Best eSIM for Belgium 2026: 5 Providers Priced
Belgium eSIM prices checked 27 Oct 2026: ONE eSIM is cheapest at 3 of 5 sizes from 1 to 20 GB, from $1.57 for 1 GB.
Short answer: ONE eSIM has the cheapest 1 GB eSIM for Belgium at $1.57 for 7 days; the next cheapest is Saily at $3.99. Prices checked 27 October 2026 across ONE eSIM, Airalo, Holafly, Saily and Nomad; the full table is below.
Belgium is a compact trip: Brussels for the Grand-Place and the EU quarter, Bruges and Ghent an hour away by train, Antwerp for fashion and diamonds, and the Ardennes for a weekend in the hills. Data matters for the SNCB train app, for restaurant bookings in Bruges and for the map that gets you out of Brussels Midi. Belgian SIMs need ID registration since 2016; an eSIM is live on the train from Zaventem. On 27 October 2026 we checked Belgium eSIM prices across ONE eSIM, Airalo, Holafly, Saily and Nomad, lining up the cheapest plan at or above each size so the comparison is like for like.
Quick answer: Belgium eSIM prices by size
- 1 GB: ONE eSIM at $1.57 (7 days); next cheapest is Saily at $3.99 (7 days).
- 3 GB: ONE eSIM at $4.13 (15 days); next cheapest is Airalo at $5.50 (3 days).
- 5 GB: ONE eSIM at $6.55 (30 days); next cheapest is Airalo at $7.50 (7 days).
- 10 GB: Airalo is cheapest at $11.00 (7 days); ONE eSIM is $11.77 (30 days). Best value: 4.3× the days of Airalo's plan for $0.77 more.
- 20 GB: Airalo is cheapest at $18.50 (15 days); ONE eSIM is $22.55 (30 days). Best value: 2× the days of Airalo's plan for $4.05 more.
Belgium eSIM prices compared (1 GB to 20 GB)
| Data | ONE eSIM Our price | Airalo | Holafly | Saily | Nomad |
|---|---|---|---|---|---|
| 1 GB | $1.57 (7 days) Cheapest, saves $2.42 | $4.00 (3 days) | – | $3.99 (7 days) | $4.50 (7 days) |
| 3 GB | $4.13 (15 days) Cheapest, saves $1.37 | $5.50 (3 days) | – | $7.99 (30 days) | $9.00 (30 days) |
| 5 GB | $6.55 (30 days) Cheapest, saves $0.95 | $7.50 (7 days) | – | $10.99 (30 days) | $12.50 (30 days) |
| 10 GB | $11.77 (30 days) Best value: 4.3× the days for $0.77 more | $11.00 (7 days) Cheapest | – | $16.99 (30 days) | $16.00 (30 days) |
| 20 GB | $22.55 (30 days) Best value: 2× the days for $4.05 more | $18.50 (15 days) Cheapest | – | $25.99 (30 days) | $20.00 (30 days) |
Holafly sells only unlimited plans for Belgium, so it has no price in the GB rows; its 7-day plan is in the week table below.
A week of unlimited data in Belgium
| Provider | 7 days | What you get |
|---|---|---|
| ONE eSIM | $11.20 | 1 GB a day at full speed, then 512 Kbps until the next day (7 × $1.60) |
| Airalo | $21.00 | 3 GB a day at full speed, then 1 Mbps (fair use) |
| Holafly | $27.50 | No daily cap; fair use may slow very heavy use |
| Saily | $26.99 | 5 GB a day at full speed, then up to 1 Mbps |
| Nomad | $25.00 | 2 GB a day at full speed, then 1 Mbps |
For a week, ONE eSIM's 1 GB a day plan is the cheapest way to stay online all day at $11.20. The cheapest of the others is Airalo at $21.00, which gives more full-speed data a day; compare by how much you use a day, not by the word unlimited.
Which networks power Belgium eSIMs
In Belgium, ONE eSIM plans run on Base, Orange and Proximus, with 4G and 5G depending on the plan and your device. Every plan names its network and generation before you pay, so you can pick the operator you want. Coverage follows each carrier's own build, so expect the strongest signal in the cities and along the main roads and rail lines, and check the plan's network if you are heading somewhere remote.
Which eSIM should you choose for Belgium?
- Short trip, light use (up to 3 GB): ONE eSIM's 3 GB plan at $4.13 (15 days), the cheapest at that size.
- Two weeks or more (5 to 10 GB): Airalo at $11.00 (7 days) is the cheapest at 10 GB; ONE eSIM is the best value (4.3× the days for $0.77 more).
- Heavy use (20 GB): Airalo at $18.50 (15 days) is the cheapest at 20 GB; ONE eSIM is the best value (2× the days for $4.05 more).
- Streaming or video calls every day: compare the unlimited plans above by how much full-speed data each gives a day.
Getting your Belgium eSIM set up
- Confirm your phone supports eSIM and is carrier-unlocked before you buy.
- Install the eSIM over home or airport Wi-Fi before you fly; the QR code or install link needs a working connection to download.
- Land in Brussels or Charleroi, switch on the eSIM line and enable data roaming, then check for a signal from Base, Orange and Proximus before you head for the taxi rank or the train.
Belgium eSIM FAQ
- Does a Belgium eSIM work in the Netherlands, France and Luxembourg? Not a Belgium-only plan. The borders are minutes away by train; for Amsterdam, Lille or Luxembourg City pick a Europe plan that lists every country on your route.
- Will the eSIM work on the train between Brussels, Bruges and Antwerp? Yes. The main lines are covered on all three networks, including the tunnels under Brussels, so the SNCB app and your tickets work for the whole ride.
- Can I keep my home number active alongside a Belgium eSIM? Yes. Most modern phones run two lines, so your home number stays available for calls and texts while the eSIM carries the data.
- Which networks does a Belgium eSIM connect to? ONE eSIM's plans use Base 4G, Orange 4G, Proximus 5G; the other providers in this comparison may use different local partners.
- How much data do I need for a week in Belgium? For maps, messaging and photos, 3 GB is enough for most people; add a bigger plan or the daily unlimited option if you stream or work on video calls.
How we check prices
We read each provider's public Belgium page on 27 October 2026 and took its cheapest plan at or above each size, in US dollars before any coupon, with the validity in brackets; ONE eSIM prices are our live list prices on the same day. Prices move, so we re-check every month and keep the date on the page and in the short answer. If a number is out of date, write to support@oneesim.app and we will correct it.
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