# São Paulo, Brazil → Marseille, France RTT

🇧🇷 **São Paulo, Brazil (GRU)** → 🇫🇷 **Marseille, France (MRS)**

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

In the 2026-08-16T04:07:28Z round, 50 ICMP echo requests from São Paulo to Marseille averaged 187.7 ms, with readings between 176.81 ms and 212.03 ms. There was no packet loss, while jitter reached 7.15 ms and the standard deviation was 8.46 ms.

The average is 2.1 times the 89.24 ms fiber floor for the 9,113 km great-circle path, yielding a 47.5% fiber efficiency and a “Fair” latency tier. The 35.22 ms spread between minimum and maximum RTT points to a path with more variability than the clean distance-based floor would suggest.

This route is ranked 10th among the 19 outbound São Paulo routes, and the median variability across those 19 paths is 3.28% of average RTT. At 8.46 ms, this route’s standard deviation is about 4.5% of its average, so Marseille-bound traffic in this round was noticeably more uneven than the median outbound route.

## Latency Summary

| Metric               | Value                                                        |
| -------------------- | ------------------------------------------------------------ |
| RTT                  | **187.7 ms**                                                 |
| Jitter               | **7.15 ms**                                                  |
| Packet Loss          | **0%**                                                       |
| Standard Fiber Floor | **89.24 ms**                                                 |
| Fiber Efficiency     | **47.5%**                                                    |
| Latency Tier         | Fair                                                         |
| Source Region        | [South America](/docs/network/latency/regions/south-america) |
| 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 [São Paulo](https://www.geonames.org/3448439) (-23.54750, -46.63611) 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                      | **9,113 km**  |
| Vacuum RTT floor                              | **60.8 ms**   |
| Standard fiber RTT floor ($n_g=1.4679$)       | **89.24 ms**  |
| Low-latency fiber material floor              | **88.88 ms**  |
| Engineering floor (5% path allowance)         | **93.72 ms**  |
| Research 1.33× mapped-fiber reference         | **118.69 ms** |
| Estimated unamplified path loss               | **1913.7 dB** |
| Transparent optical spans / inline amplifiers | **120 / 119** |
| Published RTT inflation over fiber floor      | **2.1×**      |

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        | **176.81 ms** |
| Average RTT        | **187.7 ms**  |
| Maximum RTT        | **212.03 ms** |
| Standard deviation | **8.46 ms**   |
| Stdev / average    | **4.5%**      |

## Route Context

* Departure PoP: [São Paulo (GRU)](/docs/network/latency/gru-sao-paulo)
* Destination PoP: [Marseille (MRS)](/docs/network/latency/mrs-marseille)
* Region overview: [South America](/docs/network/latency/regions/south-america) → [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 São Paulo latency and RTT](/docs/network/latency/pairs/mrs-gru-rtt) — 186.7 ms

**Fastest routes departing São Paulo (GRU)**

* [São Paulo to Miami latency and RTT](/docs/network/latency/pairs/gru-mia-rtt) — 74 ms
* [São Paulo to New York latency and RTT](/docs/network/latency/pairs/gru-nyc-rtt) — 122 ms
* [São Paulo to Ashburn latency and RTT](/docs/network/latency/pairs/gru-iad-rtt) — 128 ms
* [São Paulo to Los Angeles latency and RTT](/docs/network/latency/pairs/gru-lax-rtt) — 130.8 ms
* [São Paulo to Seattle latency and RTT](/docs/network/latency/pairs/gru-sea-rtt) — 155.9 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 (South America → Europe)**

* [São Paulo to London latency and RTT](/docs/network/latency/pairs/gru-lon-rtt) — 175.8 ms
* [São Paulo to Amsterdam latency and RTT](/docs/network/latency/pairs/gru-ams-rtt) — 180 ms
* [São Paulo to Paris latency and RTT](/docs/network/latency/pairs/gru-par-rtt) — 180.2 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/gru-mrs.pings.{csv,json,yaml}`. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, São Paulo → 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/gru-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.