What url is the post request sent to when searching on britishairways.com?

Question

Web development

I want to make a grabber for www.britishairways.com
But Fiddler shows a bunch of hits to unknown resources after clicking on search in the search form (post request).
It was not possible to find the url to which Post-data is sent.
Is it so confusing on purpose?
Has anyone done similar tasks?
Or maybe there are such tools like open api on this site, so as not to take a steam bath?
There is also such a link:
ru.stackoverflow.com/questions/438321/%D0%9F%D1%80...
But it is not clear from it where exactly to send the data. It's just some page is taken from there and that's it ... And then I'll pull the search results.
Thank you.