Explore Paris, France to Seattle, USA ICMP RTT, jitter, packet loss and fiber latency limits on the AS203314 network. View route data.

🇫🇷 Paris, France (PAR) → 🇺🇸 Seattle, USA (SEA)

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

Paris to Seattle averaged 128 ms across 50 replies. The observed range was 123.76 to 137.5 ms; these figures describe one probe round, not a long-term service target.

Standard deviation was 3.51 ms, or 2.7% of the average. This describes variation within the sample without identifying its cause.

Latency Summary

Metric	Value
RTT	128 ms
Jitter	2.63 ms
Packet Loss	0%
Standard Fiber Floor	78.98 ms
Fiber Efficiency	61.7%
Latency Tier	Good
Source Region	Europe
Destination Region	North America

Ping Measurement Series

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

Ping series: PAR → SEA

50 ICMP echo samples at 100 ms intervals · round 2026-08-16T04:07:28Z · avg 128.0 ± 0.50 ms (SE)

Sample distribution: box = interquartile range (125.1–130.8 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	126.94
2	100	129.90
3	200	126.98
4	300	130.97
5	400	126.23
6	500	136.08
7	600	137.50
8	700	133.04
9	800	126.81
10	900	125.40
11	1000	126.35
12	1100	124.40
13	1200	130.77
14	1300	137.30
15	1400	132.00
16	1500	126.33
17	1600	130.02
18	1700	128.70
19	1800	127.39
20	1900	125.23
21	2000	126.34
22	2100	125.12
23	2200	128.40
24	2300	127.30
25	2400	131.99
26	2500	132.00
27	2600	130.75
28	2700	126.43
29	2800	131.25
30	2900	127.29
31	3000	127.99
32	3100	132.18
33	3200	131.96
34	3300	127.03
35	3400	127.72
36	3500	130.86
37	3600	127.80
38	3700	124.87
39	3800	124.16
40	3900	124.78
41	4000	123.85
42	4100	123.90
43	4200	124.37
44	4300	124.52
45	4400	123.76
46	4500	123.86
47	4600	125.86
48	4700	124.67
49	4800	126.06
50	4900	124.59

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: Paris (48.85341, 2.34880) and Seattle (47.60621, -122.33207). These are not facility coordinates or a surveyed cable path.

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	1.62×

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	123.76 ms
Average RTT	128 ms
Maximum RTT	137.5 ms
Standard deviation	3.51 ms
Stdev / average	2.7%

Estimated RTT trend

Modeled comparison, not historical probe measurements.

Average: 128.0 ms
Minimum: 127.1 ms
Maximum: 129.0 ms
Average loss: 0.03%

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: 129.2 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: 15.5 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

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/par-sea.pings.{csv,json,yaml}. Cite the route, round timestamp and dataset version. Example: "Hats Network latency dataset, Paris → Seattle 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.

Paris, France → Seattle, USA RTT