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Cheap flights from Portland to Sydney from $746

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to Sydney departing on 13/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Cheap return flights

Air Canada Logo
19:40 - 07:20PDX-SYD
18h 40m1 stop
Air Canada Logo
09:20 - 18:46SYD-PDX
26h 26m1 stop
$1,390Air Canada
Find Deal
Tue, 23 Sep - Tue, 30 Sep
Air Canada Logo
19:40 - 07:20PDX-SYD
18h 40m1 stop
Air Canada Logo
09:20 - 14:46SYD-PDX
22h 26m1 stop
$1,392Air Canada
Find Deal
Tue, 23 Sep - Tue, 30 Sep
Air Canada Logo
15:25 - 07:20PDX-SYD
22h 55m1 stop
Air Canada Logo
07:30 - 14:46SYD-PDX
24h 16m2 stops
$1,415Air Canada
Find Deal
Tue, 23 Sep - Tue, 30 Sep
Alaska Airlines Logo
07:40 - 19:45PDX-SYD
19h 05m1 stop
Alaska Airlines Logo
21:40 - 06:00SYD-PDX
25h 20m1 stop
$1,475Alaska Airlines
Find Deal
Mon, 8 Sep - Sun, 14 Sep
Logo
19:40 - 11:25PDX-SYD
22h 45m2 stops
Logo
07:30 - 14:46SYD-PDX
24h 16m2 stops
$1,484
Find Deal
Tue, 23 Sep - Tue, 30 Sep
Alaska Airlines Logo
07:40 - 19:45PDX-SYD
19h 05m1 stop
Alaska Airlines Logo
21:40 - 05:58SYD-PDX
25h 18m2 stops
$1,488Alaska Airlines
Find Deal
Mon, 8 Sep - Tue, 16 Sep
Delta Logo
13:20 - 06:35PDX-SYD
24h 15m2 stops
Delta Logo
09:25 - 11:45SYD-PDX
19h 20m1 stop
$1,494Delta
Find Deal
Mon, 22 Sep - Sun, 28 Sep
United Airlines Logo
15:44 - 06:55PDX-SYD
22h 11m1 stop
United Airlines Logo
09:30 - 17:21SYD-PDX
24h 51m2 stops
$1,498United Airlines
Find Deal
Tue, 9 Sep - Sun, 14 Sep
United Airlines Logo
17:40 - 06:55PDX-SYD
20h 15m1 stop
United Airlines Logo
09:30 - 15:05SYD-PDX
22h 35m2 stops
$1,505United Airlines
Find Deal
Mon, 8 Sep - Tue, 16 Sep
Delta Logo
12:40 - 06:35PDX-SYD
24h 55m1 stop
Delta Logo
09:25 - 18:57SYD-PDX
26h 32m1 stop
$1,511Delta
Find Deal
Mon, 22 Sep - Mon, 29 Sep

Air Canada flights from Portland to Sydney

Our best Air Canada deals on Portland to Sydney flight tickets
Air Canada
23 Sept
PDX19:40Portland
18h 40m
1 stop
SYD07:20Sydney Kingsford Smith
30 Sept
SYD09:20Sydney Kingsford Smith
26h 26m
1 stop
PDX18:46Portland
$1,390
Find similar
Air Canada
23 Sept
PDX19:40Portland
18h 40m
1 stop
SYD07:20Sydney Kingsford Smith
30 Sept
SYD09:20Sydney Kingsford Smith
22h 26m
1 stop
PDX14:46Portland
$1,392
Find similar
Air Canada
31 Aug
PDX06:15Portland
32h 05m
1 stop
SYD07:20Sydney Kingsford Smith
14 Sept
SYD09:20Sydney Kingsford Smith
17h 01m
1 stop
PDX09:21Portland
$1,399
Find similar

Delta flights from Portland to Sydney

Our best Delta deals on Portland to Sydney flight tickets
Delta
22 Sept
PDX13:20Portland
24h 15m
2 stops
SYD06:35Sydney Kingsford Smith
28 Sept
SYD09:25Sydney Kingsford Smith
19h 20m
1 stop
PDX11:45Portland
$1,494
Find similar
Delta
22 Sept
PDX12:40Portland
24h 55m
1 stop
SYD06:35Sydney Kingsford Smith
29 Sept
SYD09:25Sydney Kingsford Smith
26h 32m
1 stop
PDX18:57Portland
$1,511
Find similar
Delta
2 Sept
PDX05:35Portland
32h 00m
2 stops
SYD06:35Sydney Kingsford Smith
23 Sept
SYD09:25Sydney Kingsford Smith
22h 27m
2 stops
PDX14:52Portland
$1,517
Find similar

momondo Fare Finder

 
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, momondo users made 78,305 searches. Data last updated 29 August 2025.
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

