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$389+ 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 11/22. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
jul. 5 — jul. 121
sáb. 7/5
sáb. 7/12
1 adult, Economy
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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 junio 30, 2025.

Round-trip from

$758
(oojo)

One-way from

$389
(Alaska Airlines)

Popular in

December

Cheapest in

May

Average price

$1,087
From Portland to Australia
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One-way flight from Portland to Australia
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Highest demand for flights based on searches. 13% potential increase in price ($184 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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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 junio 30, 2025.

This oojo deal was found by Cheapflights users on 6/30. 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.
sáb. 9/62:56 pmPDX - SYD
1 stop23h 09mQantas Airways
mié. 9/175:45 pmSYD - PDX
1 stop19h 45mQantas Airways
Deal found 6/30$758
This Alaska Airlines deal was found by Cheapflights users on 6/27. 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.
mié. 8/131:25 pmPDX - SYD
2 stops24h 40mAlaska Airlines
mié. 8/279:10 amSYD - PDX
1 stop21h 14mAlaska Airlines
Deal found 6/27$770
This Air Canada deal was found by Cheapflights users on 6/28. 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.
vie. 8/87:40 pmPDX - SYD
1 stop18h 40mAir Canada
jue. 8/219:20 amSYD - PDX
1 stop26h 26mAir Canada
Deal found 6/28$788
This American Airlines deal was found by Cheapflights users on 6/30. 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.
sáb. 8/92:56 pmPDX - SYD
1 stop23h 09mAmerican Airlines
lun. 8/259:10 amSYD - PDX
2 stops24h 38mAmerican Airlines
Deal found 6/30$808
This United Airlines deal was found by Cheapflights users on 6/28. 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.
vie. 8/812:55 pmPDX - SYD
2 stops25h 05mUnited Airlines
jue. 8/219:30 amSYD - PDX
2 stops22h 35mUnited Airlines
Deal found 6/28$824
This Delta deal was found by Cheapflights users on 6/28. 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.
mar. 8/125:35 amPDX - SYD
2 stops32h 00mDelta
mar. 8/199:25 amSYD - PDX
1 stop23h 34mDelta
Deal found 6/28$881
This Orbitz deal was found by Cheapflights users on 6/29. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/65:40 pmPDX - AVV
2 stops36h 10mMultiple Airlines
jue. 8/216:00 amAVV - PDX
2 stops30h 10mMultiple Airlines
Deal found 6/29$919
This Aunt Betty deal was found by Cheapflights users on 6/29. 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 Aunt Betty is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/72:55 pmPDX - SYD
1 stop21h 30mMultiple Airlines
sáb. 11/155:45 pmSYD - PDX
1 stop21h 50mMultiple Airlines
Deal found 6/29$932
This Orbitz deal was found by Cheapflights users on 6/29. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/65:40 pmPDX - MEL
2 stops26h 35mMultiple Airlines
jue. 8/211:55 pmMEL - PDX
2 stops23h 35mMultiple Airlines
Deal found 6/29$978
This Cheapflightsfares deal was found by Cheapflights users on 6/28. 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.
mar. 8/195:40 pmPDX - MEL
2 stops23h 55mQantas Airways
dom. 8/3110:00 amMEL - PDX
2 stops26h 10mQantas Airways
Deal found 6/28$979
This Cheapflightsfares deal was found by Cheapflights users on 6/28. 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.
mar. 9/165:36 pmPDX - BNE
2 stops24h 59mQantas Airways
mar. 9/308:45 pmBNE - PDX
2 stops36h 45mQantas Airways
Deal found 6/28$980
This Travelocity deal was found by Cheapflights users on 6/27. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/263:15 pmPDX - BNE
1 stop23h 30mMultiple Airlines
dom. 12/146:30 pmBNE - PDX
2 stops32h 45mMultiple Airlines
Deal found 6/27$1,014

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 junio 30, 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

