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Cheap flights from Portland to Sydney from $671

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 1/3. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
26 Feb — 5 Mar1
1 adult

The best prices from Portland to Sydney Kingsford Smith are usually found in February or November, booked 23 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

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 21 February 2025.

Round-trip from

$1,442

One-way from

$671

Popular in

December

Cheapest in

February

Average price

$1,629
United Airlines
  • United Airlines
  • 10/3-16/3
  • 3 total stops
  • 60h 40m total
  • Portland to Sydney
Search Deals
American Airlines
  • American Airlines
  • 1/3
  • 1 total stop
  • 22h 17m total
  • Portland to Sydney
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($399 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($94 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 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 21 February 2025.

Mon 10/307:00PDX - SYD
2 stops30h 00mUnited Airlines
Sun 16/312:10SYD - PDX
1 stop30h 40mUnited Airlines
Deal found 20/2$1,442
Fri 12/917:10PDX - SYD
1 stop20h 25mDelta
Fri 26/909:25SYD - PDX
1 stop26h 51mDelta
Deal found 21/2$1,447
Sat 8/319:05PDX - SYD
2 stops32h 20mAir Canada
Mon 17/307:30SYD - PDX
2 stops25h 14mAir Canada
Deal found 20/2$1,453
Sat 14/619:40PDX - SYD
2 stops28h 00mMultiple Airlines
Sun 22/607:00SYD - PDX
2 stops19h 35mMultiple Airlines
Deal found 20/2$1,483
Sun 9/318:27PDX - SYD
1 stop20h 33mAlaska Airlines
Wed 9/409:10SYD - PDX
1 stop19h 20mAlaska Airlines
Deal found 21/2$1,723
Tue 12/813:26PDX - SYD
2 stops28h 09mAir New Zealand
Mon 25/809:55SYD - PDX
2 stops25h 41mAir New Zealand
Deal found 20/2$1,758
Sat 17/517:30PDX - SYD
1 stop20h 35mQantas Airways
Fri 30/517:45SYD - PDX
1 stop23h 11mQantas Airways
Deal found 20/2$2,135
Thu 14/817:30PDX - SYD
2 stops25h 45mFiji Airways
Wed 20/813:15SYD - PDX
2 stops24h 49mFiji Airways
Deal found 20/2$2,494

Find flights from Portland to Sydney within your budget

Customise 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 647,157 searches. Data last updated 21 February 2025.

Fly from

Portland

Fly to

Sydney

Route

Depart

Return

Price

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 10/3

07:00-07:00

2 stops30h 00m

Sydney Kingsford Smith

Sun 16/3

12:10-00:50

1 stop30h 40m

$1,442

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sat 8/3

19:05-22:25

2 stops32h 20m

Sydney Kingsford Smith

Tue 18/3

07:30-09:34

2 stops20h 04m

$1,453

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 4/3

16:20-06:50

1 stop19h 30m

Sydney Kingsford Smith

Thu 13/3

13:15-18:46

2 stops23h 31m

$1,455

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sat 14/6

19:40-16:40

2 stops28h 00m

Sydney Kingsford Smith

Sun 22/6

07:00-09:35

2 stops19h 35m

$1,483

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 12/8

13:26-10:35

2 stops28h 09m

Sydney Kingsford Smith

Mon 25/8

09:55-18:36

2 stops25h 41m

$1,758

PortlandSydney

PDX - SYD

PDXSYD

Portland

Thu 20/3

18:07-19:45

1 stop31h 38m

Sydney Kingsford Smith

Sun 30/3

21:40-05:05

1 stop25h 25m

$1,841

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sat 17/5

17:30-07:05

1 stop20h 35m

Sydney Kingsford Smith

Fri 30/5

17:45-23:56

1 stop23h 11m

$2,135

PortlandSydney

PDX - SYD

PDXSYD

Portland

Thu 14/8

17:30-12:15

2 stops25h 45m

Sydney Kingsford Smith

Wed 20/8

13:15-21:04

2 stops24h 49m

$2,494

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sun 9/3

18:27-20:50

2 stops32h 23m

Sydney Kingsford Smith

Wed 9/4

21:50-18:11

2 stops37h 21m

$2,593

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sat 1/3

15:43-09:00

1 stop22h 17m

$671

Flights are sorted by cheapest return flights first.

