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£438 Cheap Flights from Portland (PDX) to Sydney (SYD)

View £438 flight on Sun, 16 Aug 2026Opens in a new window

Popular airlines from Portland International Airport (PDX) to Sydney Airport (SYD)

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Cheap Flights from Portland (PDX) to Sydney (SYD)

Prices were available within the past 7 days and start at £438 for one-way flights and £812 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Mon, 17 Aug - Sun, 30 Aug
PDX
Portland
SYD
Sydney
£812 Return, found 1 day ago
£812
Return
found 1 day ago
Select Alaska Airlines flight, departing Mon, 17 Aug from Portland to Sydney, returning Sun, 30 Aug, priced at £812 found 1 day ago
Alaska Airlines
Sun, 16 Aug - Sun, 23 Aug
PDX
Portland
SYD
Sydney
£819 Return, found 22 hours ago
£819
Return
found 22 hours ago
Select Alaska Airlines flight, departing Sun, 16 Aug from Portland to Sydney, returning Sun, 23 Aug, priced at £819 found 22 hours ago
Alaska Airlines
Sat, 23 Jan - Sun, 7 Feb
PDX
Portland
SYD
Sydney
£821 Return, found 3 days ago
£821
Return
found 3 days ago
Select Alaska Airlines flight, departing Sat, 23 Jan from Portland to Sydney, returning Sun, 7 Feb, priced at £821 found 3 days ago
Alaska Airlines
Mon, 17 Aug - Thu, 3 Sept
PDX
Portland
SYD
Sydney
£849 Return, found 3 days ago
£849
Return
found 3 days ago
Select Alaska Airlines flight, departing Mon, 17 Aug from Portland to Sydney, returning Thu, 3 Sept, priced at £849 found 3 days ago
Alaska Airlines
Sat, 23 Jan - Fri, 5 Feb
PDX
Portland
SYD
Sydney
£858 Return, found 3 days ago
£858
Return
found 3 days ago
Select Alaska Airlines flight, departing Sat, 23 Jan from Portland to Sydney, returning Fri, 5 Feb, priced at £858 found 3 days ago
Alaska Airlines
Mon, 17 Aug - Sun, 6 Sept
PDX
Portland
SYD
Sydney
£874 Return, found 3 days ago
£874
Return
found 3 days ago
Select Alaska Airlines flight, departing Mon, 17 Aug from Portland to Sydney, returning Sun, 6 Sept, priced at £874 found 3 days ago
Air New Zealand
Mon, 18 Jan - Tue, 2 Feb
PDX
Portland
SYD
Sydney
£903 Return, found 3 days ago
£903
Return
found 3 days ago
Select Air New Zealand flight, departing Mon, 18 Jan from Portland to Sydney, returning Tue, 2 Feb, priced at £903 found 3 days ago
United
Sun, 16 Aug - Sun, 23 Aug
PDX
Portland
SYD
Sydney
£911 Return, found 22 hours ago
£911
Return
found 22 hours ago
Select United flight, departing Sun, 16 Aug from Portland to Sydney, returning Sun, 23 Aug, priced at £911 found 22 hours ago
Qantas Airways
Sun, 16 Aug - Sun, 23 Aug
PDX
Portland
SYD
Sydney
£948 Return, found 22 hours ago
£948
Return
found 22 hours ago
Select Qantas Airways flight, departing Sun, 16 Aug from Portland to Sydney, returning Sun, 23 Aug, priced at £948 found 22 hours ago
Delta
Wed, 30 Sept - Mon, 12 Oct
PDX
Portland
SYD
Sydney
£965 Return, found 3 days ago
£965
Return
found 3 days ago
Select Delta flight, departing Wed, 30 Sept from Portland to Sydney, returning Mon, 12 Oct, priced at £965 found 3 days ago

Alternative airports near Sydney

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Kingsford Smith Intl. SYD. Cheapest option available. Average driving time to city centre is 16 minutes. Flights from £812
SYD
Kingsford Smith Intl.
Cheapest
Average driving time to city centre16 min
Flights from £812

Find the cheapest month to fly from Portland (PDX) to Sydney (SYD)

October is typically the cheapest month to fly

From £777 - £924 per traveller.

