Which layover airport offers the lowest fares from Portland to Sydney?

Flights via Los Angeles (LAX) offer the lowest average round-trip price of $1,296.

What airlines fly to Sydney?

United Airlines, Air Canada and Delta 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 36% of people opting to fly with this airline when traveling to Sydney. Keep in mind that there are 7 different airlines that fly to Sydney on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest travel time from Portland to Sydney?

Flights connecting via San Francisco (SFO) have the shortest average one-way travel time: 18h 28m.

Which layover airport has the shortest connection time from Portland to Sydney?

Vancouver (YVR) has the shortest average layover time for this route: 2h 05m.

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

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

Which airport is the most popular layover for flights between Portland and Sydney?

Vancouver (YVR) was the most common stop: 47% of momondo users choosing 1-stop flights on this route connected there.

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 2025, there are 7 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 a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to 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 required for your trip to Sydney Kingsford Smith Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Sydney Kingsford Smith Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$487 Cheap Flights from Portland to Sydney in 2025

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Find the cheapest flights from Portland to Sydney

Round-trip

One-way

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Cheap round-trip flights

7:40 pm - 7:20 amPDX-SYD

18h 40m1 stop

9:20 am - 6:46 pmSYD-PDX

26h 26m1 stop

$907Air Canada

Find Deal

Tue, Sep 23 - Tue, Sep 30

7:40 pm - 7:20 amPDX-SYD

18h 40m1 stop

9:20 am - 2:46 pmSYD-PDX

22h 26m1 stop

$908Air Canada

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Tue, Sep 23 - Tue, Sep 30

3:25 pm - 7:20 amPDX-SYD

22h 55m1 stop

9:20 am - 9:21 amSYD-PDX

17h 01m1 stop

$916Air Canada

Find Deal

Sun, Sep 7 - Wed, Sep 17

7:40 am - 7:45 pmPDX-SYD

19h 05m1 stop

9:40 pm - 6:00 amSYD-PDX

25h 20m1 stop

$962Alaska Airlines

Find Deal

Mon, Sep 8 - Sun, Sep 14

7:40 am - 7:45 pmPDX-SYD

19h 05m1 stop

9:40 pm - 5:58 amSYD-PDX

25h 18m2 stops

$971Alaska Airlines

Find Deal

Mon, Sep 8 - Tue, Sep 16

5:01 pm - 6:35 amPDX-SYD

20h 34m1 stop

9:25 am - 4:02 pmSYD-PDX

23h 37m1 stop

$975Delta

Find Deal

Mon, Sep 22 - Tue, Sep 30

1:01 pm - 7:00 amPDX-SYD

24h 59m2 stops

9:30 am - 3:05 pmSYD-PDX

22h 35m2 stops

$977United Airlines

Find Deal

Tue, Sep 9 - Mon, Sep 15

12:40 pm - 6:35 amPDX-SYD

24h 55m1 stop

9:25 am - 6:57 pmSYD-PDX

26h 32m1 stop

$986Delta

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Mon, Sep 22 - Mon, Sep 29

1:01 pm - 6:55 amPDX-SYD

24h 54m2 stops

9:30 am - 3:05 pmSYD-PDX

22h 35m2 stops

$990United Airlines

Find Deal

Tue, Sep 9 - Tue, Sep 23

3:23 pm - 7:05 amPDX-SYD

22h 42m2 stops

9:10 am - 2:23 pmSYD-PDX

22h 13m1 stop

$1,023American Airlines

Find Deal

Thu, Sep 11 - Sun, Sep 14

Qantas Airways flights from Portland to Sydney

Our best Qantas Airways deals on Portland to Sydney flight tickets

Qantas Airways

Sep 26

PDX2:56 pmPortland

23h 09m

1 stop

SYD7:05 amSydney Kingsford Smith

Oct 3

SYD9:10 amSydney Kingsford Smith

21h 14m

1 stop

PDX1:24 pmPortland

$1,031

Find similar

Qantas Airways

Sep 25

PDX2:56 pmPortland

23h 09m

1 stop

SYD7:05 amSydney Kingsford Smith

Oct 2

SYD5:45 pmSydney Kingsford Smith

18h 25m

1 stop

PDX7:10 pmPortland

$1,032

Find similar

Qantas Airways

Sep 22

PDX5:35 pmPortland

20h 30m

1 stop

SYD7:05 amSydney Kingsford Smith

Sep 27

SYD9:10 amSydney Kingsford Smith

27h 00m

1 stop

PDX7:10 pmPortland

$1,060

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Air Canada flights from Portland to Sydney

