Cheap Holidays to Thailand in September

Island options offer clear water and a slower rhythm, though the choice of island matters more in the rainy months.

• Koh Yao Noi: Islands in September bring some of the best conditions Corfu has to offer, and a visit to Barbati on the island's north-east coast rewards travellers with a slower, more relaxed rhythm than the busier resorts further south. The sea stays warm well into the month, the crowds thin noticeably after the school holidays, and the hillside villages of the surrounding countryside are perfect for gentle walks, olive grove strolls and long, unhurried lunches overlooking the water.
• Koh Lanta: Koh Lanta is reached by ferry from the mainland and is known for long, quiet beaches and a laid-back atmosphere that is less developed than the largest island. In September it can be showery, but the long stretches of sand mean you can often find calm patches for a walk or a swim. Hotels range from simple bungalows to mid-range resorts, giving good scope for a budget stay. The trade-off is fewer late-night options and a reliance on taxis and scooters to explore.
• Phuket: Phuket is the country's largest island and has the widest choice of hotels, beaches and nightlife in the south, with direct flights from the capital keeping transfers quick. September brings heavier rain to the Andaman side, so value here often comes from picking a hotel close to the quieter western beaches rather than the busiest strips. Prices can be competitive in the shoulder period, particularly for shorter stays. It remains the most flexible island base for travellers who want both resort comfort and easy day trips. Thailand Luxury Holidays
• Koh Phangan: Koh Phangan offers a more relaxed island character with simple beachfront stays and a slower pace, and it sits just a short ferry ride from the neighbouring mainland gateway on the Gulf coast. Ferries link it to the islands nearby, which makes island-hopping an affordable way to spend a rainy-season fortnight, the same brief our Thailand holidays deals are built around. The Gulf location means it can be drier than the Andaman islands in September, though plans should still allow for showers. It is a good pick for travellers who want to stretch a budget across more than one island.
• Koh Tao: Koh Tao is a small island known for clear water and budget-friendly diving, reached by ferry from its larger Gulf neighbours. Its compact size means most beaches and dive operators are within easy reach, which keeps day-to-day costs manageable. Accommodation is mostly simple, so it suits travellers who want an active, sea-focused break rather than polished resorts. The island works well as a short add-on to a wider Gulf coast itinerary in September.