Best eSIM for Argentina and Brazil
Short answer
Both are well covered individually, and South America regional bundles usually beat buying twice.
One plan or two, priced live
One plan wins. Measured at a comparable trip size (at least 3 GB over 7+ days), the cheapest eSIM covering Argentina and Brazil together is $14.00, against $19.35 for two single-country plans — cheaper by $5.35, and it saves managing two eSIMs across a border.
One plan covering both
$14.00
Airalo · 3 GB · 7 Days
293 plans cover every country in this trip
A plan in each, separately
$19.35
Argentina $10.00 · 3 GB · 7 Days
Brazil $9.35 · 3 GB · 15 Days
Why this pairing needs thought
Argentina and Brazil are the two largest markets in South America and both are well served by travel eSIMs. The complication is distance rather than roaming politics: these are enormous countries, itineraries between them cover long stretches, and Mercosur membership does not create any roaming benefit that applies to travel eSIMs.
Check the South America regional bundles first. Because both countries are large, popular and competitively priced, regional plans covering the continent are usually good value and save managing two plans across a border crossing. The comparison below shows whether that holds today.
Plans that cover the whole trip
Verified against each plan's own coverage list — every plan below names all 2 countries, not just the region.
South America (6 areas) 1GB/Day
South America (6 areas) 1GB 7Days
Latamlink - 1 GB
South America (6 areas) 1GB/Day FUP
Caribbean (20+ areas) 500MB/Day
Latin America 1GB
Or buy each country separately
Argentina and Brazil: common questions
Coverage is read from each plan's own country list at page load, so “covers the whole trip” means the plan names every country — not that it is marketed for the region. Always reconfirm at checkout. Updated for 2026.