London, UK → Melbourne, Australia RTT
Explore London, UK to Melbourne, Australia ICMP RTT, jitter, packet loss and fiber latency limits on the AS203314 network.
🇬🇧 London, UK (LON) → 🇦🇺 Melbourne, Australia (MEL)
Measurement round: 2026-10-20T08:46:17Z.
London–Melbourne averaged 253.9 ms, with a 248.58–272.81 ms range and no lost replies.
RTT was about 1.53 times the fiber reference. Eighteenth place among 19 outbound routes makes Melbourne one of London's two slowest measured destinations.
Latency Summary
| Metric | Value |
|---|---|
| RTT | 253.9 ms |
| Jitter | 3.66 ms |
| Packet Loss | 0% |
| Standard Fiber Floor | 165.48 ms |
| Fiber Efficiency | 65.2% |
| Latency Tier | High |
| Source Region | Europe |
| Destination Region | Asia Pacific |
Ping Measurement Series
50 ICMP echo probes were recorded in this round. Individual replies and their distribution are shown below.
Ping series: LON → MEL
50 ICMP echo samples at 100 ms intervals · round 2026-10-20T08:46:17Z · avg 253.9 ± 0.71 ms (SE)
Sample distribution: box = interquartile range (250.7–255.3 ms), median 251.8 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 (165.5 ms) for this route.
Full 50-sample dataset
| Seq | Offset (ms) | RTT (ms) |
|---|---|---|
| 1 | 0 | 260.14 |
| 2 | 100 | 261.31 |
| 3 | 200 | 263.33 |
| 4 | 300 | 255.34 |
| 5 | 400 | 251.52 |
| 6 | 500 | 251.64 |
| 7 | 600 | 249.71 |
| 8 | 700 | 248.58 |
| 9 | 800 | 249.71 |
| 10 | 900 | 254.59 |
| 11 | 1000 | 254.00 |
| 12 | 1100 | 253.01 |
| 13 | 1200 | 260.99 |
| 14 | 1300 | 254.28 |
| 15 | 1400 | 262.67 |
| 16 | 1500 | 265.10 |
| 17 | 1600 | 255.98 |
| 18 | 1700 | 250.90 |
| 19 | 1800 | 251.40 |
| 20 | 1900 | 262.86 |
| 21 | 2000 | 254.81 |
| 22 | 2100 | 251.67 |
| 23 | 2200 | 256.35 |
| 24 | 2300 | 251.11 |
| 25 | 2400 | 252.31 |
| 26 | 2500 | 253.54 |
| 27 | 2600 | 250.31 |
| 28 | 2700 | 250.58 |
| 29 | 2800 | 251.65 |
| 30 | 2900 | 253.03 |
| 31 | 3000 | 252.07 |
| 32 | 3100 | 249.96 |
| 33 | 3200 | 249.18 |
| 34 | 3300 | 252.97 |
| 35 | 3400 | 272.81 |
| 36 | 3500 | 259.03 |
| 37 | 3600 | 251.72 |
| 38 | 3700 | 255.43 |
| 39 | 3800 | 251.23 |
| 40 | 3900 | 251.22 |
| 41 | 4000 | 250.06 |
| 42 | 4100 | 249.55 |
| 43 | 4200 | 249.49 |
| 44 | 4300 | 249.85 |
| 45 | 4400 | 248.78 |
| 46 | 4500 | 250.92 |
| 47 | 4600 | 255.23 |
| 48 | 4700 | 251.52 |
| 49 | 4800 | 251.82 |
| 50 | 4900 | 249.74 |
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.
Theoretical Fiber Latency
The propagation model uses public city-centre coordinates from GeoNames: London (51.50853, -0.12574) and Melbourne (-37.81400, 144.96332). These are not facility coordinates or a surveyed cable path.
| Physical Reference | Value |
|---|---|
| WGS-84 geodesic distance | 16,898.4 km |
| Vacuum RTT floor | 112.73 ms |
| Standard fiber RTT floor () | 165.48 ms |
| Low-latency fiber material floor | 164.82 ms |
| Engineering floor (5% path allowance) | 173.78 ms |
| Research 1.33× mapped-fiber reference | 220.09 ms |
| Estimated unamplified path loss | 3548.7 dB |
| Transparent optical spans / inline amplifiers | 222 / 221 |
| Published RTT inflation over fiber floor | 1.53× |
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 | 248.58 ms |
| Average RTT | 253.9 ms |
| Maximum RTT | 272.81 ms |
| Standard deviation | 4.99 ms |
| Stdev / average | 2.0% |
Estimated RTT trend
Modeled comparison, not historical probe measurements.
- Average
- 253.9 ms
- Minimum
- 251.4 ms
- Maximum
- 256.3 ms
- Average loss
- 0.02%
Route Context
- Departure PoP: London (LON)
- Destination PoP: Melbourne (MEL)
- Region overview: Europe → Asia Pacific
- Corridor overview: Europe to Asia Pacific
- Full global matrix: Backbone Latency Matrix
- Physical methodology: Theoretical Fiber Latency
Related City-Pair Routes
Reverse direction
- Melbourne to London latency and RTT: 253.1 ms
Fastest routes departing London (LON)
- London to Amsterdam latency and RTT: 5.1 ms
- London to Paris latency and RTT: 6.4 ms
- London to Frankfurt latency and RTT: 13.2 ms
- London to Berlin latency and RTT: 15.5 ms
- London to Marseille latency and RTT: 17.8 ms
Fastest routes arriving at Melbourne (MEL)
- Sydney to Melbourne latency and RTT: 9.7 ms
- Tokyo to Melbourne latency and RTT: 113.7 ms
- Taipei to Melbourne latency and RTT: 141.1 ms
- Los Angeles to Melbourne latency and RTT: 146.1 ms
- Hong Kong to Melbourne latency and RTT: 154.1 ms
Same corridor (Europe → Asia Pacific)
- Moscow to Hong Kong latency and RTT: 118.2 ms
- Moscow to Taipei latency and RTT: 131.6 ms
- Marseille to Singapore latency and RTT: 137.2 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/lon-mel.pings.{csv,json,yaml}. Cite the route, round timestamp and dataset version. Example: "Hats Network latency dataset, London → Melbourne round 2026-10-20T08:46:17Z, CC BY 4.0".
Round published October 20, 2026. See the full interactive latency matrix or browse more city-pair routes.