# Marseille, France → Paris, France RTT

🇫🇷 **Marseille, France (MRS)** → 🇫🇷 **Paris, France (PAR)**

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

Measurement round 2026-08-16T04:07:28Z captured 50 ICMP echo probes from Marseille to Paris with an average RTT of 8.9 ms, a minimum of 8.72 ms, and a maximum of 9.67 ms. The 0.16 ms standard deviation and 0.13 ms jitter indicate a tightly grouped distribution, and zero packet loss over the sample window points to a stable domestic path.

For a 660.5 km straight-line distance, the observed average is 1.38 times the fiber-floor estimate of 6.47 ms, which corresponds to a fiber efficiency of 72.7 percent. The result stays within the Ultra-Low latency tier and leaves little room between the measured value and the theoretical floor for this route.

Among the 19 outbound routes in this measurement set, Marseille-Paris ranks first, and its standard-deviation-to-average ratio of about 1.8 percent is well below the network-median 3.28 percent. That combination gives this route the best outbound rank in the set while also keeping variability comparatively low.

## Latency Summary

| Metric               | Value                                          |
| -------------------- | ---------------------------------------------- |
| RTT                  | **8.9 ms**                                     |
| Jitter               | **0.13 ms**                                    |
| Packet Loss          | **0%**                                         |
| Standard Fiber Floor | **6.47 ms**                                    |
| Fiber Efficiency     | **72.7%**                                      |
| Latency Tier         | Ultra-Low                                      |
| Source Region        | [Europe](/docs/network/latency/regions/europe) |
| 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 [Marseille](https://www.geonames.org/2995469) (43.29695, 5.38107) and [Paris](https://www.geonames.org/2988507) (48.85341, 2.34880). It does not disclose either facility address.

| Physical Reference                            | Value        |
| --------------------------------------------- | ------------ |
| WGS-84 geodesic distance                      | **660.5 km** |
| Vacuum RTT floor                              | **4.41 ms**  |
| Standard fiber RTT floor ($n_g=1.4679$)       | **6.47 ms**  |
| Low-latency fiber material floor              | **6.44 ms**  |
| Engineering floor (5% path allowance)         | **6.79 ms**  |
| Research 1.33× mapped-fiber reference         | **8.6 ms**   |
| Estimated unamplified path loss               | **138.7 dB** |
| Transparent optical spans / inline amplifiers | **9 / 8**    |
| Published RTT inflation over fiber floor      | **1.38×**    |

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        | **8.72 ms** |
| Average RTT        | **8.9 ms**  |
| Maximum RTT        | **9.67 ms** |
| Standard deviation | **0.16 ms** |
| Stdev / average    | **1.8%**    |

## Route Context

* Departure PoP: [Marseille (MRS)](/docs/network/latency/mrs-marseille)
* Destination PoP: [Paris (PAR)](/docs/network/latency/par-paris)
* Region overview: [Europe](/docs/network/latency/regions/europe) → [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**

* [Paris to Marseille latency and RTT](/docs/network/latency/pairs/par-mrs-rtt) — 8.9 ms

**Fastest routes departing Marseille (MRS)**

* [Marseille to Frankfurt latency and RTT](/docs/network/latency/pairs/mrs-fra-rtt) — 16 ms
* [Marseille to London latency and RTT](/docs/network/latency/pairs/mrs-lon-rtt) — 18.9 ms
* [Marseille to Amsterdam latency and RTT](/docs/network/latency/pairs/mrs-ams-rtt) — 20.3 ms
* [Marseille to Berlin latency and RTT](/docs/network/latency/pairs/mrs-ber-rtt) — 20.6 ms
* [Marseille to Moscow latency and RTT](/docs/network/latency/pairs/mrs-mow-rtt) — 49.6 ms

**Fastest routes arriving at Paris (PAR)**

* [London to Paris latency and RTT](/docs/network/latency/pairs/lon-par-rtt) — 6.4 ms
* [Amsterdam to Paris latency and RTT](/docs/network/latency/pairs/ams-par-rtt) — 7 ms
* [Frankfurt to Paris latency and RTT](/docs/network/latency/pairs/fra-par-rtt) — 7.6 ms
* [Berlin to Paris latency and RTT](/docs/network/latency/pairs/ber-par-rtt) — 15.6 ms
* [Moscow to Paris latency and RTT](/docs/network/latency/pairs/mow-par-rtt) — 44 ms

**Same corridor (Europe → Europe)**

* [Amsterdam to London latency and RTT](/docs/network/latency/pairs/ams-lon-rtt) — 5.2 ms
* [London to Amsterdam latency and RTT](/docs/network/latency/pairs/lon-ams-rtt) — 5.2 ms
* [Amsterdam to Frankfurt latency and RTT](/docs/network/latency/pairs/ams-fra-rtt) — 5.9 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/mrs-par.pings.{csv,json,yaml}`. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Marseille → Paris 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/mrs-par-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.