Best eSIM for Portugal 2026: 5 Providers Priced
Portugal 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 Portugal 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.
From a long weekend bouncing between Lisbon's hills and Porto's riverside, to a slower Algarve beach holiday or a surf trip down the Costa Vicentina, most visitors to Portugal end up renting a car, hopping intercity trains, or walking tram-heavy old towns where offline maps and live transit info matter more than they would on a package tour. All of that runs on data, and getting it sorted before landing beats hunting for a SIM shop at Lisbon or Porto airport. We checked Portugal eSIM prices on 27 October 2026 across ONE eSIM, Airalo, Holafly, Saily and Nomad, lining up each provider's cheapest plan at matching data sizes and validity windows.
Quick answer: Portugal 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 $6.00 (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 $10.00 (7 days); ONE eSIM is $11.77 (30 days). Best value: 4.3× the days of Airalo's plan for $1.77 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.
Portugal 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 $1.87 | $6.00 (3 days) | – | $7.99 (30 days) | $9.00 (30 days) |
| 5 GB | $6.55 (30 days) Cheapest, saves $0.95 | $7.50 (7 days) | – | $9.99 (30 days) | $10.00 (30 days) |
| 10 GB | $11.77 (30 days) Best value: 4.3× the days for $1.77 more | $10.00 (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 | – | $27.99 (30 days) | $20.00 (30 days) |
Holafly sells only unlimited plans for Portugal, 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 Portugal
| Provider | 7 days | What you get |
|---|---|---|
| ONE eSIM | $10.43 | 1 GB a day at full speed, then 512 Kbps until the next day (7 × $1.49) |
| Airalo | $27.00 | 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 $10.43. The cheapest of the others is Nomad at $25.00, which gives more full-speed data a day; compare by how much you use a day, not by the word unlimited.
Which networks power a Portugal eSIM
Every ONE eSIM plan for Portugal connects to Vodafone or NOS, both running 5G nationwide, which should carry you comfortably through Lisbon, Porto and the Algarve coast. Signal is reliably strong along the coastline and in the cities where most itineraries spend their time; drivers heading into the interior - say, a road trip through the Alentejo - may see a dip to slower speeds in a few sparsely populated stretches, same as any carrier there. ONE eSIM's Portugal lineup includes daily-cap plans alongside the fixed-term sizes in the table above, giving a plan for most trip lengths without needing to combine providers.
Which eSIM should you choose for Portugal?
- 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 $10.00 (7 days) is the cheapest at 10 GB; ONE eSIM is the best value (4.3× the days for $1.77 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.
Setting up before you land in Portugal
- Confirm your phone is eSIM-capable and carrier-unlocked.
- Install the eSIM over airport or home Wi-Fi before departure, since the QR code or activation profile needs a data connection to download.
- Land, switch on the eSIM line and turn on data roaming for it, then check you have signal before heading out of the terminal.
Portugal eSIM FAQ
- Will my eSIM work on an Algarve-to-Lisbon road trip? Yes - both of ONE eSIM's network partners, Vodafone and NOS, carry 5G along the coast, though rural inland stretches may run slower.
- Is there a plan sized for a short surf trip to Ericeira or Peniche? Yes, ONE eSIM's cheapest 1 GB plan runs 7 days for $1.57, enough for maps and messaging on a quick coastal trip.
- Do I need to buy a new eSIM if my Lisbon weekend turns into a longer stay? Not necessarily - check the 3 GB (15 days) or 5 GB (30 days) ONE eSIM plans in the table before buying a top-up.
- What happens if I use up my daily data allowance on a ONE eSIM daily plan? Speed drops to the reduced rate shown in the unlimited-data table rather than cutting off, so you stay connected at a slower pace.
How we check prices
We read each provider's public Portugal 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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