What is the cheapest airline that flies from Portland to Sydney Kingsford Smith?

Alaska Airlines, Air Canada, and ANA are the most popular carriers operating from Portland to Sydney Kingsford Smith

When did momondo last update prices for flights from Portland Airport to Sydney Kingsford Smith Airport?

Prices for flights from Portland Airport to Sydney Kingsford Smith Airport are updated daily.

How many operators does momondo search for flights from Portland Airport to Sydney Kingsford Smith Airport?

As of June 2026, there is 1 operator available to choose from for flights from Portland Airport to Sydney Kingsford Smith Airport.

How old do you have to be to fly from Portland Airport to Sydney Kingsford Smith Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Portland Airport to Sydney Kingsford Smith Airport.

What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?

The travel and health documents you'll need for your trip to Sydney Kingsford Smith Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at Sydney Kingsford Smith Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$814 Cheap Flights from Portland to Sydney in 2026

Q: What is the typical price of a round-trip flight between Portland and Sydney?

Prices are currently typical for flights on this route. Typical prices usually range from $1,525 to $1,879. The lowest price recently found on this route was $1,543.

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Portland to Sydney

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

08:00 - 18:50

PDX

SYD

17h 50m

1 stop

20:45 - 20:46

SYD

PDX

17h 01m

1 stop

$1,543Alaska Airlines

Mon, 31 Aug - Sun, 13 Sep

08:00 - 18:50

PDX

SYD

17h 50m

1 stop

20:45 - 20:46

SYD

PDX

17h 01m

1 stop

$1,563Alaska Airlines

Mon, 31 Aug - Sun, 13 Sep

17:50 - 19:45

PDX

SYD

30h 55m

1 stop

21:40 - 06:05

SYD

PDX

27h 25m

1 stop

$1,582Multiple Airlines

Sun, 1 Nov - Sun, 15 Nov

10:30 - 18:50

PDX

SYD

39h 20m

1 stop

20:45 - 06:11

SYD

PDX

26h 26m

1 stop

$1,588Alaska Airlines

Tue, 4 Aug - Tue, 11 Aug

07:00 - 19:45

PDX

SYD

17h 45m

1 stop

21:40 - 20:49

SYD

PDX

18h 09m

1 stop

$1,592Multiple Airlines

Mon, 2 Nov - Tue, 10 Nov

07:46 - 18:50

PDX

SYD

18h 04m

1 stop

20:45 - 20:50

SYD

PDX

17h 05m

1 stop

$1,593Alaska Airlines

Wed, 29 Jul - Tue, 11 Aug

10:30 - 18:50

PDX

SYD

39h 20m

1 stop

20:45 - 20:46

SYD

PDX

17h 01m

1 stop

$1,598Alaska Airlines

Tue, 8 Sep - Sun, 13 Sep

07:46 - 18:50

PDX

SYD

18h 04m

1 stop

20:45 - 06:11

SYD

PDX

26h 26m

1 stop

$1,610Alaska Airlines

Fri, 3 Jul - Sun, 19 Jul

17:32 - 18:50

PDX

SYD

32h 18m

1 stop

20:45 - 20:50

SYD

PDX

17h 05m

1 stop

$1,618Alaska Airlines

Sun, 26 Jul - Tue, 11 Aug

08:00 - 18:50

PDX

SYD

17h 50m

1 stop

20:45 - 20:46

SYD

PDX

17h 01m

1 stop

$1,623Alaska Airlines

Fri, 4 Sep - Sun, 13 Sep

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Qantas Airways flights from Portland to Sydney

