Airline tickets?


For Christmas I’d like to surprise my girls dad with a trip to Massachusetts, that’s where he’s originally from. He hasn’t seen his mom or grandparents in three years. I’d also like baby to meet her grandmother and great grandparents. Anyways, my question is if anyone knows how to find good priced tickets? Or airlines that you’d recommend? Also, we’re in California so if anyone has traveled to where there’s a significant time change any tips with how you got baby to handle it?

Thanks in advance!