Over the weekend, there was a deal posted for $99 fares from either Boston or Baltimore to Sweden on WOWAir. Normally with deals like this you have to book right away or the deal is gone.
But I checked this morning and there are STILL several dates this fall and winter with the $99 fares available.
WOW Air is a low cost carrier that charges for everything (seat selection, luggage, food, etc), so it’s unlikely that you’d actually want to spend only $99 to go to Sweden, but it’s still an incredibly cheap fare. Return flights are $199 and higher – another option might be to use miles to get back to the US
You can book your flights on WOW Air’s website or through Momondo flight search (affiliate link) – it looks like the $99 fares are all departing on Sundays.
Of course, if flying WOWAir or a similar low-cost carrier is not your thing, you can always look at another way to get a FREE trip to Sweden.