A sunset over Sydney's skyline, including the Sydney Opera House and Harbour Bridge.

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

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Cheap Flights from Portland to Sydney (PDX-SYD)

Prices were available within the past 7 days and start at $578 for one-way flights and $1,102 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

All deals

One way

Roundtrip

Mon, Nov 2 - Sun, Nov 8

PDX

Portland

SYD

Sydney

$1,102

Roundtrip

found 4 hours ago

Mon, Nov 2 - Sun, Nov 8

PDX

Portland

SYD

Sydney

$1,119

Roundtrip

found 4 hours ago

Sat, Jan 30 - Sun, Feb 14

PDX

Portland

SYD

Sydney

$1,119

Roundtrip

found 12 hours ago

Wed, Nov 18 - Thu, Dec 3

PDX

Portland

SYD

Sydney

$1,151

Roundtrip

found 14 hours ago

Wed, Nov 11 - Thu, Nov 26

PDX

Portland

SYD

Sydney

$1,156

Roundtrip

found 14 hours ago

Tue, Feb 9 - Wed, Feb 24

PDX

Portland

SYD

Sydney

$1,164

Roundtrip

found 12 hours ago

Wed, Jan 27 - Wed, Feb 10

PDX

Portland

SYD

Sydney

$1,167

Roundtrip

found 21 hours ago

Wed, Aug 19 - Wed, Aug 26

PDX

Portland

SYD

Sydney

$1,231

Roundtrip

found 21 hours ago

Mon, Aug 10 - Tue, Aug 25

PDX

Portland

SYD

Sydney

$1,234

Roundtrip

found 15 hours ago

Sun, Aug 9 - Mon, Aug 24

PDX

Portland

SYD

Sydney

$1,238

Roundtrip

found 15 hours ago

Alternative airports near Sydney

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

SYD

Kingsford Smith Intl.

Cheapest

16 min

Flights from $1,201

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

February is typically the cheapest month to fly

From $1,048 - $1,244 per traveler.

What you need to know for your flight from Portland Intl. to Kingsford Smith Intl.

Portland (PDX) to Sydney (SYD) at a glance

Embark on an international adventure with various airlines flying from Portland (PDX) to Sydney (SYD). Explore options from full-service carriers and budget-friendly choices to discover the itinerary that suits your budget and travel plans. With a range of flights available, you can easily find the cheapest flights from Portland to Sydney while planning your visit to Sydney’s iconic attractions and vibrant neighborhoods. Check out the essential details for your journey from Portland International Airport to Kingsford Smith International Airport.

Fastest flight duration: around 17h 15m in-flight, plus roughly 2h 15m layover with one stop
Route distance: roughly 7,700 miles (12,390 km)
Flights per week: around 8 departures on average
Typical fares (one-way): economy tickets often range from $425–$990, depending on seasonality and how far ahead you book

Flights from Portland International Airport (PDX) to Kingsford Smith International Airport (SYD)

Based on recent traveler bookings, here are the top airlines favored for flights from Portland to Sydney, particularly for one-stop and multi-stop journeys. Popular layovers include San Francisco International Airport (SFO) with a typical layover of about 1 hour and 30 minutes, Los Angeles International Airport (LAX) at approximately 2 hours and 45 minutes, and Daniel K. Inouye International Airport (HNL), also around 1 hour and 30 minutes. This variety allows you to explore options that best suit your price, total travel time, and cabin class preferences.