PortlandSydney

PDX - SYD

PDXSYD

Portland

sáb. 9/6

2:56 pm-7:05 am

1 stop23h 09m

Sydney Kingsford Smith

mié. 9/17

5:45 pm-8:30 pm

1 stop19h 45m

$758

PortlandSydney

PDX - SYD

PDXSYD

Portland

mié. 8/13

1:25 pm-7:05 am

2 stops24h 40m

Sydney Kingsford Smith

mié. 8/27

9:10 am-1:24 pm

1 stop21h 14m

$770

PortlandSydney

PDX - SYD

PDXSYD

Portland

vie. 8/8

7:40 pm-7:20 am

1 stop18h 40m

Sydney Kingsford Smith

jue. 8/21

9:20 am-6:46 pm

1 stop26h 26m

$788

PortlandSydney

PDX - SYD

PDXSYD

Portland

sáb. 8/9

2:56 pm-7:05 am

1 stop23h 09m

Sydney Kingsford Smith

lun. 8/25

9:10 am-4:48 pm

2 stops24h 38m

$808

PortlandSydney

PDX - SYD

PDXSYD

Portland

vie. 8/8

12:55 pm-7:00 am

2 stops25h 05m

Sydney Kingsford Smith

jue. 8/21

9:30 am-3:05 pm

2 stops22h 35m

$824

PortlandSydney

PDX - SYD

PDXSYD

Portland

mar. 8/12

5:35 am-6:35 am

2 stops32h 00m

Sydney Kingsford Smith

mar. 8/19

9:25 am-3:59 pm

1 stop23h 34m

$881

PortlandMelbourne

PDX - AVV

PDXAVV

Portland

mié. 8/6

5:40 pm-10:50 pm

2 stops36h 10m

Melbourne Avalon

jue. 8/21

6:00 am-7:10 pm

2 stops30h 10m

$919

PortlandSydney

PDX - SYD

PDXSYD

Portland

vie. 11/7

2:55 pm-7:25 am

1 stop21h 30m

Sydney Kingsford Smith

sáb. 11/15

5:45 pm-8:35 pm

1 stop21h 50m

$932

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

mié. 8/6

5:40 pm-1:15 pm

2 stops26h 35m

Melbourne

jue. 8/21

1:55 pm-8:30 pm

2 stops23h 35m

$978

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

mar. 8/19

5:40 pm-10:35 am

2 stops23h 55m

Melbourne

dom. 8/31

10:00 am-7:10 pm

2 stops26h 10m

$979

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/28

Showing 1-10 of 44 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, March is the cheapest month in which you can book a flight from Portland to Australia (average of $1,039). Flying from Portland to Australia in December is currently the most expensive (average of $1,636). 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 junio 30, 2025.

When flying from Portland to Australia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 junio 30, 2025.
See what other customers who have flown with Singapore Airlines, Fiji Airways, and Delta 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.
Singapore Airlines
8.1
Very good
1,319 reviews

Crew

8.6

Boarding

8.2

Comfort

7.9

Overall

8.1

Entertainment

8.0

Food

7.7

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Singapore Airlines
8.1
Very good
1,319 reviews
Singapore Airlines
8.1
Very good
1,319 reviews

Crew

8.6

Boarding

8.2

Comfort

7.9

Overall

8.1

Entertainment

8.0

Food

7.7

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Fiji Airways
8.0
Very good
202 reviews
Singapore Airlines
8.1
Very good
1,319 reviews

Crew

8.6

Boarding

8.2

Comfort

7.9

Overall

8.1

Entertainment

8.0

Food

7.7

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Delta
8.0
Very good
7,973 reviews
Singapore Airlines
8.1
Very good
1,319 reviews

Crew

8.6

Boarding

8.2

Comfort

7.9

Overall

8.1

Entertainment

8.0

Food

7.7

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Air New Zealand
8.0
Very good
486 reviews
Singapore Airlines
8.1
Very good
1,319 reviews

Crew

8.6

Boarding

8.2

Comfort

7.9

Overall

8.1

Entertainment

8.0

Food

7.7

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Alaska Airlines
8.0
Very good
10,000 reviews
Singapore Airlines
8.1
Very good
1,319 reviews

Crew

8.6

Boarding

8.2

Comfort

7.9

Overall

8.1

Entertainment

8.0

Food

7.7

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.

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.

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

    To fly one-way, consider booking your trip with Alaska Airlines, which is currently one of the cheapest options available, starting at $389. Qantas Airways flights start at $423 while deals on United Airlines start at $582 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, March is the cheapest month in which you can book a flight from Portland to Australia (average of $1,039). Flying from Portland to Australia in December is currently the most expensive (average of $1,636). 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

Browse thousands of different options on Cheapflights for your next trip

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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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Boise to Papeete flights
Portland to Rotorua flights
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Portland to Napier flights
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Boise to Christchurch flights
Portland to Fare flights
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Top 9 airlines flying from Portland to Australia

Discover the top 9 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 junio 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$456Average$1,163FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$680Average$1,159FlexibilityNo cancel feeOn-time85%
Air CanadaCheapest$850Average$1,266FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$872Average$1,292FlexibilityNo cancel feeOn-time69%
Qantas AirwaysCheapest$1,036Average$1,566FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$1,055Average$1,179FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$1,068Average$1,223FlexibilityNo cancel feeOn-time75%
Qatar AirwaysCheapest$1,286Average$1,360FlexibilityNo cancel feeOn-time68%
Singapore AirlinesCheapest$1,374Average$1,473FlexibilityNo cancel feeOn-time81%

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