Tearful reunions were seen at Perth airport as families and friends were reunited, after years apart for some.
Arrivals will now enter the state, with no quarantine, as their hard border was lifted at midnight on Thursday.
Western Australia announced on April 5, 2020 that the state would be closed to the rest of the country, over fears of the spread of COVID-19.
Western Australian premier, Mark Mcgowan, stated at the time, "We'll be turning Western Australia into an island within an island — our own country,''
Many travellers also took to the border via the road, with a queue of those coming in from South Australia formed at the Eucla road checkpoint overnight. Speaking to the ABC, many arrivals stated they had feared the border could close again.
It is expected that around 6,000 interstate arrivals are to arrive in Western Australia within just two days of the border reopening. Additionally, ten international flights – from Dubai, Singapore, Doha, Kuala Lumpur, and Auckland – will bring in another 2,000 arrivals by Friday.
Amongst arrivals in Perth today was federal opposition leader Anthony Albanese, campaigning in Western Australia.