The phrase "when pigs fly" in Maine most commonly refers to "When Pigs Fly," a well-known local bakery and pizzeria brand. There is a When Pigs Fly Bakery in York, Maine, producing a variety of all-natural breads, and a When Pigs Fly Pizzeria located in Kittery, Maine, serving wood-fired Neapolitan-style pizzas and artisan breads. The bakery was founded in 1993 and has become a notable brand in the region, while the pizzeria is popular for its fresh ingredients and craft beers. This brand embraces the whimsical phrase "when pigs fly" as its name, symbolizing something delightfully unexpected or extraordinary done in Maine. So, "when pigs fly" in Maine isn't referring to flight literally but popularly identifies a famous local bakery and pizzeria known for high-quality bread and pizza products in the state.