16 providers offer 186 broadband deals in Portland, from £20.00 a month and up to 1,600 Mbps. Typical measured speed is 56 Mbps down and 15 Mbps up, 45% below the UK download average.
Best value broadband deal in Portland, Dorset (DT5)
The best value in Portland, Dorset (DT5) on full first-year cost is Plusnet's Full Fibre 145: £292 across year one, about £24 a month. A £155 reward card is bundled in. 145 Mbps covers streaming, video calls and working from home.
Best value in Portland, Dorset (DT5)
£22.99/mo
rises to £26.99 in March 2027 (+£4)
Avg £26.32/mo over contract · £632 total over 24 months
Fastest broadband deal in Portland, Dorset (DT5)
The fastest deal available in Portland, Dorset (DT5) is Full Fibre 1.6GB Premium from EE at 1,600 Mbps.
Fastest in Portland, Dorset (DT5)
Full Fibre 1.6GB Premium
115 Mbps upload · Full Fibre
Best for power users & big households
£33.99/mo
rises to £37.99 in March 2027 (+£4)
Avg £37.32/mo over contract · £896 total over 24 months
Cheapest broadband deal in Portland, Dorset (DT5)
The cheapest deal in Portland, Dorset (DT5) 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. Onestream is essentially level at £20.63 a month.
Cheapest in Portland, Dorset (DT5)
300Mb Full Fibre (24 Months)
300 Mbps upload · Full Fibre
Best for 4–5 person households, heavy use
£20/mo
for 12 months, then £40/mo
Avg £30/mo over contract · £720 total over 24 months
Runner-up on price
Onestream Fibre 55
10 Mbps upload · Hybrid Fibre
Best for small homes, single 4K streamer
£19.94/mo
rises to £22.69 in April 2027 (+£2.75)
Avg £22/mo over contract · £528 total over 24 months
Compare broadband deals in Portland, Dorset (DT5)
£21/mo
rises to £24 in April 2027 (+£3)
Avg £23.25/mo over contract · £558 total over 24 months
£30/mo
rises to £33.50 in April 2027 (+£3.50)
Avg £32.63/mo over contract · £783 total over 24 months
Sky Full Fibre Gigafast
100 Mbps upload · Full Fibre
Best for power users & big households
£31/mo
No rises, no surprises.
£749 total over 24 months
Onestream Fibre 55
10 Mbps upload · Hybrid Fibre
Best for small homes, single 4K streamer
£19.94/mo
rises to £22.69 in April 2027 (+£2.75)
Avg £22/mo over contract · £528 total over 24 months
Broadband providers in Portland, Dorset (DT5)
16 providers serve Portland, Dorset (DT5), 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 Portland, Dorset (DT5) download speed at 56 Mbps.
Upgrade nudge
Room to upgrade in Portland, Dorset (DT5)
Only 2% of the 3,900 connections here are on 300Mbps or faster, even though 84% 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 Portland, Dorset (DT5) line runs 56 Mbps.
Working from home
OKStreaming and family use
OKWhat speeds are people actually getting?
Gigabit reaches 84% of Portland, Dorset (DT5), and the fastest available is 1,000 Mbps. The full split by band is below.
Which broadband networks reach Portland, Dorset (DT5)?
The wholesale networks carrying Portland, Dorset (DT5) broadband, from Openreach to Virgin Media and the altnets, read off the live deals.
Independent altnets reaching Portland, Dorset (DT5), listed below. The companies that build their own fibre rather than reselling someone else's, which is often the cheapest gigabit on the street.
- CityFibre: Sky, The One Broadband, Vodafone
- 4th Utility: 4th Utility, Rise Fibre
Behind the altnets, Openreach run as the major-network options (Openreach is the default network, in case the rest haven't reached your street).
16 providers are live with broadband deals in Portland, Dorset (DT5).
What broadband coverage does Portland, Dorset (DT5) have?
Superfast broadband reaches 97% of Portland, Dorset (DT5) premises but gigabit only 84%, so around 13% of homes can get fast broadband but not the fastest.
Can I rely on mobile broadband in Portland, Dorset (DT5)?
Outdoor 5G reaches 94% of Portland, Dorset (DT5) homes. Here is how mobile holds up if the line drops.
How Portland, Dorset (DT5) compares within Dorset
Across 19 postcode districts in Dorset, by premises count, typical speed and gigabit coverage.
Nearby areas
Frequently asked questions
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* Based on Go.Compare research estimating that 28% of UK broadband users pay for faster broadband speeds than they need (which we interpret as overpaying), equivalent to around 7.5m UK households.
Speed and coverage figures for Portland, Dorset (DT5)come 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.