Frequently asked questions

How much does a flight from Portland, OR (PDX-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) cost?
You can find cheap one-way flights from £438 and cheap return flights from £812 PDX to SYD with Expedia. Return flights often range between £863 and £3366. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when PDX to SYD ticket fares go up or down.
What is the cheapest month to fly from Portland, OR (PDX-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
The cheapest months to fly from PDX to SYD are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Portland, OR (PDX) to Sydney, NSW (SYD)?
Enter PDX to SYD and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Portland, OR (PDX-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
Delta is one of the cheapest airlines offering connecting return flights from Portland International Airport (PDX) to Kingsford Smith International Airport (SYD), with prices starting from around £906 for flights that can be booked for departure within the next year. These flights typically include a layover in Seattle - Tacoma International (SEA). Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
How do I find cheap flights from Portland, OR (PDX-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
To find a cheap flight from Portland, OR (PDX-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Portland, OR (PDX-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Portland, OR (PDX-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
There are approximately 41 connecting flights per day from Portland Intl. (PDX) to Kingsford Smith Intl. (SYD). Some common connection points include Los Angeles Intl. (LAX), San Francisco Intl. (SFO), and Vancouver Intl. (YVR).
What is the earliest flight from Portland, OR (PDX) to Sydney, NSW (SYD)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from Portland, OR (PDX) to Sydney, NSW (SYD). To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Portland, OR (PDX-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
You'll typically find the most flights from Portland, OR (PDX-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) on a Thursday, with around 46 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include Alaska Airlines, United, and American Airlines. Flight options are notably more plentiful on Thursdays compared to other days of the week, offering you more flexibility.
What are the most popular departure times for flights from Portland, OR (PDX-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
The most popular departure times for flights from Portland, OR (PDX-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) are in the afternoon, from 3pm to 6pm. Many major carriers, including Delta, Alaska Airlines and United, offer flights during this window. Many travellers prefer these times as they allow you to have a full day before your flight and arrive in Sydney at a convenient time.
How long does it take to fly from Portland, OR (PDX-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
A flight from PDX to SYD with a layover takes around 20 hours 20 minutes, with the route covering approximately 12,360 kilometers. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Portland, OR (PDX-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
Yes, you can fly business class or first class between PDX and SYD. Airlines that offer business class service on this route include:
  • Alaska Airlines
  • Delta
  • United
  • American Airlines
First class cabins are available on Alaska Airlines and American Airlines.
How do I earn miles on a Portland, OR (PDX) to Sydney, NSW (SYD) flight with Expedia?
It's easy to earn miles on a Portland, OR (PDX) to Sydney, NSW (SYD) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
Is it cheaper to buy a plane ticket from Portland, OR (PDX) to Sydney, NSW (SYD) at the last minute?
Typically, booking a last minute flight from Portland, OR (PDX) to Sydney, NSW (SYD) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Portland, OR (PDX) to Sydney, NSW (SYD) flight and hotel package?
Securing a Portland, OR (PDX) to Sydney, NSW (SYD) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Portland, OR (PDX-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
If you booked your Portland, OR (PDX-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Portland Intl.
Destination airport
Kingsford Smith Intl.
Airlines serving
Air Canada, Air New Zealand, Alaska Airlines, American Airlines, British Airways, Delta, Qantas Airways, United
Return price
£812
Distance
12286 km

Book with confidence

Compare flights from Portland to Sydney easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Portland to Sydney. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Kingsford Smith Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Portland Intl. to Kingsford Smith Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Portland Intl. (PDX) to Kingsford Smith Intl. (SYD)

The easiest way to view the best deals on flights from Portland to Sydney today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Portland Intl. to Kingsford Smith Intl. start at just £812 and range up to £965.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Portland and Sydney
  • booking your flight during August, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Portland to Sydney flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Portland Intl. to Kingsford Smith Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Portland to Sydney easily and book with confidence

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