# Ashburn, USA → New York, USA RTT

🇺🇸 **Ashburn, USA (IAD)** → 🇺🇸 **New York, USA (NYC)**

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

For the 2026-08-16T04:07:28Z round, Ashburn-to-New York produced an average ICMP RTT of 6 ms from 50 samples, with a minimum of 5.77 ms and a maximum of 6.79 ms, plus zero packet loss and jitter of 0.19 ms.

At 350.8 km, the reference vacuum floor is 2.34 ms and the direct fiber floor is 3.44 ms. The observed 6 ms average runs 1.75 times the fiber floor, a fiber efficiency of 57.3 percent, placing the route well within ultra-low-latency territory for this distance.

This route ranks first among the 19 Ashburn outbound routes measured in the same round. Its standard deviation of 0.20 ms is only about 3.3 percent of the average, close to the 3.28 percent median relative variation across the route set, and the near-zero jitter reinforces how consistent the short trip is.

## Latency Summary

| Metric               | Value                                                        |
| -------------------- | ------------------------------------------------------------ |
| RTT                  | **6 ms**                                                     |
| Jitter               | **0.19 ms**                                                  |
| Packet Loss          | **0%**                                                       |
| Standard Fiber Floor | **3.44 ms**                                                  |
| Fiber Efficiency     | **57.3%**                                                    |
| Latency Tier         | Ultra-Low                                                    |
| Source Region        | [North America](/docs/network/latency/regions/north-america) |
| 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 [Ashburn](https://www.geonames.org/4744870) (39.04372, -77.48749) and [New York City](https://www.geonames.org/5128581) (40.71427, -74.00597). It does not disclose either facility address.

| Physical Reference                            | Value        |
| --------------------------------------------- | ------------ |
| WGS-84 geodesic distance                      | **350.8 km** |
| Vacuum RTT floor                              | **2.34 ms**  |
| Standard fiber RTT floor ($n_g=1.4679$)       | **3.44 ms**  |
| Low-latency fiber material floor              | **3.42 ms**  |
| Engineering floor (5% path allowance)         | **3.61 ms**  |
| Research 1.33× mapped-fiber reference         | **4.57 ms**  |
| Estimated unamplified path loss               | **73.7 dB**  |
| Transparent optical spans / inline amplifiers | **5 / 4**    |
| Published RTT inflation over fiber floor      | **1.75×**    |

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        | **5.77 ms** |
| Average RTT        | **6 ms**    |
| Maximum RTT        | **6.79 ms** |
| Standard deviation | **0.2 ms**  |
| Stdev / average    | **3.3%**    |

## Route Context

* Departure PoP: [Ashburn (IAD)](/docs/network/latency/iad-ashburn)
* Destination PoP: [New York (NYC)](/docs/network/latency/nyc-new-york)
* Region overview: [North America](/docs/network/latency/regions/north-america) → [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**

* [New York to Ashburn latency and RTT](/docs/network/latency/pairs/nyc-iad-rtt) — 6 ms

**Fastest routes departing Ashburn (IAD)**

* [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
* [Ashburn to Amsterdam latency and RTT](/docs/network/latency/pairs/iad-ams-rtt) — 75.2 ms

**Fastest routes arriving at New York (NYC)**

* [Miami to New York latency and RTT](/docs/network/latency/pairs/mia-nyc-rtt) — 33.3 ms
* [Los Angeles to New York latency and RTT](/docs/network/latency/pairs/lax-nyc-rtt) — 57.9 ms
* [Seattle to New York latency and RTT](/docs/network/latency/pairs/sea-nyc-rtt) — 59.5 ms
* [London to New York latency and RTT](/docs/network/latency/pairs/lon-nyc-rtt) — 63.8 ms
* [Amsterdam to New York latency and RTT](/docs/network/latency/pairs/ams-nyc-rtt) — 68.6 ms

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

* [Seattle to Los Angeles latency and RTT](/docs/network/latency/pairs/sea-lax-rtt) — 25.9 ms
* [Los Angeles to Seattle latency and RTT](/docs/network/latency/pairs/lax-sea-rtt) — 26.9 ms
* [Miami to Ashburn latency and RTT](/docs/network/latency/pairs/mia-iad-rtt) — 27.3 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-nyc.pings.{csv,json,yaml}`. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Ashburn → New York 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-nyc-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.