ICMP RTT measurement from Los Angeles, USA to Seattle, USA: 27.5 ms average latency, 0.98 ms jitter, zero packet loss over 50 samples.

🇺🇸 Los Angeles, USA (LAX) → 🇺🇸 Seattle, USA (SEA)

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

The 2026-08-15T04:03:13Z measurement round sent 50 ICMP echo requests from Los Angeles to Seattle at 100 ms intervals, yielding an average round-trip time of 27.5 ms, a minimum of 26.34 ms, a maximum of 30.47 ms, jitter of 0.98 ms, and no packet loss.

Against a 1,543.6 km great-circle distance, this Ultra-Low latency result sits 1.82 times above the theoretical fiber floor of 15.12 ms. The narrow 1.05 ms standard deviation shows the path is consistent, and the zero-loss sample reinforces that stability.

This route is ranked first among the 19 routes measured in the same cycle, making it the fastest reference point on the network. Its variability is 3.8% of the average, slightly above the network's median variability of 3.08%, so the lowest-latency path also remains nearly as predictable as typical West Coast routes.

Latency Summary

Metric	Value
RTT	27.5 ms
Jitter	0.98 ms
Packet Loss	0%
Standard Fiber Floor	15.12 ms
Fiber Efficiency	55%
Latency Tier	Ultra-Low
Source Region	North America
Destination Region	North America

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: LAX → SEA

50 ICMP echo samples at 100 ms intervals · round 2026-08-15T04:03:13Z · avg 27.5 ± 0.15 ms (SE)

Sample distribution: box = interquartile range (26.7–28.0 ms), median 27.1 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 (15.1 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	28.45
2	100	27.38
3	200	26.60
4	300	29.86
5	400	28.23
6	500	26.87
7	600	27.26
8	700	26.71
9	800	26.72
10	900	26.74
11	1000	26.34
12	1100	26.34
13	1200	27.73
14	1300	27.33
15	1400	28.44
16	1500	27.23
17	1600	27.90
18	1700	27.19
19	1800	28.19
20	1900	27.07
21	2000	26.64
22	2100	26.35
23	2200	26.35
24	2300	26.90
25	2400	28.05
26	2500	27.03
27	2600	27.02
28	2700	26.58
29	2800	26.61
30	2900	26.49
31	3000	27.21
32	3100	30.20
33	3200	29.78
34	3300	27.97
35	3400	27.06
36	3500	26.79
37	3600	30.47
38	3700	28.57
39	3800	27.10
40	3900	28.32
41	4000	26.98
42	4100	27.31
43	4200	26.98
44	4300	27.45
45	4400	26.88
46	4500	26.42
47	4600	29.51
48	4700	27.78
49	4800	26.72
50	4900	28.90

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 Los Angeles (34.05223, -118.24368) and Seattle (47.60621, -122.33207). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	1,543.6 km
Vacuum RTT floor	10.3 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	15.12 ms
Low-latency fiber material floor	15.06 ms
Engineering floor (5% path allowance)	15.87 ms
Research 1.33× mapped-fiber reference	20.1 ms
Estimated unamplified path loss	324.2 dB
Transparent optical spans / inline amplifiers	21 / 20
Published RTT inflation over fiber floor	1.82×

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	26.34 ms
Average RTT	27.5 ms
Maximum RTT	30.47 ms
Standard deviation	1.05 ms
Stdev / average	3.8%

RTT trend

Estimated route stability across the selected time window.

Average: 27.5 ms
Minimum: 27.3 ms
Maximum: 27.7 ms
Average loss: 0.00%

Route Context

Departure PoP: Los Angeles (LAX)
Destination PoP: Seattle (SEA)
Region overview: North America → North America
Full global matrix: Backbone Latency Matrix
Physical methodology: Theoretical Fiber Latency

Reverse direction

Seattle to Los Angeles latency and RTT — 26.6 ms

Fastest routes departing Los Angeles (LAX)

Los Angeles to Miami latency and RTT — 57.1 ms
Los Angeles to New York latency and RTT — 59 ms
Los Angeles to Ashburn latency and RTT — 59.9 ms
Los Angeles to Tokyo latency and RTT — 100.9 ms
Los Angeles to London latency and RTT — 129.8 ms

Fastest routes arriving at Seattle (SEA)

New York to Seattle latency and RTT — 59 ms
Ashburn to Seattle latency and RTT — 61.3 ms
Miami to Seattle latency and RTT — 82 ms
Tokyo to Seattle latency and RTT — 84.6 ms
Taipei to Seattle latency and RTT — 115.7 ms

Same corridor (North America → North America)

Ashburn to New York latency and RTT — 6 ms
New York to Ashburn latency and RTT — 6 ms
Miami to Ashburn latency and RTT — 27.3 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/lax-sea.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Los Angeles → Seattle 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.

Los Angeles, USA → Seattle, USA RTT