ICMP RTT measurements from Seattle, USA to Singapore, Singapore, with average latency, jitter, packet loss, and fiber efficiency.

🇺🇸 Seattle, USA (SEA) → 🇸🇬 Singapore (SIN)

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

In the 2026-08-15T04:03:13Z measurement round, the Seattle-to-Singapore ICMP echo test averaged 153.6 ms over 50 samples, with a minimum of 149.1 ms and a maximum of 166.81 ms. Standard deviation was 4.22 ms, jitter was 3.62 ms, and no packets were lost.

For the 12,991.1 km geodesic distance, the vacuum floor is 86.67 ms and the fiber floor is 127.22 ms; the measured RTT is 1.21 times the fiber floor, or 82.8% fiber efficiency, which places the route in the Fair latency tier.

In the 19-route outbound set, this path ranked 14th, while the median variability across the set was 3.08%. The route's standard deviation was roughly 2.7% of its average RTT, so its variation was below the peer median even though absolute latency sat near the middle of the measured range.

Latency Summary

Metric	Value
RTT	153.6 ms
Jitter	3.62 ms
Packet Loss	0%
Standard Fiber Floor	127.22 ms
Fiber Efficiency	82.8%
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: SEA → SIN

50 ICMP echo samples at 100 ms intervals · round 2026-08-15T04:03:13Z · avg 153.6 ± 0.60 ms (SE)

Sample distribution: box = interquartile range (150.5–155.8 ms), median 152.1 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 (127.2 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	149.88
2	100	149.35
3	200	151.63
4	300	160.15
5	400	152.81
6	500	150.89
7	600	149.97
8	700	159.48
9	800	153.78
10	900	151.70
11	1000	153.96
12	1100	150.70
13	1200	158.79
14	1300	163.42
15	1400	155.10
16	1500	153.68
17	1600	150.59
18	1700	149.39
19	1800	149.49
20	1900	157.66
21	2000	152.21
22	2100	150.83
23	2200	150.07
24	2300	152.93
25	2400	151.49
26	2500	149.72
27	2600	150.25
28	2700	149.62
29	2800	157.88
30	2900	153.83
31	3000	155.60
32	3100	166.81
33	3200	155.86
34	3300	151.90
35	3400	152.80
36	3500	150.82
37	3600	149.64
38	3700	149.15
39	3800	149.10
40	3900	151.58
41	4000	151.87
42	4100	152.59
43	4200	158.44
44	4300	156.25
45	4400	152.89
46	4500	150.42
47	4600	151.77
48	4700	160.97
49	4800	163.91
50	4900	156.38

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 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 ( $n_g=1.4679$ )	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 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	149.1 ms
Average RTT	153.6 ms
Maximum RTT	166.81 ms
Standard deviation	4.22 ms
Stdev / average	2.7%

RTT trend

Estimated route stability across the selected time window.

Average: 153.5 ms
Minimum: 152.1 ms
Maximum: 155.1 ms
Average loss: 0.03%

Route Context

Departure PoP: Seattle (SEA)
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 Seattle latency and RTT — 154 ms

Fastest routes departing Seattle (SEA)

Seattle to Los Angeles latency and RTT — 26.6 ms
Seattle to New York latency and RTT — 59 ms
Seattle to Ashburn latency and RTT — 62 ms
Seattle to Miami latency and RTT — 81.1 ms
Seattle to Tokyo latency and RTT — 84.8 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)

Los Angeles to Tokyo latency and RTT — 100.9 ms
Seattle to Taipei latency and RTT — 115.1 ms
Seattle to Hong Kong latency and RTT — 130.7 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/sea-sin.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Seattle → 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.

Seattle, USA → Singapore RTT