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$476+ 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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
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 6, 2025.

This American Airlines deal was found by Cheapflights users on 11/6. 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.
Thu 11/206:00 amPDX - MEL
1 stop32h 30mAmerican Airlines
Tue 12/212:00 pmMEL - PDX
1 stop24h 12mAmerican Airlines
Deal found 11/6$940
This American Airlines deal was found by Cheapflights users on 11/6. 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.
Fri 11/215:42 pmPDX - MEL
1 stop20h 48mAmerican Airlines
Fri 12/54:05 pmMEL - PDX
1 stop22h 05mAmerican Airlines
Deal found 11/6$942
This Expedia deal was found by Cheapflights users on 11/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/62:58 pmPDX - BNE
1 stop20h 02mMultiple Airlines
Sat 12/137:50 pmBNE - PDX
2 stops45h 56mMultiple Airlines
Deal found 11/6$1,024
This United Airlines deal was found by Cheapflights users on 11/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/216:27 pmPDX - MEL
2 stops44h 03mUnited Airlines
Tue 12/3011:30 amMEL - PDX
2 stops41h 31mUnited Airlines
Deal found 11/6$1,033
This Cheapflightsfares deal was found by Cheapflights users on 11/5. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/264:26 pmPDX - BNE
1 stop19h 19mQantas Airways
Sun 1/115:05 amBNE - PDX
2 stops26h 36mQantas Airways
Deal found 11/5$1,068
This CheapOair deal was found by Cheapflights users on 11/6. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/69:50 amPDX - BNE
1 stop28h 55mAir Canada
Sat 12/1310:45 amBNE - PDX
1 stop25h 45mAir Canada
Deal found 11/6$1,079
This American Airlines deal was found by Cheapflights users on 11/5. 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.
Sat 11/1511:40 amPDX - MEL
2 stops26h 50mAmerican Airlines
Sat 12/612:00 pmMEL - PDX
1 stop24h 28mAmerican Airlines
Deal found 11/5$1,105
This Delta deal was found by Cheapflights users on 11/5. 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 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
Wed 12/2411:05 amBNE - PDX
1 stop25h 10mDelta
Deal found 11/5$1,117
This Air Canada deal was found by Cheapflights users on 11/4. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/49:50 amPDX - SYD
1 stop26h 05mAir Canada
Thu 12/1111:20 amSYD - PDX
1 stop26h 10mAir Canada
Deal found 11/4$1,118
This FlightHub deal was found by Cheapflights users on 11/5. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/267:00 pmPDX - SYD
1 stop19h 35mAir Canada
Mon 12/154:00 pmSYD - PDX
1 stop21h 30mAir Canada
Deal found 11/5$1,149
This Gotogate deal was found by Cheapflights users on 11/6. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/287:00 amPDX - SYD
1 stop17h 45mHawaiian Airlines
Thu 12/119:40 pmSYD - PDX
1 stop26h 45mHawaiian Airlines
Deal found 11/6$1,150
This Alaska Airlines deal was found by Cheapflights users on 11/6. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/107:09 amPDX - SYD
1 stop17h 36mAlaska Airlines
Fri 12/129:40 pmSYD - PDX
2 stops27h 20mAlaska Airlines
Deal found 11/6$1,159

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 6, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$866
(Delta)

One-way from

$515
(American Airlines)

Popular in

December

Cheapest in

September

Average price

$1,088
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. 8% potential increase in price ($106 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($28 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 6, 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

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Thu 11/20

6:00 am-9:30 am

1 stop32h 30m

Melbourne

Tue 12/2

12:00 pm-5:12 pm

1 stop24h 12m

$940

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Tue 1/20

3:15 pm-8:45 am

1 stop23h 30m

Brisbane

Sat 1/31

10:45 am-9:15 am

1 stop16h 30m

$965

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Tue 1/20

9:50 am-8:45 am

1 stop28h 55m

Brisbane

Sat 1/31

6:10 am-9:15 am

2 stops21h 05m

$982

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Mon 12/15

10:45 am-8:20 am

1 stop27h 35m

Brisbane

Wed 12/24

11:05 am-6:15 pm

1 stop25h 10m

$1,117

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Sun 1/11

4:51 pm-9:35 am

2 stops21h 44m

Melbourne

Sat 1/24

12:00 pm-5:52 pm

1 stop24h 52m

$1,145

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Wed 12/10

10:10 am-10:00 am

1 stop28h 50m

Melbourne

Mon 12/22

1:00 pm-2:46 pm

1 stop20h 46m

$1,159

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 11/10

7:09 am-7:45 pm

1 stop17h 36m

Sydney Kingsford Smith

Fri 12/12

9:40 pm-8:50 pm

1 stop18h 10m

$1,159

PortlandSydney

PDX - SYD

PDXSYD

Portland

Thu 1/29

7:00 am-7:45 pm

1 stop17h 45m

Sydney Kingsford Smith

Sun 2/15

9:40 pm-6:00 am

1 stop27h 20m

$1,160

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sat 1/31

7:00 am-7:45 pm

1 stop17h 45m

Sydney Kingsford Smith

Sun 5/3

9:40 pm-10:50 pm

1 stop18h 10m

$1,160

PortlandSydney

PDX - SYD

PDXSYD

Portland

Thu 1/22

5:45 pm-7:45 pm

2 stops31h 00m

Sydney Kingsford Smith

Fri 2/6

9:40 pm-6:00 am

2 stops27h 20m

$1,160

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

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 July is currently the most expensive (average of $956). 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 6, 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 6, 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
11,247 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

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
11,247 reviews
Alaska Airlines
8.0
Very good
11,247 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

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
8,001 reviews
Alaska Airlines
8.0
Very good
11,247 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

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
929 reviews
Alaska Airlines
8.0
Very good
11,247 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

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
9,007 reviews
Alaska Airlines
8.0
Very good
11,247 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

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
10,416 reviews
Alaska Airlines
8.0
Very good
11,247 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

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 $965, American Airlines can have you in Australia from Portland in 23h 30m. 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 Air Canada, which is currently one of the cheapest options available, starting at $510. American Airlines flights start at $515 while deals on United Airlines start at $530 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 July is currently the most expensive (average of $956). 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 6, 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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