Marseille to Seattle Latency, Ping & RTT | AS203314
Marseille to Seattle ping and RTT: 139.7 ms, 1.13 ms jitter, 85.27 ms fiber floor, and 61% efficiency across AS203314. Updated 2026-07-19.
🇫🇷 This page compares the published ping and round-trip time (RTT) from Marseille (MRS) to 🇺🇸 Seattle (SEA) with vacuum and optical-fiber physical limits.
Latency Summary
| Metric | Value |
|---|---|
| RTT | 139.7 ms |
| Jitter | 1.13 ms |
| Packet Loss | 0.15% |
| Standard Fiber Floor | 85.27 ms |
| Fiber Efficiency | 61% |
| Latency Tier | Good |
| Source Region | Europe |
| Destination Region | North America |
Theoretical Fiber Latency
The public physical reference uses the GeoNames city centres for Marseille (43.29695, 5.38107) and Seattle (47.60621, -122.33207). It does not disclose either facility address.
| Physical Reference | Value |
|---|---|
| WGS-84 geodesic distance | 8,707.5 km |
| Vacuum RTT floor | 58.09 ms |
| Standard fiber RTT floor () | 85.27 ms |
| Low-latency fiber material floor | 84.93 ms |
| Engineering floor (5% path allowance) | 89.55 ms |
| Research 1.33× mapped-fiber reference | 113.41 ms |
| Estimated unamplified path loss | 1828.6 dB |
| Transparent optical spans / inline amplifiers | 115 / 114 |
| Published RTT inflation over fiber floor | 1.64× |
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 | 138.4 ms |
| Median RTT (p50) | 139.6 ms |
| 95th percentile RTT (p95) | 141.6 ms |
| Maximum RTT | 141.9 ms |
| Jitter | 1.13 ms |
| Packet loss | 0.15% |
RTT trend
Estimated route stability across the selected time window.
- Average
- 139.7 ms
- Minimum
- 138.4 ms
- Maximum
- 141.2 ms
- Average loss
- 0.01%
Route Context
- Departure PoP: Marseille (MRS)
- 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 Marseille latency and RTT — 139.5 ms
- Marseille to Paris latency and RTT — 8.9 ms
- Marseille to London latency and RTT — 16.8 ms
- Marseille to Frankfurt latency and RTT — 16.9 ms
- Marseille to Amsterdam latency and RTT — 19.6 ms
- Marseille to Berlin latency and RTT — 21.6 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.