It's never too early to start thinking about your 2018 New Year's resolution to travel more. WOW Air, the airline that has helped drive a price war credited for launching those sweet, sweet sub-$100 flights to Europe, is already offering $99 flights to Europe for the spring.
From Boston and Pittsburgh, you can get to Reykjavik for $99. It's not a bait-and-switch. You can get that same price on your return trip, resulting in a $199.98 round-trip ticket to see some of the world's most gorgeous scenery.
Beyond the lovely hot springs and volcanos of Iceland, you can land $150 tickets to Amsterdam, Paris, and Frankfurt right now. Those are sale prices, but the budget airline's prices are consistently cheap. So, heading out of different US cities bound for any of its 22 European destinations is worth a quick search if the deals don't apply to the city you're flying out of.