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Cheap flights from Portland to Sydney from $469

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 4/8. 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
1 adult, Economy, 0 bags

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Find the cheapest flights from Portland to Sydney

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
7:45 pm - 7:20 am
PDX
-
SYD
18h 35m
1 stop
Air Canada Logo
9:20 am - 2:45 pm
SYD
-
PDX
22h 25m
1 stop
$996Air Canada
Mon, May 25 - Tue, Jun 2
Air Canada Logo
3:30 pm - 7:20 am
PDX
-
SYD
22h 50m
1 stop
Air Canada Logo
9:20 am - 9:31 am
SYD
-
PDX
17h 11m
1 stop
$997Air Canada
Mon, Jul 6 - Sun, Jul 26
Air Canada Logo
9:50 am - 7:20 am
PDX
-
SYD
28h 30m
1 stop
Air Canada Logo
9:20 am - 2:45 pm
SYD
-
PDX
22h 25m
1 stop
$1,003Air Canada
Mon, Apr 13 - Wed, May 13
Air Canada Logo
3:30 pm - 7:20 am
PDX
-
SYD
22h 50m
1 stop
Air Canada Logo
9:20 am - 9:30 am
SYD
-
PDX
17h 10m
1 stop
$1,005Air Canada
Tue, May 5 - Tue, May 12
Air Canada Logo
3:15 pm - 7:20 am
PDX
-
SYD
23h 05m
1 stop
Air Canada Logo
9:20 am - 2:45 pm
SYD
-
PDX
22h 25m
1 stop
$1,006Air Canada
Mon, Apr 27 - Wed, May 6
Air Canada Logo
3:30 pm - 7:20 am
PDX
-
SYD
22h 50m
1 stop
Air Canada Logo
9:20 am - 9:30 am
SYD
-
PDX
17h 10m
1 stop
$1,007Air Canada
Mon, May 4 - Mon, May 11
Air Canada Logo
9:50 am - 7:20 am
PDX
-
SYD
28h 30m
1 stop
Air Canada Logo
9:20 am - 9:30 am
SYD
-
PDX
17h 10m
1 stop
$1,015Air Canada
Mon, Apr 20 - Wed, May 27
Multiple Airlines Logo
7:45 pm - 7:20 am
PDX
-
SYD
18h 35m
1 stop
Multiple Airlines Logo
6:00 am - 9:31 am
SYD
-
PDX
20h 31m
2 stops
$1,016Multiple Airlines
Mon, Jul 6 - Sun, Jul 26
Multiple Airlines Logo
3:30 pm - 7:20 am
PDX
-
SYD
22h 50m
1 stop
Multiple Airlines Logo
6:00 am - 2:45 pm
SYD
-
PDX
25h 45m
2 stops
$1,017Multiple Airlines
Sun, May 10 - Sun, May 17
Air Canada Logo
7:45 pm - 7:20 am
PDX
-
SYD
18h 35m
1 stop
Air Canada Logo
7:30 am - 9:31 am
SYD
-
PDX
19h 01m
2 stops
$1,022Air Canada
Mon, Jun 22 - Tue, Jul 21

Air Canada flights from Portland to Sydney

Our best Air Canada deals on Portland to Sydney flight tickets
Air Canada
May 25
PDX7:45 pmPortland
18h 35m
1 stop
SYD7:20 amSydney Kingsford Smith
Jun 2
SYD9:20 amSydney Kingsford Smith
22h 25m
1 stop
PDX2:45 pmPortland
$996
Air Canada
Jul 6
PDX3:30 pmPortland
22h 50m
1 stop
SYD7:20 amSydney Kingsford Smith
Jul 26
SYD9:20 amSydney Kingsford Smith
17h 11m
1 stop
PDX9:31 amPortland
$997
Air Canada
Apr 13
PDX9:50 amPortland
28h 30m
1 stop
SYD7:20 amSydney Kingsford Smith
May 13
SYD9:20 amSydney Kingsford Smith
22h 25m
1 stop
PDX2:45 pmPortland
$1,003

Qantas Airways flights from Portland to Sydney

Our best Qantas Airways deals on Portland to Sydney flight tickets
Qantas Airways
Apr 3
PDX2:35 pmPortland
22h 50m
1 stop
SYD7:25 amSydney Kingsford Smith
Apr 15
SYD6:45 pmSydney Kingsford Smith
35h 52m
2 stops
PDX1:37 pmPortland
$1,115
Qantas Airways
Apr 3
PDX2:35 pmPortland
22h 50m
1 stop
SYD7:25 amSydney Kingsford Smith
Apr 15
SYD6:30 pmSydney Kingsford Smith
36h 07m
2 stops
PDX1:37 pmPortland
$1,152
Qantas Airways
Apr 4
PDX5:38 pmPortland
20h 27m
1 stop
SYD7:05 amSydney Kingsford Smith
Apr 10
SYD9:25 pmSydney Kingsford Smith
19h 29m
1 stop
PDX11:54 pmPortland
$1,307

momondo 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, momondo users made 832,500 searches. Data last updated March 25, 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 5/25

