Here are the theaters I'd check. There aren't that many of them and each only has 1-2 shows at a time. You should be able to narrow down based on preferences pretty quickly:
Studio
Woolly Mammoth
Arena Stage
Round House
Shakespeare
Signature

The TodayTix app sometimes has good discounted seats (and rush/lottery tickets as well).

Thanks. We saw another production of Godot. The Uncle Vanya tickets are pricey!

If you're interested in classics, Waiting for Godot will be at Scena Theatre and Uncle Vanya at Shakespeare Theatre.

Recommend a play in the DC area for April/May. I'm looking for tickets for a birthday gift