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Cheap flights from Portland to Australia from $714

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 13/8. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
31 Jul — 7 Aug1
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 July 2026.

Fri 18/917:30
PDX
-
SYD
2 stops25h 20m
Multiple Airlines
Thu 24/913:15
SYD
-
PDX
3 stops44h 20m
Multiple Airlines
Deal found 29/6$1,413
Mon 14/907:03
PDX
-
SYD
2 stops35h 47m
Multiple Airlines
Sun 27/913:15
SYD
-
PDX
2 stops25h 40m
Multiple Airlines
Deal found 27/6$1,439
Tue 20/1010:10
PDX
-
BNE
1 stop27h 55m
Air Canada
Tue 3/1110:45
BNE
-
PDX
1 stop16h 41m
Air Canada
Deal found 1/7$1,497
Sat 7/1115:15
PDX
-
BNE
1 stop23h 30m
Air Canada
Wed 25/1110:45
BNE
-
PDX
1 stop28h 01m
Air Canada
Deal found 26/6$1,498
Sat 7/1114:45
PDX
-
BNE
2 stops25h 30m
Multiple Airlines
Wed 25/1111:25
BNE
-
PDX
3 stops27h 23m
Multiple Airlines
Deal found 26/6$1,527
Mon 31/819:45
PDX
-
BNE
1 stop18h 20m
Multiple Airlines
Wed 18/1106:10
BNE
-
PDX
2 stops21h 16m
Multiple Airlines
Deal found 30/6$1,534
Sun 8/1119:10
PDX
-
AVV
2 stops23h 55m
Multiple Airlines
Sun 29/1106:00
AVV
-
PDX
2 stops22h 26m
Multiple Airlines
Deal found 29/6$1,534
Sat 31/1019:10
PDX
-
BNE
1 stop20h 35m
Multiple Airlines
Sun 8/1106:10
BNE
-
PDX
2 stops21h 16m
Multiple Airlines
Deal found 1/7$1,536
Wed 4/1107:00
PDX
-
SYD
1 stop17h 45m
Multiple Airlines
Tue 10/1121:40
SYD
-
PDX
1 stop18h 09m
Multiple Airlines
Deal found 27/6$1,542
Sun 4/1019:45
PDX
-
MEL
2 stops22h 25m
Multiple Airlines
Wed 14/1006:05
MEL
-
PDX
2 stops21h 26m
Multiple Airlines
Deal found 26/6$1,546
Sat 8/819:45
PDX
-
BNE
1 stop18h 20m
Air Canada
Sun 16/810:00
BNE
-
PDX
1 stop21h 51m
Air Canada
Deal found 1/7$1,550
Mon 10/819:45
PDX
-
MEL
2 stops22h 35m
Multiple Airlines
Mon 17/821:05
MEL
-
PDX
2 stops29h 26m
Multiple Airlines
Deal found 26/6$1,556

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 July 2026.

Round-trip from

$1,413

One-way from

$714

Popular in

December

Cheapest in

September

Average price

$1,885
18/9-24/9
  • 18/9-24/9
  • 5 total stops
  • 69h 40m total
  • Portland to Australia
Search Deals
13/8
  • 13/8
  • 2 total stops
  • 25h 14m total
  • Portland to Australia
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($351 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($111 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 July 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

Tue 20/10

10:10-07:05

1 stop27h 55m

Brisbane

Tue 3/11

10:45-09:26

1 stop16h 41m

$1,497

PortlandMelbourne

PDX - AVV

PDXAVV

Portland

Sun 8/11

19:10-14:05

2 stops23h 55m

Melbourne Avalon

Sun 29/11

06:00-09:26

2 stops22h 26m

$1,534

PortlandMelbourne

PDX - AVV

PDXAVV

Portland

Sat 3/10

19:45-15:35

2 stops25h 50m

Melbourne Avalon

Mon 12/10

06:00-09:31

2 stops21h 31m

$1,588

PortlandMelbourne

PDX - AVV

PDXAVV

Portland

Sat 3/10

19:45-15:35

2 stops25h 50m

Melbourne Avalon

Tue 13/10

06:00-09:31

2 stops21h 31m

$1,588
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

$1,613

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

$1,624

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Thu 26/11

19:10-15:30

2 stops26h 20m

Brisbane

Thu 3/12

10:45-14:41

1 stop21h 56m

$1,655

PortlandMelbourne

PDX - AVV

PDXAVV

Portland

Mon 26/10

19:10-14:05

2 stops24h 55m

Melbourne Avalon

Thu 19/11

06:00-09:26

2 stops22h 26m

$1,661

PortlandCoolangatta

PDX - OOL

PDXOOL

Portland

Fri 16/10

15:30-10:40

2 stops26h 10m

Coolangatta Gold Coast

Fri 30/10

06:00-20:46

2 stops31h 46m

$1,685

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

Wed 9/12

13:39-07:30

1 stop23h 51m

Brisbane

Wed 30/12

11:40-18:31

1 stop24h 51m

$1,710

Flights are sorted by cheapest return flights first.

Deals found on 26/6

Showing 1-10 of 60 resultsSorted by cheapest first
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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, April is the cheapest month in which you can book a flight from Portland to Australia (average of $257). Flying from Portland to Australia in July is currently the most expensive (average of $1,194). 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 24 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 1 July 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
9,909 reviews
Check prices

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

Reviews

1 / 20
6.0
Good

ROHIT,June 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this
United Airlines
7.4
Good
9,909 reviews
United Airlines
7.4
Good
9,909 reviews
Check prices

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

Reviews

1 / 20
6.0
Good

ROHIT,June 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this

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 21h 15m. 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 - 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, April is the cheapest month in which you can book a flight from Portland to Australia (average of $257). Flying from Portland to Australia in July is currently the most expensive (average of $1,194). 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
Eugene to Sydney flights
Portland to Perth flights
Portland to Brisbane 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 July 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$743Average$2,076FlexibilityNo 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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