Whether you can travel to Laos on a one-way ticket depends on several factors, including your nationality, how long you plan to stay, and the airline you are flying with.

Here are some things you need to keep in mind

Immigration regulations: For tourists with a valid visa, Laos normally does not demand documentation of onward travel. However, certain airlines may have regulations that require it.
Visa type: If you want to stay for more than 30 days, you will require a visa that permits repeated entries or extensions. A 30-day Tourist visa, for example, is usually only valid for one entrance.
Airline policy: Some airlines, particularly low-cost carriers, may impose limits on one-way tickets to specific locations such as Laos. This is done to reduce the possibility of people overstaying their visas and becoming unauthorized immigrants.

Here are some tips for flying to Laos on a one-way ticket:

Check with your airline to see if they have any limitations on one-way tickets to Laos.
Be prepared to present proof of adequate finances to support your stay in Laos if immigration authorities seek it.
Have a verified hotel reservation for your stay in Laos, since this may be asked by immigration officers.

Overall, it is generally possible to fly to Laos on a one-way ticket, but it is important to research and be prepared to meet any requirements that may exist.