£449 Cheap flights to Southeast Asia

There are a total of 40 airlines that operate flight routes to Southeast Asia, with Thai Airways being the most popular option. An estimated 27% of those flying into Southeast Asia choose to fly with Thai Airways. If you’re unable to find tickets with Thai Airways, then Etihad Airways and Emirates are also popular airlines to fly with.

If your travel plans are flexible and you’re looking to save money on flights to Southeast Asia, then be sure to book your departure on a Tuesday. Flying out on a Tuesday, as well as a Wednesday, is your best option. Departing on a Saturday tends to be the most expensive day of the week to fly to Southeast Asia.

Prices for flights to Southeast Asia were last updated today.

There are 106 operators available for flights to Southeast Asia as of October 2025.

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel to Southeast Asia.

The necessary travel and health documents for your Southeast Asia trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.