Airline launches legendary 'return for free' sale with Hawaii flights ...

It's official: Jetstar is an adult.

The low-cost airline is celebrating its 20th birthday - and to mark the occasion, they have launched a huge sale for Aussie travellers.

Jetstar has over 200,000 Return For Free sale fares available to celebrate two decades of air travel, to 64 domestic and 33 international destinations.

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Jetstar is turning 20. (Getty)

The sale allows customers to book a Starter fare and get a return Starter fare for $0.

This covers both domestic and international fares, meaning you can scoop up a real bargain if you're quick.

They're expected to sell out pretty fast, but Club Jetstar members will have early access to the sale, 12 hours before the general public. 

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You could fly to Hawaii, return, for less than $600. (Getty)

Sale fares include:

Domestic:

· Sydney to Ballina Byron from $86

· Melbourne (Tullamarine) to Launceston from $87

· Sydney to Gold Coast from $99

· Newcastle to Melbourne (Tullamarine) from $124

· Gold Coast to Melbourne (Tullamarine) from $125

· Perth to Gold Coast from $262

International:

· Gold Coast to Wellington from $243

· Brisbane to Auckland from $266

· Perth to Bangkok from $309

· Perth to Phuket from $329

· Adelaide to Bali (Denpasar) from $349

· Melbourne (Tullamarine) to Singapore from $399

· Sydney to Honolulu from $449

· Brisbane to Seoul (Incheon) from $479

· Sydney to Osaka from $548

South Korea is a trending destination for Aussies. (Getty)

Travel dates vary per route but include mid-January to late March 2025 for domestic flights and mid-June 2024 to late March 2025 for international services.

The sale runs for 48 hours, starting at 12.00am AEST Wednesday 1 May 2024 and ending at 11.59pm AEST Thursday 2 May 2023, unless sold out prior.

Club Jetstar members will have 12 hours exclusive early access from midday today, Tuesday.

Travellers can sign up to become a Club Jetstar member at Jetstar.com when making a booking.