15 providers offer 171 broadband deals in St Athan, from £20 a month (£40 after 12 months) and up to 1,600 Mbps. Typical measured speed is 101 Mbps down and 22 Mbps up, in line with the UK download average. Full fibre is available to 80.8% of homes.
Deals for St Athan, checked and refreshed daily.
Best value broadband deal in St Athan
The best value in St Athan on full first-year cost is 4th Utility's 900Mb Full Fibre (24 Months): £264 across year one, about £22 a month. At 900 Mbps it copes with anything a household runs at once.
Best value in St Athan
£22/mo
for 12 months, then £44/mo
Cheapest broadband deal in St Athan
The cheapest deal in St Athan is 300Mb Full Fibre (24 Months) from 4th Utility at £20.00 a month for 300 Mbps. It's full fibre, so the advertised speed is the speed that reaches the router. The £20.00 is an intro price that rises to £40.00 a month after the intro window, making the real first-year cost £240.
Cheapest in St Athan
£20/mo
for 12 months, then £40/mo
Fastest broadband deal in St Athan
The fastest deal available in St Athan is Full Fibre 1.6GB from EE at 1,600 Mbps. Zen Internet matches it at the same top speed.
Fastest in St Athan
£33.99/mo
rises to £37.99 in March 2027 (+£4)
Runner-up on speed
£45/mo
No rises, no surprises.
Compare broadband deals in St Athan
£22.99/mo
rises to £26.99 in March 2027 (+£4)
£23/mo
No rises, no surprises.
£23.99/mo
rises to £27.99 in March 2027 (+£4)
£25/mo
rises to £29 in April 2027 (+£4)
Broadband providers in St Athan
15 providers serve St Athan including Sky, BT and Vodafone, with EE the fastest at 1,600 Mbps.
Ranked by Ofcom complaints per 100,000 customers, fewest first. A down arrow is below the industry average, up is above, and a dash means Ofcom publishes no figure for that provider (usually because it is below Ofcom's 1.5% market-share reporting threshold). A small diagonal arrow shows the past-year trend (↘ improving, ↗ getting worse).
Ofcom records the typical St Athan download speed at 101 Mbps.
Upgrade nudge
Room to upgrade in St Athan
Only 10% are on 300Mbps or faster, even though 81% can get gigabit.
The faster line is already there. For most of these homes it is the contract holding them back, not the infrastructure.
Is your broadband good enough?
The typical St Athan line runs 101 Mbps.
Working from home
OKStreaming and family use
GoodWhat speeds are people actually getting?
Gigabit reaches 81% of St Athan, and the fastest available is 1,000 Mbps. The full split by band is below.
What broadband coverage does St Athan have?
Superfast broadband reaches 96% of St Athan premises but gigabit only 81%, so around 15% of homes can get fast broadband but not the fastest.
Can I rely on mobile broadband in St Athan?
Outdoor 5G reaches 100% of St Athan homes. Here is how mobile holds up if the line drops.
The two 5G figures differ. “5G availability” is everyday 5G running on the existing 4G core, which is what most phones show. “Next-gen 5G” is standalone 5G: a full 5G network with lower lag, still reaching fewer places.
5G & 4G home broadband
Outdoor 5G covers 100% of St Athan, enough for a 5G home-broadband hub to stand in for a fixed line.
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Speed and coverage figures for St Athancome from Ofcom's Connected Nations data, current to January 2026. Deal prices are pulled live from providers. Compiled by the FindBroadband team. See how we rank and source our data.