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Cheap flights from Portland to Sydney from $760

PDX — SYD
26 Nov — 3 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portland to Sydney

Enter your travel dates to find the best prices.

Cheapest flights from Portland to Sydney

Mon 26/1010:05 -
1 stop28h 30m
Sun 8/1106:20 -
2 stops22h 06m
Deal found 25/10$1,405
Sat 14/1115:15 -
1 stop23h 20m
Thu 26/1111:20 -
1 stop17h 06m
Deal found 22/10$1,499
Sat 24/1019:45 -
1 stop18h 50m
Sat 31/1006:20 -
2 stops21h 06m
Deal found 22/10$1,513
Mon 26/1007:05 -
1 stop31h 30m
Sun 8/1111:20 -
1 stop28h 26m
Deal found 25/10$1,523
Sat 14/1119:10 -
1 stop19h 25m
Tue 24/1111:20 -
1 stop22h 21m
Deal found 26/10$1,526
Sat 14/1119:10 -
2 stops31h 05m
Tue 24/1111:20 -
1 stop17h 06m
Deal found 26/10$1,549
Thu 26/1115:15 -
1 stop23h 20m
Thu 10/1219:25 -
2 stops42h 06m
Deal found 22/10$1,573
Sat 21/1119:10 -
2 stops23h 30m
Sat 5/1219:25 -
2 stops44h 21m
Deal found 22/10$1,577

Find flight deals from Portland to Sydney

Round-trip from

$1,392

One-way from

$760

Popular in

December

Cheapest in

September

Average price

$1,724
Air Canada
  • Air Canada
  • 9/2-23/2
  • 2 total stops
  • 36h 31m total
  • Portland to Sydney
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 23/2-31/12
  • 1 total stop
  • 26h 55m total
  • Portland to Sydney
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($379 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 October 2026
Search Deals

Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Portland to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Tue 9/3

13:30-06:25

1 stop21h 55m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$784

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Sun 1/11

15:31-08:30

2 stops21h 59m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$912

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Thu 19/11

07:00-09:35

1 stop31h 35m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$925

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Thu 31/12

10:30-06:25

1 stop24h 55m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$932
Fastest return journey

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Thu 31/12

14:30-06:25

1 stop20h 55m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$1,011

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Thu 10/12

18:30-21:35

2 stops32h 05m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$1,398

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Sat 21/11

19:10-13:40

2 stops23h 30m

Sydney Kingsford Smith

Sat 5/12

19:25-20:46

2 stops44h 21m

$1,577

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Thu 11/3

12:55-06:25

2 stops22h 30m

Sydney Kingsford Smith

Sat 13/3

11:15-14:55

2 stops22h 40m

$1,658

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Sun 6/12

14:31-08:35

2 stops23h 04m

Sydney Kingsford Smith

Sun 13/12

09:55-16:35

2 stops25h 40m

$1,811

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Mon 7/12

05:00-09:20

2 stops33h 20m

Sydney Kingsford Smith

Sun 17/1

09:20-12:14

1 stop21h 54m

$1,892

Flights are sorted by cheapest return flights first.

Deals found on 24/10

Showing 1-10 of 16 resultsSorted by cheapest first
1
2

Best time to book a flight from Portland to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Portland with our price prediction graph.
Estimated return price

Cheapflights Insights

Everything you need to know about your flight from Portland to Sydney

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

The best time to book flights from Portland to Sydney is 74 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Portland to Sydney?

Currently, September is the cheapest month in which you can book a flight from Portland to Sydney (average of $1,523). Flying from Portland to Sydney in December is currently the most expensive (average of $2,612). 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 much does it cost for a return flight from Portland to Sydney?

Airfare is below average for this route at the moment.

Portland to Sydney flights typically cost between $1,644 and $1,957 in February.
The cheapest return price found within the last 5 days was $1,392 on Air Canada (9 Feb–23 Feb).

Reviews of airlines servicing Sydney

Read reviews from past customers who have flown with Qantas Airways,United Airlines, andAir Canada from Portland to Sydney. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Qantas Airways
7.5
Good
1,118 reviews
Check prices

Boarding

7.7

Entertainment

7.2

Crew

8.1

Comfort

7.4

Food

7.0

Overall

7.5

Reviews

1 / 20
4.0
Okay

Robyn,Aug 2026

LAX - SYD

I was flabbergasted when the crew completely missed me in the distribution of food and drinks in Business Class - even after they looked twice at my opened table. However - this has happened to me on my last longhaul QF flight and with the same hosty (older woman with curly bob). She obviously cannot handly the stress of initial boarding as both times she has come back to me with an apology. When compared to our usual Business/ First longhauls with Qatar or Emirates, Qantas leave ALOT to be desired. I would highly recommend going with another airline. BTW I'm a 4th gen Aussie and previous Qantas employee - I would love to love them if they provided service but they just dont.
Qantas Airways
7.5
Good
1,118 reviews
Qantas Airways
7.5
Good
1,118 reviews
Check prices

