17 providers offer 214 broadband deals in Welwyn, from £13.50 a month (£18 after 12 months) and up to 5,000 Mbps. Typical measured speed is 58 Mbps down and 13 Mbps up, 43% below the UK download average. Full fibre is available to 88.3% of homes.
Deals for Welwyn, checked and refreshed daily.
Best value broadband deal in Welwyn
The best value in Welwyn on full first-year cost is 4th Utility's 250Mb Full Fibre CityFibre (24 Months): £198 across year one, about £17 a month. 250 Mbps covers streaming, video calls and working from home.
Best value in Welwyn
250Mb Full Fibre CityFibre (24 Months)
£16.50/mo
for 12 months, then £22/mo
Cheapest broadband deal in Welwyn
The cheapest deal in Welwyn is 150Mb Full Fibre CityFibre (24 Months) from 4th Utility at £13.50 a month for 150 Mbps. It's full fibre, so the advertised speed is the speed that reaches the router. The £13.50 is an intro price that rises to £18.00 a month after the intro window, making the real first-year cost £162. Above the UK average on download.
Cheapest in Welwyn
150Mb Full Fibre CityFibre (24 Months)
£13.50/mo
for 12 months, then £18/mo
Fastest broadband deal in Welwyn
The fastest deal available in Welwyn is Full Fibre 5 Gigafast+ from Sky at 5,000 Mbps.
Fastest in Welwyn
£50/mo
No rises, no surprises.
Compare broadband deals in Welwyn
£22.99/mo
rises to £26.99 in March 2027 (+£4)
150Mb Full Fibre CityFibre (24 Months)
£18.50/mo
for 12 months, then £23.50/mo
£25.99/mo
rises to £29.99 in March 2027 (+£4)
£23.99/mo
rises to £27.99 in March 2027 (+£4)
Broadband providers in Welwyn
17 providers serve Welwyn including Virgin Media, BT and Vodafone, with Sky the fastest at 5,000 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 Welwyn download speed at 58 Mbps.
Upgrade nudge
Room to upgrade in Welwyn
Only 0% of the 1,100 connections here are on 300Mbps or faster, even though 88% 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 Welwyn line runs 58 Mbps.
Working from home
OKStreaming and family use
OKWhat speeds are people actually getting?
Gigabit reaches 88% of Welwyn, and the fastest available is 1,000 Mbps. The full split by band is below.
What broadband coverage does Welwyn have?
Superfast broadband reaches 99% of Welwyn premises but gigabit only 88%, so around 11% of homes can get fast broadband but not the fastest.
Can I rely on mobile broadband in Welwyn?
Outdoor 5G reaches 100% of Welwyn 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 Welwyn, enough for a 5G home-broadband hub to stand in for a fixed line.
More areas in Welwyn Hatfield
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Speed and coverage figures for Welwyncome 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.