The food will be sold on more than 200 flights from Chicago and Denver, two of United's main domestic hubs.

Delta has eight domestic hubs and three international hubs.

That would reduce corporate overhead and potentially allow for fewer domestic hubs, which are expensive to maintain.

In recent years the carrier has invested heavily in establishing domestic hubs for both domestic and international traffic.

The airline has eight domestic hubs and three international hubs.

Worldport serves all major domestic and international hubs.

The station is presently a purely domestic hub.

On July 11, 2012, the airport will be a domestic hub for Delta Air Lines.

The airport is the international and domestic hub for Finnair, the Finnish flag carrier.

Chūbu Centrair International Airport has since become the main domestic and international hub for the region.