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

Qantas Airways, Delta, and United Airlines 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 September 2025, 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.

$800 Cheap Flights from Portland to Sydney in 2025/26

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 $1,369 to $1,738. The lowest price recently found on this route was $1,486.

1 adult

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Find the cheapest flights from Portland to Sydney

Round-trip

One-way

Last minute

Cheap return flights

14:45 - 19:45PDX-SYD

34h 00m2 stops

21:40 - 00:03SYD-PDX

21h 23m2 stops

$1,486Hawaiian Airlines

Find Deal

Tue, 10 Feb - Sat, 28 Feb

16:00 - 19:45PDX-SYD

32h 45m2 stops

21:40 - 00:03SYD-PDX

21h 23m2 stops

$1,499Hawaiian Airlines

Find Deal

Tue, 10 Feb - Sat, 28 Feb

17:10 - 06:35PDX-SYD

20h 25m2 stops

09:25 - 14:52SYD-PDX

22h 27m2 stops

$1,549Delta

Find Deal

Thu, 25 Sep - Wed, 1 Oct

17:35 - 07:05PDX-SYD

20h 30m1 stop

17:45 - 21:16SYD-PDX

20h 31m1 stop

$1,552Qantas Airways

Find Deal

Fri, 26 Sep - Fri, 3 Oct

23:55 - 06:55PDX-SYD

38h 00m2 stops

09:30 - 17:21SYD-PDX

24h 51m2 stops

$1,564United Airlines

Find Deal

Sat, 27 Sep - Sat, 4 Oct

19:00 - 09:35PDX-SYD

19h 35m1 stop

11:20 - 14:45SYD-PDX

22h 25m1 stop

$1,595Air Canada

Find Deal

Mon, 3 Nov - Sat, 15 Nov

17:01 - 06:35PDX-SYD

20h 34m1 stop

09:25 - 11:45SYD-PDX

19h 20m1 stop

$1,624Delta

Find Deal

Thu, 25 Sep - Thu, 2 Oct

19:40 - 12:40PDX-SYD

23h 00m2 stops

10:20 - 18:30SYD-PDX

26h 10m1 stop

$1,625Air Canada

Find Deal

Mon, 20 Oct - Fri, 31 Oct

15:43 - 10:55PDX-SYD

24h 12m2 stops

21:25 - 20:38SYD-PDX

17h 13m1 stop

$1,630Qantas Airways

Find Deal

Thu, 26 Feb - Tue, 10 Mar

06:00 - 09:05PDX-SYD

32h 05m2 stops

11:50 - 18:41SYD-PDX

25h 51m2 stops

$1,723United Airlines

Find Deal

Sun, 7 Dec - Wed, 17 Dec

Qantas Airways flights from Portland to Sydney

Our best Qantas Airways deals on Portland to Sydney flight tickets

Qantas Airways

23 Sept

PDX14:50Portland

23h 15m

1 stop

SYD07:05Sydney Kingsford Smith

30 Sept

SYD09:10Sydney Kingsford Smith

21h 14m

1 stop

PDX13:24Portland

$1,409

Find similar

Qantas Airways

23 Sept

PDX17:35Portland

20h 30m

1 stop

SYD07:05Sydney Kingsford Smith

30 Sept

SYD09:10Sydney Kingsford Smith

21h 14m

1 stop

PDX13:24Portland

$1,460

Find similar

Qantas Airways

26 Sept

PDX17:35Portland

20h 30m

1 stop

SYD07:05Sydney Kingsford Smith

3 Oct

SYD17:45Sydney Kingsford Smith

20h 31m

1 stop

PDX21:16Portland

$1,552

Find similar

Alaska Airlines flights from Portland to Sydney

Our best Alaska Airlines deals on Portland to Sydney flight tickets

Alaska Airlines

24 Feb

PDX21:30Portland

27h 15m

2 stops

SYD19:45Sydney Kingsford Smith

7 Mar

SYD21:40Sydney Kingsford Smith

26h 38m

1 stop

PDX05:18Portland

$1,621

Find similar

Alaska Airlines

26 Sept

PDX07:40Portland

19h 05m

1 stop

SYD19:45Sydney Kingsford Smith

3 Oct

SYD21:40Sydney Kingsford Smith

35h 53m

1 stop

PDX16:33Portland

$1,636

Find similar

Alaska Airlines

28 Feb

PDX07:10Portland

17h 35m

1 stop

SYD19:45Sydney Kingsford Smith

3 Mar

SYD21:40Sydney Kingsford Smith

19h 10m

1 stop

PDX21:50Portland

$1,699

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 10/2

14:45-19:45

2 stops34h 00m

Sydney Kingsford Smith

Sat 28/2

21:40-00:03

2 stops21h 23m

$1,486

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 10/2

16:00-19:45

2 stops32h 45m

Sydney Kingsford Smith

Sat 28/2

21:40-00:03

2 stops21h 23m

$1,499

PortlandSydney

PDX - SYD

PDXSYD

Portland

Thu 25/9

17:10-06:35

2 stops20h 25m

Sydney Kingsford Smith

Wed 1/10

09:25-14:52

2 stops22h 27m

$1,549

PortlandSydney

PDX - SYD

PDXSYD

Portland

Fri 26/9

17:35-07:05

1 stop20h 30m

Sydney Kingsford Smith

Fri 3/10

17:45-21:16

1 stop20h 31m

$1,552

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sat 27/9

23:55-06:55

2 stops38h 00m

Sydney Kingsford Smith

Sat 4/10

09:30-17:21

2 stops24h 51m

$1,564

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 3/11

19:00-09:35

1 stop19h 35m

Sydney Kingsford Smith

Sat 15/11

11:20-14:45

1 stop22h 25m

$1,595

PortlandSydney

PDX - SYD

PDXSYD

Portland

Thu 25/9

17:01-06:35

1 stop20h 34m

Sydney Kingsford Smith

Thu 2/10

09:25-11:45

1 stop19h 20m

$1,624

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 20/10

19:40-12:40

2 stops23h 00m

Sydney Kingsford Smith

Fri 31/10

10:20-18:30

1 stop26h 10m

$1,625

PortlandSydney

PDX - SYD

PDXSYD

Portland

Thu 26/2

15:43-10:55

2 stops24h 12m

Sydney Kingsford Smith

Tue 10/3

21:25-20:38

1 stop17h 13m

$1,630

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sun 7/12

06:00-09:05

