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

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.

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 October 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.

$755 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.

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

23h 20m1 stop Vancouver Intl

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

22h 21m1 stop Vancouver Intl

$1,397Air Canada

Tue, 16 Feb - Wed, 24 Feb

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

23h 20m1 stop Vancouver Intl

10:20 - 18:30SYD Sydney Kingsford Smith-PDX Portland

26h 10m1 stop Vancouver Intl

$1,397Air Canada

Tue, 23 Feb - Tue, 16 Mar

19:10 - 09:35PDX Portland-SYD Sydney Kingsford Smith

19h 25m1 stop Vancouver Intl

07:30 - 09:25SYD Sydney Kingsford Smith-PDX Portland

19h 55m2 stops Brisbane Vancouver Intl

$1,420Air Canada

Tue, 23 Feb - Tue, 16 Mar

19:10 - 08:20PDX Portland-SYD Sydney Kingsford Smith

19h 10m1 stop Vancouver Intl

06:00 - 09:25SYD Sydney Kingsford Smith-PDX Portland

20h 25m2 stops Brisbane Vancouver Intl

$1,465Multiple Airlines

Thu, 1 Apr - Tue, 6 Apr

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

23h 20m1 stop Vancouver Intl

06:20 - 09:26SYD Sydney Kingsford Smith-PDX Portland

22h 06m2 stops Brisbane Vancouver Intl

$1,465Multiple Airlines

Thu, 12 Nov - Sun, 22 Nov

19:10 - 08:35PDX Portland-SYD Sydney Kingsford Smith

19h 25m1 stop Vancouver Intl

09:20 - 09:25SYD Sydney Kingsford Smith-PDX Portland

17h 05m1 stop Vancouver Intl

$1,474Air New Zealand

Mon, 15 Mar - Sun, 11 Apr

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

29h 00m1 stop Houston George Bush Intcntl

11:50 - 10:18SYD Sydney Kingsford Smith-PDX Portland

17h 28m1 stop San Francisco

$1,605United Airlines

Mon, 2 Nov - Wed, 25 Nov

08:45 - 08:05PDX Portland-SYD Sydney Kingsford Smith

29h 20m2 stops Denver Intl Los Angeles

10:20 - 20:49SYD Sydney Kingsford Smith-PDX Portland

27h 29m2 stops San Francisco Denver Intl

$1,613United Airlines

Sun, 14 Mar - Tue, 6 Apr

17:40 - 10:20PDX Portland-SYD Sydney Kingsford Smith

21h 40m2 stops Los Angeles Brisbane

21:25 - 20:48SYD Sydney Kingsford Smith-PDX Portland

17h 23m1 stop San Francisco

$1,763Qantas Airways

Fri, 12 Mar - Fri, 19 Mar

17:04 - 09:00PDX Portland-SYD Sydney Kingsford Smith

20h 56m1 stop Los Angeles

11:10 - 12:29SYD Sydney Kingsford Smith-PDX Portland

20h 19m1 stop Los Angeles

$1,803Qantas Airways

Sun, 1 Nov - Sat, 14 Nov

Cheap last-minute flights

Enter your travel dates to find the best prices.

