Some time ago Google Flights changed their URL. Before it was possible to search flights directly by entering a specific URL. Unfortunately now there is an encoded URL. As far as I've seen this URL is encoded in base64 (see: https://stackoverflow.com/questions/...ts-search-urls).

I'm interested in doing Google Flight search via my own form (made in Google Spreadsheets) and then getting to the Google Flight search result by clicking on a hyperlink that I created on the google spreadsheet. I used to do this before Google encoded the URLs. Does somebody know how to encode via Google Spreadsheet and how to implement this?

I guess this question might be also interesting for the developpers who maintain ITA-Matrix-PowerTools. The Google Flight hyperlink there doesn't work since Google introduced encoded URL.