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$424+ Cheap flights from Portland (PDX) to Sydney (SYD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/26. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
Feb 23 — Mar 21
Mon 2/23
Mon 3/2
1 adult, Economy
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Cheap flight deals from Portland to Sydney

Cheapest flights from Portland to Sydney
Explore the most affordable flight options available from Portland to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 24, 2026.

This oojo deal was found by Cheapflights users on 1/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/283:22 pm
PDX
-
SYD
2 stops34h 28m
Qantas Airways
Sun 2/1511:20 am
SYD
-
PDX
1 stop24h 53m
Qantas Airways
Deal found 1/23$973
This oojo deal was found by Cheapflights users on 1/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/210:52 am
PDX
-
SYD
1 stop25h 33m
Qantas Airways
Tue 2/107:15 pm
SYD
-
PDX
2 stops42h 36m
Qantas Airways
Deal found 1/24$982
This oojo deal was found by Cheapflights users on 1/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/166:25 am
PDX
-
SYD
2 stops56h 40m
Qantas Airways
Mon 3/211:20 am
SYD
-
PDX
1 stop24h 53m
Qantas Airways
Deal found 1/24$983
This oojo deal was found by Cheapflights users on 1/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/266:25 am
PDX
-
SYD
2 stops43h 25m
Qantas Airways
Tue 3/109:25 pm
SYD
-
PDX
1 stop17h 09m
Qantas Airways
Deal found 1/23$989
This oojo deal was found by Cheapflights users on 1/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/176:25 am
PDX
-
SYD
2 stops32h 25m
Qantas Airways
Tue 2/249:25 pm
SYD
-
PDX
1 stop18h 09m
Qantas Airways
Deal found 1/22$1,000
This oojo deal was found by Cheapflights users on 1/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/55:51 pm
PDX
-
SYD
1 stop19h 34m
Qantas Airways
Tue 5/126:25 am
SYD
-
PDX
2 stops24h 01m
Qantas Airways
Deal found 1/23$1,003
This oojo deal was found by Cheapflights users on 1/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/283:22 pm
PDX
-
SYD
2 stops34h 28m
Qantas Airways
Thu 2/511:20 am
SYD
-
PDX
1 stop25h 32m
Qantas Airways
Deal found 1/23$1,008
This oojo deal was found by Cheapflights users on 1/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/274:51 pm
PDX
-
SYD
1 stop18h 19m
Qantas Airways
Thu 1/2910:05 am
SYD
-
PDX
2 stops22h 36m
Qantas Airways
Deal found 1/23$1,013
This oojo deal was found by Cheapflights users on 1/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/304:51 pm
PDX
-
SYD
1 stop18h 19m
Qantas Airways
Sat 2/148:30 am
SYD
-
PDX
2 stops27h 43m
Qantas Airways
Deal found 1/22$1,014

Find flight deals from Portland to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Sydney (SYD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$973
(oojo)

One-way from

$424
(Trip.com)

Popular in

December

Cheapest in

June

Average price

$1,161
Provider with most accurate pricing for Portland-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Sydney Kingsford Smith flights.
Search Deals
From Portland to Sydney Kingsford Smith
Search Deals
One-way flight from Portland to Sydney Kingsford Smith
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($186 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($56 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to Sydney that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 24, 2026.
Use the filters below to find and compare flights from Portland to Sydney that are best for you.

