ICMP RTT from Ashburn, USA to Singapore, Singapore: average 211.5 ms, zero packet loss, Fair tier; includes route ranking from the 2026-08-16 measurement round.

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

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

The 2026-08-16T04:07:28Z ICMP echo RTT measurement from Ashburn, USA, to Singapore, Singapore, produced an average of 211.5 ms across 50 samples, with a minimum of 203.83 ms and a maximum of 243.56 ms. All packets were returned, so reported packet loss is 0%; the standard deviation of 6.36 ms and jitter of 5.45 ms place the route in the Fair latency tier.

At a geodesic distance of 15,535.9 km, the theoretical fiber-floor RTT is 152.14 ms. The measured average therefore sits at 1.39 times that floor, corresponding to roughly 71.9% fiber efficiency. That gap leaves room for possible path improvements, though this single series does not by itself explain where the extra delay occurs.

Compared with the 19 outbound routes measured from this network, this path ranked 18th by average RTT. Its standard deviation is about 3.0% of the average, slightly below the 3.28% median variability observed across the outbound route set. The loss-free result is a useful stability signal, but ICMP RTT should not be treated as a predictor of end-user application performance.

Latency Summary

Metric	Value
RTT	211.5 ms
Jitter	5.45 ms
Packet Loss	0%
Standard Fiber Floor	152.14 ms
Fiber Efficiency	71.9%
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 2026-08-16T04:07:28Z · avg 211.5 ± 0.90 ms (SE)

Sample distribution: box = interquartile range (207.5–214.2 ms), median 210.7 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	203.83
2	100	205.75
3	200	207.59
4	300	205.29
5	400	206.47
6	500	204.75
7	600	204.73
8	700	206.17
9	800	213.95
10	900	212.48
11	1000	209.14
12	1100	206.81
13	1200	219.17
14	1300	212.07
15	1400	217.13
16	1500	211.87
17	1600	208.23
18	1700	207.33
19	1800	217.49
20	1900	214.41
21	2000	215.36
22	2100	207.86
23	2200	215.01
24	2300	210.02
25	2400	215.40
26	2500	213.80
27	2600	209.01
28	2700	213.08
29	2800	211.31
30	2900	206.94
31	3000	210.42
32	3100	207.90
33	3200	212.87
34	3300	207.94
35	3400	205.64
36	3500	223.96
37	3600	214.29
38	3700	207.49
39	3800	212.57
40	3900	208.28
41	4000	205.25
42	4100	207.99
43	4200	213.98
44	4300	211.96
45	4400	214.21
46	4500	217.03
47	4600	211.02
48	4700	207.69
49	4800	243.56
50	4900	218.50

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 (2026-08-16T04:07:28Z) collected 50 ICMP echo samples on this route. Distribution statistics from that round:

Round Statistic	Value
Minimum RTT	203.83 ms
Average RTT	211.5 ms
Maximum RTT	243.56 ms
Standard deviation	6.36 ms
Stdev / average	3.0%

RTT trend

Estimated route stability across the selected time window.

Average: 211.7 ms
Minimum: 210.1 ms
Maximum: 213.9 ms
Average loss: 0.01%

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 ms

Fastest routes departing Ashburn (IAD)

Ashburn to New York latency and RTT — 6 ms
Ashburn to Miami latency and RTT — 27.4 ms
Ashburn to Los Angeles latency and RTT — 60.7 ms
Ashburn to Seattle latency and RTT — 62.3 ms
Ashburn to London latency and RTT — 70.3 ms

Fastest routes arriving at Singapore (SIN)

Hong Kong to Singapore latency and RTT — 31.5 ms
Taipei to Singapore latency and RTT — 44.3 ms
Tokyo to Singapore latency and RTT — 69.4 ms
Melbourne to Singapore latency and RTT — 88.4 ms
Sydney to Singapore latency and RTT — 94.5 ms

Same corridor (North America → Asia Pacific)

Seattle to Tokyo latency and RTT — 85 ms
Los Angeles to Tokyo latency and RTT — 101.2 ms
Seattle to Taipei latency and RTT — 114.7 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 2026-08-16T04:07:28Z, CC BY 4.0".

Data auto-generated on August 16, 2026. Explore the full interactive latency matrix or browse more city-pair routes.

Ashburn, USA → Singapore RTT