The latest flights into Santander International Airport (SIA) are expected to depart at 9:00am local time (16:00 GMT).
A few hours earlier, the number of flights into SIA dropped to just 11.
The number of departures is still around 3.5 million, according to the airlines website, and has dropped slightly from the peak of 16 million flights in mid-November.
SIA will continue to operate with a maximum capacity of 10,000 passengers per day, the airline said in a statement.
However, flights into and out Santander will not be limited to the usual routes, the airport’s website says.
There will be some exceptions, the website says, noting that the airport does not offer direct flights to and from the UK or Europe.
Some flights will be diverted to the airport from London, with some flights being scheduled for Thursday morning, the statement said.
Other flights will continue as normal.
The airport is a major hub for international flights, with more than 30 million passengers entering and leaving every year, according the airlines.