We've found lots and lots of Megabus tickets for $1, including busy routes such as DC to NYC and Los Angeles to Vegas. These low fares are even available for peak travel times, which could often cost you as much as $50 a seat.
$1 Megabus Tickets Timeframe: 27. Aug. 2019 - 17. Jan. 2020
Though you can book directly with Megabus, we find the Wanderu site to be easier to use. Just click the link below and check if the route you want is on sale. Keep in mind that you'll have to pay a reservation fee of $2.50.