Which airlines fly to Sydney?

United Airlines, Qantas Airways and Air Canada are the top three most popular airlines that fly to Sydney from Portland according to our data. United Airlines is the first choice among our users, with 63% of people opting to fly with this airline when travelling to Sydney. Keep in mind that there are 3 different airlines that fly to Sydney on a routine basis, so you have a few additional options to choose from.

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

Alaska Airlines is the most popular carrier 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 September 2026, there are 3 operators 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.

$787 Cheap Flights from Portland to Sydney in 2026/27

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.

10:30 - 19:45PDX Portland-SYD Sydney Kingsford Smith

38h 15m1 stop Honolulu

21:40 - 06:04SYD Sydney Kingsford Smith-PDX Portland

27h 24m1 stop Honolulu

$1,514Multiple Airlines

Tue, 17 Nov - Tue, 24 Nov

15:15 - 09:35PDX Portland-SYD Sydney Kingsford Smith

23h 20m1 stop Vancouver Intl

10:20 - 14:40SYD Sydney Kingsford Smith-PDX Portland

22h 20m1 stop Vancouver Intl

$1,516Air Canada

Tue, 23 Feb - Tue, 16 Mar

15:30 - 08:20PDX Portland-SYD Sydney Kingsford Smith

22h 50m1 stop Vancouver Intl

11:20 - 19:31SYD Sydney Kingsford Smith-PDX Portland

26h 11m1 stop Vancouver Intl

$1,516Air Canada

Sun, 18 Oct - Sun, 1 Nov

10:00 - 09:35PDX Portland-SYD Sydney Kingsford Smith

28h 35m1 stop Vancouver Intl

11:20 - 09:26SYD Sydney Kingsford Smith-PDX Portland

17h 06m1 stop Vancouver Intl

$1,516Air Canada

Sun, 14 Feb - Sun, 28 Feb

17:50 - 19:45PDX Portland-SYD Sydney Kingsford Smith

30h 55m1 stop Honolulu

21:40 - 06:00SYD Sydney Kingsford Smith-PDX Portland

26h 20m1 stop Honolulu

$1,521Alaska Airlines

Tue, 23 Feb - Tue, 16 Mar

17:50 - 19:45PDX Portland-SYD Sydney Kingsford Smith

30h 55m1 stop Honolulu

21:40 - 20:50SYD Sydney Kingsford Smith-PDX Portland

18h 10m1 stop Honolulu

$1,521Alaska Airlines

Sun, 14 Feb - Sun, 28 Feb

19:49 - 09:20PDX Portland-SYD Sydney Kingsford Smith

18h 31m1 stop San Francisco

09:20 - 12:17SYD Sydney Kingsford Smith-PDX Portland

21h 57m1 stop Houston George Bush Intcntl

$1,837United Airlines

Mon, 8 Feb - Mon, 15 Feb

15:30 - 09:20PDX Portland-SYD Sydney Kingsford Smith

22h 50m1 stop San Francisco

11:50 - 18:31SYD Sydney Kingsford Smith-PDX Portland

25h 41m1 stop San Francisco

$1,837United Airlines

Mon, 18 Jan - Mon, 22 Feb

17:06 - 06:25PDX Portland-SYD Sydney Kingsford Smith

18h 19m1 stop San Francisco

11:05 - 13:26SYD Sydney Kingsford Smith-PDX Portland

21h 21m2 stops Brisbane Los Angeles

$1,882Qantas Airways

Wed, 3 Feb - Sat, 13 Feb

14:34 - 06:25PDX Portland-SYD Sydney Kingsford Smith

20h 51m1 stop Los Angeles

11:05 - 13:26SYD Sydney Kingsford Smith-PDX Portland

21h 21m2 stops Brisbane Los Angeles

$1,910Qantas Airways

Sat, 6 Feb - Sat, 13 Feb

Cheap last-minute flights

Enter your travel dates to find the best prices.

