Walsh, who was formerly chief executive of both British Airways and its parent company IAG, will be giving his views on the state of the aviation sector during the event at the Crowne Plaza hotel in Glasgow.
Ruth Davidson, also known as Baroness Davidson of Lundin Links, was formerly leader of the Scottish Conservatives and is currently a Times Radio presenter.
SPAA president Mike Tibbert said: “It’s an honour to have speakers of the calibre of Willie Walsh and Ruth Davidson at our annual dinner in February.
“Although the aviation-centred economy is recovering to pre-pandemic levels, and Scottish travel agency bookings for 2023 look very healthy, there are still challenges which face the sector in the short, medium-and long-term including staff shortages, strikes and sustainability.”
SPAA, which celebrated its centenary in 2021, currently has 120 member companies from across the travel sector, as well as 92 associate members.
Tickets for the annual SPAA dinner will go on sale shortly.