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$489+ 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 3/2. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
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 13, 2025.

This American Airlines deal was found by Cheapflights users on 11/10. 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.
Fri 11/147:40 amPDX - BNE
1 stop28h 50mAmerican Airlines
Sun 11/167:40 pmBNE - PDX
1 stop20h 45mAmerican Airlines
Deal found 11/10$848
This American Airlines deal was found by Cheapflights users on 11/13. 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.
Thu 11/1311:40 amPDX - BNE
2 stops23h 20mAmerican Airlines
Thu 11/207:40 pmBNE - PDX
1 stop20h 45mAmerican Airlines
Deal found 11/13$849
This Delta deal was found by Cheapflights users on 11/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/1510:45 amPDX - BNE
1 stop27h 35mDelta
Sun 12/2810:40 amBNE - PDX
1 stop18h 21mDelta
Deal found 11/12$867
This Delta deal was found by Cheapflights users on 11/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/158:10 pmPDX - BNE
1 stop18h 10mDelta
Wed 12/2411:05 amBNE - PDX
1 stop29h 19mDelta
Deal found 11/12$872
This Qantas Airways deal was found by Cheapflights users on 11/10. 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 11/143:29 pmPDX - BNE
2 stops24h 11mMultiple Airlines
Sun 11/167:40 pmBNE - PDX
1 stop20h 45mMultiple Airlines
Deal found 11/10$875
This American Airlines deal was found by Cheapflights users on 11/12. 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 11/127:40 amPDX - MEL
1 stop26h 20mAmerican Airlines
Wed 11/194:05 pmMEL - PDX
1 stop22h 04mAmerican Airlines
Deal found 11/12$950
This American Airlines deal was found by Cheapflights users on 11/12. 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.
Sat 11/1511:40 amPDX - MEL
2 stops26h 50mAmerican Airlines
Sat 11/2912:00 pmMEL - PDX
1 stop24h 12mAmerican Airlines
Deal found 11/12$955
This American Airlines deal was found by Cheapflights users on 11/11. 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.
Thu 11/206:00 amPDX - MEL
1 stop32h 30mAmerican Airlines
Tue 12/21:30 pmMEL - PDX
2 stops22h 42mAmerican Airlines
Deal found 11/11$977
This Qantas Airways deal was found by Cheapflights users on 11/12. 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 11/12$1,009
This oojo deal was found by Cheapflights users on 11/12. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/167:20 amPDX - SYD
2 stops33h 15mQantas Airways
Tue 11/189:25 pmSYD - PDX
1 stop18h 25mQantas Airways
Deal found 11/12$1,011
This Jetabroad deal was found by Cheapflights users on 11/10. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/143:29 pmPDX - SYD
1 stop19h 41mMultiple Airlines
Sun 11/169:25 pmSYD - PDX
1 stop18h 25mMultiple Airlines
Deal found 11/10$1,073
This oojo deal was found by Cheapflights users on 11/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/85:41 amPDX - SYD
2 stops44h 09mQantas Airways
Mon 12/1511:20 amSYD - PDX
1 stop25h 08mQantas Airways
Deal found 11/11$1,080

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 13, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$842
(Air Canada)

One-way from

$530
(United Airlines)

Popular in

December

Cheapest in

June

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 ($120 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 13, 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

Mon 12/15

10:45 am-8:20 am

1 stop27h 35m

Brisbane

Sun 12/28

10:40 am-11:01 am

1 stop18h 21m

$867

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Mon 12/15

8:10 pm-8:20 am

1 stop18h 10m

Brisbane

Wed 12/24

11:05 am-10:24 pm

1 stop29h 19m

$872

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Thu 3/19

7:00 pm-1:05 pm

2 stops24h 05m

Melbourne

Tue 3/24

7:00 am-6:30 pm

2 stops29h 30m

$933

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Tue 2/24

11:48 am-9:30 am

2 stops26h 42m

Melbourne

Sat 3/7

4:05 pm-7:39 pm

1 stop22h 34m

$955

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Tue 1/20

9:40 am-8:45 am

1 stop29h 05m

Brisbane

Sat 1/31

10:45 am-6:30 pm

1 stop25h 45m

$965

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Tue 1/20

3:15 pm-8:45 am

1 stop23h 30m

Brisbane

Sat 1/31

6:10 am-2:40 pm

2 stops26h 30m

$982

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Sat 4/4

3:50 pm-9:30 am

2 stops24h 40m

Melbourne

Sun 5/3

9:45 am-4:26 pm

2 stops23h 41m

$983

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Fri 1/16

7:00 pm-7:00 am

2 stops42h 00m

Brisbane

Sun 1/25

10:45 am-9:15 am

1 stop16h 30m

$996

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

$1,009

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Tue 4/7

12:09 pm-6:45 am

1 stop25h 36m

Melbourne

Fri 4/17

9:45 am-10:31 pm

1 stop29h 46m

$1,010

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/13

Showing 1-10 of 54 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 13, 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 13, 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
11,288 reviews

Entertainment

7.0

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Alaska Airlines
8.0
Very good
11,288 reviews
Alaska Airlines
8.0
Very good
11,288 reviews

Entertainment

7.0

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Delta
7.9
Good
8,007 reviews
Alaska Airlines
8.0
Very good
11,288 reviews

Entertainment

7.0

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Qantas Airways
7.5
Good
934 reviews
Alaska Airlines
8.0
Very good
11,288 reviews

Entertainment

7.0

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
United Airlines
7.4
Good
9,017 reviews
Alaska Airlines
8.0
Very good
11,288 reviews

Entertainment

7.0

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Air Canada
7.1
Good
10,449 reviews
Alaska Airlines
8.0
Very good
11,288 reviews

Entertainment

7.0

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.

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 $933, Delta can have you in Australia from Portland in 24h 05m. Airlines will cover a distance of 8111 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 United Airlines, which is currently one of the cheapest options available, starting at $530. Qantas Airways flights start at $546 while deals on Air Canada start at $549 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 - Brisbane.

  • 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 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$456Average$954FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$550Average$1,161FlexibilityNo cancel feeOn-time85%
Air CanadaCheapest$840Average$1,213FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$872Average$1,238FlexibilityNo cancel feeOn-time69%
Qantas AirwaysCheapest$898Average$1,550FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$952Average$974FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$999Average$1,184FlexibilityNo cancel feeOn-time75%

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