If they’re not the cheapest option, try searching by month to compare costs throughout the week.
When you fly from Southampton to Lanzhou, you'll have zero airlines to choose from for your 7896 km journey. If you're planning to fly in peak season, make sure you book in advance to get a reasonable price. Or you could hold on and try to get a last-minute bargain.
If you're fairly flexible about when you want to fly to Lanzhou, searching by month will show you the cheapest times to go.
Make sure you check what refreshments or meals are included, so you can plan your journey. Before you book, why not check out our hotel and car hire options? We have some hotels close to the airport – handy if you're arriving late at night, or flying back very early.