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Cheap flights from Portland to Australia from $829

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 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
18 Jun — 25 Jun1
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 19 May 2026.

Sun 9/810:10
PDX
-
BNE
1 stop27h 55m
Air Canada
Mon 17/810:00
BNE
-
PDX
1 stop16h 31m
Air Canada
Deal found 19/5$1,455
Tue 20/1015:30
PDX
-
BNE
1 stop22h 35m
Air Canada
Tue 3/1110:45
BNE
-
PDX
1 stop25h 46m
Air Canada
Deal found 15/5$1,456
Tue 4/817:37
PDX
-
OOL
2 stops24h 53m
Multiple Airlines
Thu 20/812:30
OOL
-
PDX
2 stops25h 20m
Multiple Airlines
Deal found 17/5$1,482
Mon 18/519:45
PDX
-
SYD
1 stop18h 35m
Air Canada
Mon 1/609:20
SYD
-
PDX
1 stop17h 10m
Air Canada
Deal found 17/5$1,483
Sun 7/619:45
PDX
-
SYD
1 stop18h 35m
Air Canada
Sun 14/609:20
SYD
-
PDX
1 stop17h 10m
Air Canada
Deal found 19/5$1,489
Thu 2/711:54
PDX
-
MEL
2 stops25h 51m
American Airlines
Thu 9/709:45
MEL
-
PDX
1 stop29h 54m
American Airlines
Deal found 17/5$1,492
Mon 22/619:45
PDX
-
SYD
1 stop18h 35m
Air Canada
Tue 21/709:20
SYD
-
PDX
1 stop17h 11m
Air Canada
Deal found 19/5$1,492
Sun 9/819:45
PDX
-
BNE
2 stops28h 15m
Multiple Airlines
Mon 17/810:00
BNE
-
PDX
1 stop16h 31m
Multiple Airlines
Deal found 19/5$1,494
Sat 31/1019:10
PDX
-
BNE
1 stop20h 35m
Multiple Airlines
Sun 8/1106:10
BNE
-
PDX
2 stops21h 16m
Multiple Airlines
Deal found 18/5$1,496
Tue 20/1015:30
PDX
-
BNE
1 stop22h 35m
Multiple Airlines
Tue 3/1106:10
BNE
-
PDX
2 stops21h 16m
Multiple Airlines
Deal found 19/5$1,497
Sun 14/619:45
PDX
-
BNE
1 stop18h 20m
Multiple Airlines
Sat 20/617:55
BNE
-
PDX
2 stops32h 36m
Multiple Airlines
Deal found 17/5$1,499
Tue 4/810:10
PDX
-
BNE
1 stop27h 55m
Air Canada
Fri 21/810:00
BNE
-
PDX
1 stop26h 11m
Air Canada
Deal found 17/5$1,506

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 19 May 2026.

Round-trip from

$1,455

One-way from

$829

Popular in

December

Cheapest in

September

Average price

$1,612
Air Canada
  • Air Canada
  • 9/8-17/8
  • 2 total stops
  • 44h 26m total
  • Portland to Australia
Search Deals
Air New Zealand
  • Air New Zealand
  • 2/9
  • 2 total stops
  • 25h 45m total
  • Portland to Australia
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($317 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($104 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 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 19 May 2026.
Use the filters below to find and compare flights from Portland to Australia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Sat 31/10

15:15-08:45

1 stop24h 30m

Brisbane

Sun 8/11

10:45-18:31

1 stop25h 46m

$1,458

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Mon 2/11

19:10-13:25

2 stops24h 15m

Brisbane

Mon 16/11

10:45-18:31

1 stop25h 46m

$1,497

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Mon 29/6

15:27-06:45

1 stop22h 18m

Melbourne

Mon 6/7

09:45-16:38

2 stops23h 53m

$1,527

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

Wed 1/7

10:53-07:50

1 stop27h 57m

Melbourne

Wed 19/8

10:00-16:34

1 stop23h 34m

$1,546

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Sat 31/10

19:10-13:30

2 stops25h 20m

Brisbane

Sun 8/11

06:10-09:26

2 stops21h 16m

$1,583
Fastest return journey

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Thu 10/9

15:33-05:00

1 stop20h 27m

Brisbane

Sun 27/9

20:35-21:55

1 stop18h 20m

$1,608

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sun 14/6

05:00-06:55

2 stops32h 55m

Sydney Kingsford Smith

Sun 21/6

09:30-21:10

2 stops28h 40m

$1,638

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 23/6

05:00-07:00

2 stops33h 00m

Sydney Kingsford Smith

Sun 2/8

09:30-17:46

2 stops25h 16m

$1,638

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Fri 21/8

14:53-05:00

1 stop21h 07m

Brisbane

Sun 30/8

20:35-23:59

1 stop20h 24m

$1,639

PortlandCoolangatta

PDX - OOL

PDXOOL

Portland

Fri 3/7

19:45-10:40

2 stops21h 55m

Coolangatta Gold Coast

Fri 10/7

20:50-09:31

2 stops29h 41m

$1,649

Flights are sorted by cheapest return flights first.

Deals found on 18/5

Showing 1-10 of 58 resultsSorted by cheapest first
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2
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6

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, September is the cheapest month in which you can book a flight from Portland to Australia (average of $195). Flying from Portland to Australia in July is currently the most expensive (average of $1,156). 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.

How far ahead should I book a flight from Portland to Australia?

Booking 7 days in advance of your planned departure date is, on average, the best time to get cheap flights from Portland to Australia. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 19 May 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
9,733 reviews
Check prices

Food

6.6

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
United Airlines
7.4
Good
9,733 reviews
United Airlines
7.4
Good
9,733 reviews
Check prices

Food

6.6

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

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 22h 18m. 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, September is the cheapest month in which you can book a flight from Portland to Australia (average of $195). Flying from Portland to Australia in July is currently the most expensive (average of $1,156). 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.
Portland to Sydney flights
Portland to Melbourne flights
Boise to Sydney flights
Portland to Brisbane flights
Portland to Perth flights
Eugene 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 19 May 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$720Average$1,937FlexibilityNo 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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