17:55 - 07:05PDX Portland-SYD Sydney Kingsford Smith

20h 10m1 stop Los Angeles

21:50 - 23:16SYD Sydney Kingsford Smith-PDX Portland

43h 26m2 stops Brisbane Los Angeles

$2,094Multiple Airlines

Sun, 27 Sep - Sun, 4 Oct

10:33 - 07:05PDX Portland-SYD Sydney Kingsford Smith

27h 32m1 stop Los Angeles

17:50 - 22:06SYD Sydney Kingsford Smith-PDX Portland

21h 16m1 stop Los Angeles

$2,109Qantas Airways

Thu, 24 Sep - Sat, 26 Sep

13:53 - 07:05PDX Portland-SYD Sydney Kingsford Smith

24h 12m1 stop Los Angeles

10:10 - 10:44SYD Sydney Kingsford Smith-PDX Portland

18h 34m1 stop Los Angeles

$2,120Multiple Airlines

Sun, 27 Sep - Sun, 4 Oct

15:00 - 07:05PDX Portland-SYD Sydney Kingsford Smith

23h 05m2 stops Phoenix Sky Harbor Intl Los Angeles

18:50 - 23:12SYD Sydney Kingsford Smith-PDX Portland

22h 22m2 stops Los Angeles Phoenix Sky Harbor Intl

$2,130American Airlines

Sun, 27 Sep - Sun, 4 Oct

10:33 - 07:30PDX Portland-SYD Sydney Kingsford Smith

27h 57m1 stop Los Angeles

17:50 - 23:55SYD Sydney Kingsford Smith-PDX Portland

23h 05m2 stops Los Angeles Seattle/Tacoma Intl

$2,624Alaska Airlines

Thu, 24 Sep - Sat, 26 Sep

15:33 - 20:10PDX Portland-SYD Sydney Kingsford Smith

35h 37m2 stops Los Angeles Hong Kong Intl

07:50 - 16:34SYD Sydney Kingsford Smith-PDX Portland

26h 44m3 stops Auckland Intl Papeete Faaa Los Angeles

$2,677Multiple Airlines

Sun, 27 Sep - Sun, 4 Oct

12:01 - 07:05PDX Portland-SYD Sydney Kingsford Smith

26h 04m2 stops Dallas/Fort Worth Los Angeles

10:10 - 17:03SYD Sydney Kingsford Smith-PDX Portland

24h 53m2 stops Los Angeles Dallas/Fort Worth

$4,159Qantas Airways

Tue, 22 Sep - Mon, 12 Oct

11:48 - 07:05PDX Portland-SYD Sydney Kingsford Smith

26h 17m2 stops Chicago O'Hare Intl Los Angeles

10:10 - 22:49SYD Sydney Kingsford Smith-PDX Portland

30h 39m1 stop Los Angeles

$4,182Qantas Airways

Tue, 22 Sep - Mon, 12 Oct

06:30 - 07:05PDX Portland-SYD Sydney Kingsford Smith

31h 35m1 stop Los Angeles

10:10 - 22:49SYD Sydney Kingsford Smith-PDX Portland

30h 39m1 stop Los Angeles

$4,197Qantas Airways

Tue, 22 Sep - Mon, 12 Oct

12:45 - 07:00PDX Portland-SYD Sydney Kingsford Smith

25h 15m2 stops Denver Intl Los Angeles

10:30 - 18:31SYD Sydney Kingsford Smith-PDX Portland

26h 01m3 stops Los Angeles Denver Intl San Francisco

$5,518United Airlines

Tue, 22 Sep - Mon, 12 Oct

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Air Canada flights from Portland to Sydney

