In the last couple of weeks, Fly.com, with a huge marketing assist from parent company Travelzoo, introduced 20 Twitter accounts, including LAFares, DCFares, CHIFares, BOSFares and SEAFares, and plans to tweet followers airfare deals from these airports perhaps three times a week.

Deal-publisher Travelzoo promoted Fly.com’s new Twitter accounts to millions of Travelzoo’s newsletter readers in e-mails with the headline, “NEW: Real-Time Fare Alerts from Your Home City,” and some of Fly.com’s accounts have already picked up around 2,500 followers.

The development signals that a battle royale is under way between Fly.com and fellow flight-metasearcher FareCompare and others for the hearts and minds of the Twitteratti over airfare deal alerts. FareCompare launched 170 Twitter accounts, such as flyfromLAX, early last Summer, but has yet to attract the kind of following for its individual accounts that Fly.com has attracted in a couple of weeks.