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Cheap flights from Portland to Australia from $590

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 4/3. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
20 Mar — 27 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portland to Australia

Enter your travel dates to find the best prices.

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 18 February 2026.

Thu 5/315:15
PDX
-
BNE
1 stop23h 30m
Air Canada
Thu 19/309:45
BNE
-
PDX
1 stop16h 30m
Air Canada
Deal found 16/2$1,064
Mon 6/409:50
PDX
-
BNE
1 stop28h 15m
Air Canada
Fri 17/410:00
BNE
-
PDX
1 stop25h 30m
Air Canada
Deal found 18/2$1,143
Sat 31/1019:10
PDX
-
BNE
1 stop19h 35m
Air Canada
Sun 8/1110:45
BNE
-
PDX
1 stop16h 40m
Air Canada
Deal found 17/2$1,158
Mon 1/615:25
PDX
-
BNE
1 stop22h 40m
Air Canada
Mon 8/610:00
BNE
-
PDX
1 stop21h 45m
Air Canada
Deal found 17/2$1,160
Thu 5/319:05
PDX
-
BNE
2 stops24h 20m
Multiple Airlines
Thu 19/309:45
BNE
-
PDX
1 stop21h 55m
Multiple Airlines
Deal found 14/2$1,163
Sat 25/409:50
PDX
-
BNE
1 stop28h 15m
Air Canada
Sun 10/510:00
BNE
-
PDX
1 stop16h 30m
Air Canada
Deal found 17/2$1,179
Tue 13/1015:30
PDX
-
BNE
1 stop22h 35m
Multiple Airlines
Tue 27/1005:05
BNE
-
PDX
2 stops21h 20m
Multiple Airlines
Deal found 17/2$1,196
Sun 9/819:45
PDX
-
MEL
2 stops23h 55m
Multiple Airlines
Sun 23/820:45
MEL
-
PDX
2 stops29h 46m
Multiple Airlines
Deal found 18/2$1,203
Sat 21/215:15
PDX
-
BNE
1 stop23h 30m
Multiple Airlines
Sun 1/322:55
BNE
-
PDX
2 stops28h 20m
Multiple Airlines
Deal found 16/2$1,206
Mon 1/619:45
PDX
-
BNE
2 stops22h 45m
Singapore Airlines
Mon 8/610:00
BNE
-
PDX
1 stop16h 30m
Singapore Airlines
Deal found 17/2$1,213
Fri 8/519:45
PDX
-
MEL
2 stops22h 40m
Multiple Airlines
Thu 21/506:00
MEL
-
PDX
2 stops25h 45m
Multiple Airlines
Deal found 18/2$1,235
Fri 28/819:45
PDX
-
MEL
2 stops22h 40m
Multiple Airlines
Mon 31/820:30
MEL
-
PDX
2 stops30h 01m
Multiple Airlines
Deal found 18/2$1,241

Find flight deals from Portland to Australia

Keep the following information in mind while searching for Portland to Australia flight deals. Data was last updated 18 February 2026.

Round-trip from

$1,064

One-way from

$590

Popular in

December

Cheapest in

June

Average price

$1,632
Air Canada
  • Air Canada
  • 5/3-19/3
  • 2 total stops
  • 40h 00m total
  • Portland to Australia
Search Deals
Air Canada
  • Air Canada
  • 4/3
  • 1 total stop
  • 23h 20m total
  • Portland to Australia
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($347 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($108 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise 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 647,157 searches. Data last updated 18 February 2026.
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

Thu 5/3

19:05-08:45

1 stop19h 40m

Brisbane

Thu 19/3

09:45-14:40

1 stop21h 55m

$1,138

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Mon 1/6

15:25-07:05

1 stop22h 40m

Brisbane

Mon 8/6

10:00-14:45

1 stop21h 45m

$1,160

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Tue 30/6

19:45-07:05

1 stop18h 20m

Brisbane

Tue 4/8

10:00-14:51

1 stop21h 51m

$1,160

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Mon 15/6

15:25-07:05

1 stop22h 40m

Brisbane

Tue 7/7

10:00-14:51

1 stop21h 51m

$1,160

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Thu 5/3

19:05-13:25

2 stops24h 20m

Brisbane

Thu 19/3

09:45-14:40

1 stop21h 55m

$1,163

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Sat 25/4

09:50-07:05

1 stop28h 15m

Brisbane

Sun 10/5

10:00-09:30

1 stop16h 30m

$1,179

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Wed 13/5

15:25-07:05

1 stop22h 40m

Brisbane

Wed 27/5

10:00-19:05

1 stop26h 05m

$1,179

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Sun 3/5

15:25-07:05

1 stop22h 40m

Brisbane

Sun 17/5

10:00-09:30

1 stop16h 30m

$1,179

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Tue 21/4

09:50-07:05

1 stop28h 15m

Brisbane

Tue 19/5

10:00-19:05

1 stop26h 05m

$1,180

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Sun 9/8

19:45-12:40

2 stops23h 55m

Melbourne

Sun 23/8

20:45-09:31

2 stops29h 46m

$1,203

Flights are sorted by cheapest return flights first.

Deals found on 17/2

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 return 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, February is the cheapest month in which you can book a flight from Portland to Australia (average of $713). Flying from Portland to Australia in April is currently the most expensive (average of $1,299). 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.

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 18 February 2026.
Check out reviews from past customers who have flown with United Airlines from Portland to Australia to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,314 reviews
Check prices

Crew

8.1

Entertainment

7.1

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,314 reviews
United Airlines
7.4
Good
9,314 reviews
Check prices

Crew

8.1

Entertainment

7.1

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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?

    If you book a flight to Australia from Portland, you will be flying from Portland, which is the city’s only airport. Portland (PDX) is located 9.7 km from the centre of Portland.

  • How long is the flight from Portland to Australia?

    Departing from Portland to Australia will take you 19h 11m. Portland and Australia are separated by a distance of 13053 km. This flight may include one or multiple stops.

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

    When deciding which route to take from Portland to Australia, consider Portland - Sydney Kingsford Smith, Portland - Melbourne or Portland - Melbourne Avalon, as they are the most popular.

  • 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 holiday 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, February is the cheapest month in which you can book a flight from Portland to Australia (average of $713). Flying from Portland to Australia in April is currently the most expensive (average of $1,299). 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.
Portland to Sydney flights
Portland to Melbourne flights
Boise to Sydney flights
Portland to Brisbane flights
Eugene to Sydney flights
Portland to Coolangatta flights
Portland to Perth flights

Top airline flying from Portland to Australia

Discover the top airline 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 647,157 searches. Data last updated 18 February 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$725Average$1,952FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Portland to Australia?

Cheapflights helps you search for flights from Portland to Australia via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Portland to Australia?

Cheapflights helps you find that perfect flight to Australia from Portland by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Portland to Australia with no change fees?

Yes, we can. To see specific flights from Portland to Australia with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Portland to Australia become cheaper?

Yes, Cheapflights offers price alerts on Portland to Australia flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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