Starting tomorrow, Orbitz is having a $50USD off $100USD promotion, for bookings until June 30, 2016. There is no minimum night restriction.
Although this is not as excellent as their previous $100 off promotion, I doubt we’ll see that anytime soon, and this is an excellent deal to grab. To use this offer, use code “MASTERPASS” and pay with Masterpass. Note that the promotion ends after a number of uses, so I’d grab this fast.