PDX - SYD

$810 Find Cheap Flights from Portland to Sydney – Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Portland to Sydney departing on 16/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest return fare
$1,498
Typical prices: $1,662-$1,819
Alaska Airlines
Mon 17/8Sun 30/8
PDX - SYD • 1 stop
Cheapest one-way flight
$810
Typical prices: $814-$884
Alaska Airlines
Wed 16/9
PDX - SYD • 1 stop
Top airlines
Alaska Airlines
Cheapest • from $1,498 (return)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
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Direct flights
Not available
There are currently no direct flights between Portland and Sydney. You’ll need at least 1 connection.
Insights
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Top stopover airports
Los Angeles (LAX)
Cheapest • Avg $1,838 (return)
Honolulu (HNL)
Shortest trip • 17h 45m (one-way)
Insights
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When to book
2 weeks
in advance
Our data shows that travellers who book at least 2 weeks in advance save around 11% compared to booking last minute.
Insights
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Insights
When to travel
September
Cheapest • 13% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Sydney!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Portland to Sydney (PDX-SYD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Portland to Sydney that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Portland to Sydney

Mon, 17 Aug - Sun, 30 Aug
Alaska Airlines Logo
07:46 - 18:50
PDX
-
SYD
18h 04m
1 stop
Alaska Airlines Logo
20:45 - 06:14
SYD
-
PDX
26h 29m
1 stop
$1,498Alaska Airlines
Mon, 26 Oct - Mon, 9 Nov
Air Canada Logo
19:10 - 08:35
PDX
-
SYD
19h 25m
1 stop
Air Canada Logo
11:20 - 14:41
SYD
-
PDX
22h 21m
1 stop
$1,509Air Canada
Tue, 6 Oct - Mon, 19 Oct
Air Canada Logo
19:45 - 08:20
PDX
-
SYD
18h 35m
1 stop
Air Canada Logo
10:20 - 09:31
SYD
-
PDX
17h 11m
1 stop
$1,509Air Canada
Tue, 13 Oct - Wed, 28 Oct
Air Canada Logo
15:30 - 08:20
PDX
-
SYD
22h 50m
1 stop
Air Canada Logo
10:20 - 09:26
SYD
-
PDX
17h 06m
1 stop
$1,509Air Canada
Mon, 2 Nov - Mon, 23 Nov
Air Canada Logo
19:10 - 09:35
PDX
-
SYD
19h 25m
1 stop
Air Canada Logo
11:20 - 14:41
SYD
-
PDX
22h 21m
1 stop
$1,509Air Canada
Mon, 31 Aug - Sun, 13 Sep
Air Canada Logo
15:30 - 07:20
PDX
-
SYD
22h 50m
1 stop
Air Canada Logo
09:20 - 09:31
SYD
-
PDX
17h 11m
1 stop
$1,509Air Canada
Mon, 12 Oct - Tue, 27 Oct
Air Canada Logo
19:45 - 08:20
PDX
-
SYD
18h 35m
1 stop
Air Canada Logo
10:20 - 09:26
SYD
-
PDX
17h 06m
1 stop
$1,517Air Canada
Mon, 17 Aug - Sun, 30 Aug
Alaska Airlines Logo
07:46 - 18:50
PDX
-
SYD
18h 04m
1 stop
Alaska Airlines Logo
20:45 - 06:14
SYD
-
PDX
26h 29m
1 stop
$1,518Alaska Airlines
Wed, 19 Aug - Wed, 2 Sep
United Airlines Logo
11:15 - 06:55
PDX
-
SYD
26h 40m
1 stop
United Airlines Logo
10:20 - 18:19
SYD
-
PDX
24h 59m
1 stop
$1,576United Airlines
Mon, 23 Nov - Mon, 7 Dec
United Airlines Logo
19:26 - 09:20
PDX
-
SYD
18h 54m
1 stop
United Airlines Logo
11:50 - 14:27
SYD
-
PDX
21h 37m
1 stop
$1,576United Airlines
Booking Insights

KAYAK's insights & trends for Portland to Sydney flights

Get data-powered insights and trends into flights from Portland to Sydney to help you find the cheapest flights, the best time to fly and much more.

