With 13,170 flights from March 2017 to February 2018, Amsterdam Schiphol-London Heathrow is Europe’s second busiest air route, air travel consultancy OAG reported on Friday.

The Schiphol-Heathrow pairing is ranked 19th in the global OAG list. Only Dublin-Heathrow with 13,390 frequencies and ranked 14th, came out higher in terms of Europe.

Topping the OAG list was Kuala Lumpur-Singapore with 30,537 connections in the 12 months to February 2018.

‘The international focus favours major airports in smaller countries that have more of a focus on international operations than domestic service,’ OAG analyst John Grant said.

‘From Singapore, for example, there are no domestic flights within that small city state – meaning every flight there is counted as international. Singapore showed up on four of OAG’s top 20 routes.’

Schiphol is Europe’s third busiest airport, after Heathrow and Charles de Gaulle in Paris. KLM and British Airways, which operate services between the two airports, carried 1,860,287 passengers on the 365-km route in the time frame.

Heathrow is one of six London airports served by daily flights from Schiphol. The others are City, Gatwick, Luton, Stansted and Southend.