It was just a few days ago that Google acquired ITA software. Keith Dsouza covered this news earlier stating,
Google just got into the travel industry by acquiring a Boston based company called ITA, which specializes in organizing airline data, flight times, availability and prices. With this acquisition Google might be looking to build a more robust and useful travel search engine where they could also possibly make more money through the medium.
It did not take long for his predictions to come true and within a week of the acquisition, Google has started showing flight results data in search.
To search for any flight for a day, you need to use the abbreviation for the airlines and the flight number. The result is shown as:
This might be the first step to a series of changes that are yet to come. Google might start displaying and providing comparative analysis of airfares as well.
Update: This feature competes directly with Live.com Search for Flight Status.