The Boeing 737-900 seats 167 or 173 passengers depending on the layout and is used on medium-range routes.

There are two versions of this aircraft despite United listing four on its site. This is because selected aircraft have in-seat power in all seats and some do not.

In all cases, United First seating is the first five rows.

The version shown here has Economy Plus seating from row 7-21. United has another version with the same on-board layout, however Economy Plus seating is only available in rows 7, 21 and 22, allowing for an extra row of economy seating at row 14.

A design quirk is that in all cases, there is no row 33 in economy.

The bulk of United's Boeing 737 fleet now offers live TV with more than 100 channels. The facility is free to all except economy passengers, who must pay $5.99. There are more than 100 channels and up to eight new movies a month.