19 providers offer 213 broadband deals in Portstewart, from £15.00 a month and up to 2,000 Mbps. Typical measured speed is 101 Mbps down and 25 Mbps up, in line with the UK download average.
Best value broadband deal in Portstewart, Causeway Coast and Glens (BT55)
The best value in Portstewart, Causeway Coast and Glens (BT55) 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 Portstewart, Causeway Coast and Glens (BT55)
£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 Portstewart, Causeway Coast and Glens (BT55)
The fastest deal available in Portstewart, Causeway Coast and Glens (BT55) is Gig2 Fibre broadband + Netflix from Virgin Media O2 at 2,000 Mbps. Next fastest is Full Fibre 1.6GB Premium from EE at 1,600 Mbps.
Fastest in Portstewart, Causeway Coast and Glens (BT55)
Gig2 Fibre broadband + Netflix
200 Mbps upload · Hybrid Fibre-Coaxial
Best for power users & big households
£51.99/mo
rises to £55.99 in April 2027 (+£4)
Avg £54.99/mo over contract · £1320 total over 24 months
Runner-up on speed
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 Portstewart, Causeway Coast and Glens (BT55)
The cheapest deal in Portstewart, Causeway Coast and Glens (BT55) is Fast 24m from giffgaff at £5.00 a month for 200 Mbps. It's full fibre, so the advertised speed is the speed that reaches the router. The £5.00 is an intro price that rises to £25.00 a month after the intro window, making the real first-year cost £180. Comfortably faster than the UK average.
Cheapest in Portstewart, Causeway Coast and Glens (BT55)
£5/mo
for 6 months, then £25/mo
Avg £20/mo over contract · £480 total over 24 months
Compare broadband deals in Portstewart, Causeway Coast and Glens (BT55)
£5/mo
for 6 months, then £28/mo
Avg £22.25/mo over contract · £534 total over 24 months
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
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 Portstewart, Causeway Coast and Glens (BT55)
19 providers serve Portstewart, Causeway Coast and Glens (BT55), with Virgin Media O2 the fastest at 2,000 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 Portstewart, Causeway Coast and Glens (BT55) download speed at 101 Mbps.
Upgrade nudge
Room to upgrade in Portstewart, Causeway Coast and Glens (BT55)
Only 17% of the 3,200 connections here are on 300Mbps or faster, even though 99% 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 Portstewart, Causeway Coast and Glens (BT55) line runs 101 Mbps.
Working from home
OKStreaming and family use
GoodWhat speeds are people actually getting?
Gigabit reaches 99% of Portstewart, Causeway Coast and Glens (BT55), and the fastest available is 1,000 Mbps. The full split by band is below.
Which broadband networks reach Portstewart, Causeway Coast and Glens (BT55)?
The wholesale networks carrying Portstewart, Causeway Coast and Glens (BT55) broadband, from Openreach to Virgin Media and the altnets, read off the live deals.
Full-fibre altnets that have rolled out in Portstewart, Causeway Coast and Glens (BT55). They don't reach every address, but where they do, the gigabit pricing is normally sharper than the Openreach equivalent.
- CityFibre: Sky, The One Broadband
- 4th Utility: 4th Utility, Rise Fibre
Of the major networks, Openreach and Virgin Media O2 are also live here (Openreach covers virtually every UK premises, so it'll reach you).
Today's live count in Portstewart, Causeway Coast and Glens (BT55): 19 providers on the page.
What broadband coverage does Portstewart, Causeway Coast and Glens (BT55) have?
Superfast broadband reaches 100% of Portstewart, Causeway Coast and Glens (BT55) premises and gigabit 99%, on Ofcom's premise-level data.
Can I rely on mobile broadband in Portstewart, Causeway Coast and Glens (BT55)?
Outdoor 5G reaches 100% of Portstewart, Causeway Coast and Glens (BT55) homes. Here is how mobile holds up if the line drops.
How Portstewart, Causeway Coast and Glens (BT55) compares within Causeway Coast and Glens
Across 9 postcode districts in Causeway Coast and Glens, 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 Portstewart, Causeway Coast and Glens (BT55)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.