Deals found on 21/2

Showing 1-10 of 22 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 return 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.

Travel insights for flights from Portland to Sydney

Get recent, data-driven insights about flights from Portland to Sydney including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a return flight from Portland to Sydney. Price data was last updated on 14 February 2025.

The best time to book flights from Portland to Sydney is 23 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, May is the cheapest month in which you can book a flight from Portland to Sydney (average of $129). Flying from Portland to Sydney in October is currently the most expensive (average of $171). 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 21 February 2025.

One of the essential ways to save on airfare from Portland to Sydney is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the morning could potentially save you up to 23% on airfare.

Rainfall in Sydney by month

Plan your trip to Sydney by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Sydney ranges from 50.0 - 130.0 inches per month. March is typically the wettest month, when rainfall can reach 130.0 mm. September is typically the driest time to visit Sydney when rainfall is around 50.0 mm.

Temperature in Sydney by month

Plan your trip to Sydney by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Sydney, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 22.0 C. Travellers hoping to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 11.0 C).

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 21 February 2025.
To help decide which airline to fly from Portland to Sydney, see what other customers have to say about Air Tahiti Nui, Singapore Airlines and Fiji Airways. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Crew

9.1

Overall

8.7

Boarding

8.7

Comfort

8.0

Entertainment

7.2

Food

7.8

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Air Tahiti Nui
8.7
Very Good
61 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Crew

9.1

Overall

8.7

Boarding

8.7

Comfort

8.0

Entertainment

7.2

Food

7.8

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Singapore Airlines
8.1
Very Good
1,299 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Crew

9.1

Overall

8.7

Boarding

8.7

Comfort

8.0

Entertainment

7.2

Food

7.8

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Fiji Airways
8.0
Very Good
184 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Crew

9.1

Overall

8.7

Boarding

8.7

Comfort

8.0

Entertainment

7.2

Food

7.8

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Delta
8.0
Very Good
8,213 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Crew

9.1

Overall

8.7

Boarding

8.7

Comfort

8.0

Entertainment

7.2

Food

7.8

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Alaska Airlines
8.0
Very Good
9,697 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Crew

9.1

Overall

8.7

Boarding

8.7

Comfort

8.0

Entertainment

7.2

Food

7.8

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

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.

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

    Cheapflights users have booked flights from Portland to Sydney round-trip from $1,442. Other airlines that can offer you cheap pricing are Air Canada, from $1,453, and Delta, from $1,455. You may be able to fly from Portland to Sydney for 21% less than the average price by searching for these airlines.

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

    One-way options have recently been found by users for as low as $671 on American Airlines. Other airlines that offer cheap prices include United Airlines from $676 and Alaska Airlines from $828 one-way.

  • 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 holiday 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, May is the cheapest month in which you can book a flight from Portland to Sydney (average of $129). Flying from Portland to Sydney in October is currently the most expensive (average of $171). 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

Travelling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
Parramatta
Wollongong
Katoomba
Randwick
Manly
Penrith
Coogee
Cronulla
Terrigal
Bondi Beach
Lithgow
Leura
Swansea

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
Eugene to Sydney flights
Portland to Coolangatta flights

Top airline flying from Portland to Sydney

Discover the top airline 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 647,157 searches. Data last updated 21 February 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,177Average$1,825FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Portland to Sydney?

Deals for Portland to Sydney flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Portland to Sydney?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Portland to Sydney.

Can Cheapflights find flights from Portland to Sydney with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Portland to Sydney flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Portland to Sydney become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Sydney from Portland today and book when prices fit your budget.

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