WOW Air tends to make things look good with one-way prices in advertisements, but even after clicking through the roundtrip prices (including taxes) are enticing. From Boston, you can get to Reykjavik for just $250. From Los Angeles and Miami, it's only $260. Out of San Francisco and Washington D.C., tickets are $300. There are also $320 tickets from New York City and $370 tickets from Pittsburgh available in the sale.
There are frequently reasonable prices on trips to Iceland, but $250 is a good price in the summer. However, remember that WOW Air is a budget airline, which means to truly take the trip at the stated ticket price, you'll need to travel with a light carry-on. Their baggage fees can add up quickly.