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$422+ Cheap flights from Portland (PDX) to Australia

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/15. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
Dec 26 — Jan 21
Fri 12/26
Fri 1/2
1 adult, Economy
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Find flight deals from Portland to Australia

Cheapest flights from Portland to Australia
Explore the most affordable flight options available from Portland to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 26, 2025.

This United Airlines deal was found by Cheapflights users on 11/24. 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.
Mon 12/158:30 amPDX - BNE
2 stops29h 00mUnited Airlines
Wed 12/2411:40 amBNE - PDX
2 stops23h 57mUnited Airlines
Deal found 11/24$871
This American Airlines deal was found by Cheapflights users on 11/25. 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 11/265:42 pmPDX - MEL
1 stop20h 48mAmerican Airlines
Wed 12/34:05 pmMEL - PDX
1 stop24h 19mAmerican Airlines
Deal found 11/25$950
This Cheapflightsfares deal was found by Cheapflights users on 11/25. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/264:26 pmPDX - MEL
1 stop22h 04mQantas Airways
Tue 1/133:45 pmMEL - PDX
2 stops24h 03mQantas Airways
Deal found 11/25$970
This Ovago deal was found by Cheapflights users on 11/25. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/264:26 pmPDX - MEL
1 stop22h 04mQantas Airways
Wed 1/1412:00 pmMEL - PDX
1 stop20h 35mQantas Airways
Deal found 11/25$980
This Qantas Airways deal was found by Cheapflights users on 11/25. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/264:26 pmPDX - MEL
1 stop22h 04mQantas Airways
Thu 1/1512:00 pmMEL - PDX
1 stop20h 41mQantas Airways
Deal found 11/25$1,002
This Qantas Airways deal was found by Cheapflights users on 11/24. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:20 amPDX - SYD
1 stop31h 40mQantas Airways
Tue 1/137:15 pmSYD - PDX
2 stops37h 20mQantas Airways
Deal found 11/24$1,008
This United Airlines deal was found by Cheapflights users on 11/25. 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 12/1310:10 amPDX - MEL
1 stop28h 50mUnited Airlines
Sat 12/201:00 pmMEL - PDX
1 stop28h 46mUnited Airlines
Deal found 11/25$1,020
This Justfly.com deal was found by Cheapflights users on 11/25. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/264:26 pmPDX - MEL
1 stop22h 04mQantas Airways
Mon 1/129:00 pmMEL - PDX
2 stops42h 48mQantas Airways
Deal found 11/25$1,048
This Air Canada deal was found by Cheapflights users on 11/26. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/87:00 pmPDX - SYD
1 stop19h 35mAir Canada
Mon 12/154:00 pmSYD - PDX
1 stop21h 30mAir Canada
Deal found 11/26$1,073
This Air Canada deal was found by Cheapflights users on 11/25. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/263:15 pmPDX - SYD
1 stop23h 20mAir Canada
Mon 12/159:00 amSYD - PDX
2 stops19h 15mAir Canada
Deal found 11/25$1,087
This Cheapflightsfares deal was found by Cheapflights users on 11/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/82:58 pmPDX - SYD
2 stops24h 22mQantas Airways
Mon 12/157:00 amSYD - PDX
2 stops28h 30mQantas Airways
Deal found 11/26$1,105
This Air Canada deal was found by Cheapflights users on 11/25. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/263:15 pmPDX - SYD
1 stop23h 20mMultiple Airlines
Wed 12/37:05 amSYD - PDX
2 stops21h 10mMultiple Airlines
Deal found 11/25$1,110

Cheap flight deals from Portland to Australia

Keep the following information in mind while searching for Portland to Australia flight deals. Data was last updated November 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$792
(Vliegwinkel)

One-way from

$422
(Expedia)

Popular in

December

Cheapest in

September

Average price

$1,049
Provider with most accurate pricing for Portland-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Sydney Kingsford Smith flights.
Search Deals
From Portland to Australia
Search Deals
One-way flight from Portland to Australia
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($117 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland 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 November 26, 2025.
Use the filters below to find and compare flights from Portland to Australia that are best for you.

