Paris to Seattle ping and RTT: 128.4 ms, 3.21 ms jitter, 78.98 ms fiber floor, and 61.5% efficiency across AS203314. Updated 2026-08-09.

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

As of August 9, 2026, the Paris → Seattle route on Hats Network averages 128.4 ms RTT across a 50-sample daily ICMP echo measurement round (source: RETN), 1.63× the theoretical fiber-floor limit of 78.98 ms.

Among the 19 measured routes departing Paris, this route ranks 10th fastest by average RTT.

With a stdev-to-average ratio of 3.0%, this route sits close to the network-wide stability median of 3.4%. Across the round, per-probe RTT ranged from 124.61 ms to 143.62 ms with a standard deviation of 3.8 ms.

Latency Summary

Metric	Value
RTT	128.4 ms
Jitter	3.21 ms
Packet Loss	0%
Standard Fiber Floor	78.98 ms
Fiber Efficiency	61.5%
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: PAR → SEA

50 ICMP echo samples at 100 ms intervals · round 2026-08-09 · avg 128.4 ± 0.54 ms (SE)

Sample distribution: box = interquartile range (125.7–130.0 ms), median 127.0 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 (79.0 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	129.06
2	100	125.56
3	200	124.99
4	300	128.10
5	400	126.64
6	500	124.77
7	600	136.99
8	700	130.47
9	800	127.06
10	900	126.94
11	1000	126.95
12	1100	127.19
13	1200	129.95
14	1300	132.07
15	1400	129.24
16	1500	126.81
17	1600	125.63
18	1700	124.61
19	1800	127.86
20	1900	125.41
21	2000	126.05
22	2100	124.64
23	2200	126.03
24	2300	124.61
25	2400	132.48
26	2500	130.02
27	2600	127.26
28	2700	125.27
29	2800	130.39
30	2900	126.82
31	3000	132.36
32	3100	126.91
33	3200	126.36
34	3300	126.32
35	3400	127.08
36	3500	125.14
37	3600	125.12
38	3700	127.21
39	3800	125.95
40	3900	124.74
41	4000	133.19
42	4100	143.62
43	4200	136.87
44	4300	129.95
45	4400	133.41
46	4500	130.43
47	4600	126.92
48	4700	134.29
49	4800	128.72
50	4900	125.54

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 Paris (48.85341, 2.34880) and Seattle (47.60621, -122.33207). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	8,065.2 km
Vacuum RTT floor	53.8 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	78.98 ms
Low-latency fiber material floor	78.66 ms
Engineering floor (5% path allowance)	82.94 ms
Research 1.33× mapped-fiber reference	105.04 ms
Estimated unamplified path loss	1693.7 dB
Transparent optical spans / inline amplifiers	106 / 105
Published RTT inflation over fiber floor	1.63×

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	124.61 ms
Average RTT	128.4 ms
Maximum RTT	143.62 ms
Standard deviation	3.8 ms
Stdev / average	3.0%

RTT trend

Estimated route stability across the selected time window.

Average: 128.3 ms
Minimum: 127.0 ms
Maximum: 129.5 ms
Average loss: 0.02%

Route Context

Departure PoP: Paris (PAR)
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 Paris latency and RTT — 130.2 ms

Fastest routes departing Paris (PAR)

Paris to London latency and RTT — 6.4 ms
Paris to Amsterdam latency and RTT — 7 ms
Paris to Frankfurt latency and RTT — 7.6 ms
Paris to Marseille latency and RTT — 8.9 ms
Paris to Berlin latency and RTT — 13.9 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

Same corridor (Europe → North America)

London to New York latency and RTT — 64 ms
Amsterdam to New York latency and RTT — 69.3 ms
Paris to New York latency and RTT — 69.3 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/par-sea.pings.{csv,json,yaml}. When citing, include the route, the measurement round date, and the dataset version — for example: "Hats Network latency dataset, Paris → 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.

Paris to Seattle Latency, Ping & RTT | AS203314