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Cheap flights from Portland to Australia from $677

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 7/6. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
5 mag — 12 mag1
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 5 aprile 2026.

sab 31/1019:10
PDX
-
BNE
1 stop19h 35m
Air Canada
dom 8/1110:45
BNE
-
PDX
1 stop25h 45m
Air Canada
Deal found 31/3$1,242
mar 12/510:10
PDX
-
BNE
1 stop27h 55m
Air Canada
mar 19/510:15
BNE
-
PDX
1 stop16h 15m
Air Canada
Deal found 3/4$1,243
sab 31/1010:05
PDX
-
BNE
1 stop28h 40m
Multiple Airlines
dom 8/1106:10
BNE
-
PDX
2 stops21h 15m
Multiple Airlines
Deal found 31/3$1,281
mer 13/510:10
PDX
-
BNE
1 stop27h 55m
Multiple Airlines
mer 27/519:25
BNE
-
PDX
2 stops31h 05m
Multiple Airlines
Deal found 31/3$1,282
dom 17/515:30
PDX
-
BNE
2 stops30h 00m
Air Canada
dom 24/510:00
BNE
-
PDX
1 stop16h 30m
Air Canada
Deal found 2/4$1,289
mer 21/1019:45
PDX
-
MEL
2 stops22h 25m
Multiple Airlines
lun 2/1107:25
MEL
-
PDX
2 stops21h 00m
Multiple Airlines
Deal found 2/4$1,298
ven 8/519:45
PDX
-
MEL
2 stops22h 35m
Multiple Airlines
gio 21/521:05
MEL
-
PDX
2 stops29h 25m
Multiple Airlines
Deal found 1/4$1,300
mer 17/619:45
PDX
-
MEL
2 stops22h 40m
Multiple Airlines
ven 17/706:00
MEL
-
PDX
2 stops25h 51m
Multiple Airlines
Deal found 31/3$1,301
mar 8/919:45
PDX
-
MEL
2 stops30h 35m
Multiple Airlines
mar 15/906:00
MEL
-
PDX
2 stops25h 51m
Multiple Airlines
Deal found 31/3$1,304
mar 5/519:45
PDX
-
MEL
2 stops25h 30m
Multiple Airlines
mar 12/517:30
MEL
-
PDX
2 stops33h 00m
Multiple Airlines
Deal found 5/4$1,307
ven 22/519:45
PDX
-
BNE
2 stops23h 20m
Multiple Airlines
dom 31/520:40
BNE
-
PDX
2 stops29h 50m
Multiple Airlines
Deal found 2/4$1,308
dom 1/1119:10
PDX
-
MEL
2 stops23h 25m
Multiple Airlines
gio 12/1107:25
MEL
-
PDX
2 stops21h 00m
Multiple Airlines
Deal found 2/4$1,308

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 5 aprile 2026.

Round-trip from

$1,242

One-way from

$677

Popular in

December

Cheapest in

September

Average price

$1,669
Air Canada
  • Air Canada
  • 13/5-27/5
  • 2 total stops
  • 44h 25m total
  • Portland to Australia
Search Deals
7/6
  • 7/6
  • 2 total stops
  • 25h 19m total
  • Portland to Australia
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($320 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($109 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 5 aprile 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

mer 20/5

15:30-07:05

1 stop22h 35m

Brisbane

mer 27/5

10:00-09:30

1 stop16h 30m

$1,350

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

mar 5/5

10:10-07:05

1 stop27h 55m

Brisbane

mar 12/5

19:25-09:30

2 stops31h 05m

$1,392

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

ven 19/6

19:45-12:05

2 stops23h 20m

Brisbane

ven 31/7

20:15-09:31

2 stops30h 16m

$1,581

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

gio 20/8

19:14-07:50

2 stops43h 36m

Melbourne

ven 28/8

10:00-18:41

2 stops25h 41m

$1,637

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

lun 4/5

21:32-05:00

1 stop38h 28m

Brisbane

lun 11/5

20:35-23:44

1 stop20h 09m

$1,737

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

mer 6/5

19:45-08:15

1 stop19h 30m

Melbourne

dom 10/5

10:55-12:35

1 stop18h 40m

$1,765

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

mer 27/5

11:16-08:15

1 stop27h 59m

Melbourne

mer 17/6

10:55-16:47

1 stop22h 52m

$1,766

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

mer 9/9

13:14-08:15

1 stop26h 01m

Melbourne

mar 22/9

10:55-09:21

2 stops39h 26m

$1,770

PortlandMelbourne

PDX - MEL

PDXMEL

Portland

mar 4/8

11:05-08:15

2 stops28h 10m

Melbourne

mar 18/8

10:55-14:47

1 stop20h 52m

$1,770
Fastest return journey

PortlandBrisbane

PDX - BNE

PDXBNE

Portland

ven 15/5

19:45-06:30

1 stop17h 45m

Brisbane

ven 22/5

10:30-10:20

1 stop16h 50m

$1,772

Flights are sorted by cheapest return flights first.

Deals found on 2/4

Showing 1-10 of 60 resultsSorted by cheapest first
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2
3
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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, February is the cheapest month in which you can book a flight from Portland to Australia (average of $730). Flying from Portland to Australia in July is currently the most expensive (average of $1,373). 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 5 aprile 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
9,545 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Food

6.6

Crew

8.1

Overall

7.4

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
9,545 reviews
United Airlines
7.4
Good
9,545 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Food

6.6

Crew

8.1

Overall

7.4

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 30m. 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 $730). Flying from Portland to Australia in July is currently the most expensive (average of $1,373). 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
Boise to Sydney flights
Portland to Perth 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 5 aprile 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$743Average$1,999FlexibilityNo 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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