Amtrak is making it easier to get up and down the East Coast this summer with a sale offering at least 25 percent off Flex fares in the region.

The sale is valid on travel from June 28 to Sept. 2 on Northeast Regional Coach tickets and Acela Business Class tickets to select cities between Boston and Washington, D.C., the rail company told Travel + Leisure.

To take advantage, travelers must purchase their tickets by June 20.

And with no blackout dates, travelers can snag discounted tickets on summer holiday travel for popular weekends like July Fourth and Labor Day.

“In addition to spending less on travel, Amtrak customers experience a convenient and comfortable trip that also minimizes their carbon footprint whether it’s to visit friends and family, head to the beach or travel for work,” the company wrote in a statement shared with T+L.

Travel between Boston and Providence with tickets starting as low as $15 each way, or travel between either Boston and New York City or Washington D.C. and New York City for as low as $42 each way. Travelers can also splurge for an Acela Business Class ticket starting at just $63 between Philadelphia and New York City, or starting at just $75 between Boston and New York City.

On board, travelers riding in Acela Business Class can enjoy a recently revamped cafe menu with options like overnight oats, pastries from local regional bakeries, charcuterie plates, and more.

In addition to saving with the sale price, the promotion can be combined with other everyday discounts like half-off child fares, according to Amtrak. 

Beyond this sale, Amtrak is increasing its East Coast options by bringing back (and expanding) its popular seasonal Berkshire Flyer train between New York City and the Berkshires.

Last year, Amtrak changed its fare structure, introducing two fare options of “value” and “flex” and eliminating the previous options of “saver,” “value,” and “flexible” fares.