Ashburn to São Paulo Latency, Ping & RTT | AS203314
Ashburn to São Paulo ping and RTT: 107.5 ms, 0.89 ms jitter, 74.79 ms fiber floor, and 69.6% efficiency across AS203314. Updated 2026-07-19.
🇺🇸 This page compares the published ping and round-trip time (RTT) from Ashburn (IAD) to 🇧🇷 São Paulo (GRU) with vacuum and optical-fiber physical limits.
Latency Summary
| Metric | Value |
|---|---|
| RTT | 107.5 ms |
| Jitter | 0.89 ms |
| Packet Loss | 0% |
| Standard Fiber Floor | 74.79 ms |
| Fiber Efficiency | 69.6% |
| Latency Tier | Good |
| Source Region | North America |
| Destination Region | South America |
Theoretical Fiber Latency
The public physical reference uses the GeoNames city centres for Ashburn (39.04372, -77.48749) and São Paulo (-23.54750, -46.63611). It does not disclose either facility address.
| Physical Reference | Value |
|---|---|
| WGS-84 geodesic distance | 7,637.7 km |
| Vacuum RTT floor | 50.95 ms |
| Standard fiber RTT floor () | 74.79 ms |
| Low-latency fiber material floor | 74.49 ms |
| Engineering floor (5% path allowance) | 78.54 ms |
| Research 1.33× mapped-fiber reference | 99.48 ms |
| Estimated unamplified path loss | 1603.9 dB |
| Transparent optical spans / inline amplifiers | 101 / 100 |
| Published RTT inflation over fiber floor | 1.44× |
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.
Stability & Trend
The following estimated indicators summarize route stability for the current publication period and are intended for comparative planning rather than SLA evaluation.
| Stability Indicator | Value |
|---|---|
| Minimum RTT | 106.3 ms |
| Median RTT (p50) | 107.3 ms |
| 95th percentile RTT (p95) | 108.7 ms |
| Maximum RTT | 109.3 ms |
| Jitter | 0.89 ms |
| Packet loss | 0% |
RTT trend
Estimated route stability across the selected time window.
- Average
- 107.5 ms
- Minimum
- 106.6 ms
- Maximum
- 108.3 ms
- Average loss
- 0.01%
Route Context
- Departure PoP: Ashburn (IAD)
- Destination PoP: São Paulo (GRU)
- Region overview: North America → South America
- Full global matrix: Backbone Latency Matrix
- Physical methodology: Theoretical Fiber Latency
Related City-Pair Routes
- Reverse direction: São Paulo to Ashburn latency and RTT — 128 ms
- Ashburn to New York latency and RTT — 6 ms
- Ashburn to Miami latency and RTT — 33.5 ms
- Ashburn to Los Angeles latency and RTT — 59.7 ms
- Ashburn to Seattle latency and RTT — 61.8 ms
- Ashburn to London latency and RTT — 71.1 ms
About This Measurement
Published RTT reflects best-case backbone path behavior. End-user latency also depends on local access networks, congestion, routing policy, and traffic engineering. Stability indicators are comparative estimates, and none of these values is an SLA.
Data auto-generated on July 19, 2026. Explore the full interactive latency matrix or browse more city-pair routes.