Look up combined Hotel and Airfare vacations. For example on using say European Destinations which is a travel company the price for 2 including flight to Rome and back from Venice with hotels in these cities along with the train fare involved on a Friday in July is about 2400 USD. You get the drift. Of course you can look up other companies too.A package vacation is usually a better deal. If this sounds too much then by all means look up Google flights and at various dates and permutations. Full disclosure, I mention this company having used them 4 times in the last 4 years and not as an advertisement. What about trying vacation packages from United Airlines? Call them or look it up on their site. Have a nice trip.