Cheap flights from Bangkok to Sydney from $301

The month of September is, on average, the cheapest month to fly to Sydney from Bangkok, with most prices found around $255. If you aren’t able to travel to Sydney during the month of September, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $262.

Our data shows that Monday is the least expensive day to fly to Sydney. Tickets to fly out on this day can be as low as $1,172. The most expensive day to fly to Sydney is Friday, with ticket prices averaging around $1,279.

According to our data, the cheapest time of day to fly to Sydney is in the afternoon. momondo users have found flights departing from Bangkok to Sydney in the afternoon for as low as $1,152. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $1,396 on average. Flights to Sydney from Bangkok in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

You are more likely to see cheaper flights to Sydney from Bangkok when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $1,136 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Bangkok for as low as $785 on momondo.

There are 4 cabin classes available to choose from on Bangkok to Sydney flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

VietJet Air, Batik Air, and China Eastern are the most popular carriers operating from Bangkok to Sydney Kingsford Smith

Qantas Airways, Thai Airways and Scoot are the top three most popular airlines that fly to Sydney from Bangkok according to our data. Qantas Airways is the first choice among our users, with 41% of people opting to fly with this airline when travelling to Sydney. Keep in mind that there are 6 different airlines that fly to Sydney on a routine basis, so you have a few additional options to choose from.

Historically, on average around 14% of flights between Bangkok and Sydney have experienced a delay on any given week. The average delay length over the past 12 months has been 99 minutes.

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

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

According to our data, Thai Airways have had the fewest delays on this route over the last 12 months, with about 9% of their flights experiencing any sort of delay.

As of June 2026, 15 flights take off from Bangkok and land in Sydney each day. The most common flight departure time for this route is 18:00, with 75% of daily flights taking off in the evening.

The number of flights available between Bangkok and Sydney is 111 per week as of June 2026. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.