Fly from

Portland

Fly to

Australia

Route

Depart

Return

Price

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Sat 2/21

6:40 am-5:00 am

1 stop28h 20m

Brisbane

Sun 3/1

5:10 pm-5:19 pm

1 stop18h 09m

$844

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Thu 2/19

5:05 am-7:30 am

2 stops32h 25m

Brisbane

Mon 2/23

11:40 am-9:42 am

2 stops40h 02m

$871

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Tue 1/20

3:45 pm-7:30 am

2 stops45h 45m

Brisbane

Sat 1/31

11:40 am-9:45 am

2 stops40h 05m

$884

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Mon 12/15

4:02 pm-7:30 am

2 stops45h 28m

Brisbane

Wed 12/24

11:40 am-2:46 pm

1 stop21h 06m

$884

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Thu 1/15

6:22 pm-9:30 am

1 stop20h 08m

Melbourne

Tue 1/20

12:00 pm-2:48 pm

1 stop21h 48m

$950

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Tue 2/24

11:48 am-9:30 am

2 stops26h 42m

Melbourne

Sat 3/7

4:05 pm-9:17 pm

1 stop24h 12m

$954

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Sat 4/4

5:42 pm-6:45 am

1 stop20h 03m

Melbourne

Sun 5/3

9:45 am-4:26 pm

2 stops23h 41m

$954

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Tue 2/24

7:11 pm-8:00 am

2 stops41h 49m

Melbourne

Sun 6/14

10:00 am-11:53 pm

2 stops30h 53m

$985

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 12/29

6:20 am-9:00 am

1 stop31h 40m

Sydney Kingsford Smith

Tue 1/13

7:15 pm-1:35 pm

2 stops37h 20m

$1,008

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Tue 1/6

5:00 am-9:30 am

2 stops33h 30m

Melbourne

Mon 4/6

10:55 am-8:33 pm

1 stop26h 38m

$1,018

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/26

Showing 1-10 of 60 results
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Best time to book a flight from Portland to Australia

Have a flexible travel schedule? Discover the best time to fly to Australia from Portland 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 Portland to Australia

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

Currently, December is the cheapest month in which you can book a flight from Portland to Australia (average of $456). Flying from Portland to Australia in January is currently the most expensive (average of $954). 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.

What is the cheapest time of day to fly from PDX to AU?

Find hourly flight availability from Portland to Australia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 26, 2025.

It’s typically best to fly out from Portland to Australia in the evening. Doing so could potentially save you 5% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from Portland to Australia?

Use this chart to determine the cheapest time to fly round-trip from Portland to Australia. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Portland to Australia flight should consider departing on Sunday mornings when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Australia

Get insights into the airlines that provide service to Australia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Australia. Reviews last updated November 26, 2025.
See what other customers who have flown with Alaska Airlines, Delta, and Qantas Airways from Portland to Australia have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,354 reviews

Crew

8.5

Entertainment

7.0

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

LAX - LIH

The staff were exceptional! They all were kind, accommodating, and professional.
Alaska Airlines
8.0
Very good
11,354 reviews
Alaska Airlines
8.0
Very good
11,354 reviews

Crew

8.5

Entertainment

7.0

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

LAX - LIH

The staff were exceptional! They all were kind, accommodating, and professional.
Delta
7.9
Good
7,998 reviews
Alaska Airlines
8.0
Very good
11,354 reviews

Crew

8.5

Entertainment

7.0

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

LAX - LIH

The staff were exceptional! They all were kind, accommodating, and professional.
Qantas Airways
7.5
Good
944 reviews
Alaska Airlines
8.0
Very good
11,354 reviews

Crew

8.5

Entertainment

7.0

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

LAX - LIH

The staff were exceptional! They all were kind, accommodating, and professional.
United Airlines
7.4
Good
9,046 reviews
Alaska Airlines
8.0
Very good
11,354 reviews

Crew

8.5

Entertainment

7.0

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

LAX - LIH

The staff were exceptional! They all were kind, accommodating, and professional.
Air Canada
7.1
Good
10,476 reviews
Alaska Airlines
8.0
Very good
11,354 reviews

Crew

8.5

Entertainment

7.0

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

LAX - LIH

The staff were exceptional! They all were kind, accommodating, and professional.

Related info for your journey

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

  • What airport do you fly from for flights from Portland to Australia?

    For a flight from Portland to Australia, you will be flying from Portland. Portland (PDX) is just 6.0 mi from the center of the city.

  • How long is the flight from Portland to Australia?

    For as low as $844, American Airlines can have you in Australia from Portland in 28h 20m. Airlines will cover a distance of 7282 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Portland to Australia one-way?

    To fly one-way, consider booking your trip with American Airlines, which is currently one of the cheapest options available, starting at $434. Air Canada flights start at $515 while deals on Qantas Airways start at $550 one-way.

  • What are the most popular routes from Portland to Australia?

    The most popular flight routes from Portland to Australia are Portland - Sydney Kingsford Smith, Portland - Melbourne and Portland - Melbourne Avalon.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Portland 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 Portland to Australia?

    Currently, December is the cheapest month in which you can book a flight from Portland to Australia (average of $456). Flying from Portland to Australia in January is currently the most expensive (average of $954). 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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Alternative routes for Portland to Australia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Portland to Australia

Discover the top 7 airlines that operate flights from Portland 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 November 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$456Average$1,064FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$550Average$1,164FlexibilityNo cancel feeOn-time85%
Qantas AirwaysCheapest$757Average$1,489FlexibilityNo cancel feeOn-time74%
Air CanadaCheapest$840Average$1,156FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$872Average$1,113FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$952Average$974FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$999Average$1,184FlexibilityNo cancel feeOn-time75%

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