eSIM vs roaming in Greece: the real cost math

Roaming charges are the most quietly expensive part of any trip to Greece. Here is the actual arithmetic for three realistic usage profiles, using typical 2026 price points — and where a travel eSIM lands in each scenario. Prices below are illustrative; the live comparison table always has current numbers.

Scenario 1: the light user (1 GB/week)

Maps, WhatsApp, a bit of Instagram, hotel Wi-Fi for everything else.

• US carrier travel pass: typically $10/day, capped at 2 GB high-speed monthly on many plans. One week ≈ $70.
• UK/EU roaming: EU residents roam free within the EU with fair-use caps; non-EU UK carriers charge £5–8/day passes. One week ≈ £35–56.
• Greek local prepaid: smallest Cosmote data packages start around €10 for a month. Plus the store visit and passport registration.
• Travel eSIM: a 1 GB pack from GigSky or easySim runs €2–4.

Winner: the eSIM, by an order of magnitude.

Scenario 2: the typical tourist (5–10 GB/week)

Navigation all day, social media, video calls home, some streaming on the beach.

• US carrier: same $10/day — still ≈ $70/week, now with throttling risk by day 5.
• UK/EU: £5–8/day passes again, ≈ £35–56.
• Local prepaid: Cosmote’s mid-tier prepaid covers this comfortably for €12–20/month.
• Travel eSIM: 5–10 GB packs from easySim or Airalo land at €9–19, per our comparison.

Winner: eSIM and local prepaid are close; the eSIM wins on setup time, the prepaid wins if you also want a Greek phone number.

Scenario 3: the remote worker (50+ GB/month)

Daily video calls, constant hotspot, real streaming.

• US carrier: capped high-speed then throttled — work suffers after the cap. Roughly $280/month.
• Local prepaid: unlimited-ish Cosmote prepaid bundles run €25–35/month with a store visit.
• Unlimited travel eSIM: easySim unlimited, or Holafly (unlimited but no tethering) at €9.80–70.90 for the trip.

Winner: unlimited eSIM (easySim-style) — unless you are already passing a Cosmote shop, in which case local prepaid ties on price and adds a Greek number.

The patterns that matter

1. Day-pass roaming is priced for business travelers. If you use even moderate data, per-day rates crater the moment you do the math per GB: $70/week for 2 GB is $35/GB, versus €1.5–2/GB on a decent travel eSIM.
2. Local prepaid wins only on phone numbers and very long stays. For data alone, installation friction outweighs the small price advantage.
3. “Unlimited” divides into two products. Unlimited-with-hotspot (remote-work grade) and unlimited-without-tethering (phone-only). Check the hotspot row before buying — our table shows it per plan.

Run your own numbers with the current Greece eSIM comparison — then read how much data a Greek trip really uses for the usage data behind these profiles.