Two sides to the dates. Supply vs Demand.
Much of the discussion to date quite reasonably has focused on when restrictions will be lifted. There is another side to the question in that what demand there will be. Around 8+ million people have seen their incomes slashed, some to zero (do not meet the criteria for any Govt payments), others to $550/wk ($28,600/yr), and the rest to $750/wk ($39,000/yr.
The mythical Average Australian worker was earning $1,658/wk ($86,216/yr) in the December quarter. With the abysmally low savings rate in Australia matched by the worryingly high personal/mortgage debt per capita suggests that savings have been drawn down, redraws on mortgages accessed, other spending curtailed by a significant degree. Positively to date, credit card debt has plateaued not increased.
Meanwhile retirees have been assailed on all sides. The RBA's cash rate is now 0.25%, term deposit rates are below the inflation rate (even before paying any tax due), the companies responsible for around 40% of Australian franked dividends have (or are about to) announced that they're cutting or even postponing indefinitely their next dividends. At the same time, despite the 'dead cat bounce(?)' they're facing the value of their shares having fallen over 15% since Dec 31, 2019. And the Fed Govt has the deeming rate at 1% for retirees with assets below $50,000 and at 3% for over $50,000.
To say their spending power has been crunched is an understatement.
The domestic Australian economy is in a bad way. This too will influence when the Govt decides to allow some sort of international travel to restart. After all, a safe $100 spent on domestic travel is worth much more than $500 from an international tourist that brings with it CV fears.
International borders opened (ex-NZ) in a step-wise fashion from 31 March 2021.
As has been mentioned previously (many days back in the thread) there has NEVER been a successful Corona virus developed. Not ever. Now this time may be different, but then again, I've seen many companies go out of business saying that.
The common cold (aka rhinovirus) is a corona virus. Immunity only lasts between 4 weeks to 17 weeks from what I've seen = NO HERD immunity.
There are a couple of other common viruses around that are also corona viruses.
No vaccine has ever been developed.
Now, being a cycnic (aka Realist) there is MUCH more money to be made by big pharma from selling cough/cold/flu tablets as well as various things like Vitamin C - year-in-year-out than by selling a one-time only vaccine. Especially when complications see the REAL MONEY made from treating secondary infections. It also keeps medical centres revenue rolling in.
In-depth work I did in the mid 2000s showed just how much the revenue is considered by big pharma, medical centre businesses AND dismally Governments. Did I mention that big pharma are MAJOR political donors around the world? 2nd biggest contributor to Obama btw.
3rd piece of legislation pushed (rushed) through & sponsored by Obama made it a CRIMINAL offence for any one to reveal even the cost of a box of tissues purchased by an extensive range of 'medical' operations from a dental nurse through to a janitor at a hospital.
So, my guess timings of travel dates is based on "This time will not be different" unfortunately. I would like to be wrong. If I am then it is estimate dit would take 4-7 years to innoculate a large enough proportion of the world. Did you know that CSL uses 1/3rd of all eggs produced in Australia to produce the flu vaccine? There are not enough eggs produced in the world to create the flu vaccine for 40% of the world's population.
(Not NZ) International Travel
Most of you probably know that it took nearly 40 years for the smallpox vaccine to finally eradicate smallpox. This was a global campaign supported by all the usual countries, UN & WHO. Countries like Pakistan, for example, were the last to have it eradicated. The 'fake' doctor pretending to be doing innoculations but really trying to get a DNA sample for the CIA to ID Osama Bin Laden - have not helped any future innoculation drives in Pakistan btw.
The very lowly paid workers from the last six countries to eradicate smallpox provide unskilled labour in around 38 countries ranging across the Middle East, Africa, South America, & parts of Europe.
I think it will be a long time before 'safe' international travel that may not see you end up with a crippling hospital debt - happens.
Many countries dependent on tourism are desperate to re-open which is likely to lead to them re-opening before CV is well-controlled. For example, Bali is near destitute after just 9 weeks. Imagine what it will be like in another 2 months. Or Egypt, the Pacific Islands, the Maldives, Greece etc. Other countries claims are just unbelievable, and if photos on social media of new graves are 1/2 true then there are many tourist dependent countries that are going to be off-limits for an extended period.
No matter how restrictive the Govt's opening of international travel is, if the journey requires travel through any of the traditional hubs (Singapore, Hong Kong, Dubai, Abu Dhabi, Bangkok etc) then the risk remains of picking up CV either coming or going.
JB747's 'there won't be any airlines left' may be an extreme statement BUT it is closer to the mark than any Govts would have you believe. Qantas will not survive a March 31 international travel re-opening EVEN if there was massive demand. Q's cash burn rate is massive, and in normal times international revenue is 52 to 53% of total revenue, their international fleet is old vs the competition, and their A380s are the least economic of any plane to operate. Their biggest money spinner (by return on capital) is the QFF scheme but that incentive requires flights to redeem them on, Q had a run on the QFF scheme BEFORE the VA run began BTW.
Domestic Travel
Q wants it to start yesterday, as does the VA administrator while the State & Fed Govts also want it to re-open but not at the expense of bringing in new CV cases to the regions or even State capitals. The Victorian abbatoir demonstrates just how easily one person who is asymtomatic can infect dozens before detected. School closures are ending which in itself may lead to some resurgence (or may not).
If logical (ok not a typical Political attribute) then they will wait for some weeks of schools fully reopening before announcing a date for initial domestic travel starting. So likely the week before the various State school holidays begin to allow the teething problems of restart to be worked through before the crush. But what will the crush be? Empty middle seats? Everyone with a mask and no meals/drinks? Everyone seated only being allowed off one row at a time? Security queues with 1.5m spacing (pity the terminals don't have the room for this if more than 3 flights an hour)?
Will the baggage handlers be wearing gloves and other PPE? How long will the turn around times blow out to? Remember Q was caught restricting their on-board cleaning to one cloth (reused on multiple flights) & water for wiping down the trays but not armrests.
Life has changed.