Our best Air Canada deals on Portland to Sydney flight tickets

Air Canada

Sep 23

PDX7:40 pmPortland

18h 40m

1 stop

SYD7:20 amSydney Kingsford Smith

Sep 30

SYD9:20 amSydney Kingsford Smith

26h 26m

1 stop

PDX6:46 pmPortland

$907

Find similar

Air Canada

Sep 23

PDX7:40 pmPortland

18h 40m

1 stop

SYD7:20 amSydney Kingsford Smith

Sep 30

SYD9:20 amSydney Kingsford Smith

22h 26m

1 stop

PDX2:46 pmPortland

$908

Find similar

Air Canada

Sep 7

PDX3:25 pmPortland

22h 55m

1 stop

SYD7:20 amSydney Kingsford Smith

Sep 17

SYD9:20 amSydney Kingsford Smith

17h 01m

1 stop

PDX9:21 amPortland

$916

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 9/23

7:40 pm-7:20 am

1 stop18h 40m

Sydney Kingsford Smith

Tue 9/30

9:20 am-6:46 pm

1 stop26h 26m

$907

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 9/23

7:40 pm-7:20 am

1 stop18h 40m

Sydney Kingsford Smith

Tue 9/30

9:20 am-2:46 pm

1 stop22h 26m

$908

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sun 9/7

3:25 pm-7:20 am

1 stop22h 55m

Sydney Kingsford Smith

Wed 9/17

9:20 am-9:21 am

1 stop17h 01m

$916

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 9/8

7:40 am-7:45 pm

1 stop19h 05m

Sydney Kingsford Smith

Sun 9/14

9:40 pm-6:00 am

1 stop25h 20m

$962

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 9/8

7:40 am-7:45 pm

1 stop19h 05m

Sydney Kingsford Smith

Tue 9/16

9:40 pm-5:58 am

2 stops25h 18m

$971

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 9/22

5:01 pm-6:35 am

1 stop20h 34m

Sydney Kingsford Smith

Tue 9/30

9:25 am-4:02 pm

1 stop23h 37m

$975

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 9/9

1:01 pm-7:00 am

2 stops24h 59m

Sydney Kingsford Smith

Mon 9/15

9:30 am-3:05 pm

2 stops22h 35m

$977

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 9/22

12:40 pm-6:35 am

1 stop24h 55m

Sydney Kingsford Smith

Mon 9/29

9:25 am-6:57 pm

1 stop26h 32m

$986

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 9/9

1:01 pm-6:55 am

2 stops24h 54m

Sydney Kingsford Smith

Tue 9/23

9:30 am-3:05 pm

2 stops22h 35m

$990

PortlandSydney

PDX - SYD

PDXSYD

Portland

Thu 9/11

3:23 pm-7:05 am

2 stops22h 42m

Sydney Kingsford Smith

Sun 9/14

9:10 am-2:23 pm

1 stop22h 13m

$1,023

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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

Prices

Airlines

Layovers

What is the cheapest month to fly to Sydney?

In general, September is the cheapest month to fly from Portland to Sydney. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $999. If you are unable to visit Sydney during the month of September, then departing from Portland during the month May is also very affordable. Most momondo users find prices during this month for around $1,046.

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

The cheapest day to depart from Portland to Sydney is on a Saturday when prices can be found for as low as $1,040. The most expensive day to fly to Sydney is Thursday, with ticket prices averaging around $1,146.

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 $1,060. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Sydney are more costly at noon, with an average ticket price of $1,135. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

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 $1,140 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Portland for as low as $1,001 on momondo.

How have Portland to Sydney flight prices changed over time?

As of August 2025, prices for Portland to Sydney flights are approximately 26% 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 round-trip 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.

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How far is Portland to Sydney Kingsford Smith by plane?
A flight from Portland to Sydney Kingsford Smith will travel around 7663.9 mi. A reasonable flight in good conditions will take 18h 40m.
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 2025, there are 7 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 a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to 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 required for your trip to Sydney Kingsford Smith Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Sydney Kingsford Smith Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
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 (30% of total bookings). The next most popular airlines are Air Canada (29%), Delta (16%), and Alaska Airlines (9%).

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 $842	Free Cancellation	Rating 7.1 10,000 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $898	Free Cancellation	Rating 7.5 905 reviews	Search Qantas Airways flights
United Airlines	PriceFrom $912	Free Cancellation	Rating 7.4 8,944 reviews	Search United Airlines flights
Delta	PriceFrom $922	Free Cancellation	Rating 7.9 7,977 reviews	Search Delta flights
Hawaiian Airlines	PriceFrom $946	Free Cancellation	Rating 7.8 2,690 reviews	Search Hawaiian Airlines flights
American Airlines	PriceFrom $954	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Alaska Airlines	PriceFrom $1,099	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights

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Why use momondo?

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

Finding the right flight to Sydney from Portland is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Sydney quick and easy, saving you time and money.

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

Flights from Portland to Sydney with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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?

If you are not ready to book a flight from Portland to Sydney now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Sydney and let you know when they change.

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Cheap flights from Portland to Sydney from $487

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 9/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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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 cheapest month to fly to Sydney?

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

The cheapest day to depart from Portland to Sydney is on a Saturday when prices can be found for as low as $1,040. The most expensive day to fly to Sydney is Thursday, with ticket prices averaging around $1,146.

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?

How have Portland to Sydney flight prices changed over time?

As of August 2025, prices for Portland to Sydney flights are approximately 26% cheaper when compared to flights at the same time last year.

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

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

What airlines fly to Sydney?

Which airport is the most popular layover for flights between Portland and Sydney?

Vancouver (YVR) was the most common stop: 47% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Portland to Sydney?

Flights via Los Angeles (LAX) offer the lowest average round-trip price of $1,296.

Which layover airport has the shortest travel time from Portland to Sydney?

Flights connecting via San Francisco (SFO) have the shortest average one-way travel time: 18h 28m.

Which layover airport has the shortest connection time from Portland to Sydney?

Vancouver (YVR) has the shortest average layover time for this route: 2h 05m.

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

Traveling 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, organize 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