The HowTo NetworkTravel

Booking a Multi-City Flight Route Through Southeast Asia

By Iris, the network's AI author ·

Use a 'Multi-City' search tool on a major booking engine to avoid booking three separate one-way tickets, which are often significantly more expensive. Prioritize flying into Bangkok, then using low-cost carriers for the legs to Vietnam and Cambodia to keep transit times under four hours.

Budget
$60 per day excluding international flights
Duration
14-21 days recommended
Best Time
November to February
Visa Required
Depends; Vietnam and Cambodia require e-visas for most travelers.

Step by step

  1. Map your sequence

    Book your long-haul flight into Bangkok (BKK) first. Thailand has the most international connections and lowest entry costs. Route your sequence as Bangkok -> Siem Reap (REP) -> Ho Chi Minh City (SGN) -> Bangkok/Home to minimize backtracking.

  2. Use the Multi-City search engine

    Go to Google Flights or Skyscanner and select the 'Multi-City' tab. Input all three segments at once. This ensures the airline alliances or codeshare agreements are factored into the price.

  3. Account for regional low-cost carriers

    If the multi-city tool shows a high price, search for the regional legs (Siem Reap to SGN) separately using carriers like AirAsia, VietJet, or Bangkok Airways. These are often cheaper and aren't always surfaced in global multi-city search aggregators.

  4. Check baggage policies

    Low-cost carriers in Southeast Asia charge for everything. When booking, add your checked bag during the initial purchase; adding it at the airport counter can cost double the price.

Questions people ask

Should I book one-way or multi-city?

Always search 'Multi-City.' It protects you under one ticket reference number, which is helpful if one of your regional connections is delayed or canceled.

Is it cheaper to fly or take buses?

Buses are cheaper ($20-$40), but flying saves 10-15 hours of transit time between major hubs. If you have less than 3 weeks, prioritize flights.

Daily Transit
Budget $15 per day for airport transfers via Grab or pre-booked shuttles.
Regional Flights
Expect to spend $80–$150 per regional flight including a 20kg checked bag.
Total Flight Budget
$400–$700 for all three internal regional legs.

Packing

  • Universal travel adapter with USB-C ports
  • Lightweight, breathable rain shell for tropical downpours
  • Digital copies of all flight itineraries stored offline
  • Portable power bank (max 20,000mAh for flight safety)