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Cheap flights from Portland to Sydney from $570

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 11/2. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Portland to Sydney

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:00 am - 6:50 pmPDX  Portland-SYD Sydney Kingsford Smith
17h 50m1 stop Honolulu
Multiple Airlines Logo
1:15 pm - 10:07 amSYD  Sydney Kingsford Smith-PDX Portland
37h 52m2 stops Nadi Los Angeles
$1,080Multiple Airlines
Wed, Sep 2 - Wed, Sep 9
Alaska Airlines Logo
8:00 am - 7:45 pmPDX  Portland-SYD Sydney Kingsford Smith
17h 45m1 stop Honolulu
Alaska Airlines Logo
9:40 pm - 8:49 pmSYD  Sydney Kingsford Smith-PDX Portland
18h 09m1 stop Honolulu
$1,084Alaska Airlines
Mon, Oct 26 - Tue, Nov 24
Air Canada Logo
7:45 pm - 7:20 amPDX  Portland-SYD Sydney Kingsford Smith
18h 35m1 stop Vancouver Intl
Air Canada Logo
9:20 am - 9:31 amSYD  Sydney Kingsford Smith-PDX Portland
17h 11m1 stop Vancouver Intl
$1,118Air Canada
Mon, Sep 14 - Tue, Sep 29
Air Canada Logo
7:10 pm - 9:35 amPDX  Portland-SYD Sydney Kingsford Smith
19h 25m1 stop Vancouver Intl
Air Canada Logo
11:20 am - 9:26 amSYD  Sydney Kingsford Smith-PDX Portland
17h 06m1 stop Vancouver Intl
$1,118Air Canada
Wed, Nov 18 - Sun, Nov 29
Qantas Airways Logo
2:30 pm - 6:25 amPDX  Portland-SYD Sydney Kingsford Smith
20h 55m1 stop San Francisco
Qantas Airways Logo
10:20 am - 1:26 pmSYD  Sydney Kingsford Smith-PDX Portland
22h 06m2 stops Brisbane Los Angeles
$1,146Qantas Airways
Fri, Jan 29 - Mon, Feb 8
Qantas Airways Logo
2:30 pm - 6:25 amPDX  Portland-SYD Sydney Kingsford Smith
20h 55m1 stop San Francisco
Qantas Airways Logo
11:05 am - 1:26 pmSYD  Sydney Kingsford Smith-PDX Portland
21h 21m2 stops Brisbane Los Angeles
$1,147Qantas Airways
Fri, Jan 29 - Mon, Feb 8
United Airlines Logo
3:23 pm - 7:55 amPDX  Portland-SYD Sydney Kingsford Smith
22h 32m1 stop San Francisco
United Airlines Logo
9:15 am - 12:13 pmSYD  Sydney Kingsford Smith-PDX Portland
21h 58m1 stop Houston George Bush Intcntl
$1,308United Airlines
Mon, Oct 19 - Wed, Nov 25
United Airlines Logo
10:59 am - 9:20 amPDX  Portland-SYD Sydney Kingsford Smith
28h 21m1 stop San Francisco
United Airlines Logo
11:50 am - 2:37 pmSYD  Sydney Kingsford Smith-PDX Portland
21h 47m1 stop San Francisco
$1,308United Airlines
Sun, Oct 25 - Mon, Nov 23
Delta Logo
10:56 am - 7:50 amPDX  Portland-SYD Sydney Kingsford Smith
26h 54m1 stop Los Angeles
Delta Logo
9:40 am - 6:47 pmSYD  Sydney Kingsford Smith-PDX Portland
27h 07m1 stop Los Angeles
$1,308Delta
Sun, Oct 18 - Mon, Oct 26
Delta Logo
5:15 pm - 7:50 amPDX  Portland-SYD Sydney Kingsford Smith
20h 35m1 stop Los Angeles
Delta Logo
10:40 am - 6:56 pmSYD  Sydney Kingsford Smith-PDX Portland
27h 16m1 stop Los Angeles
$1,308Delta
Wed, Oct 21 - Mon, Nov 23

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Alaska Airlines flights from Portland to Sydney

Our best Alaska Airlines deals on Portland to Sydney flight tickets
Alaska Airlines
Aug 17
PDX7:46 amPortland
18h 04m
1 stop
SYD6:50 pmSydney Kingsford Smith
Aug 30
SYD8:45 pmSydney Kingsford Smith
26h 29m
1 stop
PDX6:14 amPortland
$1,038
Alaska Airlines
Oct 26
PDX8:00 amPortland
17h 45m
1 stop
SYD7:45 pmSydney Kingsford Smith
Nov 24
SYD9:40 pmSydney Kingsford Smith
18h 09m
1 stop
PDX8:49 pmPortland
$1,084
Alaska Airlines
Aug 17
PDX7:46 amPortland
18h 04m
1 stop
SYD6:50 pmSydney Kingsford Smith
Aug 23
SYD8:45 pmSydney Kingsford Smith
26h 29m
1 stop
PDX6:14 amPortland
$1,085

