms
Packet Loss	0%
Standard Fiber Floor	76.86 ms
Fiber Efficiency	59%
Latency Tier	Good
Source Region	Europe
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: AMS → SEA

50 ICMP echo samples at 100 ms intervals · round 2026-08-16T04:07:28Z · avg 130.2 ± 0.74 ms (SE)

Sample distribution: box = interquartile range (126.0–132.8 ms), median 129.4 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 (76.9 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	124.71
2	100	130.48
3	200	132.68
4	300	126.94
5	400	124.55
6	500	124.77
7	600	126.70
8	700	133.34
9	800	139.76
10	900	131.20
11	1000	128.27
12	1100	133.32
13	1200	142.30
14	1300	138.78
15	1400	132.04
16	1500	131.04
17	1600	131.22
18	1700	126.14
19	1800	125.80
20	1900	128.74
21	2000	127.23
22	2100	124.66
23	2200	123.59
24	2300	127.92
25	2400	129.92
26	2500	128.62
27	2600	125.53
28	2700	127.03
29	2800	128.18
30	2900	144.11
31	3000	130.20
32	3100	132.82
33	3200	133.48
34	3300	126.57
35	3400	124.81
36	3500	123.65
37	3600	137.86
38	3700	132.65
39	3800	143.85
40	3900	132.03
41	4000	125.95
42	4100	124.02
43	4200	133.24
44	4300	131.46
45	4400	133.63
46	4500	136.42
47	4600	129.16
48	4700	129.71
49	4800	125.24
50	4900	123.68

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 Amsterdam (52.37403, 4.88969) and Seattle (47.60621, -122.33207). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	7,848.5 km
Vacuum RTT floor	52.36 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	76.86 ms
Low-latency fiber material floor	76.55 ms
Engineering floor (5% path allowance)	80.71 ms
Research 1.33× mapped-fiber reference	102.22 ms
Estimated unamplified path loss	1648.2 dB
Transparent optical spans / inline amplifiers	104 / 103
Published RTT inflation over fiber floor	1.69×

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	123.59 ms
Average RTT	130.2 ms
Maximum RTT	144.11 ms
Standard deviation	5.22 ms
Stdev / average	4.0%

RTT trend

Estimated route stability across the selected time window.

Average: 130.1 ms
Minimum: 128.8 ms
Maximum: 130.8 ms
Average loss: 0.03%

Route Context

Departure PoP: Amsterdam (AMS)
Destination PoP: Seattle (SEA)
Region overview: Europe → North America
Corridor overview: Europe to North America
Full global matrix: Backbone Latency Matrix
Physical methodology: Theoretical Fiber Latency

Reverse direction

Seattle to Amsterdam latency and RTT — 128.6 ms

Fastest routes departing Amsterdam (AMS)

Amsterdam to London latency and RTT — 5.2 ms
Amsterdam to Frankfurt latency and RTT — 5.9 ms
Amsterdam to Paris latency and RTT — 7 ms
Amsterdam to Berlin latency and RTT — 7.2 ms
Amsterdam to Marseille latency and RTT — 19.6 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

Same corridor (Europe → North America)

London to New York latency and RTT — 63.8 ms
Amsterdam to New York latency and RTT — 68.6 ms
Paris to New York latency and RTT — 68.9 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/ams-sea.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Amsterdam → 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.

Amsterdam, Netherlands → Seattle, USA RTT