Belgium eSIMs: the country least likely to need its own SIM

Three reasons to close this page

Most country hubs on this site start by telling you what to buy. This one starts by arguing you probably should not buy anything, because Belgium stacks up an unusual number of reasons not to.

One: it is in the EU. An EU or EEA number roams in Belgium on your home allowance, capped only by your own operator's fair-use limit. Given how many visitors arrive from the Netherlands, France, Germany and the UK's nearest neighbours, that covers a very large share of arrivals outright.

Two: almost nobody goes only to Belgium. Brussels is a two-hour train from Paris, Amsterdam, Cologne and London. Belgium is very often the middle leg of something longer. Buying a plan that stops working the moment your train crosses into the Netherlands is a poor way to spend money — price a multi-country European plan instead and compare it on cost per gigabyte across the whole route. Our cheapest eSIM ranking is built for that comparison.

Three: the trip is short and the wifi is everywhere. The standard Belgian itinerary — Brussels, Bruges, Ghent, Antwerp — is four dense cities within an hour of each other, usually done over a long weekend, largely on foot, with hotel and café wifi covering the evenings. The mobile data involved is genuinely small.

If you are a non-EU visitor spending a week or more in Belgium and nowhere else, you are the exception this page is written for. Read on.

What it costs, and where the ladder breaks

Four providers sell Belgium plans in our data, and Airalo sells two tiers of its own: Belganet, and the dearer Belganet+. We hold the names and the prices for both. We hold nothing describing what the premium tier adds, so treat the gap as an unexplained surcharge rather than a known upgrade.

Every metered column above is now a checked price. The Airalo rows were read off Airalo's site on 13 August 2026, Nomad's off Nomad's on 17 August 2026, and Saily's off Saily's on 18 August 2026. Only the Holafly figures further down this page have since been verified.

Saily's column is the one that moved. We used to publish it as $8.99, $12.99 and $19.99 at 3, 5 and 10 GB with nothing above that; the real prices are $7.99, $10.99 and $16.99, and there is a 20 GB month at $25.99 we did not know about. Every one of the old figures was too high, and none had been read off Saily.

With the corrected column the shape of the table is clear. The cheapest checked plan at 5, 10, 20 and 50 GB is Airalo's Belganet tier; at 20 GB Nomad matches it exactly, at $20 and a round dollar a gigabyte. The widest gap in the Belgian data is now at 20 GB, where Saily's $25.99 is 30% more than the $20 both Belganet and Nomad charge. At 5 GB the spread runs $8.50 to $12.50, with Saily in the middle at $10.99 — a dollar and a half under Nomad, which on our old figures it was 49 cents above. Belganet+ sits above Belganet at every size.

Nothing undercuts Belganet at 50 GB. An earlier version of this page priced Nomad's plan at that size at $29, or $0.58 a gigabyte, and called it the cheapest data in the country. The figure was wrong. Nomad's Belgian 50 GB is $45, or $0.90 a gigabyte, $12.50 above Airalo's $32.50. Airalo's 50 GB at $0.65 a gigabyte is the cheapest cost per gigabyte in Belgium, and it is the size the rest of this page will tell you not to buy.

Note what happens at the very small end, where Airalo sells no 30-day plan at all and you are trading validity against price. Airalo's Belganet 1 GB is $4 for three days and its 3 GB is $5.50 for three days or $6 for seven; Nomad's 1 GB runs a full week for $4.50 and its 3 GB a full month for $9; Saily's 1 GB is $3.99 for a week and its 3 GB is $7.99 for a month, which makes Saily the cheapest way to buy either size.

Four sellers here sell uncapped data, though we can only price three of them. Saily sells unlimited plans in Belgium at five, seven, ten, fifteen, twenty, twenty-five and thirty days and we hold no price for any of them, so nothing on this page prices Saily's unlimited tier. Holafly's runs $20.50 for five days, $36.50 for ten and $50.50 for fifteen. Holafly sells six windows and no others — 3, 5, 7, 10, 15 and 30 days — so the 25-day plan this page used to list does not exist. Nomad's, now checked, runs $11 for three days, $18 for five, $25 for seven and $33 for ten. Airalo's Belganet unlimited undercuts both at every length the three share: $9.50 for three days, $15 for five, $21 for seven, $29 for ten, $42 for fifteen. Either way, that is $3 to $3.80 a day against $8.50 for 5 GB across a whole month. For a trip spent mostly walking between four small city centres, the premium is very hard to justify.

Coverage is not a decision here

Belgium is roughly 300 km across at its widest and its four main tourist cities sit inside a triangle you can drive in ninety minutes. All three operators run excellent 4G nationwide, and all three run 5G in the major cities. There is no part of the standard itinerary where the network choice changes whether your phone works.

There is one genuine exception, and it is the Ardennes. Proximus has the broadest nationwide coverage including that rural south-east, which is the only part of Belgium where the coverage argument has real terrain behind it. If your trip is Bastogne, the Semois valley or hiking in Haute Fagnes rather than Grand-Place and canals, Proximus is the one to want.

Fortunately, it is mostly not a choice you can make. Airalo publishes no host network for Belgium — it publishes none anywhere — so buying Belganet tells you nothing about whose towers you end up on, and neither Saily nor Nomad publishes one either. An earlier version of this page said Nomad's listing named Proximus and Orange against two of its plans. It does not, and that attribution has been removed. Holafly's listing names nothing. This page used to credit it with Proximus, Orange and Base — the Telenet network, the budget option domestically — and that came from our own data rather than from Holafly. Holafly publishes no host carrier for any country — we read its prices for 28 of them off esim.holafly.com on 18 August 2026 and not one names an operator. That is Holafly's own claim and we have not confirmed it.

The short version: buy on price. If you are heading into the Ardennes and want a particular network, no travel eSIM sold for Belgium will give you one. This page used to send you to Holafly's unlimited for a Proximus listing it does not make.

The passport rule makes arrival-day buying worse than it looks

Belgium requires passport or ID registration to activate a prepaid SIM, and a local SIM at the airport runs around $12.

On price alone that is competitive — $12 against Airalo's checked $13 for 10 GB over 30 days. The registration requirement is what tips it. It means a staffed counter rather than a vending machine, during opening hours, with your passport out, at the end of a flight. Belgium also has two very different arrival airports: Brussels Airport, which is large and well served, and Brussels South Charleroi, which is a budget airport a long way from Brussels and a much less reliable place to assume a telecoms counter will be open when you land.

An eSIM sidesteps all of it. It is active before you land, which at Charleroi in particular is the difference between confidently finding the shuttle bus and standing outside an airport wondering how to get to a city an hour away. If you are unsure whether your handset supports one, check the model list first.

What we would do

If your number is from the EU or EEA: nothing. This is the clearest case on the site.

If Belgium is part of a wider European trip: buy a multi-country plan, not this. The Belgian price advantage does not survive one border crossing.

If you are a non-EU visitor spending a week or more in Belgium alone: Airalo's Belganet 5 GB at $8.50 for 30 days. Four walkable cities, plentiful wifi, and $1.70 a gigabyte on a price we have checked. Step up to the 10 GB at $13 only if you are driving, tethering a laptop, or heading into the Ardennes where you will be navigating rather than following signs. Nomad's 5 GB is $12.50 for the same allowance over the same month — $4 more, on a price we have now read off its site — so there is no case for it at that size.

Do not buy 50 GB for a Belgian holiday, however good $0.65 a gigabyte looks. It is a rate for people who live there.