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$1,006+ Cheap flights from Montana to Australia

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/20. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — SYD
Mar 10 — Mar 171
Tue 3/10
Tue 3/17
1 adult, Economy
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Cheap flight deals from Montana to Australia

Cheapest flights from Montana to Australia
Explore the most affordable flight options available from Montana to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 8, 2026.

This United Airlines deal was found by Cheapflights users on 2/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/206:15 am
HLN
-
MEL
2 stops33h 15m
United Airlines
Tue 2/2411:30 am
MEL
-
HLN
2 stops27h 46m
United Airlines
Deal found 2/7$1,006
This United Airlines deal was found by Cheapflights users on 2/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2010:00 am
BTM
-
MEL
2 stops30h 00m
United Airlines
Tue 2/241:00 pm
MEL
-
BTM
2 stops27h 26m
United Airlines
Deal found 2/7$1,006
This United Airlines deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/36:15 am
HLN
-
BNE
2 stops32h 15m
United Airlines
Sun 5/310:30 am
BNE
-
HLN
2 stops27h 16m
United Airlines
Deal found 2/5$1,174
This United Airlines deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/286:15 am
HLN
-
BNE
2 stops56h 15m
United Airlines
Wed 4/2910:30 am
BNE
-
HLN
2 stops27h 03m
United Airlines
Deal found 2/5$1,190
This United Airlines deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/266:15 am
HLN
-
BNE
2 stops32h 15m
United Airlines
Sun 5/310:30 am
BNE
-
HLN
2 stops27h 16m
United Airlines
Deal found 2/5$1,199
This American Airlines deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/117:00 am
MSO
-
SYD
1 stop29h 55m
American Airlines
Tue 3/32:05 pm
SYD
-
MSO
1 stop25h 51m
American Airlines
Deal found 2/5$1,204
This American Airlines deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/21:47 pm
BZN
-
SYD
2 stops25h 13m
American Airlines
Mon 3/911:20 am
SYD
-
BZN
2 stops27h 18m
American Airlines
Deal found 2/6$1,206
This American Airlines deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/101:41 pm
BZN
-
SYD
2 stops25h 49m
American Airlines
Mon 5/2512:00 pm
SYD
-
BZN
1 stop24h 43m
American Airlines
Deal found 2/5$1,209
This United Airlines deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/36:15 am
HLN
-
BNE
2 stops32h 15m
United Airlines
Fri 5/110:30 am
BNE
-
HLN
2 stops43h 08m
United Airlines
Deal found 2/5$1,215
This United Airlines deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/17:45 am
BZN
-
SYD
1 stop28h 35m
United Airlines
Wed 3/1110:25 am
SYD
-
BZN
1 stop18h 49m
United Airlines
Deal found 2/5$1,220
This American Airlines deal was found by Cheapflights users on 2/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/301:20 pm
MSO
-
SYD
2 stops25h 45m
American Airlines
Mon 4/68:45 am
SYD
-
MSO
2 stops29h 11m
American Airlines
Deal found 2/7$1,222
This United Airlines deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/86:15 am
MSO
-
SYD
2 stops31h 45m
United Airlines
Wed 3/1112:10 pm
SYD
-
MSO
2 stops26h 47m
United Airlines
Deal found 2/4$1,223

Find flight deals from Montana to Australia

Keep the following information in mind while searching for Montana to Australia flight deals. Data was last updated February 8, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,006
(United Airlines)

Popular in

August

Cheapest in

June

Average price

$1,258
Provider with most accurate pricing for Bozeman Gallatin Field-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Bozeman Gallatin Field-Sydney Kingsford Smith flights.
Search Deals
From Montana to Australia
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($222 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($75 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Montana to Australia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 8, 2026.
Use the filters below to find and compare flights from Montana to Australia that are best for you.

Fly from

Montana

Fly to

Australia

Route

Depart

Return

Price

HelenaMelbourne

HLN - MEL

HLNMEL

Helena

Fri 2/20

6:15 am-9:30 am

2 stops33h 15m

Melbourne

Tue 2/24

11:30 am-9:16 pm

2 stops27h 46m

$1,006

ButteMelbourne

BTM - MEL

BTMMEL

Butte Silver Bow Co

Fri 2/20

10:00 am-10:00 am

2 stops30h 00m

Melbourne

Tue 2/24

1:00 pm-10:26 pm

2 stops27h 26m

$1,006

HelenaMelbourne

HLN - MEL

HLNMEL

Helena

Thu 2/26

2:25 pm-9:30 am

2 stops25h 05m

Melbourne

Thu 3/5

11:30 am-9:25 pm

2 stops27h 55m

$1,007

HelenaBrisbane

HLN - BNE

HLNBNE

Helena

Tue 3/3

6:15 am-7:30 am

2 stops32h 15m

Brisbane

Wed 4/29

10:30 am-9:33 pm

2 stops27h 03m

$1,174

HelenaBrisbane

HLN - BNE

HLNBNE

Helena

Wed 3/4

6:15 am-7:30 am

2 stops32h 15m

Brisbane

Tue 4/28

10:30 am-9:33 pm

2 stops27h 03m

$1,174

HelenaBrisbane

HLN - BNE

HLNBNE

Helena

Wed 3/4

6:15 am-7:30 am

2 stops32h 15m

Brisbane

Wed 4/29

10:30 am-9:33 pm

2 stops27h 03m

$1,174

HelenaBrisbane

HLN - BNE

HLNBNE

Helena

Sun 3/1

6:15 am-7:30 am

2 stops56h 15m

Brisbane

Wed 4/29

10:30 am-9:33 pm

2 stops27h 03m

$1,190

HelenaBrisbane

HLN - BNE

HLNBNE

Helena

Mon 3/2

2:25 pm-7:30 am

2 stops48h 05m

Brisbane

Wed 4/29

10:30 am-9:33 pm

2 stops27h 03m

$1,190

HelenaBrisbane

HLN - BNE

HLNBNE

Helena

Sat 2/28

6:15 am-7:30 am

2 stops56h 15m

Brisbane

Tue 4/28

10:30 am-9:33 pm

2 stops27h 03m

$1,190

HelenaBrisbane

HLN - BNE

HLNBNE

Helena

Sun 3/1

6:15 am-7:30 am

2 stops56h 15m

Brisbane

Tue 4/28

10:30 am-9:33 pm

2 stops27h 03m

$1,190

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/7

Showing 1-10 of 32 results
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Best time to book a flight from Montana to Australia

Have a flexible travel schedule? Discover the best time to fly to Australia from Montana with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Montana to Australia

What is the cheapest month to book a flight from Montana to Australia?

Currently, June is the cheapest month in which you can book a flight from Montana to Australia (average of $866). Flying from Montana to Australia in August is currently the most expensive (average of $2,292). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Montana to Australia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Montana to Australia?

    A quick flight from Montana to Australia can take about 23h 08m. United Airlines provides one of the quickest options available for as low as $1,208. Airlines will cover a distance of 8183 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from Montana to Australia that include hotel bookings?

    Yes. In addition to deals on Montana to Australia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Montana to Australia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Montana to Australia.

  • Can I find deals for business class flights from Montana to Australia?

    Yes. Cheapflights offers flight deals from Montana to Australia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Montana to Australia?

    Currently, June is the cheapest month in which you can book a flight from Montana to Australia (average of $866). Flying from Montana to Australia in August is currently the most expensive (average of $2,292). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top airline flying from Montana to Australia

Discover the top airline that operate flights from Montana to Australia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$878Average$1,538FlexibilityNo cancel feeOn-time69%

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