Athens and a Greek island holiday do not automatically need separate data plans. An onward trip to Albania does change the coverage requirement. Compare Greece country prices first, then check the actual destinations in a regional plan. If your existing mobile contract already includes enough travel data, buying another plan may be unnecessary.
Prices checked 10 October 2026.
Compare the same data allowance and validity
The fixed-data table uses total allowances with 30-day validity. Every figure is a public price in EUR. A larger allowance does not reset each day, and the price alone says nothing about reception.
| Provider | 5 GB / 30 days | 10 GB / 30 days | 20 GB / 30 days |
|---|---|---|---|
| Horizon | €2.58 | €4.97 | €9.75 |
| Airalo | €11.00 | €18.50 | €32.50 |
| Nomad | €9.78 | €16.00 | €18.66 |
| Saily | €12.49 | €20.49 | €31.99 |
At 10 GB / 30 days, Horizon costs €4.97; Nomad lists €16.00, a difference of €11.03. Compare all the rows before choosing: these are dated quotes for the listed offers, not a ranking of every provider or every possible discount.
Keep ferry days out of the coverage promise
A country plan’s allowance can cover time in Athens and on Greek islands where supported mobile networks are available. The ferry crossing is a separate reception question. Download boarding details and maps before travelling, and do not rely on continuous mobile service at sea.
For a holiday with frequent accommodation changes, mobile data is most useful between Wi-Fi connections: finding the next address, checking messages and arranging a transfer. Save large photo uploads for a suitable connection if you want to stretch a fixed pool. A higher data allowance cannot improve reception in a sheltered bay or inside a building.
Adding Albania changes which regional plan fits
Horizon’s Europe plan lists 10 GB / 30 days at €7.27, but its checked country list excludes Albania. The Balkans plan includes Greece and Albania at €11.68 for the same shared allowance and validity. Kosovo is excluded and requires its own plan.
Greece alone costs €4.97 for 10 GB / 30 days, so the Balkans option adds €6.71. It can make sense when both countries are real stops, but it adds no useful country coverage for a Greece-only holiday. Verify each border crossing against the selected plan’s list rather than buying on the region’s name.
Unlimited phone data and hotspot are different
Holafly publishes a 7-day unlimited plan at US$27.50 in its USD duration table. The same page specifies 1 GB per day for hotspot sharing. That can suit heavy use on the phone, but it is not unlimited laptop data. The allowance, duration and currency differ from the fixed EUR plans above, so no percentage saving is calculated against it.
Hotspot sharing is free on every Horizon plan.
A laptop or another device uses the purchased pool alongside the phone. Include photo backups, software updates and video meetings in your estimate. For an unlimited plan from another provider, read its current fair-use and hotspot terms before buying.
Horizon plans have no throttling.
Actual reception and speed still depend on the supported network, location, phone and congestion. This article does not contain route tests or speed measurements.
Check the phone before paying
Check device compatibility and that the phone is unlocked. Follow the installation guide over a stable internet connection before departure. Keep the eSIM installed while troubleshooting; deleting it is not a routine connection fix.
Validity does not start until your eSIM first connects to a supported mobile network at your destination.
Horizon’s listed plans are data-only. A data connection is different from a local phone number, ordinary calls or SMS. Your home carrier may still charge for calls, texts or data on its own line. Review both lines’ settings rather than assuming the travel plan changes your home contract.
Support, sources and the limits of this comparison
Horizon offers 24/7 human support in all languages, with guaranteed instant replies.
Contact Horizon support with setup or plan questions. An instant reply is not a promise of instant resolution. The refund policy explains purchase verification and how a refund is returned.
This comparison is written by Horizon; editorial owner: Lurian Kasumaj. Provider names link to the official product pages checked on 10 October 2026. EUR prices are the providers’ displayed euro prices, not our currency conversions. Holafly’s separate quote remains in USD. Public sale prices are included where labelled; subscriptions, account rewards and coupon codes are excluded. Recheck the selected plan and checkout before paying.
Short answers
Does 30-day validity mean I must stay for 30 days?
No. It is the expiry window after service begins, not a minimum stay. Compare the shorter plan’s actual price before assuming it costs less, and allow for your arrival and departure dates.
Is 10 GB a daily allowance?
No. In this comparison, 10 GB is the total pool for the plan. Sharing it with another device does not create a second allowance. Check your own recent mobile-data use and leave room for travel days.
