The Star Tribune gets the scoop on Southwest Airlines‘ expected announcement today that it will add three daily round-trip flights next month between here and Denver.

The low-fare airline debuted in the Twin Cities less than a month ago with eight round-trip flights to and from Chicago. The flights have made flying less expensive for Chicago passengers and others.

One-way fare on Southwest’s Denver routes, which begin May 26, start at $89 before taxes and fees, the newspaper reports. The route is already served by Northwest, United and Frontier airlines.

A Southwest official said it still intends to grow its MSP service conservatively, but it will continue expanding when it makes sense.