The most surefire way to find the lowest-priced train tickets from Wilmington to Washington D.C. is to plan ahead and book your train travel earlier. In the past 30 days, the cheapest average price users have found for trains from Wilmington to Washington D.C. was $70.08. If your travel date is still a number of days out, by booking your trip 29 days before you plan to travel, you could save an average of $38.29 compared to a typical last-minute fare. Trying to save on a last-minute fare and have a bit of flexibility on what day to travel? Take a look at midweek schedules, as these tend to be less busy and are often cheaper than buying tickets to travel on Friday, or a weekend departure.