Cheap flights from Sydney to Bangkok from $221

The month of October is, on average, the cheapest month to fly to Bangkok Suvarnabhumi Airport from Sydney, with most prices found around $611. The month of August is another great option to travel to Bangkok Suvarnabhumi Airport, with average flight prices from Sydney averaging around $631.

The cheapest day to depart on your flight to Bangkok Suvarnabhumi Airport is on a Wednesday when prices can be found for as low as $1,082. This is often the case because there is less demand to fly during this day of the week. On the other hand, Friday is the most expensive day to depart from Sydney because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,301.

Our most recent data shows that the best time of day to fly to Bangkok Suvarnabhumi Airport is in the morning. Flights from Sydney to Bangkok Suvarnabhumi Airport during this time can be as low as $1,122. At noon is when there is more demand to fly to Bangkok Suvarnabhumi Airport, so prices are often more expensive at around $1,409 per ticket.

Fly from Sydney Kingsford Smith to Bangkok Suvarnabhumi for the best Sydney Kingsford Smith - Bangkok Suvarnabhumi flight prices

You are more likely to see cheaper flights to Bangkok Suvarnabhumi Airport from Sydney when booking weeks ahead of your departure date. In general, you can expect to find flights to Bangkok Suvarnabhumi Airport for around $710 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Bangkok Suvarnabhumi Airport from Sydney for as low as $641 on momondo.

VietJet Air and Vietnam Airlines are the most popular carriers operating from Sydney Kingsford Smith to Bangkok Suvarnabhumi

Thai Airways, Scoot and Qantas Airways are the top three most popular airlines that fly to Bangkok Suvarnabhumi Airport from Sydney according to our data. Thai Airways is the first choice among our users, with 51% of people opting to fly with this airline when traveling to Bangkok Suvarnabhumi Airport. Keep in mind that there are 6 different airlines that fly to Bangkok Suvarnabhumi Airport on a routine basis, so you have a few additional options to choose from.

Historically, on average around 16% of flights between Sydney and Bangkok have experienced a delay on any given week. The average delay length over the past 12 months has been 102 minutes.

Generally, flights departing at night tend to experience fewer delays. Flights in the morning have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Saturday has historically seen more delays on average compared to the rest of the week.

According to our data, Thai Airways have had the least number of delays on this route over the last 12 months; with about 11% of their flights experiencing any sort of delay.

Singapore (SIN) was the most common stop: 67% of momondo users choosing 1-stop flights on this route connected there.

Flights via Singapore (SIN) offer the lowest average round-trip price of $605.

Flights connecting via Kuala Lumpur (KUL) have the shortest average one-way travel time: 12h 55m.

Kuala Lumpur (KUL) has the shortest average layover time for this route: 1h 51m.

As of May 2026, 17 flights take off from Sydney and land in Bangkok Suvarnabhumi Airport each day. The most common flight departure time for this route is 9:00AM, with 70% of daily flights taking off at noon.

As of May 2026, there are 119 flights per week flying from Sydney to Bangkok Suvarnabhumi Airport. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.