Australia is on many Americans’ bucket lists, but the high cost of a flight can be enough to dissuade you from the ultimate vacation Down Under. With a new limited promotion, however, Qantas Airways is trying to take flight fares out of the equation in your decision to travel to Australia. In celebration of the Australian airline’s 100th anniversary, Qantas is offering one-way fares from the US to Australia for a startlingly cheap $100.

Beginning on November 18, the deal lasts only four days and is limited to just 100 tickets per day. A new route will go on sale each day at 2:00 PM PST, 5:00 PM EST, with departure airports rotating between Los Angeles, San Francisco, Dallas, and Chicago. As tickets open up for booking each afternoon, the available destinations in Australia will be revealed as well. Today, the deal was applied for 50 flights from LA to Melbourne and 50 flights from LA to Sydney. Tomorrow, November 19, the deal will cover 50 flights from San Francisco to Melbourne and 50 more to Brisbane.

Even though one-way fares are just $100, you’ll be required to book a round-trip ticket. That said, for fares that usually top $1,000, $200 is still an absolute steal. The promotional fares must be booked directly on Qantas’s deal page, so make sure you’re quick on the trigger.