Paris to Seattle Latency, Ping & RTT | AS203314
Paris to Seattle ping and RTT: 129 ms, 1.02 ms jitter, 78.98 ms fiber floor, and 61.2% efficiency across AS203314. Updated 2026-07-19.
🇫🇷 This page compares the published ping and round-trip time (RTT) from Paris (PAR) to 🇺🇸 Seattle (SEA) with vacuum and optical-fiber physical limits.
Latency Summary
| Metric | Value |
|---|---|
| RTT | 129 ms |
| Jitter | 1.02 ms |
| Packet Loss | 0.09% |
| Standard Fiber Floor | 78.98 ms |
| Fiber Efficiency | 61.2% |
| Latency Tier | Good |
| Source Region | Europe |
| Destination Region | North America |
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 () | 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 following estimated indicators summarize route stability for the current publication period and are intended for comparative planning rather than SLA evaluation.
| Stability Indicator | Value |
|---|---|
| Minimum RTT | 127.9 ms |
| Median RTT (p50) | 128.9 ms |
| 95th percentile RTT (p95) | 130.4 ms |
| Maximum RTT | 131 ms |
| Jitter | 1.02 ms |
| Packet loss | 0.09% |
RTT trend
Estimated route stability across the selected time window.
- Average
- 128.8 ms
- Minimum
- 127.7 ms
- Maximum
- 130.0 ms
- Average loss
- 0.03%
Route Context
- Departure PoP: Paris (PAR)
- Destination PoP: Seattle (SEA)
- Region overview: Europe → North America
- Full global matrix: Backbone Latency Matrix
- Physical methodology: Theoretical Fiber Latency
Related City-Pair Routes
- Reverse direction: Seattle to Paris latency and RTT — 130.3 ms
- Paris to London latency and RTT — 6.3 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 — 15.4 ms
About This Measurement
Published RTT reflects best-case backbone path behavior. End-user latency also depends on local access networks, congestion, routing policy, and traffic engineering. Stability indicators are comparative estimates, and none of these values is an SLA.
Data auto-generated on July 19, 2026. Explore the full interactive latency matrix or browse more city-pair routes.