Boarding

7.7

Entertainment

7.2

Crew

8.1

Comfort

7.4

Food

7.0

Overall

7.5

Reviews

1 / 20
4.0
Okay

Robyn,Aug 2026

LAX - SYD

I was flabbergasted when the crew completely missed me in the distribution of food and drinks in Business Class - even after they looked twice at my opened table. However - this has happened to me on my last longhaul QF flight and with the same hosty (older woman with curly bob). She obviously cannot handly the stress of initial boarding as both times she has come back to me with an apology. When compared to our usual Business/ First longhauls with Qatar or Emirates, Qantas leave ALOT to be desired. I would highly recommend going with another airline. BTW I'm a 4th gen Aussie and previous Qantas employee - I would love to love them if they provided service but they just dont.
United Airlines
7.3
Good
10,440 reviews
Qantas Airways
7.5
Good
1,118 reviews
Check prices

Boarding

7.7

Entertainment

7.2

Crew

8.1

Comfort

7.4

Food

7.0

Overall

7.5

Reviews

1 / 20
4.0
Okay

Robyn,Aug 2026

LAX - SYD

I was flabbergasted when the crew completely missed me in the distribution of food and drinks in Business Class - even after they looked twice at my opened table. However - this has happened to me on my last longhaul QF flight and with the same hosty (older woman with curly bob). She obviously cannot handly the stress of initial boarding as both times she has come back to me with an apology. When compared to our usual Business/ First longhauls with Qatar or Emirates, Qantas leave ALOT to be desired. I would highly recommend going with another airline. BTW I'm a 4th gen Aussie and previous Qantas employee - I would love to love them if they provided service but they just dont.
Air Canada
7.1
Good
11,816 reviews
Qantas Airways
7.5
Good
1,118 reviews
Check prices

Boarding

7.7

Entertainment

7.2

Crew

8.1

Comfort

7.4

Food

7.0

Overall

7.5

Reviews

1 / 20
4.0
Okay

Robyn,Aug 2026

LAX - SYD

I was flabbergasted when the crew completely missed me in the distribution of food and drinks in Business Class - even after they looked twice at my opened table. However - this has happened to me on my last longhaul QF flight and with the same hosty (older woman with curly bob). She obviously cannot handly the stress of initial boarding as both times she has come back to me with an apology. When compared to our usual Business/ First longhauls with Qatar or Emirates, Qantas leave ALOT to be desired. I would highly recommend going with another airline. BTW I'm a 4th gen Aussie and previous Qantas employee - I would love to love them if they provided service but they just dont.

Related info for your journey

  • How long is the flight from Portland to Sydney?

    Airlines like Air Canada and Alaska Airlines fly from Portland to Sydney in about 22h 30m. The time it takes to get you to your destination can typically vary by up to 1h. The distance from Portland to Sydney is about 12350 km. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines flying from Portland to Sydney round-trip?

    Cheapflights users have booked flights from Portland to Sydney round-trip from $1,263. Other airlines that can offer you cheap pricing are Qantas Airways, from $1,265, and United Airlines, from $2,397. You may be able to fly from Portland to Sydney for 29% less than the average price by searching for these airlines.

  • Can I find deals for flights from Portland to Sydney that include hotel bookings?

    Yes. In addition to deals on Portland to Sydney flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Portland to Sydney?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Sydney.

  • Can I find deals for business class flights from Portland to Sydney?

    Yes. Cheapflights offers flight deals from Portland to Sydney 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 Sydney?

    Currently, September is the cheapest month in which you can book a flight from Portland to Sydney (average of $1,523). Flying from Portland to Sydney in December is currently the most expensive (average of $2,612). 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

Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Penrith
Manly
Cronulla
Lithgow
Terrigal
Katoomba
Randwick
Leura
Bondi Beach
Coogee

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Portland to Sydney

Eugene to Sydney flights
Boise to Sydney flights
Portland to Coolangatta flights

Top 3 airlines flying from Portland to Sydney

AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$1,263Average$1,263FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Qantas AirwaysCheapest$1,265Average$3,061FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
United AirlinesCheapest$2,397Average$2,619FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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

Deals for Portland to Sydney flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Portland to Sydney.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Portland to Sydney flexibly with Cheapflights today.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Sydney from Portland today and book when prices fit your budget.

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