Seattle to Paris ping and RTT: 130.2 ms, 2.37 ms jitter, 78.98 ms fiber floor, and 60.7% efficiency across AS203314. Updated 2026-08-09.

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

As of August 9, 2026, the Seattle → Paris route on Hats Network averages 130.2 ms RTT across a 50-sample daily ICMP echo measurement round (source: RETN), 1.65× the theoretical fiber-floor limit of 78.98 ms.

Among the 19 measured routes departing Seattle, this route ranks 9th fastest by average RTT.

With a stdev-to-average ratio of 1.9%, this route is more stable than the network median of 3.4%. Across the round, per-probe RTT ranged from 126.94 ms to 137.39 ms with a standard deviation of 2.45 ms.

Latency Summary

Metric	Value
RTT	130.2 ms
Jitter	2.37 ms
Packet Loss	0%
Standard Fiber Floor	78.98 ms
Fiber Efficiency	60.7%
Latency Tier	Good
Source Region	North America
Destination Region	Europe

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 → PAR

50 ICMP echo samples at 100 ms intervals · round 2026-08-09 · avg 130.2 ± 0.35 ms (SE)

Sample distribution: box = interquartile range (128.5–131.1 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 (79.0 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	132.09
2	100	131.35
3	200	129.22
4	300	128.83
5	400	128.99
6	500	130.25
7	600	133.66
8	700	130.29
9	800	129.42
10	900	128.42
11	1000	132.90
12	1100	129.08
13	1200	135.58
14	1300	130.29
15	1400	128.25
16	1500	128.25
17	1600	130.63
18	1700	127.89
19	1800	127.20
20	1900	129.13
21	2000	127.68
22	2100	127.65
23	2200	129.14
24	2300	129.04
25	2400	127.97
26	2500	129.90
27	2600	127.69
28	2700	126.94
29	2800	129.73
30	2900	131.10
31	3000	128.44
32	3100	128.18
33	3200	133.32
34	3300	135.07
35	3400	129.94
36	3500	128.98
37	3600	129.39
38	3700	132.77
39	3800	137.39
40	3900	131.43
41	4000	128.66
42	4100	128.79
43	4200	131.11
44	4300	129.25
45	4400	137.06
46	4500	130.50
47	4600	129.36
48	4700	129.35
49	4800	128.30
50	4900	134.15

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 Paris (48.85341, 2.34880). 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	1.65×

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	126.94 ms
Average RTT	130.2 ms
Maximum RTT	137.39 ms
Standard deviation	2.45 ms
Stdev / average	1.9%

RTT trend

Estimated route stability across the selected time window.

Average: 130.2 ms
Minimum: 129.2 ms
Maximum: 131.5 ms
Average loss: 0.03%

Route Context

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

Reverse direction

Paris to Seattle latency and RTT — 128.4 ms

Fastest routes departing Seattle (SEA)

Seattle to Los Angeles latency and RTT — 26.8 ms
Seattle to New York latency and RTT — 58.7 ms
Seattle to Ashburn latency and RTT — 61.8 ms
Seattle to Miami latency and RTT — 81.8 ms
Seattle to Tokyo latency and RTT — 84.6 ms

Fastest routes arriving at Paris (PAR)

London to Paris latency and RTT — 6.4 ms
Amsterdam to Paris latency and RTT — 7 ms
Frankfurt to Paris latency and RTT — 7.6 ms
Marseille to Paris latency and RTT — 8.9 ms
Berlin to Paris latency and RTT — 14.7 ms

Same corridor (North America → Europe)

New York to London latency and RTT — 64.3 ms
New York to Paris latency and RTT — 68.4 ms
New York to Amsterdam latency and RTT — 68.7 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-par.pings.{csv,json,yaml}. When citing, include the route, the measurement round date, and the dataset version — for example: "Hats Network latency dataset, Seattle → Paris 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.

Seattle to Paris Latency, Ping & RTT | AS203314