The currency in which the flights will be charged will always be displayed on the purchase page before swiping to pay. Changing your display currency is a good way to see a price estimate in your home currency, but the true currency of billing will be confirmed before purchase. 

If you place a booking in a currency other than your bank's currency, you might incur a foreign transaction fee from your bank. Hopper does not charge any foreign transaction fees but we recommend that you check with your bank or credit card company to see if they do to avoid any frustrating surprises!

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