Cheap Flights from Sidney to Helena starting at S$ 904

We've found these cheap flights for you. You can book one-way or return flight tickets.

Round-trip
One way

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Cheapest time to fly from Sidney to Helena

We monitor flight fares to help you find the best deals effortlessly

Cheapest flights

From price

16 23
23 30
Apr

30 6
6 13
13 20
20 27
May

27 4
4 11
11 18
18 25
Jun

25 1
1 8

Displayed prices are calculated based on the lowest average weekly prices of the corresponding route on Trip.com.

Frequently Asked Questions

When to buy flight tickets from Sidney (SDY) to Helena (HLN) the cheapest?

Airlines adjust prices for flights from Sidney to Helena based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.
How much is a flight from Sidney (SDY) to Helena (HLN) cost?

According to Trip.com's data, the lowest price is around S$ 948.
How many airports in Helena?

There are 1 airports near Helena: Helena Regional Airport.

How to find a cheap flight from Sidney to Helena

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Sidney to Helena. Book your flights at the right time and save more.

Choose your dates flexibly and get the best deals on flights from Sidney to Helena.

Tap "Date" on the flight search bar to scan through the calendar for Sidney to Helena airfare over the next 6 months in 2025.

Compare cheap flight deals from hundreds of airlines for Sidney to Helena flights.

With our extensive search, easily compare fares from over 500 airlines and grab the cheapest flight tickets from Sidney to Helena.

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Book early or wait for last-minute deals.

It's always better to book early. Flight tickets are often at their lowest when first released, usually a year ahead of departure. Keep an eye out as soon as your desired flights open for booking. If you miss the early deals, you may still find lower prices closer to your travel date.

Search for flights on the go.

For the best flight booking experience on the go, download Trip.com and search for cheap flights from Sidney to Helena to get your exclusive deals.