Seattle to Los Angeles ping and RTT: 26.8 ms, 0.59 ms jitter, 15.12 ms fiber floor, and 56.4% efficiency across AS203314. Updated 2026-08-09.

🇺🇸 This page compares the published ping and round-trip time (RTT) from Seattle (SEA) to 🇺🇸 Los Angeles (LAX) with vacuum and optical-fiber physical limits.

As of August 9, 2026, the Seattle → Los Angeles route on Hats Network averages 26.8 ms RTT across a 50-sample daily ICMP echo measurement round (source: GSL), 1.77× the theoretical fiber-floor limit of 15.12 ms.

Among the 19 measured routes departing Seattle, this is the fastest route by average RTT.

With a stdev-to-average ratio of 2.7%, this route is more stable than the network median of 3.4%. Across the round, per-probe RTT ranged from 26.09 ms to 29.48 ms with a standard deviation of 0.72 ms.

Latency Summary

Metric	Value
RTT	26.8 ms
Jitter	0.59 ms
Packet Loss	0%
Standard Fiber Floor	15.12 ms
Fiber Efficiency	56.4%
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: SEA → LAX

50 ICMP echo samples at 100 ms intervals · round 2026-08-09 · avg 26.8 ± 0.10 ms (SE)

Sample distribution: box = interquartile range (26.4–27.1 ms), median 26.6 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	26.17
2	100	26.14
3	200	26.12
4	300	26.49
5	400	26.62
6	500	26.42
7	600	26.44
8	700	26.19
9	800	26.27
10	900	26.11
11	1000	26.66
12	1100	26.66
13	1200	26.73
14	1300	26.96
15	1400	26.52
16	1500	27.45
17	1600	26.97
18	1700	27.14
19	1800	26.57
20	1900	26.22
21	2000	26.45
22	2100	26.24
23	2200	27.18
24	2300	26.77
25	2400	26.44
26	2500	26.47
27	2600	27.37
28	2700	26.82
29	2800	26.40
30	2900	26.15
31	3000	26.20
32	3100	28.29
33	3200	27.08
34	3300	27.54
35	3400	26.77
36	3500	26.80
37	3600	29.48
38	3700	27.56
39	3800	26.55
40	3900	26.41
41	4000	26.21
42	4100	26.09
43	4200	26.43
44	4300	29.00
45	4400	27.21
46	4500	26.44
47	4600	26.56
48	4700	28.36
49	4800	27.19
50	4900	26.69

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 Los Angeles (34.05223, -118.24368). 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	1.77×

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 (2026-08-09) collected 50 ICMP echo samples on this route. Distribution statistics from that round:

Round Statistic	Value
Minimum RTT	26.09 ms
Average RTT	26.8 ms
Maximum RTT	29.48 ms
Standard deviation	0.72 ms
Stdev / average	2.7%

RTT trend

Estimated route stability across the selected time window.

Average: 26.8 ms
Minimum: 26.6 ms
Maximum: 27.0 ms
Average loss: 0.02%

Route Context

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

Reverse direction

Los Angeles to Seattle latency and RTT — 27 ms

Fastest routes departing Seattle (SEA)

Seattle to New York latency and RTT — 58.7 ms
Seattle to Ashburn latency and RTT — 61.8 ms
Seattle to Miami latency and RTT — 81.8 ms
Seattle to Tokyo latency and RTT — 84.6 ms
Seattle to Taipei latency and RTT — 117.1 ms

Fastest routes arriving at Los Angeles (LAX)

Miami to Los Angeles latency and RTT — 57.3 ms
New York to Los Angeles latency and RTT — 58.9 ms
Ashburn to Los Angeles latency and RTT — 59.8 ms
Tokyo to Los Angeles latency and RTT — 101.3 ms
London to Los Angeles latency and RTT — 127.3 ms

Same corridor (North America → North America)

Ashburn to New York latency and RTT — 6.1 ms
New York to Ashburn latency and RTT — 6.1 ms
Miami to Ashburn latency and RTT — 27 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-lax.pings.{csv,json,yaml}. When citing, include the route, the measurement round date, and the dataset version — for example: "Hats Network latency dataset, Seattle → Los Angeles round 2026-08-09, CC BY 4.0".

Data auto-generated on August 9, 2026. Explore the full interactive latency matrix or browse more city-pair routes.

Seattle to Los Angeles Latency, Ping & RTT | AS203314