2 stops32h 05m

Sydney Kingsford Smith

Wed 17/12

11:50-18:41

2 stops25h 51m

$1,723

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 $1,499. If you aren’t able to travel to Sydney during the month of September, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $1,504.

What is the cheapest day to depart on your flight to Sydney?

Our data shows that Wednesday is the least expensive day to fly to Sydney. Tickets to fly out on this day can be as low as $1,214. The most expensive day to fly to Sydney is Sunday, with ticket prices averaging around $1,972.

What is the cheapest time of day to depart on your flight to Sydney?

According to our data, the cheapest time of day to fly to Sydney is in the morning. momondo users have found flights departing from Portland to Sydney in the morning for as low as $1,363. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,768 on average. Flights to Sydney from Portland in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

How far in advance should I book a flight 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 $1,685 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 $1,469 on momondo.

Can stopping save me money on Portland to Sydney flights?

You could potentially save up to 16% 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 September 2025, prices for Portland to Sydney flights are approximately 25% 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

Direct flights	None

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

Search flight deals

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 35m.
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 2025, 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 $1,247	Free cancellation	Rating 7.4 8,929 reviews		Search United Airlines flights

Parramatta

Wollongong

Terrigal

Penrith

Katoomba

Lithgow

Leura

Manly

Bondi Beach

Coogee

Randwick

Cronulla

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.

An easier way to manage your Sydney trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

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Cheap flights from Portland to Sydney from $809

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to Sydney departing on 23/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

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Cheap return flights

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Qantas Airways flights from Portland to Sydney

Our best Qantas Airways deals on Portland to Sydney flight tickets

Alaska Airlines flights from Portland to Sydney

Our best Alaska Airlines deals on Portland to Sydney flight tickets

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

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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

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

What is the cheapest month to fly to Sydney?

What is the cheapest day to depart on your flight to Sydney?

Our data shows that Wednesday is the least expensive day to fly to Sydney. Tickets to fly out on this day can be as low as $1,214. The most expensive day to fly to Sydney is Sunday, with ticket prices averaging around $1,972.

What is the cheapest time of day to depart on your flight to Sydney?

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

Can stopping save me money on Portland to Sydney flights?

You could potentially save up to 16% 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 September 2025, prices for Portland to Sydney flights are approximately 25% cheaper when compared to flights at the same time last year.

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

Qantas Airways, Delta, and United Airlines are the most popular carriers operating from Portland to Sydney Kingsford Smith

When to book flights from Portland to Sydney

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

Direct flights

How far is Portland to Sydney Kingsford Smith by plane?

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

How many operators does momondo search 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?

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

What is the most popular airline from Portland to Sydney?

Best airlines flying from Portland to Sydney

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

Travelling to a place near Sydney?

Why use momondo?

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

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

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

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

An easier way to manage your Sydney trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Australia

Airports servicing New South Wales