It’s not often you get to earn free stuff just by dropping your name, but Frontier Airlines is making that dream a reality. To celebrate Green Week, which highlights the airline’s commitment to fuel efficiency and focus on sustainability, Frontier is offering free flights — but not to just anyone. If you’re lucky enough to have the last name “Green” or “Greene,” you’ll be able to travel for free on August 13. Well, “free” actually means “up to $400.”

Flights can be one-way or round-trip, but it must be domestic. Book online through the Frontier website and you will be issued a refund for your flight up to $400 by September 15. According to the official terms, “Individuals who are eligible for this promotion will be refunded for round trip flights if both segments of travel are purchased on one Passenger Name Record, the first segment departs between 12:00AM and 11:59PM on August 13, 2019, and the return segment arrives by 11:59PM on August 20, 2019. Eligible participants will receive a full refund, up to $400.”

Unfortunately, immediate family is not eligible for the promotion, so spouses, children, uncles, and sisters-in-law won’t be able to fly for free unless their last name is also Green or Greene.