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 23/9

19:40-07:20

1 stop18h 40m

Sydney Kingsford Smith

Tue 30/9

09:20-18:46

1 stop26h 26m

$1,390

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 23/9

19:40-07:20

1 stop18h 40m

Sydney Kingsford Smith

Tue 30/9

09:20-14:46

1 stop22h 26m

$1,392

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 23/9

15:25-07:20

1 stop22h 55m

Sydney Kingsford Smith

Tue 30/9

07:30-14:46

2 stops24h 16m

$1,415

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 8/9

07:40-19:45

1 stop19h 05m

Sydney Kingsford Smith

Sun 14/9

21:40-06:00

1 stop25h 20m

$1,475

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 23/9

19:40-11:25

2 stops22h 45m

Sydney Kingsford Smith

Tue 30/9

07:30-14:46

2 stops24h 16m

$1,484

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 8/9

07:40-19:45

1 stop19h 05m

Sydney Kingsford Smith

Tue 16/9

21:40-05:58

2 stops25h 18m

$1,488

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 22/9

13:20-06:35

2 stops24h 15m

Sydney Kingsford Smith

Sun 28/9

09:25-11:45

1 stop19h 20m

$1,494

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 9/9

15:44-06:55

1 stop22h 11m

Sydney Kingsford Smith

Sun 14/9

09:30-17:21

2 stops24h 51m

$1,498

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 8/9

17:40-06:55

1 stop20h 15m

Sydney Kingsford Smith

Tue 16/9

09:30-15:05

2 stops22h 35m

$1,505

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 22/9

12:40-06:35

1 stop24h 55m

Sydney Kingsford Smith

Mon 29/9

09:25-18:57

1 stop26h 32m

$1,511

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Sydney from

How to get the cheapest flight ticket from Portland to Sydney

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Sydney?

The month of September is, on average, the cheapest month to fly to Sydney from Portland, with most prices found around $1,531. If you aren’t able to travel to Sydney during the month of September, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $1,603.

What is the cheapest day to depart on your flight to Sydney?

Our data shows that Wednesday is the least expensive day to fly to Sydney. Tickets to fly out on this day can be as low as $1,240. The most expensive day to fly to Sydney is Sunday, with ticket prices averaging around $2,014.

What is the cheapest time of day to depart on your flight to Sydney?

According to our data, the cheapest time of day to fly to Sydney is in the morning. momondo users have found flights departing from Portland to Sydney in the morning for as low as $1,393. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,806 on average. Flights to Sydney from Portland in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

How far in advance should I book a flight to Sydney?

You are more likely to see cheaper flights to Sydney from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $1,747 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Portland for as low as $1,534 on momondo.

Can stopping save me money on Portland to Sydney flights?

You could potentially save up to 34% on your flight if you consider stops on a Portland to Sydney flight.

How have Portland to Sydney flight prices changed over time?

As of August 2025, prices for Portland to Sydney flights are approximately 26% cheaper when compared to flights at the same time last year.

When to book flights from Portland to Sydney

Are you open to changing your travel dates? Check out the ideal times to fly from Portland to Sydney according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Portland to Sydney (PDX to SYD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland to Sydney

Direct flights

None
There are no direct flights from Portland to Sydney. There are no popular flight routes from Portland to Sydney.
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  • How far is Portland to Sydney Kingsford Smith by plane?

    There are 12333.8 km between Portland and Sydney Kingsford Smith. By plane, this route typically takes 17h 36m.

  • When did momondo last update prices for flights from Portland Airport to Sydney Kingsford Smith Airport?

    Prices for flights from Portland Airport to Sydney Kingsford Smith Airport are updated daily.

  • How many operators does momondo search for flights from Portland Airport to Sydney Kingsford Smith Airport?

  • How old do you have to be to fly from Portland Airport to Sydney Kingsford Smith Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Portland Airport to Sydney Kingsford Smith Airport.

  • What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?

    The travel and health documents you'll need for your trip to Sydney Kingsford Smith Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at Sydney Kingsford Smith Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Portland to Sydney?

Best airlines flying from Portland to Sydney

Compare and see reviews for airlines that fly from Portland to Sydney with momondo
Airline
Rating
Free cancellation
Price
United AirlinesPriceFrom $1,274Free cancellationRating
7.4
8,941 reviews
Search United Airlines flights

Travelling to a place near Sydney?

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

Why use momondo?

Why should I use momondo to find a flight deal from Portland to Sydney?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Portland to Sydney . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Portland to Sydney with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Sydney from Portland with this policy.

How can momondo help me find flights from Portland to Sydney?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Sydney from Portland.

I’m not ready to book a flight from Portland to Sydney right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Portland to Sydney flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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