How much is a return flight from Portland to Sydney?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from Portland to Sydney departing in August.

Flight prices are below average for this route right now.

Flights to Sydney from Portland usually cost between $1,662 and $1,819 in August.
The lowest price found in the past 5 days was $1,498 on Alaska Airlines (17 Aug–30 Aug).

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Portland to Sydney, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Portland to Sydney is September, where tickets cost $1,538 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $2,571 and $1,935 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Portland to Sydney, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Portland to Sydney, you should book around 2 weeks before departure, which saves you about 11% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Find deals

Good to know

Low season

May

Cheapest flight

$810
Best time to beat the crowds (7% less expensive on average)
Most popular time to fly (45% more expensive on average)
Flight from Portland to Sydney

When to book flights from Portland to Sydney

Are your dates flexible? Find out the best times to travel from Portland to Sydney based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Portland to Sydney

  • Do I need a visa to fly from Portland International Airport (PDX) to Sydney Airport (SYD)?

    If you are an American citizen that is flying from Portland International Airport (PDX) to Sydney Airport (SYD), you need to have a valid passport and a visa to enter Australia. The visa is referred to as an Electronic Travel Authority (ETA) and it allows most travelers to stay in the country for up to 90 days.

  • What transportation options are there for going from Sydney Airport (SYD) to downtown Sydney?

    The easiest way to go from Sydney Airport (SYD) to downtown Sydney is by driving. With normal traffic, this will take you around 15 to 20 minutes in total. You can either rent your own car from the airport, grab a local taxi from outside of the Arrivals terminal, or use a ridesharing service.

  • What airline lounges are available at Portland International Airport (PDX)?

    Portland International Airport (PDX) has quite a few lounges for travelers to choose from. You can find the Alaska Airlines Alaska Lounge in Concourse B, as well as in Concourse C. The Delta Air Lines Delta Sky Club is in Concourse D, while the United Airlines United Club is in Concourse E.

  • What is the checked luggage policy for flights from Portland International Airport (PDX) to Sydney Airport (SYD)?

    When you fly Economy from Portland International Airport (PDX) to Sydney Airport (SYD), you will generally be able to check one bag for free. Air Canada has a policy that your suitcase or item cannot weigh more than a maximum of 70 lbs.

  • What is the cheapest flight from Portland to Sydney?

    In the last 5 days, the lowest price for a flight from Portland to Sydney was $810 for a one-way ticket and $1,498 for a return.

  • Which airports will I be using when flying from Portland to Sydney?

    Portland and Sydney are both served by 1 main airport. You will leave Portland from Portland and will be arriving at Sydney Kingsford Smith.

  • Which aircraft models fly most regularly from Portland to Sydney?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Portland to Sydney?

    Star Alliance is the only airline alliance operating flights between Portland and Sydney.

  • How does KAYAK find such low prices on flights from Portland to Sydney?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Portland to Sydney.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Portland to Sydney?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sydney from Portland is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Portland to Sydney?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Sydney with an airline and back to Portland with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Portland to Sydney?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sydney from Portland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Portland to Sydney

  • Travelers have a few different ways how they can go from downtown Portland to Portland International Airport (PDX). When going by car, the trip generally lasts between 10 and 15 minutes. When taking public transportation, like bus line 12 and the MAX Red Line Shuttle, you will arrive in approximately 1 hour.
  • Direct flights from Portland International Airport (PDX) to Sydney Airport (SYD) are not offered, so you will need to have at least one layover. If you are flying with Qantas Airways, you will likely have a layover in Los Angeles. If you are flying with Air Canada, you may have layovers in Vancouver and Brisbane.
  • Those that value sustainability may want to fly from Portland International Airport (PDX) to Sydney Airport (SYD) with Qantas Airways. Qantas Airways prioritizes the environment and has pledged to reduce its carbon emissions by 25% by 2030 and achieve net zero emissions by 2050. It also has been working to remove single-use plastics from its supply chain.
  • Flying from Portland International Airport (PDX) to Sydney Airport (SYD) is quite a long journey, so it may be worth it to upgrade to Premium Economy or Business Class for your comfort. After you have booked an Economy ticket, many airlines will give you the option of upgrading at a discounted rate.
  • To save some money during your trip from Portland International Airport (PDX) to Sydney Airport (SYD), book a Basic Economy ticket. Both Air Canada and United Airlines offer Basic Economy fares, while Fiji Airways has a Saver fare.

