Which airlines fly to Sydney?

United Airlines, Air Canada and Qantas Airways 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 62% 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 and Air Canada 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 August 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.

$816 Cheap Flights from Portland to Sydney in 2026

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 - 18:50PDX Portland-SYD Sydney Kingsford Smith

17h 50m1 stop Honolulu

20:45 - 20:50SYD Sydney Kingsford Smith-PDX Portland

17h 05m1 stop Honolulu

$1,516Alaska Airlines

Wed, 9 Sep - Sun, 20 Sep

07:00 - 19:45PDX Portland-SYD Sydney Kingsford Smith

17h 45m1 stop Honolulu

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

27h 20m1 stop Honolulu

$1,531Multiple Airlines

Mon, 16 Nov - Tue, 1 Dec

07:00 - 19:45PDX Portland-SYD Sydney Kingsford Smith

17h 45m1 stop Honolulu

21:40 - 20:49SYD Sydney Kingsford Smith-PDX Portland

18h 09m1 stop Honolulu

$1,539Multiple Airlines

Wed, 4 Nov - Sun, 8 Nov

19:45 - 07:20PDX Portland-SYD Sydney Kingsford Smith

18h 35m1 stop Vancouver Intl

09:20 - 09:31SYD Sydney Kingsford Smith-PDX Portland

17h 11m1 stop Vancouver Intl

$1,552Air Canada

Mon, 14 Sep - Tue, 29 Sep

15:30 - 07:20PDX Portland-SYD Sydney Kingsford Smith

22h 50m1 stop Vancouver Intl

09:20 - 14:46SYD Sydney Kingsford Smith-PDX Portland

22h 26m1 stop Vancouver Intl

$1,563Air Canada

Tue, 8 Sep - Tue, 15 Sep

15:15 - 08:35PDX Portland-SYD Sydney Kingsford Smith

23h 20m1 stop Vancouver Intl

11:20 - 14:41SYD Sydney Kingsford Smith-PDX Portland

22h 21m1 stop Vancouver Intl

$1,563Air Canada

Wed, 28 Oct - Mon, 2 Nov

11:54 - 06:25PDX Portland-SYD Sydney Kingsford Smith

23h 31m1 stop San Francisco

10:25 - 13:50SYD Sydney Kingsford Smith-PDX Portland

22h 25m2 stops Brisbane Los Angeles Los Angeles

$1,630Qantas Airways

Wed, 11 Nov - Thu, 19 Nov

14:46 - 06:25PDX Portland-SYD Sydney Kingsford Smith

20h 39m1 stop San Francisco

21:55 - 13:26SYD Sydney Kingsford Smith-PDX Portland

32h 31m2 stops Brisbane Los Angeles Los Angeles

$1,630Qantas Airways

Fri, 5 Feb - Tue, 4 May

19:26 - 09:20PDX Portland-SYD Sydney Kingsford Smith

18h 54m1 stop San Francisco

11:50 - 18:20SYD Sydney Kingsford Smith-PDX Portland

25h 30m1 stop San Francisco

$1,828United Airlines

Mon, 16 Nov - Wed, 2 Dec

15:40 - 09:20PDX Portland-SYD Sydney Kingsford Smith

22h 40m1 stop San Francisco

09:15 - 12:18SYD Sydney Kingsford Smith-PDX Portland

22h 03m1 stop Houston George Bush Intcntl

$1,828United Airlines

Tue, 17 Nov - Wed, 2 Dec

Cheap last-minute flights

Enter your travel dates to find the best prices.

