# Sydney, Australia → Los Angeles, USA RTT

🇦🇺 **Sydney, Australia (SYD)** → 🇺🇸 **Los Angeles, USA (LAX)**

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

During the 2026-08-16T04:07:28Z round, ICMP echo RTT between Sydney, Australia and Los Angeles, USA averaged 136.5 ms across 50 samples, with a minimum of 132.98 ms and a maximum of 143.81 ms. The 2.85 ms standard deviation and 2.5 ms jitter point to a stable path, and with packet loss at 0%, every probe in the round returned a response.

Across the 19 outbound routes measured in the same round, this Sydney-to-Los Angeles pairing ranked 6th by average RTT. Its sample variability is about 2.1% of the average, below the 3.28% median variability for those peers, so the route held a steadier latency profile than the typical route.

At a geodesic distance of 12,063.2 km, the route has a vacuum floor of 80.48 ms and an estimated fiber floor of 118.13 ms. The measured average is 1.16 times that fiber floor, an 86.5% fiber efficiency that leaves modest overhead for a trans-Pacific crossing.

## Latency Summary

| Metric               | Value                                                        |
| -------------------- | ------------------------------------------------------------ |
| RTT                  | **136.5 ms**                                                 |
| Jitter               | **2.5 ms**                                                   |
| Packet Loss          | **0%**                                                       |
| Standard Fiber Floor | **118.13 ms**                                                |
| Fiber Efficiency     | **86.5%**                                                    |
| Latency Tier         | Good                                                         |
| Source Region        | [Asia Pacific](/docs/network/latency/regions/asia-pacific)   |
| Destination Region   | [North America](/docs/network/latency/regions/north-america) |

## 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 [Los Angeles](https://www.geonames.org/5368361) (34.05223, -118.24368). It does not disclose either facility address.

| Physical Reference                            | Value           |
| --------------------------------------------- | --------------- |
| WGS-84 geodesic distance                      | **12,063.2 km** |
| Vacuum RTT floor                              | **80.48 ms**    |
| Standard fiber RTT floor ($n_g=1.4679$)       | **118.13 ms**   |
| Low-latency fiber material floor              | **117.66 ms**   |
| Engineering floor (5% path allowance)         | **124.05 ms**   |
| Research 1.33× mapped-fiber reference         | **157.12 ms**   |
| Estimated unamplified path loss               | **2533.3 dB**   |
| Transparent optical spans / inline amplifiers | **159 / 158**   |
| Published RTT inflation over fiber floor      | **1.16×**       |

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        | **132.98 ms** |
| Average RTT        | **136.5 ms**  |
| Maximum RTT        | **143.81 ms** |
| Standard deviation | **2.85 ms**   |
| Stdev / average    | **2.1%**      |

## Route Context

* Departure PoP: [Sydney (SYD)](/docs/network/latency/syd-sydney)
* Destination PoP: [Los Angeles (LAX)](/docs/network/latency/lax-los-angeles)
* Region overview: [Asia Pacific](/docs/network/latency/regions/asia-pacific) → [North America](/docs/network/latency/regions/north-america)
* 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**

* [Los Angeles to Sydney latency and RTT](/docs/network/latency/pairs/lax-syd-rtt) — 137.6 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 Los Angeles (LAX)**

* [Seattle to Los Angeles latency and RTT](/docs/network/latency/pairs/sea-lax-rtt) — 25.9 ms
* [Miami to Los Angeles latency and RTT](/docs/network/latency/pairs/mia-lax-rtt) — 56.8 ms
* [New York to Los Angeles latency and RTT](/docs/network/latency/pairs/nyc-lax-rtt) — 58.9 ms
* [Ashburn to Los Angeles latency and RTT](/docs/network/latency/pairs/iad-lax-rtt) — 60.7 ms
* [Tokyo to Los Angeles latency and RTT](/docs/network/latency/pairs/tyo-lax-rtt) — 101.2 ms

**Same corridor (Asia Pacific → North America)**

* [Tokyo to Seattle latency and RTT](/docs/network/latency/pairs/tyo-sea-rtt) — 84.8 ms
* [Taipei to Seattle latency and RTT](/docs/network/latency/pairs/tpe-sea-rtt) — 115.8 ms
* [Hong Kong to Seattle latency and RTT](/docs/network/latency/pairs/hkg-sea-rtt) — 131.6 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-lax.pings.{csv,json,yaml}`. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Sydney → Los Angeles 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-lax-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.