Our best Qantas Airways deals on Portland to Sydney flight tickets

Qantas Airways

6 Oct

PDX14:49Portland

21h 36m

1 stop

SYD06:25Sydney Kingsford Smith

19 Oct

SYD10:20Sydney Kingsford Smith

30h 38m

2 stops

PDX22:58Portland

$1,673

Qantas Airways

22 Sept

PDX18:50Portland

18h 35m

1 stop

SYD06:25Sydney Kingsford Smith

15 Oct

SYD17:10Sydney Kingsford Smith

23h 48m

2 stops

PDX22:58Portland

$1,685

Qantas Airways

6 Oct

PDX14:49Portland

21h 36m

1 stop

SYD06:25Sydney Kingsford Smith

19 Oct

SYD17:10Sydney Kingsford Smith

23h 48m

2 stops

PDX22:58Portland

$1,686

Alaska Airlines flights from Portland to Sydney

Our best Alaska Airlines deals on Portland to Sydney flight tickets

Alaska Airlines

29 June

PDX07:46Portland

18h 04m

1 stop

SYD18:50Sydney Kingsford Smith

12 July

SYD20:45Sydney Kingsford Smith

17h 05m

1 stop

PDX20:50Portland

$1,503

Alaska Airlines

31 Aug

PDX08:00Portland

17h 50m

1 stop

SYD18:50Sydney Kingsford Smith

13 Sept

SYD20:45Sydney Kingsford Smith

17h 01m

1 stop

PDX20:46Portland

$1,543

Alaska Airlines

31 Aug

PDX08:00Portland

17h 50m

1 stop

SYD18:50Sydney Kingsford Smith

13 Sept

SYD20:45Sydney Kingsford Smith

17h 01m

1 stop

PDX20:46Portland

$1,563

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 31/8

08:00-18:50

1 stop17h 50m

Sydney Kingsford Smith

Sun 13/9

20:45-20:46

1 stop17h 01m

$1,543

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 31/8

08:00-18:50

1 stop17h 50m

Sydney Kingsford Smith

Sun 13/9

20:45-20:46

1 stop17h 01m

$1,563

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sun 1/11

17:50-19:45

1 stop30h 55m

Sydney Kingsford Smith

Sun 15/11

21:40-06:05

1 stop27h 25m

$1,582

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 4/8

10:30-18:50

1 stop39h 20m

Sydney Kingsford Smith

Tue 11/8

20:45-06:11

1 stop26h 26m

$1,588

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 2/11

07:00-19:45

1 stop17h 45m

Sydney Kingsford Smith

Tue 10/11

21:40-20:49

1 stop18h 09m

$1,592

PortlandSydney

PDX - SYD

PDXSYD

Portland

Wed 29/7

07:46-18:50

1 stop18h 04m

Sydney Kingsford Smith

Tue 11/8

20:45-20:50

1 stop17h 05m

$1,593

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 8/9

10:30-18:50

1 stop39h 20m

Sydney Kingsford Smith

Sun 13/9

20:45-20:46

1 stop17h 01m

$1,598

PortlandSydney

PDX - SYD

PDXSYD

Portland

Fri 3/7

07:46-18:50

1 stop18h 04m

Sydney Kingsford Smith

Sun 19/7

20:45-06:11

1 stop26h 26m

$1,610

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sun 26/7

17:32-18:50

1 stop32h 18m

Sydney Kingsford Smith

Tue 11/8

20:45-20:50

1 stop17h 05m

$1,618

PortlandSydney

PDX - SYD

PDXSYD

Portland

Fri 4/9

08:00-18:50

1 stop17h 50m

Sydney Kingsford Smith

Sun 13/9

20:45-20:46

1 stop17h 01m

$1,623

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Portland to Sydney

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the typical price of a round-trip flight between Portland and Sydney?

What is the cheapest month to fly to Sydney?

The month of September is, on average, the cheapest month to fly to Sydney from Portland, with most prices found around $1,401. If you aren’t able to travel to Sydney during the month of September, then flying in June is also cheap. Prices for this month can be found on momondo for an average of $1,595.

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

You are more likely to see cheaper flights to Sydney from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $1,721 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Portland for as low as $1,498 on momondo.

Can stopping save me money on Portland to Sydney flights?

You could potentially save up to 11% on your flight if you consider stops on a Portland to Sydney flight.

How have Portland to Sydney flight prices changed over time?

As of June 2026, prices for Portland to Sydney flights are approximately 27% cheaper when compared to flights at the same time last year.

When to book flights from Portland to Sydney

Are you open to changing your travel dates? Check out the ideal times to fly from Portland to Sydney according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap Portland to Sydney (PDX to SYD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland to Sydney

Fastest flight time	17h 45m
Direct flights	None

The fastest flight from Portland to Sydney takes 17h 45m

There are no direct flights from Portland to Sydney. There are no popular flight routes from Portland to Sydney.

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Frequently asked questions about flying from Portland to Sydney

How far is Portland to Sydney Kingsford Smith by plane?
There are 12333.8 km between Portland and Sydney Kingsford Smith. By plane, this route typically takes 17h 45m.
When did momondo last update prices for flights from Portland Airport to Sydney Kingsford Smith Airport?
Prices for flights from Portland Airport to Sydney Kingsford Smith Airport are updated daily.
How many operators does momondo search for flights from Portland Airport to Sydney Kingsford Smith Airport?
As of June 2026, there is 1 operator available to choose from for flights from Portland Airport to Sydney Kingsford Smith Airport.
How old do you have to be to fly from Portland Airport to Sydney Kingsford Smith Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Portland Airport to Sydney Kingsford Smith Airport.
What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?
The travel and health documents you'll need for your trip to Sydney Kingsford Smith Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at Sydney Kingsford Smith Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Portland to Sydney?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Portland to Sydney is United Airlines (100% of total bookings).

Best airlines flying from Portland to Sydney

Compare and see reviews for airlines that fly from Portland to Sydney with momondo

Airline	Rating	Free cancellation	Price
United Airlines	PriceFrom $1,369	Free cancellation	Rating 7.4 9,875 reviews		Search United Airlines flights

Parramatta

Wollongong

Terrigal

Penrith

Katoomba

Manly

Coogee

Leura

Lithgow

Bondi Beach

Cronulla

Randwick

Charlestown

Newport

Swansea

Why use momondo?

Why should I use momondo to find a flight deal from Portland to Sydney?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Portland to Sydney . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Portland to Sydney with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Sydney from Portland with this policy.

How can momondo help me find flights from Portland to Sydney?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Sydney from Portland.

I’m not ready to book a flight from Portland to Sydney right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Portland to Sydney flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.