Sydney to Melbourne Latency, Ping & RTT | AS203314
Sydney to Melbourne ping and RTT: 9.8 ms, 0.12 ms jitter, 6.99 ms fiber floor, and 71.3% efficiency across AS203314. Updated 2026-07-19.
🇦🇺 This page compares the published ping and round-trip time (RTT) from Sydney (SYD) to 🇦🇺 Melbourne (MEL) with vacuum and optical-fiber physical limits.
Latency Summary
| Metric | Value |
|---|---|
| RTT | 9.8 ms |
| Jitter | 0.12 ms |
| Packet Loss | 0.07% |
| Standard Fiber Floor | 6.99 ms |
| Fiber Efficiency | 71.3% |
| Latency Tier | Ultra-Low |
| Source Region | Asia Pacific |
| Destination Region | Asia Pacific |
Theoretical Fiber Latency
The public physical reference uses the GeoNames city centres for Sydney (-33.86785, 151.20732) and Melbourne (-37.81400, 144.96332). It does not disclose either facility address.
| Physical Reference | Value |
|---|---|
| WGS-84 geodesic distance | 713.8 km |
| Vacuum RTT floor | 4.76 ms |
| Standard fiber RTT floor () | 6.99 ms |
| Low-latency fiber material floor | 6.96 ms |
| Engineering floor (5% path allowance) | 7.34 ms |
| Research 1.33× mapped-fiber reference | 9.3 ms |
| Estimated unamplified path loss | 149.9 dB |
| Transparent optical spans / inline amplifiers | 10 / 9 |
| Published RTT inflation over fiber floor | 1.4× |
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 | 9.6 ms |
| Median RTT (p50) | 9.8 ms |
| 95th percentile RTT (p95) | 10 ms |
| Maximum RTT | 10.1 ms |
| Jitter | 0.12 ms |
| Packet loss | 0.07% |
RTT trend
Estimated route stability across the selected time window.
- Average
- 9.8 ms
- Minimum
- 9.7 ms
- Maximum
- 9.9 ms
- Average loss
- 0.02%
Route Context
- Departure PoP: Sydney (SYD)
- Destination PoP: Melbourne (MEL)
- Region overview: Asia Pacific → Asia Pacific
- Full global matrix: Backbone Latency Matrix
- Physical methodology: Theoretical Fiber Latency
Related City-Pair Routes
- Reverse direction: Melbourne to Sydney latency and RTT — 9.8 ms
- Sydney to Singapore latency and RTT — 94.7 ms
- Sydney to Tokyo latency and RTT — 101.8 ms
- Sydney to Hong Kong latency and RTT — 124.7 ms
- Sydney to Taipei latency and RTT — 133.7 ms
- Sydney to Los Angeles latency and RTT — 138.5 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.