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United Kingdom eSIMHow much eSIM data for 30 days in the United Kingdom?
✓ Prices checked 22 Oct 2026For 30 days in the United Kingdom with normal daily use, TripUtils estimates 12–18 GB. A 20 GB plan is the usual buffer. Not a live price. TfL, maps and messaging fit the normal band. This is a high-intent eSIM destination for EU visitors because home roaming is no longer automatic. Type G at 230 V needs a UK adapter.
Photo: Michal Libertowski / PexelsTravel essentials in the United Kingdom
The four things that save the most money or hassle before you go.
eSIM for the United Kingdom
Mobile data in the United Kingdom from the moment you land, instead of costly roaming. Install before you fly.
See Saily plans →Airport transfer
Pre-book a ride from the airport to your stay – or compare with a taxi or public transport on arrival.
Find a transfer →Tours & tickets
Attractions, tours and activities in the United Kingdom – compare prices on more than one site.
Browse Klook →Flight delayed?
3+ hours late or cancelled? Up to €600 per passenger under EU261, depending on distance.
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What to do next
EU roaming does not cover the United Kingdom. A 20 GB plan is the usual buffer. Open Saily and pick a live United Kingdom plan.
Saily plans for the United Kingdom — snapshot
As listed on saily.com on 22 Oct 2026, in US dollars. Prices change; the live price is on Saily.
| Data | Valid | Price (as listed) |
|---|---|---|
| 1 GB | 7 days | US$4.49 |
| 3 GB | 30 days | US$8.99 |
| 5 GB | 30 days | US$12.99 |
| 10 GB | 30 days | US$18.99 |
| 20 GB | 30 days | US$30.99 |
Saily also lists unlimited plans for the United Kingdom; the price depends on the number of days.
For 30 days at 12–18 GB (20 GB planning size), the smallest listed plan that fits is 20 GB for 30 days (US$30.99 on 22 Oct 2026).
Planning size
| Habits | 30-day range | Planning size |
|---|---|---|
| Normal (maps, messages, social) | 12–18 GB | 20 GB |
| Normal + daily video | 30–45 GB | 50 GB |
Assumptions and sources
Light 0.20 / normal 0.50 / heavy 0.95 GB per day, plus optional extras, plus about 20% buffer. No live retail prices.
School holidays and December markets lift London stays; GB still follows phone habits, not the Tube map.
These are planning ranges, not live prices.
Common questions
Is 20 GB enough for 30 days in the United Kingdom?
TfL, maps and messaging fit the normal band. This is a high-intent eSIM destination for EU visitors because home roaming is no longer automatic. Type G at 230 V needs a UK adapter. The 12–18 GB estimate plus buffer lands on 20 GB. Hotel Wi‑Fi is not counted. Streaming video on mobile is the usual reason to go larger.
Should I roam in the United Kingdom instead?
After Brexit, A1 and Drei bill the UK outside EU roaming (as of 21 Oct 2026: A1 Roaming Pass €4.90 per GB or Datenwoche 2 GB for €4.90, Drei 1 GB for €5 or 5 GB for €10). Magenta says roam like at home still applies there until further notice.
Do you show live Saily prices?
No. The plan table on this page is a dated snapshot from saily.com (22 Oct 2026); the live price is always on Saily. The GB figures are TripUtils estimates.