Layover Connectivity Index: which transit hubs one eSIM covers best

#	Hub	Onward countries on one eSIM	Plan families	Hub only from	Hub + UK	Hub + India	Hub + USA
1	Vienna VIE Austrian Airlines	43/45	8	$2.19	$2.19	$10.59	$10.59
2	Copenhagen CPH SAS	43/45	8	$2.19	$2.19	$10.59	$10.59
3	Helsinki HEL Finnair	43/45	8	$2.19	$2.19	$10.59	$10.59
4	Reykjavik KEF Icelandair	43/45	8	$2.19	$2.19	$10.59	$10.59
5	Delhi DEL Air India, IndiGo	43/44	6	$2.79	$10.59	home	$10.59
6	Mumbai BOM Air India, IndiGo	43/44	6	$2.79	$10.59	home	$10.59
7	Taipei TPE EVA Air, China Airlines	43/45	5	$2.79	$10.59	$2.79	$10.59
8	Amman AMM Royal Jordanian	43/45	4	$10.59	$10.59	$10.59	$10.59
9	London LHR British Airways, Virgin Atlantic	42/44	10	$2.19	home	$10.59	$5.99
10	Bangkok BKK Thai Airways	42/44	9	$2.79	$10.59	$2.79	$10.59
11	Kuala Lumpur KUL Malaysia Airlines, AirAsia	42/44	9	$2.79	$10.59	$2.79	$10.59
12	Zurich ZRH SWISS	42/44	8	$2.19	$2.19	$10.59	$10.59
13	Frankfurt FRA Lufthansa, Condor	42/44	8	$2.19	$2.19	$10.59	$10.59
14	Riyadh RUH Saudia, flynas	42/44	8	$4.79	$10.59	$6.19	$10.59
15	Jeddah JED Saudia, flyadeal	42/44	8	$4.79	$10.59	$6.19	$10.59
16	Kuwait KWI Kuwait Airways, Jazeera Airways	42/44	8	$4.79	$10.59	$6.19	$10.59
17	Madrid MAD Iberia, Air Europa	42/44	8	$2.19	$2.19	$10.59	$10.59
18	Lisbon LIS TAP Air Portugal	42/44	8	$2.19	$2.19	$10.59	$10.59
19	Rome FCO ITA Airways	42/44	8	$2.19	$2.19	$10.59	$10.59
20	Munich MUC Lufthansa	42/44	8	$2.19	$2.19	$10.59	$10.59
21	Tokyo HND Japan Airlines, ANA	42/44	8	$2.79	$10.59	$2.79	$10.59
22	Seoul ICN Korean Air, Asiana	42/44	8	$2.79	$10.59	$2.79	$10.59
23	Doha DOH Qatar Airways	42/44	7	$4.79	$10.59	$10.59	$10.59
24	Istanbul IST Turkish Airlines	42/44	7	$2.99	$2.99	$10.59	$10.59
25	Istanbul SAW Pegasus, AJet	42/44	7	$2.99	$2.99	$10.59	$10.59
26	Singapore SIN Singapore Airlines, Scoot	42/44	7	$3.19	$10.59	$6.19	$10.59
27	Hong Kong HKG Cathay Pacific	42/44	7	$2.79	$10.59	$2.79	$10.59
28	Paris CDG Air France	42/44	7	$2.19	$2.19	$10.59	$10.59
29	Amsterdam AMS KLM	42/44	7	$2.19	$2.19	$10.59	$10.59
30	Manila MNL Philippine Airlines, Cebu Pacific	42/44	7	$2.79	$10.59	$2.79	$10.59
31	Dubai DXB Emirates, flydubai	42/44	6	$5.69	$10.59	$10.59	$10.59
32	Abu Dhabi AUH Etihad Airways	42/44	6	$5.69	$10.59	$10.59	$10.59
33	Casablanca CMN Royal Air Maroc	42/44	6	$6.59	$6.59	$10.59	$10.59
34	Muscat MCT Oman Air	42/44	5	$9.29	$10.59	$10.59	$10.59
35	Bahrain BAH Gulf Air	42/44	5	$5.69	$12.19	$12.19	$12.19
36	Cairo CAI EgyptAir	42/44	5	$8.69	$10.59	$10.59	$10.59
37	New York JFK American Airlines, Delta, JetBlue	42/44	5	$4.89	$5.99	$10.59	home
38	Chicago ORD United, American Airlines	42/44	5	$4.89	$5.99	$10.59	home
39	Nairobi NBO Kenya Airways	42/44	4	$8.69	$10.59	$10.59	$10.59
40	Toronto YYZ Air Canada	42/44	4	$4.89	$10.59	$10.59	$4.89
41	Johannesburg JNB South African Airways, Airlink	42/44	3	$10.59	$10.59	$10.59	$10.59
42	Addis Ababa ADD Ethiopian Airlines	0/44	0	none	none	none	none

Prices are the lowest live plan in USD from the Slashtel catalogue, checked 7 November 2026; your card is charged in your own currency. "Hub only" includes regional plans; a single-country eSIM for the hub country can be cheaper.

Best connected today

Vienna (VIE): 43 of 45 onward countries
Copenhagen (CPH): 43 of 45 onward countries
Helsinki (HEL): 43 of 45 onward countries
Reykjavik (KEF): 43 of 45 onward countries
Delhi (DEL): 43 of 44 onward countries

Where to plan two eSIMs

At Addis Ababa (ADD) one plan covers fewer than half the onward countries, so travellers often need one eSIM for the stop and one for where they land. Phones hold several and you switch the data line in settings.

How we measure it

Every hour we read every multi-country plan in the Slashtel eSIM catalogue and the countries each one covers. For each hub we take the country it sits in, then count how many of 45 common onward countries (United Kingdom, Ireland, United States, Canada, Australia, New Zealand, India, Pakistan, Bangladesh, Sri Lanka, Nepal, Philippines and more) share at least one plan with it. A high score means a traveller changing planes there can usually buy one eSIM, install it at home on Wi-Fi, and be online both at the airport and on arrival without signing in to public wifi.

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Questions

What is the Layover Connectivity Index?

A live ranking of 42 airline transit hubs by how many of 45 common onward countries a single travel eSIM covers together with the hub's own country, so a traveller can stay online at the airport and on arrival with one QR code.

Which transit hub is best connected for one eSIM?

Today Vienna (VIE) ranks first: one eSIM covers it together with 43 of 45 onward countries. Next are Copenhagen (43), Helsinki (43), Reykjavik (43).

How is it measured?

Every hour we read every multi-country eSIM plan in the Slashtel catalogue, list the countries each covers, and count the onward countries that share at least one plan with the hub's country. Prices are the lowest live plan in USD, before your card converts it.

Can I use the data?

Yes, with a link to slashtel.com/layover-connectivity-index as the source.