17:03 - 09:00PDX Portland-SYD Sydney Kingsford Smith

21h 57m1 stop Los Angeles

11:10 - 16:34SYD Sydney Kingsford Smith-PDX Portland

23h 24m1 stop Los Angeles

$1,741Qantas Airways

Sat, 24 Oct - Sat, 31 Oct

07:30 - 06:55PDX Portland-SYD Sydney Kingsford Smith

29h 25m1 stop Dallas/Fort Worth

11:10 - 16:26SYD Sydney Kingsford Smith-PDX Portland

23h 16m2 stops Los Angeles Phoenix Sky Harbor Intl

$1,750American Airlines

Sat, 24 Oct - Sat, 31 Oct

15:00 - 08:55PDX Portland-SYD Sydney Kingsford Smith

23h 55m2 stops Phoenix Sky Harbor Intl Los Angeles

11:10 - 16:26SYD Sydney Kingsford Smith-PDX Portland

23h 16m2 stops Los Angeles Phoenix Sky Harbor Intl

$1,750American Airlines

Sat, 24 Oct - Sat, 31 Oct

10:48 - 06:25PDX Portland-SYD Sydney Kingsford Smith

25h 37m1 stop Los Angeles

11:15 - 16:34SYD Sydney Kingsford Smith-PDX Portland

23h 19m1 stop Los Angeles

$1,796Alaska Airlines

Sat, 24 Oct - Sat, 31 Oct

12:18 - 06:25PDX Portland-SYD Sydney Kingsford Smith

24h 07m2 stops Seattle/Tacoma Intl Los Angeles

11:15 - 16:50SYD Sydney Kingsford Smith-PDX Portland

23h 35m2 stops Los Angeles Seattle/Tacoma Intl

$1,801Alaska Airlines

Sat, 24 Oct - Sat, 31 Oct

14:30 - 06:25PDX Portland-SYD Sydney Kingsford Smith

21h 55m1 stop Los Angeles

11:15 - 18:55SYD Sydney Kingsford Smith-PDX Portland

25h 40m2 stops Los Angeles Seattle/Tacoma Intl

$1,801Alaska Airlines

Sat, 24 Oct - Sat, 31 Oct

17:03 - 21:15PDX Portland-SYD Sydney Kingsford Smith

34h 12m2 stops Los Angeles Singapore Changi

19:10 - 17:34SYD Sydney Kingsford Smith-PDX Portland

40h 24m3 stops Singapore Changi Tokyo Narita Los Angeles

$7,025Multiple Airlines

Sat, 24 Oct - Sat, 31 Oct

17:03 - 21:15PDX Portland-SYD Sydney Kingsford Smith

34h 12m2 stops Los Angeles Singapore Changi

19:10 - 17:34SYD Sydney Kingsford Smith-PDX Portland

40h 24m3 stops Singapore Changi Tokyo Narita Los Angeles

$7,878Multiple Airlines

Sat, 24 Oct - Sat, 31 Oct

14:25 - 06:55PDX Portland-SYD Sydney Kingsford Smith

46h 30m3 stops Dallas/Fort Worth London Heathrow Singapore Changi

16:20 - 18:48SYD Sydney Kingsford Smith-PDX Portland

44h 28m3 stops Singapore Changi London Heathrow Dallas/Fort Worth

$15,180British Airways

Sat, 24 Oct - Sat, 31 Oct

11:58 - 06:55PDX Portland-SYD Sydney Kingsford Smith

48h 57m3 stops Dallas/Fort Worth London Heathrow Singapore Changi

16:20 - 20:32SYD Sydney Kingsford Smith-PDX Portland

46h 12m3 stops Singapore Changi London Heathrow Dallas/Fort Worth

$15,182British Airways

Sat, 24 Oct - Sat, 31 Oct

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Qantas Airways flights from Portland to Sydney

Our best Qantas Airways deals on Portland to Sydney flight tickets

Qantas Airways

29 Oct

PDX17:18Portland

21h 42m

1 stop

SYD09:00Sydney Kingsford Smith

11 Nov

SYD11:10Sydney Kingsford Smith

21h 40m

1 stop

PDX13:50Portland

$1,670

Qantas Airways

24 Oct

PDX17:03Portland

21h 57m

1 stop

SYD09:00Sydney Kingsford Smith

31 Oct

SYD11:10Sydney Kingsford Smith

23h 24m

1 stop

PDX16:34Portland

$1,741

Qantas Airways

1 Nov

PDX17:04Portland

20h 56m

1 stop

SYD09:00Sydney Kingsford Smith

14 Nov

SYD11:10Sydney Kingsford Smith

20h 19m

1 stop

PDX12:29Portland

$1,803

American Airlines flights from Portland to Sydney

Our best American Airlines deals on Portland to Sydney flight tickets

American Airlines

23 Feb

PDX13:49Portland

24h 11m

2 stops

SYD09:00Sydney Kingsford Smith

16 Mar

SYD13:05Sydney Kingsford Smith

23h 04m

1 stop

PDX18:09Portland

$1,607

American Airlines

29 Oct

PDX15:00Portland

24h 00m

2 stops

SYD09:00Sydney Kingsford Smith

11 Nov

SYD21:25Sydney Kingsford Smith

21h 36m

2 stops

PDX00:01Portland

$1,678

American Airlines

24 Oct

PDX15:00Portland

23h 55m

2 stops

SYD08:55Sydney Kingsford Smith

31 Oct

SYD11:10Sydney Kingsford Smith

23h 16m

2 stops

PDX16:26Portland

$1,750

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Tue 16/2

15:15-09:35

1 stop23h 20m

Sydney Kingsford Smith

Wed 24/2

11:20-14:41

1 stop22h 21m

$1,397

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

10:20-18:30

1 stop26h 10m

$1,397

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Tue 23/2

19:10-09:35

1 stop19h 25m

Sydney Kingsford Smith

Tue 16/3

07:30-09:25

2 stops19h 55m

$1,420

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Thu 1/4

19:10-08:20

1 stop19h 10m

Sydney Kingsford Smith

Tue 6/4

06:00-09:25

2 stops20h 25m

$1,465

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Thu 12/11

15:15-09:35

1 stop23h 20m

Sydney Kingsford Smith

Sun 22/11

06:20-09:26

2 stops22h 06m

$1,465

Fastest return journey

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Mon 15/3

19:10-08:35

1 stop19h 25m

Sydney Kingsford Smith

Sun 11/4

09:20-09:25

1 stop17h 05m

$1,474

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Mon 2/11

07:00-07:00

1 stop29h 00m

Sydney Kingsford Smith

Wed 25/11

11:50-10:18

1 stop17h 28m

$1,605

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Sun 14/3

08:45-08:05

2 stops29h 20m

Sydney Kingsford Smith

Tue 6/4

10:20-20:49

2 stops27h 29m

$1,613

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Fri 12/3

17:40-10:20

2 stops21h 40m

Sydney Kingsford Smith

Fri 19/3

21:25-20:48

1 stop17h 23m

$1,763

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Sun 1/11

17:04-09:00

1 stop20h 56m

Sydney Kingsford Smith

Sat 14/11

11:10-12:29

1 stop20h 19m

$1,803

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 low for flights on this route.

Typical prices usually range from $1,577 to $1,828.
The lowest price recently found on this route was $1,397.

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 $1,530. 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 $1,552.

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 $1,794 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 $1,611 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	$755
Fastest flight time	21h 50m
Direct flights	None

The best one-way flight to Sydney from Portland in the past 72 hours is $755. The best return flight deal from Portland to Sydney found on momondo in the last 72 hours is $1,397.

The fastest flight from Portland to Sydney takes 21h 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 21h 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 October 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 $1,269	Free cancellation	Rating 7.1 11,789 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $1,271	Free cancellation	Rating 7.5 1,114 reviews	Search Qantas Airways flights
United Airlines	PriceFrom $2,407	Free cancellation	Rating 7.3 10,389 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.