Frankfurt, Germany to Seattle, USA ICMP RTT: 134 ms average, 128.47–150.15 ms range, zero packet loss across 50 samples.

🇩🇪 Frankfurt, Germany (FRA) → 🇺🇸 Seattle, USA (SEA)

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

Round 2026-08-15T04:03:13Z measured Frankfurt, Germany to Seattle, USA at 134 ms average ICMP RTT, with a 128.47 ms minimum and 150.15 ms maximum across 50 samples and zero packet loss.

Spanning an 8,204 km great-circle distance, the theoretical vacuum round trip is 54.73 ms and the fiber-limited floor is 80.34 ms; the observed 134 ms is 1.67 times that floor, placing fiber efficiency near 60%, a solid result for a long intercontinental path.

This route ranked 10th among the 19 outbound routes in the same round. Its 5 ms standard deviation and 3.99 ms jitter are consistent with the round's median spread of 3.08% of average latency, giving the Good tier a stable, predictable character.

Latency Summary

Metric	Value
RTT	134 ms
Jitter	3.99 ms
Packet Loss	0%
Standard Fiber Floor	80.34 ms
Fiber Efficiency	60%
Latency Tier	Good
Source Region	Europe
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: FRA → SEA

50 ICMP echo samples at 100 ms intervals · round 2026-08-15T04:03:13Z · avg 134.0 ± 0.71 ms (SE)

Sample distribution: box = interquartile range (130.0–136.7 ms), median 132.5 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 (80.3 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	138.90
2	100	135.25
3	200	130.27
4	300	135.42
5	400	135.62
6	500	131.26
7	600	136.37
8	700	130.71
9	800	139.13
10	900	150.15
11	1000	139.36
12	1100	133.18
13	1200	130.18
14	1300	128.47
15	1400	128.96
16	1500	129.34
17	1600	129.96
18	1700	132.03
19	1800	140.66
20	1900	137.89
21	2000	131.30
22	2100	130.22
23	2200	130.00
24	2300	129.02
25	2400	139.23
26	2500	149.05
27	2600	139.79
28	2700	132.33
29	2800	129.28
30	2900	129.62
31	3000	129.98
32	3100	130.51
33	3200	128.74
34	3300	132.87
35	3400	135.51
36	3500	130.43
37	3600	136.87
38	3700	133.40
39	3800	134.73
40	3900	137.66
41	4000	144.18
42	4100	134.97
43	4200	133.64
44	4300	132.64
45	4400	131.95
46	4500	129.91
47	4600	129.20
48	4700	128.60
49	4800	132.36
50	4900	138.90

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 Frankfurt am Main (50.11552, 8.68417) and Seattle (47.60621, -122.33207). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	8,204 km
Vacuum RTT floor	54.73 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	80.34 ms
Low-latency fiber material floor	80.02 ms
Engineering floor (5% path allowance)	84.37 ms
Research 1.33× mapped-fiber reference	106.85 ms
Estimated unamplified path loss	1722.8 dB
Transparent optical spans / inline amplifiers	108 / 107
Published RTT inflation over fiber floor	1.67×

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	128.47 ms
Average RTT	134 ms
Maximum RTT	150.15 ms
Standard deviation	5 ms
Stdev / average	3.7%

RTT trend

Estimated route stability across the selected time window.

Average: 134.1 ms
Minimum: 132.8 ms
Maximum: 135.2 ms
Average loss: 0.01%

Route Context

Departure PoP: Frankfurt (FRA)
Destination PoP: Seattle (SEA)
Region overview: Europe → North America
Corridor overview: Europe to North America
Full global matrix: Backbone Latency Matrix
Physical methodology: Theoretical Fiber Latency

Reverse direction

Seattle to Frankfurt latency and RTT — 133 ms

Fastest routes departing Frankfurt (FRA)

Frankfurt to Amsterdam latency and RTT — 5.9 ms
Frankfurt to Berlin latency and RTT — 6.1 ms
Frankfurt to Paris latency and RTT — 7.6 ms
Frankfurt to London latency and RTT — 12.6 ms
Frankfurt to Marseille latency and RTT — 17.2 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
Miami to Seattle latency and RTT — 82 ms
Tokyo to Seattle latency and RTT — 84.6 ms

Same corridor (Europe → North America)

London to New York latency and RTT — 63.5 ms
Amsterdam to New York latency and RTT — 68.2 ms
Paris to New York latency and RTT — 68.6 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/fra-sea.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Frankfurt → 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.

Frankfurt, Germany → Seattle, USA RTT