Delays at the largest hubs then spread to flights across the country.

The two go head-to-head in Chicago, one of the country's largest hubs.

These flights usually go a shorter distance to a larger regional hub.

The airport was, at the time, the largest hub for the airline.

Little room is left at the large "hubs," which four of every five passengers pass through.

It is by far the largest hub of the department.

They have large hubs, fly often to many destinations and run their own computer reservation systems.

It will be the largest commercial hub outside the city.

Towns more than 100 miles away from a large or medium hub would have to chip in on the subsidy.

It is the country's second largest economic hub and the commercial capital of Punjab.