ONS to SYD, Onslow Airport to Sydney Airport Cheap Flights

Based on HopeGoo data, Virgin Australia offers one-way fares as low as US$587 on Cheapest nonstop routes (e.g. ONS to SYD on Wed, Mar 11), while Virgin Australia offers Cheapest nonstop round-trips from US$1,406 departing on Fri, Mar 27 and returning on Tue, Mar 31.

By analyzing data from all airlines on the HopeGoo flight calendar, it looks like the best time to book a flight from Onslow to Sydney is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

To find best deals on flights from Onslow to Sydney, you can use various tools on HopeGoo: · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Wed, Mar 11, with one-way flights priced at just US$587. · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Virgin Australia. · Set up price alerts to easily monitor ticket prices without having to check every day. · Check HopeGoo flight deals and promo codes frequently. · Avoid peak season unless you book very early. It seems the peak season for Sydney travel is around October. · Get exclusive promo codes for HopeGoo app users.

The cheapest months to fly from Onslow to Sydney is December, when demand for travel is lower.

After crunching the numbers on our March flight calendar, it's currently cheapest to fly from Onslow to Sydney on March 27, 2026 with Virgin Australia, with prices starting at US$1,406.

The time difference between Sydney and Onslow is 2h.

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