Air New Zealand flights from Portland to Sydney

Our best Air New Zealand deals on Portland to Sydney flight tickets
Air New Zealand
Nov 15
PDX9:00 amPortland
28h 35m
2 stops
SYD8:35 amSydney Kingsford Smith
Nov 24
SYD7:25 pmSydney Kingsford Smith
48h 19m
2 stops
PDX12:44 amPortland
$1,159
Air New Zealand
Aug 22
PDX8:18 pmPortland
43h 27m
2 stops
SYD8:45 amSydney Kingsford Smith
Oct 3
SYD6:20 pmSydney Kingsford Smith
43h 13m
2 stops
PDX8:33 pmPortland
$1,205
Air New Zealand
Aug 22
PDX8:18 pmPortland
43h 27m
2 stops
SYD8:45 amSydney Kingsford Smith
Oct 3
SYD6:20 pmSydney Kingsford Smith
43h 13m
2 stops
PDX8:33 pmPortland
$1,206

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 August 8, 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 Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Wed 9/2

8:00 am-6:50 pm

1 stop17h 50m

Sydney Kingsford Smith

Wed 9/9

1:15 pm-10:07 am

2 stops37h 52m

$1,080

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Mon 10/26

8:00 am-7:45 pm

1 stop17h 45m

Sydney Kingsford Smith

Tue 11/24

9:40 pm-8:49 pm

1 stop18h 09m

$1,084
Quickest round-trip

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Mon 9/14

7:45 pm-7:20 am

1 stop18h 35m

Sydney Kingsford Smith

Tue 9/29

9:20 am-9:31 am

1 stop17h 11m

$1,118

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Wed 11/18

7:10 pm-9:35 am

1 stop19h 25m

Sydney Kingsford Smith

Sun 11/29

11:20 am-9:26 am

1 stop17h 06m

$1,118

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Fri 1/29

2:30 pm-6:25 am

1 stop20h 55m

Sydney Kingsford Smith

Mon 2/8

10:20 am-1:26 pm

2 stops22h 06m

$1,146

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Fri 1/29

2:30 pm-6:25 am

1 stop20h 55m

Sydney Kingsford Smith

Mon 2/8

11:05 am-1:26 pm

2 stops21h 21m

$1,147

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Mon 10/19

3:23 pm-7:55 am

1 stop22h 32m

Sydney Kingsford Smith

Wed 11/25

9:15 am-12:13 pm

1 stop21h 58m

$1,308

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Sun 10/25

10:59 am-9:20 am

1 stop28h 21m

Sydney Kingsford Smith

Mon 11/23

11:50 am-2:37 pm

1 stop21h 47m

$1,308

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Sun 10/18

10:56 am-7:50 am

1 stop26h 54m

Sydney Kingsford Smith

Mon 10/26

9:40 am-6:47 pm

1 stop27h 07m

$1,308

PortlandSydney

PDX Portland - SYD Sydney Kingsford Smith

PDXSYD

Portland

Wed 10/21

5:15 pm-7:50 am

1 stop20h 35m

Sydney Kingsford Smith

Mon 11/23

10:40 am-6:56 pm

1 stop27h 16m

$1,308

Flights are sorted by cheapest round-trip 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 typical price of a round-trip flight between Portland and Sydney?

Prices are currently low for flights on this route.

Typical prices usually range from $1,154 to $1,250.
The lowest price recently found on this route was $1,080.

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 $1,070. If you are unable to visit Sydney during the month of September, then departing from Portland during the month June is also very affordable. Most momondo users find prices during this month for around $1,117.

How far in advance should I book a flight from Portland 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 $1,222 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 $1,023 on momondo.

Can stopping save me money on Portland to Sydney flights?

You could potentially save up to 3% on your flight if you consider stops on a Portland to Sydney flight.

How have Portland to Sydney flight prices changed over time?

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

17h 45m

Direct flights

None
The fastest flight from Portland to Sydney takes 17h 45m
There are no direct flights from Portland to Sydney. There are no popular flight routes from Portland to Sydney.
Search flight deals

Frequently asked questions about flying from Portland to Sydney

  • 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 17h 45m.

  • 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 $497Free CancellationRating
7.8
8,500 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom $550Free CancellationRating
7.8
2,818 reviews
Search Hawaiian Airlines flights
Air CanadaPriceFrom $886Free CancellationRating
7.1
11,455 reviews
Search Air Canada flights
American AirlinesPriceFrom $954Free CancellationRating
7.1
11,894 reviews
Search American Airlines flights
United AirlinesPriceFrom $968Free CancellationRating
7.4
10,089 reviews
Search United Airlines flights
Qantas AirwaysPriceFrom $970Free CancellationRating
7.5
1,079 reviews
Search Qantas Airways flights
Alaska AirlinesPriceFrom $999Free CancellationRating
7.9
12,786 reviews
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
Wollongong
Penrith
Katoomba
Leura
Cronulla
Randwick
Manly
Lithgow
Coogee
Terrigal
Charlestown
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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