Search and book on Expedia using the following times of month or search on google flights for exact availability.
Availability departing Baltimore Washington International: Jan 22, 29, Feb 5, 26
Returning flights have more dates available including a 7 day itinerary.
Note: WOW Airlines is a low-cost carrier. You will have to pay for each checked baggage. Please see their website for restrictions. Fare averages $70 lower than the next cheaper flight with 2 stops. Please be sure you have a valid passport by the time of travel.
My sample travel dates: Feb 5-12 (BWI-ARN-BWI)