Which eSIM to choose for traveling to London in 2026? Here is our comparison of the best plans to stay connected at a low cost as soon as you arrive at Heathrow, Gatwick or Stansted. Discover our selection with promo codes and data plans.
London is a must-see metropolis: museums, theatres, parks and nightlife. To get around, book online and stay in touch, a London eSIM (or UK eSIM) is ideal. Avoid roaming and be connected as soon as you land.
Personalised selection with promo codes & direct links, then reminders before you leave
1000 plans found · Last update:
| # | Plan | Data | Duration | Price/GB | Promo code | Price |
|---|---|---|---|---|---|---|
1 |  30 days - 10GB5G Saily | 10.00GB | 30 days | $1.82 | -10% | $18.16$20.18 |
2 |  United Kingdom GoMoWorld | 15.00GB | 30 days | $0.72 | -10% | $10.78$11.98 |
3 |  United Kingdom – 7 jours GigSky3 | 1.00GB | 7 days | $5.55 | -15% | $5.55$6.53 |
4 |  Europe Yesim | Unlimited | 15 days | ∞ | -15% | $34.28$40.33 |
5 |  7 jours - Data illimitée Holafly | Unlimited | 7 days | ∞ | -5% | $27.85$29.32 |
6 |  Europe 7 days 5GB Voyeglobal | 5.00GB | 7 days | $1.40 | -20% | $6.98$8.72 |
7 |  United Kingdom 3 GB for 15 days5G LinkeSIMVodafone | 3.00GB | 15 days | $0.83 | - | $2.48 |
8 | United Kingdom – 7 jours GigSky3 | 0.49GB | 7 days | $0.00 | -15% | $0.00 |
9 |  1 TB, Unlimited Call & SMS - 30 Days5G RoamifyO2 | 1000.00GB | 30 days | $0.06 | -5% | $61.75$65.00 |
10 | 1 TB, Unlimited Call & SMS - 30 Days5G RoamifyO2 | 1000.00GB | 30 days | $0.06 | -5% | $61.75$65.00 |
11 |  Uk Forfait eSIM prépayée - 2Go/mois | Ubigi Ubigi | 24.00GB | 360 days | $1.19 | -10% | $28.45$31.61 |
12 | 500 GB, Unlimited Call & SMS - 30 Days5G RoamifyO2 | 500.00GB | 30 days | $0.11 | -5% | $57.00$60.00 |
13 | 500 GB, Unlimited Call & SMS - 30 Days5G RoamifyO2 | 500.00GB | 30 days | $0.11 | -5% | $57.00$60.00 |
14 | 500 GB - 30 Days5G RoamifyO2 | 500.00GB | 30 days | $0.11 | -5% | $57.00$60.00 |
15 | 500 GB - 30 Days5G RoamifyO2 | 500.00GB | 30 days | $0.11 | -5% | $57.00$60.00 |
After comparing all offers available in our comparator, here are our recommendations according to your travel profile. Exact prices are displayed in the comparison table above.
For a long weekend in London, a 1–2 GB plan over 7 days is enough for messaging, maps and browsing. Check the table above for up-to-date offers.
A 3–5 GB plan over 30 days is suitable for social networks, GPS and bookings. UK eSIMs cover London and the entire country (EE, Vodafone, O2, Three).
One UK eSIM is enough for your whole trip. The comparator above lists all options and durations.
London has excellent 4G and 5G coverage. International eSIMs connect to EE, Vodafone, O2 or Three networks. Tube, bus and tourist areas are well covered.
Use our promo codes to save on your UK eSIM.
To compare all UK plans: eSIM United Kingdom.
Developer and digital nomad, I lived between Canada and the United States before continuing to explore the world. After struggling with internet connectivity abroad one too many times, I created eSIM Planet to compare plans clearly and honestly. Every article is carefully written and reviewed to save you time and money.