Reviews of the top airline flying from Portland to Sydney

 
See real verified KAYAK customer reviews for airlines flying from Portland to Sydney. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Portland to Sydney? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 10046 reviews
8.1Crew
6.6Food
7.3Comfort
7.7Boarding
7.1Entertainment
Airline reviews

The seats were very uncomfortable. I paid for the front economy. i swear they added a row of seats in there. It was so tight, that I could measure the distance between my seat and the one in front from my elbow to the tips of my fingers plus six inches. The seat cushion was completely worn out. The dinner was very good. Thank you for having a vegetarian option as a standard. But breakfast was nothing but sugar. that's not food. The crew was crabby and rude, especially in regards to coming to the back gallery. And the entertainment choice: why would you put violent movies on the choice? the Godfather? Some movies with black women being beaten over the head with clubs? What the heck? You know that when there is a movie on a plane, everyone gets to watch it. Why choose the most violent titles possible? The total number of movies were very limited, and the television, even more so. No games were available on the set. The wellness section was nice, thank you. I appreciated a galley in the middle where I could stand. The seats were unbearable.

4.0 OkayKirstin, July 2026
LAX - SYD
Read more United Airlines reviews

The seats were very uncomfortable. I paid for the front economy. i swear they added a row of seats in there. It was so tight, that I could measure the distance between my seat and the one in front from my elbow to the tips of my fingers plus six inches. The seat cushion was completely worn out. The dinner was very good. Thank you for having a vegetarian option as a standard. But breakfast was nothing but sugar. that's not food. The crew was crabby and rude, especially in regards to coming to the back gallery. And the entertainment choice: why would you put violent movies on the choice? the Godfather? Some movies with black women being beaten over the head with clubs? What the heck? You know that when there is a movie on a plane, everyone gets to watch it. Why choose the most violent titles possible? The total number of movies were very limited, and the television, even more so. No games were available on the set. The wellness section was nice, thank you. I appreciated a galley in the middle where I could stand. The seats were unbearable.

Easy of boarding, helpfully staff at check in, surprisingly comfortable seating

My flight time was changed without any notification to me which ruined my time sensitive plans so I ended up completely changing my travel plans and no reimbursement.

Terrible. Our first time back on United for 10 years, the seats in Polaris class are small and uncomfortable. They have squished too many people in to get more $$$. The staff are not friendly and not wanting to accommodate. I asked for two salads rather than a main meal and was advised no we wont do that. Then asked what I would like for breakfast and given something else anyway. I will not be flying United International anytime soon.

Food should be changed in menu Many muslims travels in this airlime they need to add one Halal meal

Smooth flight. As always dinner could have been more generous. Breakfast was great.

Moody attendants that can barely look up at the passengers. I’m all for people having an off day, but you can tell some Untied Airlines Employees have lost their zeal for their jobs

Great checkin experience and flight crew were very friendly and helpful

Staff did not care, and very clearly did not want to be serving passengers. Requests were ignored repeatedly. Toilets filthy. Bins were just trash bags hung around the place that were never emptied. It was a challenge to even get a glass of water on a 14 hour flight.

Got automatically assigned a middle seat, unless I fork out extra money for seat assigment.

Everything you need to know for your flight from Portland to Sydney

Information on your arrival and departure airports

Portland (PDX)
Sydney (SYD)