Latency by Connection Type: Fiber, Cable, Wi-Fi, 5G, Satellite
The access link is the first and often the most variable part of your latency. Wired Ethernet and fiber add the least and the most consistent delay; cable and DSL add a little more; Wi-Fi adds a few ms and random spikes; 4G and 5G add tens of ms and vary with signal; low-orbit satellite adds a few dozen ms; geostationary satellite adds roughly 500 to 700 ms by physics alone.
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Quick answer: the technology of your last-mile connection sets a floor under your latency and strongly affects its stability. Roughly, from best to worst: Ethernet and fiber, then cable, then DSL, Wi-Fi on top of any of them adds variation, 5G and 4G add more, low-orbit satellite is acceptable, and geostationary satellite is slow for interactive use because of the distance to orbit. Wired is always more consistent than wireless.
Why the access link matters
Latency has many components (see what is latency): propagation across distance, hops through routers, queueing and processing. The part you can most easily change, and the part that differs most between households, is the access link between your device and your ISP's network. Two people in the same city can have a 5 ms and a 60 ms floor to the same server purely because of their connection type.
Typical ranges by technology
| Connection | Typical added latency to ISP edge / nearby server | Stability | Notes |
|---|---|---|---|
| Ethernet (wired LAN) | Well under 1 ms inside the home | Excellent | Best for gaming and calls |
| Fiber to the home (FTTH/GPON) | About 1 to 5 ms to the ISP | Excellent | Symmetric, low jitter |
| Cable (DOCSIS) | About 5 to 15 ms, more at peak | Good, can vary | Shared medium; upstream congestion |
| VDSL / DSL | About 10 to 30 ms, depends on line quality and interleaving | Fair to good | Distance from exchange matters |
| Wi-Fi (5 or 6 GHz, close range) | About 1 to 5 ms extra | Fair to good | Interference, walls and contention |
| Wi-Fi (crowded 2.4 GHz) | 5 to 50+ ms extra with spikes | Poor to fair | Neighbours, microwaves, Bluetooth |
| 4G / LTE | About 30 to 60 ms (varies a lot) | Variable | Signal and cell congestion |
| 5G | About 10 to 40 ms (varies by network type) | Variable | Standalone 5G generally better than non-standalone |
| Low Earth orbit satellite | About 25 to 60 ms, with periodic handover spikes | Fair | Weather and obstructions matter |
| Geostationary satellite | About 550 to 700 ms and up | Fair | Physics limit; bad for real-time |
These are broad figures, not guarantees; individual networks vary, and the number you see to a given server also includes distance and routing.
Wired: Ethernet
A switched Ethernet link inside a home or office adds microseconds to a fraction of a millisecond. It has no radio interference and no retransmissions, so it delivers the lowest and most consistent latency. A damaged cable or a poor negotiated speed (for example stuck at 100 Mbps or half duplex) can cause trouble; use Cat5e or better and check link speed. For gaming, streaming consoles and work calls, a cable is the single most effective improvement.
Fiber to the home
Optical fiber carries light with low loss over long distances and the ISP's access network is typically point-to-multipoint (GPON/XGS-PON) or point-to-point. Latency to the ISP edge is a few milliseconds, with very low jitter, and speeds are symmetric. Because fiber has plenty of capacity, congestion is rare, though a congested ISP uplink can still create evening slowdowns.
Cable (DOCSIS)
Cable internet shares a coaxial segment among many homes. The modem has to request time slots for sending upstream, which adds a few milliseconds and some variability. Under heavy neighbourhood load, latency and jitter rise at peak hours. Upstream bufferbloat on cable modems is common; see bufferbloat explained.
DSL
DSL runs over telephone copper. Latency is affected by line length, noise and an optional setting called interleaving, which improves error correction but adds delay (often 10 to 20 ms). Fast-path (non-interleaved) profiles have lower latency but more errors on noisy lines. Ask your ISP what profile you are on.
Wi-Fi
Wi-Fi shares radio spectrum and uses retries when frames collide or are corrupted. The average added delay can be small, but the tail is large: a retry or channel contention can add 10 to 100 ms occasionally. Factors:
- Band: 5 and 6 GHz are less crowded than 2.4 GHz but have shorter range and weaker wall penetration.
- Distance and obstacles: lower signal means lower data rates, longer transmissions and more retries.
- Congestion: neighbouring networks on the same channel; many devices on one access point.
- Power saving on devices: can add delay to the first packet after idle.
