# Paris, France → Sydney, Australia RTT

🇫🇷 **Paris, France (PAR)** → 🇦🇺 **Sydney, Australia (SYD)**

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

ICMP echo probes from Paris to Sydney during the 2026-08-16T04:07:28Z measurement window averaged 249.7 ms over 50 samples, with a low of 240.64 ms and a high of 279.37 ms. The 9.37 ms standard deviation and 7.49 ms jitter describe a fairly steady path, and every probe was returned.

The measured RTT is 1.5 times the theoretical fiber-floor estimate of 166.06 ms for the 16,957.7 km great-circle separation, giving a fiber efficiency of 66.5%. The overhead is modest for such a long intercontinental path, and the zero packet loss supports the route's fair latency tier.

The route is ranked 19th in the 19-route Paris outbound set, placing it at the far end. The median standard-deviation-to-average ratio for those routes is 3.28%, while this route's standard deviation is 3.75% of its average, so variability is close to the group norm. Distance, not instability, is the dominant explanation for the RTT.

## Latency Summary

| Metric               | Value                                                      |
| -------------------- | ---------------------------------------------------------- |
| RTT                  | **249.7 ms**                                               |
| Jitter               | **7.49 ms**                                                |
| Packet Loss          | **0%**                                                     |
| Standard Fiber Floor | **166.06 ms**                                              |
| Fiber Efficiency     | **66.5%**                                                  |
| Latency Tier         | Fair                                                       |
| Source Region        | [Europe](/docs/network/latency/regions/europe)             |
| Destination Region   | [Asia Pacific](/docs/network/latency/regions/asia-pacific) |

## 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 [Paris](https://www.geonames.org/2988507) (48.85341, 2.34880) and [Sydney](https://www.geonames.org/2147714) (-33.86785, 151.20732). It does not disclose either facility address.

| Physical Reference                            | Value           |
| --------------------------------------------- | --------------- |
| WGS-84 geodesic distance                      | **16,957.7 km** |
| Vacuum RTT floor                              | **113.13 ms**   |
| Standard fiber RTT floor ($n_g=1.4679$)       | **166.06 ms**   |
| Low-latency fiber material floor              | **165.4 ms**    |
| Engineering floor (5% path allowance)         | **174.39 ms**   |
| Research 1.33× mapped-fiber reference         | **220.86 ms**   |
| Estimated unamplified path loss               | **3561.1 dB**   |
| Transparent optical spans / inline amplifiers | **223 / 222**   |
| Published RTT inflation over fiber floor      | **1.5×**        |

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        | **240.64 ms** |
| Average RTT        | **249.7 ms**  |
| Maximum RTT        | **279.37 ms** |
| Standard deviation | **9.37 ms**   |
| Stdev / average    | **3.8%**      |

## Route Context

* Departure PoP: [Paris (PAR)](/docs/network/latency/par-paris)
* Destination PoP: [Sydney (SYD)](/docs/network/latency/syd-sydney)
* Region overview: [Europe](/docs/network/latency/regions/europe) → [Asia Pacific](/docs/network/latency/regions/asia-pacific)
* Corridor overview: [Europe to Asia Pacific](/docs/network/latency/regions/europe-to-asia-pacific)
* 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**

* [Sydney to Paris latency and RTT](/docs/network/latency/pairs/syd-par-rtt) — 250.3 ms

**Fastest routes departing Paris (PAR)**

* [Paris to London latency and RTT](/docs/network/latency/pairs/par-lon-rtt) — 6.4 ms
* [Paris to Amsterdam latency and RTT](/docs/network/latency/pairs/par-ams-rtt) — 7 ms
* [Paris to Frankfurt latency and RTT](/docs/network/latency/pairs/par-fra-rtt) — 7.6 ms
* [Paris to Marseille latency and RTT](/docs/network/latency/pairs/par-mrs-rtt) — 8.9 ms
* [Paris to Berlin latency and RTT](/docs/network/latency/pairs/par-ber-rtt) — 15.5 ms

**Fastest routes arriving at Sydney (SYD)**

* [Melbourne to Sydney latency and RTT](/docs/network/latency/pairs/mel-syd-rtt) — 9.8 ms
* [Singapore to Sydney latency and RTT](/docs/network/latency/pairs/sin-syd-rtt) — 94.5 ms
* [Tokyo to Sydney latency and RTT](/docs/network/latency/pairs/tyo-syd-rtt) — 101.9 ms
* [Taipei to Sydney latency and RTT](/docs/network/latency/pairs/tpe-syd-rtt) — 133.2 ms
* [Hong Kong to Sydney latency and RTT](/docs/network/latency/pairs/hkg-syd-rtt) — 137.2 ms

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

* [Moscow to Hong Kong latency and RTT](/docs/network/latency/pairs/mow-hkg-rtt) — 118.6 ms
* [Moscow to Taipei latency and RTT](/docs/network/latency/pairs/mow-tpe-rtt) — 132.1 ms
* [Marseille to Singapore latency and RTT](/docs/network/latency/pairs/mrs-sin-rtt) — 139.6 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/par-syd.pings.{csv,json,yaml}`. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Paris → Sydney 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/par-syd-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.