Ashburn to Singapore latency report: ICMP round-trip time, packet loss, jitter and distance analysis for the USA-Singapore route.

🇺🇸 Ashburn, USA (IAD) → 🇸🇬 Singapore (SIN)

Measurement round: 2026-08-15T04:03:13Z.

In measurement round 2026-08-15T04:03:13Z, ICMP echo probes between Ashburn, USA and Singapore, Singapore produced an average round-trip time of 211 ms across 50 samples, with a minimum of 202.28 ms and a maximum of 240.9 ms, and no packet loss.

The 15,535.9 km great-circle distance sets a straight-line fiber floor of about 152.14 ms, so the observed average is roughly 1.39 times that floor, putting fiber efficiency at 72.1%. The standard deviation of 8.48 ms and jitter of 7.36 ms are a little above the network's median run-to-run variation of 3.08% of average RTT, yet the zero-loss result points to a stable path.

This route ranked 18th of the 19 outbound routes measured in the round, placing it in the slower tail of the set. The practical takeaway is that Ashburn-to-Singapore RTT should be planned around a 211 ms average, with the straight-line fiber floor near 152 ms as the realistic lower bound.

Latency Summary

Metric	Value
RTT	211 ms
Jitter	7.36 ms
Packet Loss	0%
Standard Fiber Floor	152.14 ms
Fiber Efficiency	72.1%
Latency Tier	Fair
Source Region	North America
Destination Region	Asia Pacific

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.

Ping series: IAD → SIN

50 ICMP echo samples at 100 ms intervals · round 2026-08-15T04:03:13Z · avg 211.0 ± 1.20 ms (SE)

Sample distribution: box = interquartile range (205.6–214.9 ms), median 207.4 ms · whiskers = min–max · diamond = round average · each dot is one measured sample.

How to read this chart

The shaded band spans the measured minimum to maximum RTT of all samples collected up to that point, and the thin line traces the running average. The final position therefore matches the round statistics exactly — the band only widens when a new extreme sample arrives.

The dashed line is the round average, and the shaded band at the bottom is the theoretical fiber-optic floor (152.1 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	202.28
2	100	203.01
3	200	204.63
4	300	205.58
5	400	208.55
6	500	207.58
7	600	240.90
8	700	216.22
9	800	206.65
10	900	214.17
11	1000	206.33
12	1100	206.74
13	1200	236.37
14	1300	216.02
15	1400	206.84
16	1500	205.77
17	1600	204.17
18	1700	202.98
19	1800	205.98
20	1900	204.30
21	2000	226.34
22	2100	215.04
23	2200	206.80
24	2300	215.82
25	2400	211.44
26	2500	205.01
27	2600	203.28
28	2700	205.64
29	2800	204.85
30	2900	205.30
31	3000	208.80
32	3100	205.62
33	3200	205.88
34	3300	204.24
35	3400	233.71
36	3500	219.52
37	3600	207.30
38	3700	208.15
39	3800	214.67
40	3900	205.77
41	4000	217.77
42	4100	215.03
43	4200	221.09
44	4300	211.88
45	4400	217.89
46	4500	206.99
47	4600	209.22
48	4700	209.33
49	4800	212.56
50	4900	209.99

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 for citation guidance.

Download this dataset

Per-route ICMP ping series, released under CC BY 4.0. Uncompressed plain text — no decompression step needed.

CSV JSON YAML Full dataset

Theoretical Fiber Latency

The public physical reference uses the GeoNames city centres for Ashburn (39.04372, -77.48749) and Singapore (1.28967, 103.85007). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	15,535.9 km
Vacuum RTT floor	103.64 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	152.14 ms
Low-latency fiber material floor	151.53 ms
Engineering floor (5% path allowance)	159.77 ms
Research 1.33× mapped-fiber reference	202.35 ms
Estimated unamplified path loss	3262.5 dB
Transparent optical spans / inline amplifiers	204 / 203
Published RTT inflation over fiber floor	1.39×

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 current measurement round (2026-08-15T04:03:13Z) collected 50 ICMP echo samples on this route. Distribution statistics from that round:

Round Statistic	Value
Minimum RTT	202.28 ms
Average RTT	211 ms
Maximum RTT	240.9 ms
Standard deviation	8.48 ms
Stdev / average	4.0%

RTT trend

Estimated route stability across the selected time window.

Average: 211.1 ms
Minimum: 208.9 ms
Maximum: 213.3 ms
Average loss: 0.03%

Route Context

Departure PoP: Ashburn (IAD)
Destination PoP: Singapore (SIN)
Region overview: North America → Asia Pacific
Corridor overview: North America to Asia Pacific
Full global matrix: Backbone Latency Matrix
Physical methodology: Theoretical Fiber Latency

Reverse direction

Singapore to Ashburn latency and RTT — 210.9 ms

Fastest routes departing Ashburn (IAD)

Ashburn to New York latency and RTT — 6 ms
Ashburn to Miami latency and RTT — 28.6 ms
Ashburn to Los Angeles latency and RTT — 60 ms
Ashburn to Seattle latency and RTT — 61.3 ms
Ashburn to London latency and RTT — 70.4 ms

Fastest routes arriving at Singapore (SIN)

Hong Kong to Singapore latency and RTT — 31.2 ms
Taipei to Singapore latency and RTT — 44.2 ms
Tokyo to Singapore latency and RTT — 69.6 ms
Melbourne to Singapore latency and RTT — 88.3 ms
Sydney to Singapore latency and RTT — 94.7 ms

Same corridor (North America → Asia Pacific)

Seattle to Tokyo latency and RTT — 84.8 ms
Los Angeles to Tokyo latency and RTT — 100.9 ms
Seattle to Taipei latency and RTT — 115.1 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. Per-pair files are available at /opendata/latency/latest/pairs/iad-sin.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Ashburn → Singapore round 2026-08-15T04:03:13Z, CC BY 4.0".

Data auto-generated on August 15, 2026. Explore the full interactive latency matrix or browse more city-pair routes.

Ashburn, USA → Singapore RTT