Insertion in dataset - dropdown selection

Hello,

I have an insertion with a field “from” coming from a dropdown object with a list of airport.

This field is connecting to a list:

📷

The client is selecting the airportName.

I want to be able to insert the oaci field instead of airportName.

How can I select on the first field and insert on the second field via javasript?

let flightLeg1_toInsert = {

"flightStatus": "submitted",

"from": $w("#selectionAirportFrom").value,

…};

Thanks

pym