Southwest also often uses secondary airports in major cities.

Many budget airlines use secondary or remote airports to keep costs down.

Such secondary airports can be especially inconvenient if you want to make a connection from a major carrier.

As part of its effort to control costs, Southwest sometimes uses secondary airports in cities which generally have high costs.

Travel time to some of the secondary airports can prove an obstacle.

To accommodate the growth, some secondary airports are expanding.

Several government commissions have urged expanded use of secondary airports to ease the strain on the system.

The secondary airports might also capture some of the cargo bound for their areas.

In London and other cities, United may have to fly into secondary airports.

We are installing newer, similar systems at secondary airports.