The multi-channel marketing campaign, called "Travel Now with British Airways", will run throughout September and October.
If Only will provide a selection of marketing materials to help agents "engage their customers", from flyers for direct distribution to a range of social media offers.
The tour operator will also provide trade partners and their customers with offers priced with BA, for destinations accessible to the UK travel market as and when they open.
To support travel agents in driving BA bookings, If Only has also created a campaign hub on Google Drive, which contains downloadable posters and information regarding current Covid-19 protocols.