Costeaux On The Go located at the Sonoma County Airport (STS) is serving a selection of acclaimed baked goods, savory items, coffee and more. Costeaux On The Go offers provisions for those visiting area attractions or merely faced with a full day of office errands or perhaps shuttling kids between school and practices. The grab and go program features a variety of demi-sandwiches, salads, and deviled eggs, along with other savory items including our famous deep-dish quiche, breakfast croissants and eclairs.