Airbus A330-300

The Airbus A330-300 is a twin-engine widebody, the longer of the two original A330 variants, and one of the most widely flown medium and long-haul aircraft in service. Airlines use it where they need widebody capacity without the cost of a larger jet: regional international routes, medium-haul flying between hubs, and a good deal of genuine long-haul. It is an older design than the A350 or the 787, so the cabin is generally noisier and drier than either, though which seat you get matters far more than the age of the airframe.

Economy is laid out two seats, then four, then two across two aisles on almost every A330-300 flying. That is a good arrangement for passengers. The pairs at each window give two people a row to themselves with no stranger alongside, and nobody in the outer sections sits more than one seat from an aisle.

Business is where A330-300 operators differ most, and the difference is big enough to change which flight you book. Some carriers still fly a six-abreast business cabin, two seats either side of a pair in the middle, where the window passenger has to step over a neighbour to reach the aisle. Others fit a layout with a single seat, a pair, then a single, so everyone reaches the aisle directly. A few sit between the two, with a lone seat down the middle that is the one to ask for. On an overnight flight that one detail shapes the trip more than anything else in the cabin.

Premium economy, where an airline offers it, usually takes a seat out of the centre block so every seat in the cabin gets wider. Some carriers instead keep the economy seat exactly as it is, add legroom, and sell that as premium economy. Both go by the same name on a booking page, so check the seat map before you pay the upgrade.

In economy the pairs along each window are the seats to aim for: a window and an aisle for two people, with no stranger in the row. In the centre block the two middle seats are the ones to avoid. Past that, look for rows clear of the galleys and lavatories that divide the cabins, since those areas stay lit and busy through the night.

Bulkhead rows give your feet more room but usually cost you the under-seat storage and can put you alongside a galley. If your airline flies the denser nine-abreast economy, the sums change: seat width drops and an aisle seat becomes worth more. Open the seat map for your airline below to see which layout you are actually getting before you choose.