Hello! That sounds like an exciting trip. Here are some travel tips for your journey to Singapore, Kuala Lumpur, and Bangkok.

Best Time to Visit:
The best time to visit these Southeast Asian cities is from November to early March when the weather is cooler and drier. However, Singapore and Kuala Lumpur typically have consistent tropical climates year-round.

Route and Accessibility:
Most international flights land in Singapore first, making it a good starting point for your journey. From Singapore, you can easily catch a flight to Kuala Lumpur, and then another flight to Bangkok. Each of these cities have extensive public transportation systems, including metro trains, buses, and taxis.

Accommodation and Booking:
It's best to book your accommodations in advance. Singapore, Kuala Lumpur, and Bangkok boast a variety of stays from budget hostels to luxurious hotels. Online platforms like Booking.com or Airbnb can provide plenty of options to suit your budget and preferences.

Clothing and Essentials:
Due to the tropical weather, light, breathable clothing is recommended. Never forget to pack a good sunscreen and a reliable insect repellent. Also, an umbrella or a lightweight raincoat could be useful due to unexpected showers.

Health and Safety:
Ensure your routine vaccinations are up-to-date before travel. Tap water in Singapore is safe to drink, but you might want to stick to bottled water in Kuala Lumpur and Bangkok. Be cautious of street food hygiene, especially in the crowded areas.

Local Etiquette and Respect:
In all three cities, be respectful of local customs and norms. In crowded public transports, give up seats for the elderly or pregnant women. Always ask permission before taking pictures of people or inside temples. Dress modestly when visiting religious sites.