Fly from

Portland

Fly to

Sydney

Route

Depart

Return

Price

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sun 4/19

9:30 pm-11:55 am

2 stops45h 25m

Sydney Kingsford Smith

Sun 4/26

1:15 pm-8:35 pm

2 stops24h 20m

$1,026

PortlandSydney

PDX - SYD

PDXSYD

Portland

Thu 4/23

9:30 pm-11:45 am

2 stops45h 15m

Sydney Kingsford Smith

Sun 5/10

1:15 pm-8:35 pm

2 stops24h 20m

$1,026

PortlandSydney

PDX - SYD

PDXSYD

Portland

Wed 2/18

10:48 am-10:05 pm

2 stops40h 17m

Sydney Kingsford Smith

Mon 3/16

2:00 pm-8:53 pm

2 stops24h 53m

$1,066

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 3/9

2:30 pm-10:05 pm

2 stops37h 35m

Sydney Kingsford Smith

Tue 3/24

6:00 am-9:35 am

2 stops45h 35m

$1,074

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 3/17

9:50 am-8:35 am

1 stop28h 45m

Sydney Kingsford Smith

Tue 3/24

10:20 am-9:15 am

1 stop16h 55m

$1,078

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 3/9

7:05 pm-8:35 am

1 stop19h 30m

Sydney Kingsford Smith

Tue 3/24

10:20 am-9:15 am

1 stop16h 55m

$1,078

PortlandSydney

PDX - SYD

PDXSYD

Portland

Thu 2/26

3:15 pm-9:35 am

1 stop23h 20m

Sydney Kingsford Smith

Tue 3/10

10:20 am-2:40 pm

1 stop22h 20m

$1,120

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 2/23

5:39 pm-9:10 am

2 stops44h 31m

Sydney Kingsford Smith

Sat 3/7

11:20 am-5:13 pm

1 stop24h 53m

$1,123

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 3/3

10:30 am-7:45 pm

1 stop38h 15m

Sydney Kingsford Smith

Sun 3/8

9:40 pm-5:27 am

1 stop25h 47m

$1,181

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sun 3/1

10:30 am-7:45 pm

1 stop38h 15m

Sydney Kingsford Smith

Sun 3/8

9:40 pm-5:27 am

1 stop25h 47m

$1,181

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 22 results
1
2
3

Compare providers for flights from Portland to Sydney

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Sydney in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
Trip.comPrice Accuracy2 starsTrust Score*3 stars
BudgetAirPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Portland-Sydney flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland-Sydney flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland-Sydney flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland-Sydney flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland-Sydney flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Portland to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Portland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Portland to Sydney

How far ahead should I book a flight from Portland to Sydney?

Use this chart to determine the optimal time to book a round-trip flight from Portland to Sydney. Price data was last updated on January 23, 2026.

Booking 34 days in advance of your planned departure date is, on average, the best time to get cheap flights from Portland to Sydney. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Portland to Sydney?

Currently, February is the cheapest month in which you can book a flight from Portland to Sydney (average of $504). Flying from Portland to Sydney in December is currently the most expensive (average of $1,146). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Portland to Sydney?

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sydney. Reviews last updated January 24, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta, and Hawaiian Airlines from Portland to Sydney to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,787 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Alaska Airlines
8.0
Very good
11,787 reviews
Alaska Airlines
8.0
Very good
11,787 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Delta
7.9
Good
8,112 reviews
Alaska Airlines
8.0
Very good
11,787 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Hawaiian Airlines
7.8
Good
2,829 reviews
Alaska Airlines
8.0
Very good
11,787 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
United Airlines
7.4
Good
9,193 reviews
Alaska Airlines
8.0
Very good
11,787 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Air Canada
7.1
Good
10,652 reviews
Alaska Airlines
8.0
Very good
11,787 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading

Related info for your journey

Find useful and relevant information for your journey from Portland to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Portland to Sydney?

    For as low as $1,078, Air Canada can have you in Sydney from Portland in 28h 45m. There are 7674 mi between Portland and Sydney.

  • What are the cheapest airlines flying from Portland to Sydney round-trip?

    Delta, at $497, was found to be the cheapest airline from Portland to Sydney.Alternate airlines to your destination round-trip include Hawaiian Airlines and Air Canada. Delta is 57% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Portland to Sydney one-way?

    For one-way options, check prices for Qantas Airways. According to our data, you can fly for as low as $428. Users have also found prices from $431 and $439 on United Airlines and Delta, respectively.

  • Where are the most common layover locations when flying from Portland to Sydney?

    The most popular layover on flights from Portland to Sydney is San Francisco.

  • What are some popular things to do or see while on a layover in San Francisco?

    If you're on a layover in San Francisco and looking for things to do, consider visiting Fisherman's Wharf, Union Square, or Bill Graham Civic Auditorium. Fisherman's Wharf, Union Square, and Bill Graham Civic Auditorium can be accessed by traveling approximately 13.0 mi, 11.6 mi, and 11.1 mi, respectively from San Francisco. Travelers can rent a car at San Francisco for an average daily rate of $49 to make sightseeing during their layover a little easier.

  • Where are the least popular layover locations for Portland to Sydney flights?

    Portland to Sydney flights that have layovers will least frequently stop in Los Angeles.

  • Can I find deals for flights from Portland to Sydney that include hotel bookings?

    Yes. In addition to deals on Portland to Sydney flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Sydney?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Sydney.

  • Can I find deals for business class flights from Portland to Sydney?

    Yes. Cheapflights offers flight deals from Portland to Sydney by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Portland to Sydney?

    Currently, February is the cheapest month in which you can book a flight from Portland to Sydney (average of $504). Flying from Portland to Sydney in December is currently the most expensive (average of $1,146). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Manly

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Portland to Sydney

See prices for flight routes from nearby airports that may be better suited for you.
Redmond to Sydney flights
Boise to Sydney flights
Eugene to Sydney flights
Portland to Coolangatta flights
Medford to Sydney flights

Top 7 airlines flying from Portland to Sydney

Discover the top 7 airlines that operate flights from Portland to Sydney. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$497Average$1,069FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$550Average$1,157FlexibilityNo cancel feeOn-time85%
Air CanadaCheapest$840Average$1,143FlexibilityNo cancel feeOn-time67%
Qantas AirwaysCheapest$898Average$1,305FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$912Average$1,171FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$952Average$974FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$999Average$1,183FlexibilityNo cancel feeOn-time75%

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