Secrets to booking a cheap flight to Europe

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The Charles Bridge in Prague.

The Charles Bridge in Prague. less

As the euro falls against the dollar and the weather warms, now is the time to book a trip across the pond. But a favorable exchange rate won't help you get there for less. That's where we come in. Here are seven tried-and-true booking strategies for nabbing the absolute cheapest flight to Europe.

Depart Wednesday, return Tuesday

We've all heard this sage advice before, but now we have solid proof to corroborate the claim. Kayak's 2015 Travel Hacker Guide cements what was once just a theory: Hop across the pond on a Wednesday and return home on a Tuesday for the absolute cheapest Europe flight.

The OTA giant employed a year's worth of search data to tell us that the least popular days to travel are indeed the cheapest. Debate over. Travel from Wednesday through Tuesday for the biggest savings (and since no one's traveling then, you'll possibly get an empty seat next to you).