Before booking a flight, consider if the rate is cheaper if paid in another currency. Often budget airlines will make you pay in the currency of the country you're departing from, but this isn't always the case. An important note when doing this: make sure you're using a credit card that is free of foreign-transaction fees, otherwise your attempts to save money doing this will be lost! Our article on money matters for world travellers can help steer you in the right direction for the best credit cards for travel.
Basic fares for transatlantic WOW air flights are usually really low an include only a flight ticket and one small personal bag with dimensions 42x32x25cm and weight up to 10 kg. You need to pay extra for everything else:  a normal size carry-on, checked baggage, seat reservation etc. Note that there is also no meal service unless you book Wow Premium fare, pre-order meal or buy snacks on board.
If you want to travel to Europe during the summer (when, admittedly, everyone else wants to travel to Europe) you definitely can’t procrastinate. “Prices typically rise through the spring and peak in June as summer arrives,” Hopper’s data science team determined. And if you plan on traveling during a summer holiday — Memorial Day, the Fourth of July, Labor Day — the best fares can typically be found at least three weeks in advance of your departure.
Airline tickets can be expensive no matter how you look at
While many theories exist around booking specifically on a Tuesday to save money, the reality is there is no consistent truth to exactly which days are cheapest to fly. Most of the time it is cheaper to leave on a weekday, though this isn't always the case. Your best strategy is to get a quick visual of prices for a whole month to see what days are cheapest for your specific route. Here's how:
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