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$457+ 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 5/31. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
May 10 — May 171
Sun 5/10
Sun 5/17
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 April 10, 2026.

This Vliegwinkel deal was found by Cheapflights users on 4/5. 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/253:30 pm
PDX
-
SYD
1 stop22h 50m
Air Canada
Sun 6/79:20 am
SYD
-
PDX
1 stop22h 25m
Air Canada
Deal found 4/5$987
This Air Canada deal was found by Cheapflights users on 4/6. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/2210:10 am
PDX
-
SYD
1 stop28h 10m
Air Canada
Tue 7/219:20 am
SYD
-
PDX
1 stop26h 51m
Air Canada
Deal found 4/6$994
This Justfly.com deal was found by Cheapflights users on 4/5. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/257:10 pm
PDX
-
SYD
1 stop19h 25m
Air Canada
Tue 11/311:20 am
SYD
-
PDX
1 stop26h 10m
Air Canada
Deal found 4/5$1,004
This Air Canada deal was found by Cheapflights users on 4/6. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/63:30 pm
PDX
-
SYD
1 stop22h 50m
Multiple Airlines
Sun 7/266:00 am
SYD
-
PDX
2 stops20h 31m
Multiple Airlines
Deal found 4/6$1,014
This Air Canada deal was found by Cheapflights users on 4/5. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/17:45 pm
PDX
-
SYD
1 stop18h 35m
Multiple Airlines
Sat 6/68:10 pm
SYD
-
PDX
2 stops30h 20m
Multiple Airlines
Deal found 4/5$1,021
This Air Canada deal was found by Cheapflights users on 4/6. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/217:45 pm
PDX
-
SYD
1 stop18h 35m
Air Canada
Sat 10/37:00 pm
SYD
-
PDX
2 stops36h 51m
Air Canada
Deal found 4/6$1,025
This Air Canada deal was found by Cheapflights users on 4/7. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/87:10 pm
PDX
-
SYD
2 stops24h 05m
Multiple Airlines
Sat 11/1411:20 am
SYD
-
PDX
1 stop22h 20m
Multiple Airlines
Deal found 4/7$1,033

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 April 10, 2026.
Use the filters below to find and compare flights from Portland to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 7/20

11:16 am-6:55 am

1 stop26h 39m

Sydney Kingsford Smith

Mon 7/27

9:30 am-7:18 pm

2 stops26h 48m

$1,322

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sun 5/24

1:17 pm-6:55 am

1 stop24h 38m

Sydney Kingsford Smith

Sun 5/31

9:30 am-7:18 pm

2 stops26h 48m

$1,323

PortlandSydney

PDX - SYD

PDXSYD

Portland

Thu 6/18

5:32 pm-6:50 pm

1 stop32h 18m

Sydney Kingsford Smith

Tue 6/23

8:45 pm-9:02 am

2 stops29h 17m

$1,390

PortlandSydney

PDX - SYD

PDXSYD

Portland

Fri 6/19

10:53 am-6:50 am

1 stop26h 57m

Sydney Kingsford Smith

Mon 6/22

9:15 am-7:24 pm

1 stop27h 09m

$1,396

PortlandSydney

PDX - SYD

PDXSYD

Portland

Wed 8/19

8:40 am-7:00 am

2 stops29h 20m

Sydney Kingsford Smith

Wed 9/2

9:30 am-6:11 pm

3 stops25h 41m

$1,411

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sat 6/20

10:53 am-6:50 am

1 stop26h 57m

Sydney Kingsford Smith

Fri 6/26

9:15 am-5:10 pm

2 stops48h 55m

$1,415

PortlandSydney

PDX - SYD

PDXSYD

Portland

Wed 7/15

6:50 pm-7:00 am

2 stops43h 10m

Sydney Kingsford Smith

Sat 8/15

9:30 am-6:11 pm

3 stops25h 41m

$1,961

PortlandSydney

PDX - SYD

PDXSYD

Portland

Thu 9/24

9:29 pm-10:45 am

2 stops44h 16m

Sydney Kingsford Smith

Mon 10/5

10:10 pm-10:10 am

3 stops54h 00m

$2,432
Quickest round-trip

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sat 9/12

2:50 pm-9:35 am

2 stops25h 45m

Sydney Kingsford Smith

Thu 9/17

9:10 am-1:32 pm

1 stop21h 22m

$3,001

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 7/6

6:00 pm-10:45 am

3 stops47h 45m

Sydney Kingsford Smith

Sun 7/26

10:10 pm-7:37 am

2 stops50h 27m

$3,413

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/6

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
BudgetAirPrice Accuracy1 starTrust Score*3 stars
Trip.comPrice 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 FlightHub the most. FlightHub 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 April 3, 2026.

Booking 67 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 $1,192). 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 April 10, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines,Hawaiian Airlines, andQantas Airways 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
7.9
Good
12,210 reviews

Entertainment

7.0

Food

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well
Alaska Airlines
7.9
Good
12,210 reviews
Alaska Airlines
7.9
Good
12,210 reviews

Entertainment

7.0

Food

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well
Hawaiian Airlines
7.8
Good
2,839 reviews
Alaska Airlines
7.9
Good
12,210 reviews

Entertainment

7.0

Food

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well
Qantas Airways
7.5
Good
1,018 reviews
Alaska Airlines
7.9
Good
12,210 reviews

Entertainment

7.0

Food

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well
United Airlines
7.4
Good
9,567 reviews
Alaska Airlines
7.9
Good
12,210 reviews

Entertainment

7.0

Food

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well
Air Canada
7.1
Good
10,915 reviews
Alaska Airlines
7.9
Good
12,210 reviews

Entertainment

7.0

Food

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well

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 $1,322, United Airlines can have you in Sydney from Portland in 26h 39m. There are 7674 mi between Portland and Sydney. This flight may include one or multiple stops.

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

    Delta, at $229, 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 81% 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 United Airlines. According to our data, you can fly for as low as $431. Users have also found prices from $457 and $569 on Air Canada and Qantas Airways, 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 $59 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 $1,192). 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
Coogee
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.
Boise to Sydney flights
Redmond to Sydney flights
Medford to Sydney flights

Top 8 airlines flying from Portland to Sydney

Discover the top 8 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 April 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$229Average$1,268FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$550Average$1,158FlexibilityNo cancel feeOn-time85%
Air CanadaCheapest$884Average$1,162FlexibilityNo cancel feeOn-time67%
Qantas AirwaysCheapest$898Average$1,152FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$954Average$1,042FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$965Average$1,270FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$999Average$1,174FlexibilityNo cancel feeOn-time75%
Alaska AirlinesCheapest$1,140Average$1,317FlexibilityNo cancel feeOn-timeN/A

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