7:45 pm-7:20 am

1 stop18h 35m

Sydney Kingsford Smith

Tue 6/2

9:20 am-2:45 pm

1 stop22h 25m

$996

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 7/6

3:30 pm-7:20 am

1 stop22h 50m

Sydney Kingsford Smith

Sun 7/26

9:20 am-9:31 am

1 stop17h 11m

$997

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 4/13

9:50 am-7:20 am

1 stop28h 30m

Sydney Kingsford Smith

Wed 5/13

9:20 am-2:45 pm

1 stop22h 25m

$1,003

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 5/5

3:30 pm-7:20 am

1 stop22h 50m

Sydney Kingsford Smith

Tue 5/12

9:20 am-9:30 am

1 stop17h 10m

$1,005

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 4/27

3:15 pm-7:20 am

1 stop23h 05m

Sydney Kingsford Smith

Wed 5/6

9:20 am-2:45 pm

1 stop22h 25m

$1,006

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 5/4

3:30 pm-7:20 am

1 stop22h 50m

Sydney Kingsford Smith

Mon 5/11

9:20 am-9:30 am

1 stop17h 10m

$1,007

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 4/20

9:50 am-7:20 am

1 stop28h 30m

Sydney Kingsford Smith

Wed 5/27

9:20 am-9:30 am

1 stop17h 10m

$1,015

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 7/6

7:45 pm-7:20 am

1 stop18h 35m

Sydney Kingsford Smith

Sun 7/26

6:00 am-9:31 am

2 stops20h 31m

$1,016

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sun 5/10

3:30 pm-7:20 am

1 stop22h 50m

Sydney Kingsford Smith

Sun 5/17

6:00 am-2:45 pm

2 stops25h 45m

$1,017
Quickest round-trip

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 6/22

7:45 pm-7:20 am

1 stop18h 35m

Sydney Kingsford Smith

Tue 7/21

7:30 am-9:31 am

2 stops19h 01m

$1,022

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 typical price of a round-trip flight between Portland and Sydney?

What is the cheapest month to fly to Sydney?

In general, September is the cheapest month to fly from Portland to Sydney. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,001. If you are unable to visit Sydney during the month of September, then departing from Portland during the month October is also very affordable. Most momondo users find prices during this month for around $1,137.

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 $1,221 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Portland for as low as $895 on momondo.

Can stopping save me money on Portland to Sydney flights?

You could potentially save up to 19% 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 March 2026, prices for Portland to Sydney flights are approximately 1% 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 round-trip 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

Fastest flight time

18h 35m

Direct flights

None
The fastest flight from Portland to Sydney takes 18h 35m
There are no direct flights from Portland to Sydney. There are no popular flight routes from Portland to Sydney.
Search flight deals

  • How far is Portland to Sydney Kingsford Smith by plane?

    A flight from Portland to Sydney Kingsford Smith will travel around 7663.9 mi. A reasonable flight in good conditions will take 18h 35m.

  • 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 a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to 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 required for your trip to Sydney Kingsford Smith Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Sydney Kingsford Smith Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • 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
DeltaPriceFrom $229Free CancellationRating
7.9
8,328 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom $550Free CancellationRating
7.8
2,840 reviews
Search Hawaiian Airlines flights
Air CanadaPriceFrom $884Free CancellationRating
7.1
10,841 reviews
Search Air Canada flights
Qantas AirwaysPriceFrom $898Free CancellationRating
7.5
1,010 reviews
Search Qantas Airways flights
American AirlinesPriceFrom $954Free CancellationRating
7.1
11,494 reviews
Search American Airlines flights
United AirlinesPriceFrom $965Free CancellationRating
7.4
9,482 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $999Free CancellationRating
7.9
12,112 reviews
Search Alaska Airlines flights
Alaska AirlinesPriceFrom $1,140Free CancellationRating
0.0
Search Alaska Airlines flights

Traveling to a place near Sydney?

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

Why use momondo?

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

Finding the right flight to Sydney from Portland is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Sydney quick and easy, saving you time and money.

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

Flights from Portland to Sydney with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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?

If you are not ready to book a flight from Portland to Sydney now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Sydney and let you know when they change.

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