# Sydney, Australia → Marseille, France RTT

🇦🇺 **Sydney, Australia (SYD)** → 🇫🇷 **Marseille, France (MRS)**

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

The 2026-08-16T04:07:28Z round of 50 ICMP echo probes from Sydney to Marseille recorded an average round-trip time of 240.5 ms, with a minimum of 231.2 ms and a maximum of 264.13 ms. No packets were lost, and the route showed comparatively tight timing: jitter of 6.37 ms and a standard deviation of 7.87 ms.

The great-circle distance is 16,891 km, and the corresponding fiber-floor RTT is 165.41 ms. The measured average is 1.45 times that floor, making this a 68.8% fiber-efficient path; the roughly 75 ms of overhead over the ideal fiber path reflects the practical cost of such a long intercontinental route.

Ranked 11th of 19 outbound paths from Sydney in this round, the route's variability of about 3.3% of the average aligns almost exactly with the 3.28% median for the route set. The combination of zero loss, a 7.87 ms standard deviation, and 6.37 ms jitter points to a steady network-layer path during this probe window. These ICMP RTT values describe network-layer delay only, not the throughput users should expect from applications.

## Latency Summary

| Metric               | Value                                                      |
| -------------------- | ---------------------------------------------------------- |
| RTT                  | **240.5 ms**                                               |
| Jitter               | **6.37 ms**                                                |
| Packet Loss          | **0%**                                                     |
| Standard Fiber Floor | **165.41 ms**                                              |
| Fiber Efficiency     | **68.8%**                                                  |
| Latency Tier         | Fair                                                       |
| Source Region        | [Asia Pacific](/docs/network/latency/regions/asia-pacific) |
| Destination Region   | [Europe](/docs/network/latency/regions/europe)             |

## Ping Measurement Series

The chart below renders the 50-sample ICMP echo measurement round for this route; an accessible table of every sample is included with the chart.

## Download This Route's Data

This route's measurement round is published as open data (CC BY 4.0) in CSV, JSON, and YAML. See [About This Measurement](#about-this-measurement) for citation guidance.

## Theoretical Fiber Latency

The public physical reference uses the GeoNames city centres for [Sydney](https://www.geonames.org/2147714) (-33.86785, 151.20732) and [Marseille](https://www.geonames.org/2995469) (43.29695, 5.38107). It does not disclose either facility address.

| Physical Reference                            | Value         |
| --------------------------------------------- | ------------- |
| WGS-84 geodesic distance                      | **16,891 km** |
| Vacuum RTT floor                              | **112.68 ms** |
| Standard fiber RTT floor ($n_g=1.4679$)       | **165.41 ms** |
| Low-latency fiber material floor              | **164.74 ms** |
| Engineering floor (5% path allowance)         | **173.7 ms**  |
| Research 1.33× mapped-fiber reference         | **219.99 ms** |
| Estimated unamplified path loss               | **3547.1 dB** |
| Transparent optical spans / inline amplifiers | **222 / 221** |
| Published RTT inflation over fiber floor      | **1.45×**     |

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](/docs/network/latency/theoretical-fiber-latency).

## Stability & Trend

The current measurement round (2026-08-16T04:07:28Z) collected 50 ICMP echo samples on this route. Distribution statistics from that round:

| Round Statistic    | Value         |
| ------------------ | ------------- |
| Minimum RTT        | **231.2 ms**  |
| Average RTT        | **240.5 ms**  |
| Maximum RTT        | **264.13 ms** |
| Standard deviation | **7.87 ms**   |
| Stdev / average    | **3.3%**      |

## Route Context

* Departure PoP: [Sydney (SYD)](/docs/network/latency/syd-sydney)
* Destination PoP: [Marseille (MRS)](/docs/network/latency/mrs-marseille)
* Region overview: [Asia Pacific](/docs/network/latency/regions/asia-pacific) → [Europe](/docs/network/latency/regions/europe)
* Full global matrix: [Backbone Latency Matrix](/docs/network/latency)
* Physical methodology: [Theoretical Fiber Latency](/docs/network/latency/theoretical-fiber-latency)

## Related City-Pair Routes

**Reverse direction**

* [Marseille to Sydney latency and RTT](/docs/network/latency/pairs/mrs-syd-rtt) — 240.6 ms

**Fastest routes departing Sydney (SYD)**

* [Sydney to Melbourne latency and RTT](/docs/network/latency/pairs/syd-mel-rtt) — 9.8 ms
* [Sydney to Singapore latency and RTT](/docs/network/latency/pairs/syd-sin-rtt) — 94.5 ms
* [Sydney to Tokyo latency and RTT](/docs/network/latency/pairs/syd-tyo-rtt) — 101.3 ms
* [Sydney to Taipei latency and RTT](/docs/network/latency/pairs/syd-tpe-rtt) — 131.7 ms
* [Sydney to Hong Kong latency and RTT](/docs/network/latency/pairs/syd-hkg-rtt) — 135.7 ms

**Fastest routes arriving at Marseille (MRS)**

* [Paris to Marseille latency and RTT](/docs/network/latency/pairs/par-mrs-rtt) — 8.9 ms
* [Frankfurt to Marseille latency and RTT](/docs/network/latency/pairs/fra-mrs-rtt) — 16.4 ms
* [London to Marseille latency and RTT](/docs/network/latency/pairs/lon-mrs-rtt) — 17.9 ms
* [Amsterdam to Marseille latency and RTT](/docs/network/latency/pairs/ams-mrs-rtt) — 19.6 ms
* [Berlin to Marseille latency and RTT](/docs/network/latency/pairs/ber-mrs-rtt) — 20.2 ms

**Same corridor (Asia Pacific → Europe)**

* [Hong Kong to Moscow latency and RTT](/docs/network/latency/pairs/hkg-mow-rtt) — 118.2 ms
* [Taipei to Moscow latency and RTT](/docs/network/latency/pairs/tpe-mow-rtt) — 132.7 ms
* [Singapore to Marseille latency and RTT](/docs/network/latency/pairs/sin-mrs-rtt) — 140.6 ms

## About This Measurement

Published RTT reflects best-case backbone path behavior measured with ICMP echo probes between PoPs. End-user latency also depends on local access networks, congestion, routing policy, and traffic engineering. None of these values is an SLA.

The measurement round behind this page is published as open data under **CC BY 4.0** in the [Hats Network latency dataset](/opendata/latency/). Per-pair files are available at `/opendata/latency/latest/pairs/syd-mrs.pings.{csv,json,yaml}`. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Sydney → Marseille round 2026-08-16T04:07:28Z, CC BY 4.0".

***

*Data auto-generated on August 16, 2026. Explore the [full interactive latency matrix](/docs/network/latency) or browse more [city-pair routes](/docs/network/latency/pairs).*

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## License and attribution

- **Canonical source:** [View the human-readable HTML page](https://hatsnet.io/docs/network/latency/pairs/syd-mrs-rtt).
- **Original documentation:** © Hats Network Inc., licensed under [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/).
- **Public latency data:** © Hats Network Inc., licensed under [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/).
- **Full terms:** [Content and Data License](https://hatsnet.io/docs/legal/content-and-data-license) — includes attribution requirements, third-party material, trademarks, source code and other exclusions.