# Ashburn, USA → Marseille, France RTT

🇺🇸 **Ashburn, USA (IAD)** → 🇫🇷 **Marseille, France (MRS)**

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

Measurement round 2026-08-16T04:07:28Z collected 50 ICMP echo probes from Ashburn, USA to Marseille, France, producing an average RTT of 86.5 ms, a minimum of 81.69 ms, a maximum of 97.62 ms, and no packet loss.

The 6,672.7 km geodesic distance gives a vacuum floor of 44.52 ms and a fiber floor of 65.34 ms; at 86.5 ms the route runs 1.32 times the fiber floor, with 75.5% fiber efficiency. The wider spread between minimum and maximum, roughly 16 ms, and the 3.63 ms standard deviation show that Marseille-bound traffic can carry noticeable timing variability even with zero loss.

This route ranked tenth of the 19 outbound routes measured from Ashburn. Its standard deviation of 3.63 ms represents 4.2% of the average, above the 3.28% median fluctuation ratio for comparable routes; the jitter of 3.41 ms is the main feature to watch on this path.

## Latency Summary

| Metric               | Value                                                        |
| -------------------- | ------------------------------------------------------------ |
| RTT                  | **86.5 ms**                                                  |
| Jitter               | **3.41 ms**                                                  |
| Packet Loss          | **0%**                                                       |
| Standard Fiber Floor | **65.34 ms**                                                 |
| Fiber Efficiency     | **75.5%**                                                    |
| Latency Tier         | Good                                                         |
| Source Region        | [North America](/docs/network/latency/regions/north-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 [Ashburn](https://www.geonames.org/4744870) (39.04372, -77.48749) 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                      | **6,672.7 km** |
| Vacuum RTT floor                              | **44.52 ms**   |
| Standard fiber RTT floor ($n_g=1.4679$)       | **65.34 ms**   |
| Low-latency fiber material floor              | **65.08 ms**   |
| Engineering floor (5% path allowance)         | **68.62 ms**   |
| Research 1.33× mapped-fiber reference         | **86.91 ms**   |
| Estimated unamplified path loss               | **1401.3 dB**  |
| Transparent optical spans / inline amplifiers | **88 / 87**    |
| Published RTT inflation over fiber floor      | **1.32×**      |

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        | **81.69 ms** |
| Average RTT        | **86.5 ms**  |
| Maximum RTT        | **97.62 ms** |
| Standard deviation | **3.63 ms**  |
| Stdev / average    | **4.2%**     |

## Route Context

* Departure PoP: [Ashburn (IAD)](/docs/network/latency/iad-ashburn)
* Destination PoP: [Marseille (MRS)](/docs/network/latency/mrs-marseille)
* Region overview: [North America](/docs/network/latency/regions/north-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 Ashburn latency and RTT](/docs/network/latency/pairs/mrs-iad-rtt) — 85.7 ms

**Fastest routes departing Ashburn (IAD)**

* [Ashburn to New York latency and RTT](/docs/network/latency/pairs/iad-nyc-rtt) — 6 ms
* [Ashburn to Miami latency and RTT](/docs/network/latency/pairs/iad-mia-rtt) — 27.4 ms
* [Ashburn to Los Angeles latency and RTT](/docs/network/latency/pairs/iad-lax-rtt) — 60.7 ms
* [Ashburn to Seattle latency and RTT](/docs/network/latency/pairs/iad-sea-rtt) — 62.3 ms
* [Ashburn to London latency and RTT](/docs/network/latency/pairs/iad-lon-rtt) — 70.3 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 (North America → Europe)**

* [New York to London latency and RTT](/docs/network/latency/pairs/nyc-lon-rtt) — 63.5 ms
* [New York to Amsterdam latency and RTT](/docs/network/latency/pairs/nyc-ams-rtt) — 68.7 ms
* [New York to Paris latency and RTT](/docs/network/latency/pairs/nyc-par-rtt) — 68.9 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/iad-mrs.pings.{csv,json,yaml}`. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Ashburn → 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/iad-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.