08:00 - 18:50PDX Portland-SYD Sydney Kingsford Smith

17h 50m1 stop Honolulu

20:45 - 06:14SYD Sydney Kingsford Smith-PDX Portland

26h 29m1 stop Honolulu

$1,524Alaska Airlines

Wed, 26 Aug - Tue, 8 Sep

08:00 - 18:50PDX Portland-SYD Sydney Kingsford Smith

17h 50m1 stop Honolulu

20:45 - 20:50SYD Sydney Kingsford Smith-PDX Portland

17h 05m1 stop Honolulu

$1,595Alaska Airlines

Thu, 27 Aug - Tue, 8 Sep

08:00 - 18:50PDX Portland-SYD Sydney Kingsford Smith

17h 50m1 stop Honolulu

20:45 - 06:14SYD Sydney Kingsford Smith-PDX Portland

26h 29m1 stop Honolulu

$1,595Alaska Airlines

Thu, 27 Aug - Sun, 6 Sep

11:15 - 06:55PDX Portland-SYD Sydney Kingsford Smith

26h 40m1 stop San Francisco

09:30 - 15:03SYD Sydney Kingsford Smith-PDX Portland

22h 33m2 stops Los Angeles Los Angeles Denver Intl

$1,717United Airlines

Sun, 23 Aug - Sun, 6 Sep

13:03 - 06:55PDX Portland-SYD Sydney Kingsford Smith

24h 52m1 stop San Francisco

10:20 - 10:11SYD Sydney Kingsford Smith-PDX Portland

16h 51m1 stop San Francisco

$1,717United Airlines

Sun, 23 Aug - Sun, 6 Sep

19:15 - 06:55PDX Portland-SYD Sydney Kingsford Smith

18h 40m1 stop San Francisco

09:30 - 15:05SYD Sydney Kingsford Smith-PDX Portland

22h 35m2 stops Los Angeles Los Angeles Denver Intl

$1,717United Airlines

Sun, 23 Aug - Wed, 9 Sep

06:35 - 07:05PDX Portland-SYD Sydney Kingsford Smith

31h 30m1 stop Los Angeles Los Angeles

17:50 - 20:50SYD Sydney Kingsford Smith-PDX Portland

20h 00m1 stop Los Angeles Los Angeles

$1,823Qantas Airways

Sun, 23 Aug - Tue, 25 Aug

06:35 - 07:05PDX Portland-SYD Sydney Kingsford Smith

31h 30m1 stop Los Angeles Los Angeles

15:15 - 23:59SYD Sydney Kingsford Smith-PDX Portland

25h 44m2 stops Brisbane Los Angeles Los Angeles

$1,909Qantas Airways

Sun, 23 Aug - Tue, 25 Aug

19:45 - 07:20PDX Portland-SYD Sydney Kingsford Smith

18h 35m1 stop Vancouver Intl

10:00 - 09:31SYD Sydney Kingsford Smith-PDX Portland

40h 31m2 stops Brisbane Vancouver Intl

$1,949Air Canada

Thu, 27 Aug - Mon, 7 Sep

19:45 - 12:40PDX Portland-SYD Sydney Kingsford Smith

23h 55m2 stops Vancouver Intl Brisbane

09:20 - 14:51SYD Sydney Kingsford Smith-PDX Portland

22h 31m1 stop Vancouver Intl

$1,970Air Canada

Mon, 24 Aug - Sun, 6 Sep

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Alaska Airlines flights from Portland to Sydney

Our best Alaska Airlines deals on Portland to Sydney flight tickets

Alaska Airlines

9 Sept

PDX08:00Portland

17h 50m

1 stop

SYD18:50Sydney Kingsford Smith

20 Sept

SYD20:45Sydney Kingsford Smith

17h 05m

1 stop

PDX20:50Portland

$1,516

Alaska Airlines

26 Aug

PDX08:00Portland

17h 50m

1 stop

SYD18:50Sydney Kingsford Smith

8 Sept

SYD20:45Sydney Kingsford Smith

26h 29m

1 stop

PDX06:14Portland

$1,524

Alaska Airlines

6 Oct

PDX10:30Portland

38h 20m

1 stop

SYD18:50Sydney Kingsford Smith

13 Oct

SYD20:45Sydney Kingsford Smith

18h 05m

1 stop

PDX20:50Portland

$1,541

Air Canada flights from Portland to Sydney

Our best Air Canada deals on Portland to Sydney flight tickets

Air Canada

14 Sept

PDX19:45Portland

18h 35m

1 stop

SYD07:20Sydney Kingsford Smith

29 Sept

SYD09:20Sydney Kingsford Smith

17h 11m

1 stop

PDX09:31Portland

$1,552

Air Canada

8 Sept

PDX15:30Portland

22h 50m

1 stop

SYD07:20Sydney Kingsford Smith

15 Sept

SYD09:20Sydney Kingsford Smith

22h 26m

1 stop

PDX14:46Portland

$1,563

Air Canada

8 Sept

PDX15:30Portland

22h 50m

1 stop

SYD07:20Sydney Kingsford Smith

15 Sept

SYD09:20Sydney Kingsford Smith

22h 26m

1 stop

PDX14:46Portland

$1,564

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Wed 9/9

08:00-18:50

1 stop17h 50m

Sydney Kingsford Smith

Sun 20/9

20:45-20:50

1 stop17h 05m

$1,516

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Mon 16/11

07:00-19:45

1 stop17h 45m

Sydney Kingsford Smith

Tue 1/12

21:40-06:00

1 stop27h 20m

$1,531

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Wed 4/11

07:00-19:45

1 stop17h 45m

Sydney Kingsford Smith

Sun 8/11

21:40-20:49

1 stop18h 09m

$1,539

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Mon 14/9

19:45-07:20

1 stop18h 35m

Sydney Kingsford Smith

Tue 29/9

09:20-09:31

1 stop17h 11m

$1,552

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Tue 8/9

15:30-07:20

1 stop22h 50m

Sydney Kingsford Smith

Tue 15/9

09:20-14:46

1 stop22h 26m

$1,563

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Wed 28/10

15:15-08:35

1 stop23h 20m

Sydney Kingsford Smith

Mon 2/11

11:20-14:41

1 stop22h 21m

$1,563

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Wed 11/11

11:54-06:25

1 stop23h 31m

Sydney Kingsford Smith

Thu 19/11

10:25-13:50

2 stops22h 25m

$1,630

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Fri 5/2

14:46-06:25

1 stop20h 39m

Sydney Kingsford Smith

Tue 4/5

21:55-13:26

2 stops32h 31m

$1,630

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Mon 16/11

19:26-09:20

1 stop18h 54m

Sydney Kingsford Smith

Wed 2/12

11:50-18:20

1 stop25h 30m

$1,828

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Tue 17/11

15:40-09:20

1 stop22h 40m

Sydney Kingsford Smith

Wed 2/12

09:15-12:18

1 stop22h 03m

$1,828

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 $1,483 to $1,742.
The lowest price recently found on this route was $1,516.

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 $1,495. 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 $1,560.

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 $1,731 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 $1,204 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	$816
Fastest flight time	17h 50m
Direct flights	None

The best one-way flight to Sydney from Portland in the past 72 hours is $816. The best return flight deal from Portland to Sydney found on momondo in the last 72 hours is $1,516.

The fastest flight from Portland to Sydney takes 17h 50m

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 50m.
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 August 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 Air Canada (19%) and Qantas Airways (19%).

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 $1,240	Free cancellation	Rating 7.1 11,514 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $1,242	Free cancellation	Rating 7.5 1,084 reviews	Search Qantas Airways flights
United Airlines	PriceFrom $2,352	Free cancellation	Rating 7.4 10,109 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.