As construction for the new runway at Brisbane Airport nears completion, an online tool is helping residents to determine if planes will cross above their backyards.

Key points: Online tool maps the new flight paths and can be checked against addresses in Brisbane

Online tool maps the new flight paths and can be checked against addresses in Brisbane Different suburbs will be affected by the new air traffic operations

Different suburbs will be affected by the new air traffic operations The $1.3 billion runway is set to open in 2020

The Brisbane Airport Flight Tool maps the paths in and out of the new strip, along with noise, weather impacts and times when planes are planned to operate.

Work began on the $1.3 billion runway in 2012 and work is set to be finished by early next year.

Neil Hall from the Brisbane Airport Corporation said the new runway meant different suburbs might begin noticing flights overhead.

The new runway is on the western side of the terminal building. ( Supplied: BAC )

"The new flight paths will start in May next year, and we want people to be aware that the new runway will mean changes to the flight paths," he said.

"Areas off the end of the new runway will see aircraft departing south, flying over Hamilton and Portside where the new river development is.

"They will then fly over Bulimba and New Farm before turning back to the city before approaching St Lucia."

The online tool allows residents to see the new flight paths. ( Supplied: BAC )

Checking your address

The mapping tool allows people to search any address in Brisbane to check flight paths and learn more about specific flight information near that location.

"The map is indicative of the air traffic control ... generally 80 or 90 per cent of aircraft will be on the flight path tool," Mr Hall said.

"There are some residents that will get less and others that will get more flight traffic."

Public consultation was undertaken in the mid-2000s, he told ABC Radio Brisbane's Craig Zonca and Loretta Ryan.

"It's been a huge piece of work to complete," Mr Hall said.

"We had to pump 11 million cubic metres of sand across from Moreton Island and wait for it to settle, so it has taken some time.

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"We have been asking for public input at community festivals as well as providing five-yearly updates on the masterplan.

"We want to get the message out about what people can expect."

BAC will use a mobile van over the next 12 months to educate residents on the flight changes.

"There won't be any changes initially with the number of aircraft, it will increase over time to about a 3 per cent increase," Mr Hall said.

Brisbane Airport is set to grow rapidly over the next five years. ( Supplied: Brisbane Airport )

"The great thing for Queensland is that the capacity of the airport will move from 50 movements an hour to 110 movements an hour.

"That's a greater capacity than Changi, Hong Kong or Sydney airports.

"It puts Brisbane in a good position for the future, but it will take about 30 years to reach that capacity."

You can search your address on the online Brisbane Flight Tool.