On my last trip to Europe I took the following 8 flights in just under 3 weeks (actually 10 since we had to stop in Toronto on the Winnipeg-London route). In February 2017 I had gone to Europe for 3 weeks with a carry-on so I knew I could do it. 1/ Carry-on used in February 2017. 2/ Carry-on used November 2017. Money The difference this time was that I chose to bring a backpack instead of a rolling suitcase. I knew that going with only a carry-on I would save money, but I was curious about how much money. I checked all the airlines’ websites and came up with…