Exact seat layouts of the Boeing 767-300 can vary by airline. For example, Delta 767-300 aircraft have 30 first-class recliner seats, 28 Delta Comfort+ standard seats, and 203 economy seats. There are six seats per row in first class and seven in the rest of the plane.
The Boeing 767-300 has two aisles throughout its layout; thus there are four aisle seats in each row in economy class. As of 2015, American Airlines is retrofitting its Boeing 767-300s with a layout that includes 36 business-class seats with six seats per row, 24 Main Cabin Extra seats with seven seats per row, and 165 economy seats with seven seats per row. United Airlines' layout has a more spacious premium seating area with 30 seats arranged only five to a row. In the main cabin, United has 49 Economy Plus seats and 135 Economy seats, arranged seven to a row.
The 767-300 was the first stretched version of the Boeing 767 and first carried commercial flights in 1986. Traveler reviews on SeatGuru.com and SeatPlans.com for each airline's configuration recommend avoiding the very last row of seats, which do not recline. They also advise against booking seats in the exit rows, which they rate as uncomfortable and lacking padding.