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Cheap flights from Portland to Australia from $608

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 16/3. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
3 3月 — 10 3月1
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 1 2月 2026.

週一 23/219:05
PDX
-
BNE
1 stop19h 40m
Air Canada
週三 29/410:00
BNE
-
PDX
1 stop16h 10m
Air Canada
Deal found 31/1$1,233
週六 31/1019:10
PDX
-
BNE
1 stop19h 35m
Air Canada
週日 8/1110:45
BNE
-
PDX
1 stop21h 55m
Air Canada
Deal found 30/1$1,244
週四 5/319:05
PDX
-
BNE
1 stop19h 40m
Air Canada
週四 19/309:45
BNE
-
PDX
1 stop25h 45m
Air Canada
Deal found 31/1$1,246
週一 23/209:50
PDX
-
BNE
1 stop28h 55m
Multiple Airlines
週四 30/420:40
BNE
-
PDX
2 stops29h 50m
Multiple Airlines
Deal found 31/1$1,274
週二 3/215:22
PDX
-
BNE
1 stop19h 38m
Qantas Airways
週四 5/218:30
BNE
-
PDX
2 stops37h 11m
Qantas Airways
Deal found 30/1$1,283
週日 1/214:30
PDX
-
SYD
1 stop20h 40m
Qantas Airways
週日 8/207:05
SYD
-
PDX
2 stops29h 47m
Qantas Airways
Deal found 31/1$1,283
週四 5/319:05
PDX
-
BNE
2 stops24h 20m
Multiple Airlines
週四 19/309:45
BNE
-
PDX
1 stop16h 30m
Multiple Airlines
Deal found 31/1$1,286
週五 20/315:15
PDX
-
BNE
1 stop23h 30m
Multiple Airlines
週四 9/420:40
BNE
-
PDX
2 stops29h 30m
Multiple Airlines
Deal found 31/1$1,289
週日 3/510:10
PDX
-
BNE
1 stop27h 55m
Air Canada
週日 17/510:00
BNE
-
PDX
1 stop16h 30m
Air Canada
Deal found 30/1$1,306
週二 12/515:25
PDX
-
BNE
1 stop22h 40m
Air Canada
週一 18/510:00
BNE
-
PDX
1 stop26h 05m
Air Canada
Deal found 31/1$1,307
週六 31/1019:10
PDX
-
BNE
2 stops25h 20m
Multiple Airlines
週日 8/1106:10
BNE
-
PDX
2 stops21h 15m
Multiple Airlines
Deal found 30/1$1,319
週三 4/319:05
PDX
-
BNE
2 stops24h 20m
Multiple Airlines
週三 18/305:05
BNE
-
PDX
2 stops30h 25m
Multiple Airlines
Deal found 31/1$1,320

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 1 2月 2026.

Round-trip from

$1,233

One-way from

$608

Popular in

December

Cheapest in

June

Average price

$1,647
Air Canada
  • Air Canada
  • 23/2-30/4
  • 2 total stops
  • 39h 35m total
  • Portland to Australia
Search Deals
16/3
  • 16/3
  • 2 total stops
  • 32h 42m total
  • Portland to Australia
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($385 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($114 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 1 2月 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

週三 13/5

10:10-07:05

1 stop27h 55m

Brisbane

週三 27/5

10:00-19:05

1 stop26h 05m

$1,306

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

週日 3/5

10:10-07:05

1 stop27h 55m

Brisbane

週日 17/5

10:00-09:30

1 stop16h 30m

$1,306

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

週二 17/3

06:28-09:30

1 stop33h 02m

Melbourne

週二 24/3

12:00-17:08

1 stop23h 08m

$1,355

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

週五 27/2

17:39-09:30

1 stop20h 51m

Melbourne

週二 10/3

12:00-16:41

1 stop22h 41m

$1,370

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

週五 8/5

13:09-06:45

1 stop24h 36m

Melbourne

週四 21/5

09:45-21:29

1 stop28h 44m

$1,376

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

週五 8/5

19:45-11:25

2 stops22h 40m

Melbourne

週四 21/5

06:00-09:30

2 stops20h 30m

$1,379

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

週四 9/4

19:05-11:25

2 stops23h 20m

Melbourne

週一 20/4

06:00-09:10

2 stops20h 10m

$1,380

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

週四 9/4

11:48-06:45

2 stops25h 57m

Melbourne

週一 20/4

13:35-23:54

1 stop27h 19m

$1,383

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

週二 24/2

19:05-17:15

2 stops27h 10m

Melbourne

週六 7/3

08:10-14:40

2 stops25h 30m

$1,383

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

週三 13/5

11:56-05:00

2 stops24h 04m

Brisbane

週三 27/5

20:35-21:29

1 stop17h 54m

$1,388

Flights are sorted by cheapest return flights first.

Deals found on 30/1

Showing 1-10 of 40 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 $723). Flying from Portland to Australia in April is currently the most expensive (average of $1,317). 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 1 2月 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
9,219 reviews
Check prices

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

Crew

8.1

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
9,219 reviews
United Airlines
7.4
Good
9,219 reviews
Check prices

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

Crew

8.1

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 27h 55m. Portland and Australia are separated by a distance of 11719 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 - Brisbane, 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 $723). Flying from Portland to Australia in April is currently the most expensive (average of $1,317). 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
Portland to Brisbane flights
Eugene to Sydney flights
Portland to Perth flights
Boise to Sydney flights
Portland to Coolangatta 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 1 2月 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,317Average$2,556FlexibilityNo 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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