United: Serving as a full-service airline, United provides one-stop travel options with one-way fares generally between $435 and $905. This carrier represents around 31% of departures on this route, featuring an in-flight duration of 17 hours and 15 minutes, with a total travel time of about 19 hours and 30 minutes, including layover time.
Alaska Airlines: Another full-service option, Alaska Airlines offers one-stop service with one-way ticket prices typically ranging from $425 to $1025. It accounts for approximately 16% of departures on this route, boasting an in-flight time of 17 hours and 15 minutes and a total journey that lasts roughly 19 hours and 30 minutes, factoring in layovers.
Delta: Delta is a full-service airline providing one-stop services, with one-way fares commonly falling between $450 and $1515. It represents about 15% of the departures on this route, with an in-flight time of 17 hours and 15 minutes and a complete travel duration of around 19 hours and 30 minutes, including layovers.
Qantas Airways: Offering one-stop service, Qantas Airways is a full-service carrier with one-way fares generally ranging from $490 to $3450. It accounts for roughly 10% of departures on this route, with an in-flight time of 17 hours and 15 minutes, leading to a total travel time of approximately 19 hours and 30 minutes, including layover periods.
Air Canada: A full-service airline, Air Canada provides one-stop travel with one-way fares typically between $500 and $725. This airline makes up about 9% of departures on this route, featuring an in-flight duration of 17 hours and 15 minutes and a total journey time of around 19 hours and 30 minutes, including layover time.

Best time to fly from Portland (PDX) to Sydney (SYD)

The most popular months for travelers flying from Portland to Sydney are January, February, and March, when peak temperatures in Sydney reach up to 73.4°F in January. If you prefer quieter travel, consider September, the least busy time to visit with temperatures around 61.2°F and typically the lowest average one-way fare (around $542). Flight availability peaks in August, with approximately 11 flights per week, making it easier to find convenient departure times.

Cheapest time to fly: September usually offers good deals with average one-way fare around $542, roughly 20% cheaper than the yearly average.
More budget-friendly months to fly: April, February, and November typically offer average one-way fares roughly ranging from $551 to $596.
Most flight options: August has the highest number of flights from Portland to Sydney, with approximately 11 flights per week, giving you more flexibility in scheduling your trip.

Month	Temperature	Demand	Weekly Flights	Average one-way Fare
January	73.4°F (23.0°C)	High	7	$794
February	72.7°F (22.6°C)	High	10	$580
March	70.9°F (21.6°C)	High	9	$600
April	66.4°F (19.1°C)	Average	10	$551
May	61.2°F (16.2°C)	Average	7	$710
June	57.2°F (14.0°C)	Low	9	$654
July	55.9°F (13.3°C)	Average	7	$645
August	57.2°F (14.0°C)	Average	11	$653
September	61.2°F (16.2°C)	Low	7	$542
October	64.6°F (18.1°C)	Low	7	$600
November	67.6°F (19.8°C)	Average	10	$596
December	70.3°F (21.3°C)	Average	8	$1231

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative routes from Portland (PDX) to Sydney (SYD)

Portland to Sydney (PDX-RSE): Rose Bay Seaplane Base Airport (RSE) is located approximately 7 miles from Kingsford Smith International Airport (SYD).
Portland to Newcastle (PDX-NTL): Williamtown Airport (NTL) lies around 87 miles away from Kingsford Smith International Airport (SYD).
Portland to Singleton (PDX-SIX): Singleton Airport (SIX) is situated about 92 miles from Kingsford Smith International Airport (SYD).

How to find the best prices for flights from Portland (PDX) to Sydney (SYD)

Getting some of the best deals on flights from Portland to Sydney is all about timing and flexibility. Here are some key tips to help you save:

Best times to book and fly: cheaper fares are typically found when booking at least two months in advance, which is when most travelers make their reservations. Morning departures from 5 a.m. to 12 p.m. often offer lower prices, while afternoon flights from 12 p.m. to 6 p.m. are the most popular. Additionally, flying on Tuesday usually results in cheaper fares, although Thursday is the most favored travel day.
Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.*
Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Kingsford Smith International Airport from Portland International Airport

Sydney welcomes travelers from Portland with a range of transport options based on price, convenience, and proximity. Here's how to reach Sydney efficiently:

Hotel transfer: Transfers offer a convenient way to reach your hotel in Sydney, with private rides that can be arranged in advance.
Car rental: Renting a car from Kingsford Smith International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Kingsford Smith International Airport on Expedia.
Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
Public transportation: From Kingsford Smith International Airport, several transport options are conveniently accessible. International Airport Station (a metro station) is located about 0.1 miles away on foot, while Sydney Arncliffe Station (a train station) is approximately 1.2 miles from the airport and best reached by car. Additionally, Sydney Seaport (a seaport) is around 6.7 miles away by car.

