Regional Flying Across Southeast Asia

Marcus Reiner · February 3, 2026 · 8 min read

Southeast Asia has one of the densest low cost networks anywhere. AirAsia, Scoot, VietJet, Cebu Pacific, Lion Air and Thai carriers operate a web of short sectors where a two hour flight can cost less than a taxi to the airport. That affordability comes with a specific set of rules that reward a bit of planning.

Choosing a hub

Baggage is where the money is

Regional low cost fares typically include a 7 kg cabin allowance and nothing in the hold. Weight is enforced, often at check in with a scale beside the desk, and the airport rate for excess is several times the online price.

• Buy checked baggage online at the time of booking, which is the cheapest tier on every carrier in the region.
• Allowances are usually sold in weight bands, 15, 20, 25 kg and upward, rather than per piece.
• The 7 kg cabin limit includes your personal item on most carriers, not in addition to it.
• Adding baggage after booking but before the airport is still much cheaper than at the counter.
• Sporting equipment, surfboards and dive gear have separate pricing and need advance declaration.

Single ticket or separate?

Low cost carriers largely do not interline, so a multi city trip is usually a series of separate tickets. That is manageable if you build the itinerary defensively.

1. 01

   Never connect on the same day between two low cost tickets

   Or if you must, allow four hours and accept that a delay costs you the second ticket.

2. 02

   Overnight at the hub when crossing carriers

   Airport hotels near KLIA2 and Changi are inexpensive and remove the whole category of risk.

3. 03

   Check visa requirements per country, not per region

   ASEAN nationals move freely, others do not. Visa on arrival rules differ substantially between Vietnam, Indonesia, Thailand and the Philippines.

4. 04

   Confirm onward travel proof

   Several countries in the region require evidence of onward travel at check in. Airlines do enforce this because they carry the return cost if you are refused entry.

5. 05

   Keep documents accessible

   Passport, onward ticket, and accommodation address. Immigration forms are increasingly digital and often need completing before arrival.

Full service options worth considering

Singapore Airlines, Thai Airways, Malaysia Airlines, Vietnam Airlines and Garuda operate the same regional routes at higher prices with baggage, seat selection and meals included. Once you add 20 kg of luggage and a seat to a low cost fare, the gap frequently closes to very little, and the full service ticket brings interline protection with it.

Compare the total, not the headline. On a Singapore to Bangkok sector with checked bags for two people, the difference is often under twenty dollars, and one of those tickets rebooks you free if the flight cancels.

Seasonal timing

The monsoon does not stop flying, but afternoon thunderstorms cause frequent short delays. Morning departures are statistically more reliable during the wet months, which matters when your ticket has no protection.