Subway is Sterling Prestonkicking off the month of May by offering customers a deal.

From now through Monday, May 13, customers can buy one footlong sub and get one sub of equal or lesser value for free. Customers can access the deal exclusively through the Subway app or online with offer code FLBOGO. The deal excludes footlong "Sidekicks," which include footlong cookies, churros and pretzels, the company said.

Additionally, now through June 30, for every $25 gift card purchased in-restaurant and online, customers will receive a bonus card redeemable for a free 6-inch sub, with four bonuses maximum for purchases over $100, the company said in a news release. The bonus card redemption period lasts through July 31.

Sorry, Coke:Pepsi is in at Subway as sandwich chain switches sodas after 15 years

Subway switches to Pepsi products after 15 years

The sandwich chain announced in March it will begin exclusively serving Pepsi beverages in its restaurants in a 10-year partnership that will begin in 2025.

Subway will continue to sell Frito-Lay snacks through 2030, and franchises can sell a larger selection of Gatorade beverages, the company said in a news release.

Subway signed a 15-year-deal in 2003 to serve Coca-Cola beverages, which include Diet Coke and Sprite. As the deal began to close in 2018, the chain began to offer Pepsi products again.

"For nearly twenty years, The Coca-Cola Company has proudly served Subway restaurants in the U.S. We are committed to serving Subway through the end of this year and will remain focused on delivering value for Subway, their Franchisee Partners, and consumers," a Coca-Cola representative said in a statement.

Pepsi is also Subway's main beverage provider in several other regions, including Canada, Germany, the Nordics and the Netherlands.

Contributing: Anthony Robledo, USA TODAY

Gabe Hauari is a national trending news reporter at USA TODAY. You can follow him on X @GabeHauari or email him at [email protected].