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 $578 and cheap return flights from $1,102 Portland, OR (PDX-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) with Expedia. One-way flights usually range from $582 to $8000, and return flights typically cost between $1249 and $9180. 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 Portland, OR (PDX-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.

What is the cheapest month to fly from Portland, OR (PDX-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?

The cheapest month to fly from PDX to SYD is November 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're 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-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?

Enter PDX to SYD and your travel dates, then apply the 'Nonstop' filter to see only direct flights.

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.

What is the earliest flight from Portland, OR (PDX-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?

The earliest flight from Portland International Airport (PDX) to Kingsford Smith International (SYD) typically departs at around 12:55 AM, operated by American Airlines. This seasonal service is available in April, allowing you to arrive in Sydney early and make the most of your day. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.

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 late afternoon, from 3pm to 6pm. About 34% of passengers prefer this time window. Many major carriers, including Delta Air Lines, Alaska Airlines, and American Airlines, offer flights during this window. This timing works well because it allows you to maximize your day in Portland before heading off to Sydney.

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 7,680 miles. 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.)?

You can fly business class between PDX and SYD. Airlines that offer business class service on this route include:

Delta Air Lines
United Airlines
American Airlines

First class is available with American Airlines.

How do I earn miles on a Portland, OR (PDX-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) flight with Expedia?

It's easy to earn miles on a Portland, OR (PDX-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) 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.

What airports do you fly into for Sydney from Portland Intl. (PDX)?

If you're planning to travel to Sydney from Portland Intl. (PDX), you can fly into Kingsford Smith Intl. (SYD) Some flights may connect through major hubs like San Francisco Intl. (SFO), Vancouver Intl. (YVR), Los Angeles Intl. (LAX) before reaching Sydney. Compare routes and airports on Expedia to find the best flight options for your travel plans.

Is it cheaper to buy a plane ticket from Portland, OR (PDX-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) at the last minute?

Typically, booking a last minute flight from Portland, OR (PDX-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) 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-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) flight and hotel package?

Securing a Portland, OR (PDX-Portland Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) Sydney Vacation Packages 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, Air Tahiti Nui, Alaska Airlines, All Nippon Airways, American Airlines, Asiana Airlines, British Airways, Cathay Pacific, Delta, Japan Airlines, Korean Air, Qantas Airways, Qatar Airways, United
Roundtrip price	$1,101
Distance	7679 mi

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Portland to Sydney Flights

The cheapest times to fly from Portland to Sydney

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Portland to Sydney are during the month of November. You can find some of the cheapest flights from Portland to Sydney with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Portland to Sydney

Sunday is one of the best days to book for cheap flights from Portland to Sydney: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Portland to Sydney

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Portland to Sydney in 2026. You can also book with separate airlines for your outbound and return journeys, from $578 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Portland to Sydney flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Portland to Sydney airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

*Flight schedules are subject to change.

*Available to One Key members.

Explore a world of travel with Expedia

Flights

$578 Cheap Flights from Portland (PDX) to Sydney (SYD)

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

Be in the know

Book smarter

Earn twice

Cheap Flights from Portland to Sydney (PDX-SYD)

Alternative airports near Sydney

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

February is typically the cheapest month to flyFebruary is typically the cheapest month to fly

What you need to know for your flight from Portland Intl. to Kingsford Smith Intl.

Portland (PDX) to Sydney (SYD) at a glance

Flights from Portland International Airport (PDX) to Kingsford Smith International Airport (SYD)

Best time to fly from Portland (PDX) to Sydney (SYD)

Alternative routes from Portland (PDX) to Sydney (SYD)

How to find the best prices for flights from Portland (PDX) to Sydney (SYD)

Arriving at Kingsford Smith International Airport from Portland International Airport

Frequently asked questions

Travel information

Book with confidence

Portland to Sydney Flights

Explore a world of travel with Expedia

February is typically the cheapest month to fly