Delta Air Lines is offering free margaritas to customers of age on flights from Atlanta to Los Angeles and Seattle on Wednesday, as a toast to the airline’s partnership with Tequila Avion.

According to Tequila Avion, Atlanta-based Delta serves an average of more than 1,000 margaritas a day and 1 million of its margaritas have been sold on board Delta flights so far.

The free margaritas will also be served on flights from New York’s John F. Kennedy airport to Los Angeles and San Francisco.