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$518+ 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 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from Portland to Sydney Kingsford Smith are usually found in September or May, booked 88 days in advance, depart on a Saturday or Sunday and return on a Wednesday

Cheap 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 septiembre 11, 2025.

Round-trip from

$931
(SmartFares)

One-way from

$518
(Air Canada)

Popular in

December

Cheapest in

September

Average price

$1,001
From Portland to Sydney Kingsford Smith
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One-way flight from Portland to Sydney Kingsford Smith
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Highest demand for flights based on searches. 9% potential increase in price ($113 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 septiembre 11, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/152:50 pmPDX - SYD
1 stop23h 15mAlaska Airlines
sáb. 9/279:10 amSYD - PDX
1 stop27h 00mAlaska Airlines
Deal found 9/10$854
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/1310:30 amPDX - SYD
1 stop27h 35mAlaska Airlines
sáb. 9/279:10 amSYD - PDX
1 stop27h 00mAlaska Airlines
Deal found 9/10$889
This SmartFares deal was found by Cheapflights users on 9/9. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/215:55 pmPDX - SYD
1 stop32h 50mHawaiian Airlines
dom. 10/59:40 pmSYD - PDX
1 stop18h 50mHawaiian Airlines
Deal found 9/9$931
This FlightHub deal was found by Cheapflights users on 9/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/235:35 pmPDX - SYD
1 stop20h 30mQantas Airways
mar. 9/309:10 amSYD - PDX
1 stop21h 14mQantas Airways
Deal found 9/11$938
This Justfly.com deal was found by Cheapflights users on 9/9. 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.
mié. 9/102:50 pmPDX - SYD
1 stop23h 15mQantas Airways
mié. 9/175:45 pmSYD - PDX
1 stop18h 25mQantas Airways
Deal found 9/9$939
This Gotogate deal was found by Cheapflights users on 9/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/147:40 pmPDX - SYD
2 stops33h 40mAir Canada
dom. 9/289:20 amSYD - PDX
1 stop30h 41mAir Canada
Deal found 9/11$955
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/213:23 pmPDX - SYD
2 stops22h 42mAmerican Airlines
dom. 10/510:10 amSYD - PDX
2 stops24h 56mAmerican Airlines
Deal found 9/10$962
This Qantas Airways deal was found by Cheapflights users on 9/11. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/152:56 pmPDX - SYD
1 stop23h 09mQantas Airways
mié. 9/175:45 pmSYD - PDX
1 stop19h 45mQantas Airways
Deal found 9/11$970
This American Airlines deal was found by Cheapflights users on 9/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/141:59 pmPDX - SYD
2 stops24h 06mAmerican Airlines
dom. 9/285:45 pmSYD - PDX
2 stops22h 26mAmerican Airlines
Deal found 9/11$974
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/153:23 pmPDX - SYD
2 stops22h 42mAmerican Airlines
dom. 9/285:45 pmSYD - PDX
2 stops22h 26mAmerican Airlines
Deal found 9/10$975

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 septiembre 11, 2025.
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

mar. 9/23

2:50 pm-7:05 am

1 stop23h 15m

Sydney Kingsford Smith

mar. 9/30

9:10 am-1:24 pm

1 stop21h 14m

$938

PortlandSydney

PDX - SYD

PDXSYD

Portland

dom. 9/21

3:23 pm-7:05 am

2 stops22h 42m

Sydney Kingsford Smith

dom. 10/5

10:10 am-5:06 pm

2 stops24h 56m

$962

PortlandSydney

PDX - SYD

PDXSYD

Portland

lun. 9/15

2:56 pm-7:05 am

1 stop23h 09m

Sydney Kingsford Smith

mié. 9/17

5:45 pm-8:30 pm

1 stop19h 45m

$970

PortlandSydney

PDX - SYD

PDXSYD

Portland

jue. 10/9

7:20 am-6:05 am

2 stops28h 45m

Sydney Kingsford Smith

jue. 10/16

10:20 am-11:01 pm

1 stop30h 41m

$984

PortlandSydney

PDX - SYD

PDXSYD

Portland

mar. 9/23

1:45 pm-6:55 am

1 stop24h 10m

Sydney Kingsford Smith

lun. 9/29

10:20 am-10:14 am

1 stop16h 54m

$987

PortlandSydney

PDX - SYD

PDXSYD

Portland

dom. 9/21

7:35 pm-6:55 am

1 stop18h 20m

Sydney Kingsford Smith

lun. 9/29

10:20 am-10:14 am

1 stop16h 54m

$987

PortlandSydney

PDX - SYD

PDXSYD

Portland

mar. 9/23

5:00 am-7:00 am

2 stops33h 00m

Sydney Kingsford Smith

mar. 9/30

10:20 am-10:14 am

1 stop16h 54m

$991

PortlandSydney

PDX - SYD

PDXSYD

Portland

mié. 9/24

1:40 pm-6:35 am

2 stops23h 55m

Sydney Kingsford Smith

dom. 9/28

9:25 am-2:52 pm

2 stops22h 27m

$992

PortlandSydney

PDX - SYD

PDXSYD

Portland

lun. 9/22

1:40 pm-6:35 am

2 stops23h 55m

Sydney Kingsford Smith

dom. 9/28

9:25 am-2:52 pm

2 stops22h 27m

$992

PortlandSydney

PDX - SYD

PDXSYD

Portland

mar. 9/23

9:17 am-6:35 am

2 stops28h 18m

Sydney Kingsford Smith

mar. 9/30

9:25 am-2:52 pm

2 stops22h 27m

$992

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 17 results
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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 August 29, 2025.

Booking 88 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 $1,035). Flying from Portland to Sydney in December is currently the most expensive (average of $1,626). 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.

What is the cheapest time of day to fly from PDX to SYD?

Find hourly flight availability from Portland to Sydney. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated septiembre 11, 2025.

A simple way to save on the total cost of your ticket is to fly from Portland to Sydney in the morning. If you’re flexible enough to do this you can expect to save up to 7% on your trip compared to booking a flight at noon.

What is the cheapest day to fly from Portland to Sydney?

Use this chart to determine the cheapest time to fly round-trip from Portland to Sydney. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Portland to Sydney flight should consider departing on Saturday mornings when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 septiembre 11, 2025.
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
10,000 reviews

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
8.0
Very good
7,960 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Hawaiian Airlines
7.8
Good
2,723 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
United Airlines
7.4
Good
8,937 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Air Canada
7.1
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

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 $962, Qantas Airways can have you in Sydney from Portland in 22h 42m. 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?

    Hawaiian Airlines, at $550, was found to be the cheapest airline from Portland to Sydney.Alternate airlines to your destination round-trip include Delta and Air Canada. Hawaiian Airlines is 51% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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 $58 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 $1,035). Flying from Portland to Sydney in December is currently the most expensive (average of $1,626). 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
Coogee

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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.
Medford to Sydney flights
Boise to Sydney flights
Eugene to Sydney flights
Redmond to Sydney flights
Portland to Coolangatta 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 septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$550Average$1,158FlexibilityNo cancel feeOn-time85%
DeltaCheapest$610Average$1,068FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$842Average$1,074FlexibilityNo cancel feeOn-time67%
Qantas AirwaysCheapest$898Average$1,345FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$912Average$1,081FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$954Average$1,052FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$1,099Average$1,240FlexibilityNo cancel feeOn-time75%

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