Direct ICMP echo RTT measurement from Miami, USA to Seattle, USA: 82 ms average latency, 0% packet loss, 2.15 ms jitter over 50 samples.

🇺🇸 Miami, USA (MIA) → 🇺🇸 Seattle, USA (SEA)

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

Measurement round 2026-08-15T04:03:13Z collected 50 ICMP echo round trips from Miami to Seattle every 100 ms, yielding an 82 ms average, a 79.01 ms minimum, and a 90.39 ms maximum. Zero packet loss and 2.15 ms jitter indicate a clean long-haul connection.

The route ranked fourth among the 19 outbound routes in this set. Its 2.43 ms standard deviation is about 2.96% of the average, slightly below the 3.08% median standard-deviation-to-average ratio for those routes, so the cross-country link stays within a tight envelope.

With a 4,399.4 km great-circle distance, the fiber-floor estimate is 43.08 ms. The 82 ms average is 1.90 times that floor, and the 52.5% fiber efficiency quantifies the overhead across the long coast-to-coast span.

Latency Summary

Metric	Value
RTT	82 ms
Jitter	2.15 ms
Packet Loss	0%
Standard Fiber Floor	43.08 ms
Fiber Efficiency	52.5%
Latency Tier	Good
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: MIA → SEA

50 ICMP echo samples at 100 ms intervals · round 2026-08-15T04:03:13Z · avg 82.0 ± 0.34 ms (SE)

Sample distribution: box = interquartile range (80.3–83.2 ms), median 81.3 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 (43.1 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	79.03
2	100	83.89
3	200	83.13
4	300	84.13
5	400	80.58
6	500	79.79
7	600	81.64
8	700	80.79
9	800	85.02
10	900	81.50
11	1000	81.99
12	1100	84.16
13	1200	83.08
14	1300	80.11
15	1400	80.79
16	1500	80.96
17	1600	85.56
18	1700	82.69
19	1800	81.37
20	1900	88.76
21	2000	83.25
22	2100	81.59
23	2200	81.52
24	2300	84.23
25	2400	83.98
26	2500	83.87
27	2600	80.46
28	2700	81.37
29	2800	81.25
30	2900	90.39
31	3000	85.44
32	3100	81.05
33	3200	80.44
34	3300	80.22
35	3400	79.11
36	3500	79.03
37	3600	79.01
38	3700	81.04
39	3800	79.81
40	3900	86.75
41	4000	82.88
42	4100	80.19
43	4200	80.53
44	4300	79.63
45	4400	82.18
46	4500	80.25
47	4600	80.31
48	4700	81.31
49	4800	80.12
50	4900	79.82

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 Miami (25.77427, -80.19366) and Seattle (47.60621, -122.33207). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	4,399.4 km
Vacuum RTT floor	29.35 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	43.08 ms
Low-latency fiber material floor	42.91 ms
Engineering floor (5% path allowance)	45.24 ms
Research 1.33× mapped-fiber reference	57.3 ms
Estimated unamplified path loss	923.9 dB
Transparent optical spans / inline amplifiers	58 / 57
Published RTT inflation over fiber floor	1.9×

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	79.01 ms
Average RTT	82 ms
Maximum RTT	90.39 ms
Standard deviation	2.43 ms
Stdev / average	3.0%

RTT trend

Estimated route stability across the selected time window.

Average: 82.0 ms
Minimum: 81.3 ms
Maximum: 82.8 ms
Average loss: 0.03%

Route Context

Departure PoP: Miami (MIA)
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 Miami latency and RTT — 81.1 ms

Fastest routes departing Miami (MIA)

Miami to Ashburn latency and RTT — 27.3 ms
Miami to New York latency and RTT — 34 ms
Miami to Los Angeles latency and RTT — 56.8 ms
Miami to London latency and RTT — 100.7 ms
Miami to Paris latency and RTT — 105.4 ms

Fastest routes arriving at Seattle (SEA)

Los Angeles to Seattle latency and RTT — 27.5 ms
New York to Seattle latency and RTT — 59 ms
Ashburn to Seattle latency and RTT — 61.3 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
Seattle to Los Angeles latency and RTT — 26.6 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/mia-sea.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Miami → 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.

Miami, USA → Seattle, USA RTT