Our best Air Canada deals on Portland to Sydney flight tickets

Air Canada

18 Oct

PDX15:30Portland

22h 50m

1 stop

SYD08:20Sydney Kingsford Smith

1 Nov

SYD11:20Sydney Kingsford Smith

26h 11m

1 stop

PDX19:31Portland

$1,516

Air Canada

2 Nov

PDX15:20Portland

23h 15m

1 stop

SYD09:35Sydney Kingsford Smith

9 Nov

SYD11:20Sydney Kingsford Smith

17h 06m

1 stop

PDX09:26Portland

$1,537

Air Canada

23 Feb

PDX19:10Portland

19h 25m

1 stop

SYD09:35Sydney Kingsford Smith

16 Mar

SYD07:30Sydney Kingsford Smith

19h 55m

2 stops

PDX09:25Portland

$1,538

Alaska Airlines flights from Portland to Sydney

Our best Alaska Airlines deals on Portland to Sydney flight tickets

Alaska Airlines

23 Feb

PDX17:50Portland

30h 55m

1 stop

SYD19:45Sydney Kingsford Smith

16 Mar

SYD21:40Sydney Kingsford Smith

26h 20m

1 stop

PDX06:00Portland

$1,521

Alaska Airlines

24 Sept

PDX10:33Portland

27h 57m

1 stop

SYD07:30Sydney Kingsford Smith

26 Sept

SYD17:50Sydney Kingsford Smith

23h 05m

2 stops

PDX23:55Portland

$2,624

Alaska Airlines

30 Sept

PDX08:00Portland

17h 50m

1 stop

SYD18:50Sydney Kingsford Smith

9 Oct

SYD20:45Sydney Kingsford Smith

18h 05m

1 stop

PDX20:50Portland

$9,211

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Tue 17/11

10:30-19:45

1 stop38h 15m

Sydney Kingsford Smith

Tue 24/11

21:40-06:04

1 stop27h 24m

$1,514

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Tue 23/2

15:15-09:35

1 stop23h 20m

Sydney Kingsford Smith

Tue 16/3

10:20-14:40

1 stop22h 20m

$1,516

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Sun 18/10

15:30-08:20

1 stop22h 50m

Sydney Kingsford Smith

Sun 1/11

11:20-19:31

1 stop26h 11m

$1,516

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Sun 14/2

10:00-09:35

1 stop28h 35m

Sydney Kingsford Smith

Sun 28/2

11:20-09:26

1 stop17h 06m

$1,516

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Tue 23/2

17:50-19:45

1 stop30h 55m

Sydney Kingsford Smith

Tue 16/3

21:40-06:00

1 stop26h 20m

$1,521

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Sun 14/2

17:50-19:45

1 stop30h 55m

Sydney Kingsford Smith

Sun 28/2

21:40-20:50

1 stop18h 10m

$1,521

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Mon 8/2

19:49-09:20

1 stop18h 31m

Sydney Kingsford Smith

Mon 15/2

09:20-12:17

1 stop21h 57m

$1,837

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Mon 18/1

15:30-09:20

1 stop22h 50m

Sydney Kingsford Smith

Mon 22/2

11:50-18:31

1 stop25h 41m

$1,837

Fastest return journey

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Wed 3/2

17:06-06:25

1 stop18h 19m

Sydney Kingsford Smith

Sat 13/2

11:05-13:26

2 stops21h 21m

$1,882

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Sat 6/2

14:34-06:25

1 stop20h 51m

Sydney Kingsford Smith

Sat 13/2

11:05-13:26

2 stops21h 21m

$1,910

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?

Prices are currently typical for flights on this route.

Typical prices usually range from $1,459 to $1,801.
The lowest price recently found on this route was $1,514.

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 $1,501. 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 $1,567.

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 $1,751 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 $1,443 on momondo.

How have Portland to Sydney flight prices changed over time?

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

Best price found	$787
Fastest flight time	17h 45m
Direct flights	None

The best one-way flight to Sydney from Portland in the past 72 hours is $787. The best return flight deal from Portland to Sydney found on momondo in the last 72 hours is $1,514.

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.

Search flight deals

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 September 2026, there are 3 operators 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 (62% of total bookings). The next most popular airlines are Qantas Airways (19%) and Air Canada (18%).

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
Air Canada	PriceFrom $1,245	Free cancellation	Rating 7.1 11,658 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $1,247	Free cancellation	Rating 7.5 1,102 reviews	Search Qantas Airways flights
United Airlines	PriceFrom $2,363	Free cancellation	Rating 7.4 10,220 reviews	Search United Airlines flights

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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.