Improvement steps: place the router centrally and high, choose a clean channel, use 5 or 6 GHz for latency-sensitive devices, consider a mesh system with wired backhaul, or run a cable. Compare using a wired test to see how much the wireless hop costs (see the worked example in accuracy and limitations).
Mobile networks: 4G and 5G
Radio access on cellular networks involves scheduling, which adds delay, and the path from the cell to the internet runs through the carrier's core network, which may route you to a gateway in another city. 4G typically yields tens of milliseconds; 5G standalone with a good signal can be much lower, but many deployments still rely on 4G cores (non-standalone) and behave similarly to 4G. Latency varies with signal strength, cell load and movement. Mobile networks also use carrier-grade NAT; see IP addresses and NAT.
Satellite: geostationary vs low Earth orbit
Geostationary (GEO)
At 35,786 km altitude the one-way trip to the satellite and down to the ground station is about 72,000 km. A request and its reply need four such legs (up, down, up, down): roughly 143,000 km, which takes about 480 ms at the speed of light in vacuum. With processing, the user usually sees 600 ms or more. No technology can change this; it is why GEO is poor for gaming, calls and any interactive work, but acceptable for streaming and downloads once the connection starts.
Low Earth orbit (LEO)
LEO constellations orbit at a few hundred to a couple of thousand kilometres. The path up and down is much shorter, so latency can be a few dozen milliseconds to nearby ground stations. Moving satellites require handovers every few minutes, which can cause brief spikes. Obstructions (trees, buildings) and weather increase variation.
See also undersea cables and the speed of light for the physics.
Choosing the right connection for your use
| Use | Best choices | Acceptable | Avoid |
|---|---|---|---|
| Competitive gaming | Fiber or cable with Ethernet | Good 5 GHz Wi-Fi, LEO satellite for casual play | GEO satellite, crowded Wi-Fi |
| Video calls | Any wired link, stable Wi-Fi | 5G, LEO satellite | GEO satellite (awkward delay) |
| Streaming and downloads | Anything with enough bandwidth | GEO satellite (buffering helps) | Links with heavy data caps |
| Remote desktop, trading | Fiber with Ethernet | Cable | Mobile and satellite |
Worked example
A household on cable with Wi-Fi reports "lag". A 10-pass test to a nearby destination gives average 41 ms, best 12 ms, worst 160 ms. Connected by cable to the router, the same test gives average 17 ms, best 11 ms, worst 38 ms. The best values are nearly identical: the cable plant is fine. The 24 ms average penalty and the 120 ms worse spikes come from the Wi-Fi hop. Fix: use Ethernet for the gaming PC, move the access point, or switch to 5 GHz.
Common mistakes and myths
- "More Mbps means less ping." Bandwidth and latency are separate; see latency vs bandwidth.
- "5G always beats cable." Peak 5G is good, but stability and congestion vary.
- "Satellite is all slow." LEO and GEO are very different.
- "Wi-Fi 6 fixes interference." It improves efficiency, but physics and neighbours still apply.
What to do next
Check your current link with a latency test, then follow how to reduce latency. If your numbers vary a lot, read jitter explained.
Frequently asked questions
Is fiber always lower latency than cable?
Fiber to the home usually has lower and steadier latency than cable (DOCSIS) or DSL because of the access technology, typically a few milliseconds less and with less variation. Beyond the access network the paths are often the same, so the difference to far servers is small.
How much latency does Wi-Fi add?
A good Wi-Fi link adds roughly 1 to 5 ms in ideal conditions, but interference, distance and many devices can add tens of milliseconds and random spikes. The variation is usually a bigger problem than the average.
What latency does Starlink or LEO satellite have?
Low Earth orbit satellite internet typically has round-trip times of a few dozen milliseconds to a user near a ground station, but it varies with satellite handovers and weather. It is far better than geostationary satellite for interactive use.
Why is geostationary satellite so slow?
Geostationary satellites orbit about 35,786 km above the equator. A signal must go up and down twice for a round trip, around 140,000 km of path, which is roughly 470 ms at the speed of light before any processing, and usually 600 ms or more in practice.
Is 5G good enough for gaming?
Often yes when the signal is strong: 5G can give 15 to 40 ms to nearby servers, though it varies by network and congestion. Stability, and whether the carrier routes you to a nearby server, matter as much as the radio technology.
Does Ethernet reduce ping compared with Wi-Fi?
Usually yes, and more importantly it makes ping consistent. If best values are similar but worst values on Wi-Fi are much higher, the wireless link is the problem.