- Time bars (incredibly handy for optimising for things like tight connections, which can be essential when flying international and missing a connection means being stranded for a day): https://i.imgur.com/RteViUF.png
- Multiple departure/destination airports (you can search SFO,SJC,OAK to LGB,LAX,SNA and back in a single search). To be fair Google supports this on desktop too (but doesn't on mobile).
- Better search for return flights with variable stay lengths (Google only does a 5x5 matrix, ITA Matrix does a full month).
However, perhaps the biggest downside is that you can't actually book through ITA Matrix. It only finds the fare, you have to find it elsewhere to actually buy it (although Hipmunk takes routing codes, which makes it easier)
- Multiple departure/destination airports (you can search SFO,SJC,OAK to LGB,LAX,SNA and back in a single search). To be fair Google supports this on desktop too (but doesn't on mobile).
- Better search for return flights with variable stay lengths (Google only does a 5x5 matrix, ITA Matrix does a full month).
However, perhaps the biggest downside is that you can't actually book through ITA Matrix. It only finds the fare, you have to find it elsewhere to actually buy it (although Hipmunk takes routing codes, which makes it easier)