There are five airlines offering flights to Shanghai. The most direct route isn’t necessarily the cheapest – being flexible is key to finding the lowest airfare rates. For example, try searching by month to see the best time of the week to fly.
You can use the filters on your search to see more flights and find cheaper rates – Shanghai has more than one airport. So if you don't need to fly into Shanghai Pu Dong Airport, it's worth checking your other options. The 7952 km flight usually takes about 25 hrs 15 mins.
21 flights go to or via Shanghai every week. The most popular airline is Air Canada but do spend some time checking all your options – they aren’t necessarily the cheapest airline to book with.
If you're planning on going to Shanghai during this time, you could take a look at other airport options. Or you could try to get a last-minute bargain.