Top 10 eSIM providers for Athens in 2026
Airalo currently leads for Athens visitors in 2026. It routes traffic through Cosmote's network and delivers consistent 4G and 5G coverage from Eleftherios Venizelos airport through the Syntagma metro tunnels. The tie-breaker over Holafly is per-GB pricing. Airalo's 1 GB 7-day Greece plan runs around €4.50, roughly 30% less than Holafly's cheapest capped option.
Athens runs on 3 mobile networks. Cosmote, owned by OTE Group, has the widest footprint and tends to hold a signal through the Line 3 (Blue) metro tunnel between Syntagma station and Eleftherios Venizelos airport (ATH). Vodafone Greece runs a close second. Nova, formerly Wind Hellas, covers the urban core but drops off faster toward Cape Sounion or the Saronic Gulf ferry routes. The scoring here weights network assignment heavily. An eSIM routed through Cosmote scores higher than one on Nova at the same price, because Cosmote's 5G rollout currently covers Monastiraki, Kolonaki, Pangrati, and most of the Kifisia corridor north of the city centre. Per-GB cost matters, but coverage quality came first in the weighting. A cheap plan with dead zones around the Piraeus port terminals is no bargain when you're trying to pull up a ferry boarding pass on your phone.
The most common mistake is buying an unlimited plan before arrival and then discovering it throttles after 500 MB per day. Holafly's unlimited tier works well for maps and messaging as you walk the warm limestone streets of Plaka, but the fair-use cap means you'll struggle to video-call from your Koukaki Airbnb after a full day of Google Maps use. Another frequent error is activating too early. Most plans start their clock at first network connection, not at purchase. If you install and activate at home 3 days before your flight, you've burned 3 days of a 7-day plan before you clear passport control at ATH. Worth noting, some providers let you install the QR code without activating the data session. Airalo and Saily both support this two-step approach, which means you can set it up on the plane and switch on after landing.
Airalo is not the right pick for everyone. If you need unlimited data for remote work, the kind of steady connection you'd want as you sit in a Psyrri courtyard with iced coffee sweating through the glass, Holafly's daily unlimited plan at around €6 per day on a 10-day pass makes more sense. The per-GB equivalent cost is higher, but throttle-free video calls from Exarchia or a rooftop in Koukaki are worth it for that use case. Travelers who want a local Greek number for SMS confirmations from ferry bookings to Aegina or Hydra should skip eSIMs entirely and grab a physical Cosmote SIM at the ATH arrivals hall for about €15.
The full list
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Airalo
Routes through Cosmote's network in Athens, so you'll hold 5G from the Monastiraki flea market through the Line 3 tunnel to ATH airport. The 1 GB 7-day Greece plan runs around €4.50. QR activation takes under 2 minutes, and you can install on the plane before landing.
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Holafly
Unlimited daily data on Vodafone Greece makes this the pick for remote workers in Exarchia cafes or anyone who needs all-day connectivity around the Piraeus ferry terminals. Fair-use throttle after roughly 500 MB per day, which is fine for maps around Plaka but tight for video calls.
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Saily
NordVPN's eSIM arm uses Cosmote in Greece and tends to price around €3.99 per GB. Coverage holds well along the Line 2 (Red) metro corridor from Anthoupoli to Elliniko. The app is clean, and setup before landing at ATH takes about 90 seconds.
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Nomad eSIM
Competitive at roughly €3.50 per GB on shorter plans. Connects through Cosmote across most of central Athens, though some users report brief drops near Piraeus port. Solid for a 3-5 day trip focused on the Acropolis area, Koukaki, and Syntagma.
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Maya Mobile
Pay-per-GB model with no expiry on purchased data, routed through Vodafone Greece. A good fit if you're splitting time between Athens and the Saronic islands, since unused data carries over. Coverage in Kolonaki and Pangrati is consistent at 4G speeds.
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Ubigi
French-headquartered provider with reliable Cosmote routing in Athens. Plans start at €9 for 1 GB over 30 days. Slightly pricier per GB than Airalo, but the 30-day validity suits longer stays in neighborhoods like Kifisia or Glyfada where you might settle in for a few weeks.
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aloSIM
Budget pick at around €3 per GB. Network assignment in Athens has varied between Cosmote and Nova, which means coverage can drop on the Line 1 (Green) metro stretch between Thissio and Piraeus. Fine for a short weekend trip, less reliable for heavy daily use.
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Roamless
Pay-as-you-go at roughly €0.05 per MB in Greece, routed through Cosmote. No wasted data if you're only in Athens for 2 days before heading to the islands. The per-MB billing adds up fast past 500 MB though, so not ideal for heavy use around Omonia or Psyrri.
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Yesim
Swiss-based provider with a clean app and Vodafone Greece routing. Plans run about €5 per GB. Some users have reported unexpected auto-renewal charges, which drops the score. Coverage in central Athens from Syntagma to Monastiraki is solid, and the app supports both iOS and Android.
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SimOptions
Marketplace that resells plans from multiple carriers. The Greece options tend to route through Cosmote, and coverage around the Acropolis Museum and the Thissio pedestrian walkway is reliable. Activation takes a few more steps than Airalo, and pricing sits around €5-6 per GB for short plans.
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