Seattle to Singapore Latency, Ping & RTT | AS203314
Seattle to Singapore ping and RTT: 153.5 ms, 1 ms jitter, 127.22 ms fiber floor, and 82.9% efficiency across AS203314. Updated 2026-07-19.
🇺🇸 This page compares the published ping and round-trip time (RTT) from Seattle (SEA) to 🇸🇬 Singapore (SIN) with vacuum and optical-fiber physical limits.
Latency Summary
| Metric | Value |
|---|---|
| RTT | 153.5 ms |
| Jitter | 1 ms |
| Packet Loss | 0.06% |
| Standard Fiber Floor | 127.22 ms |
| Fiber Efficiency | 82.9% |
| Latency Tier | Fair |
| Source Region | North America |
| Destination Region | Asia Pacific |
Theoretical Fiber Latency
The public physical reference uses the GeoNames city centres for Seattle (47.60621, -122.33207) and Singapore (1.28967, 103.85007). It does not disclose either facility address.
| Physical Reference | Value |
|---|---|
| WGS-84 geodesic distance | 12,991.1 km |
| Vacuum RTT floor | 86.67 ms |
| Standard fiber RTT floor () | 127.22 ms |
| Low-latency fiber material floor | 126.71 ms |
| Engineering floor (5% path allowance) | 133.6 ms |
| Research 1.33× mapped-fiber reference | 169.2 ms |
| Estimated unamplified path loss | 2728.1 dB |
| Transparent optical spans / inline amplifiers | 171 / 170 |
| Published RTT inflation over fiber floor | 1.21× |
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 | 152.5 ms |
| Median RTT (p50) | 153.3 ms |
| 95th percentile RTT (p95) | 155 ms |
| Maximum RTT | 155.9 ms |
| Jitter | 1 ms |
| Packet loss | 0.06% |
RTT trend
Estimated route stability across the selected time window.
- Average
- 153.6 ms
- Minimum
- 152.2 ms
- Maximum
- 155.2 ms
- Average loss
- 0.02%
Route Context
- Departure PoP: Seattle (SEA)
- Destination PoP: Singapore (SIN)
- Region overview: North America → Asia Pacific
- Full global matrix: Backbone Latency Matrix
- Physical methodology: Theoretical Fiber Latency
Related City-Pair Routes
- Reverse direction: Singapore to Seattle latency and RTT — 153.8 ms
- Seattle to Los Angeles latency and RTT — 27.1 ms
- Seattle to New York latency and RTT — 59.1 ms
- Seattle to Ashburn latency and RTT — 61.8 ms
- Seattle to Miami latency and RTT — 81.1 ms
- Seattle to Tokyo latency and RTT — 84 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.