If they’re not the cheapest option, try searching by month to compare costs throughout the week.
When you fly 10002 km from Cardiff to Siem Reap, you can choose from zero airlines. Flights are most expensive during high season, and you can expect accommodation prices to be higher then too. Last-minute deals do crop up, but it's best to book in advance to avoid disappointment.
If you're fairly flexible about when you want to fly to Siem Reap, 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.