UPDATE: As of 4-26-08, ALL the legacy airlines matched.

Our proprietary software shows that Continental Airlines matched the United initiated increase of 2% to 5% ($6 to $80 roundtrip) across the bulk of its route system.

Additionally US Airways has matched across approximately 35% of its route system from 2% to 4%.

In other minor airfare activity:

• American continued to firm up matching in markets it left out last night
• Frontier partially matched on some of their routes
• Northwest has some minor increase matching (less than 10% of their routes)

This leaves Northwest, who has typically been one of the last to match in past increases attempts — along with a major portion of the US Airways route system - yet to match.

I would expect this matching to occur on both airlines later tonight or over the weekend.