Pro tip: if you’re booking flights online, make sure using your Mastercard doesn’t cost you an extra 50 for your flight ticket price.
It happened to me earlier this morning as I was booking a flight. I went on Kayak, found a flight I liked, clicked the link that sent me over to eDreams to book it. By the time I was ready to buy, the price had silently hopped up 50 CHF. I tried other sites. I tried the airline site directly. I couldn’t find the flight at the price Kayak advertised.
I made a last-ditch effort to book the flight, starting over from Kayak and keeping an eye on the price. I saw it had jumped as I filled in my credit card details. I looked closer. I saw a discreet notice advertising “best price using Visa credit”. Switched my Mastercard for my Visa. Bingo.