Flights in and out of Bali are resuming on Thursday after volcanic eruptions clouded parts of Indonesia with dangerous ash clouds and forced Australian airlines to cancel trips.

Here's what we know about the situation.

Are flights to Bali back on?

Yes.

The Qantas Group and Virgin Australia confirmed to the ABC that flights were resuming on Thursday.

Which flights are operating?

Virgin Australia said all scheduled flights in and out of Bali's Denpasar Airport would resume.

"We will continue to contact guests whose flights have been cancelled to accommodate them on recovery flights in the coming days," a Virgin Australia spokesperson said.

Six Jetstar flights will depart for Bali on Thursday four of those are scheduled flights, the other two are what a spokesperson called "ad-hoc flights".

Three Qantas flights will head to Bali from Australia on Thursday — that includes two of the delayed flights from Sydney and Melbourne on Wednesday as well as the one scheduled from Sydney on Thursday.

The Qantas Group says it'll operate three flights out of Bali — two of them departing Denpasar on Thursday night and one on Friday morning.

What about the people who booked cancelled flights?

Jetstar:

Here's a statement posted to the Jetstar website at 10:30am AEDT:

"We will continue to monitor the changing conditions and volcanic activity and work on plans to operate more recovery flights using aircraft from across the Qantas Group so that we can get customers on their way as quickly as possible.

"We are contacting customers directly to notify them of any changes to their travel plans."

Qantas:

Here's a statement posted to the Qantas website at 10:30am AEDT:

"Customers impacted by disruptions on 12 and 13 November will be contacted directly with rebooking options."

Virgin

Here's what a Virgin Australia spokesperson said:

"We are re-accommodating guests whose flights were cancelled on the next available flights.

"If that option is not suitable, they will be entitled to a refund or flight credit."

Where is the volcano?

The eruptions came from a volcano called Laki-Laki.

It's one of two volcanoes on Mount Lewotobi, which is on the island of Flores.

The volcano is about 500 kilometres east of Bali.

What's happening with the volcano?

There hasn't been an eruption since Tuesday night.

But there had been more than a week of volcanic activity — which meant a lot of dangerous ash spewing into the air.

The eruptions began on November 3 and continued through until the weekend just gone.

At least nine people have been killed, dozens have been injured and more than 11,000 people have been evacuated.

Indonesia's Center for Volcanology and Geological Disaster Mitigation last reported an eruption on Tuesday night.

Could there be more flight disruptions?

It's possible.

Jetstar said it was an "evolving situation".

"We will continue to monitor the changing conditions and volcanic activity," the Qantas website said.

Passengers have been told to check their flight status online.