PDX - SYD

$809 Find Cheap Flights from Portland to Sydney

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 23/9. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Sydney

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Sydney, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Sydney, as well as popular online travel agencies
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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

Tue, 10 Feb - Sat, 28 Feb
Hawaiian Airlines Logo
14:45 - 19:45PDX-SYD
34h 00m2 stops
Hawaiian Airlines Logo
21:40 - 00:03SYD-PDX
21h 23m2 stops
$1,486Hawaiian Airlines
Find Deal
Tue, 10 Feb - Sat, 28 Feb
Hawaiian Airlines Logo
16:00 - 19:45PDX-SYD
32h 45m2 stops
Hawaiian Airlines Logo
21:40 - 00:03SYD-PDX
21h 23m2 stops
$1,499Hawaiian Airlines
Find Deal
Thu, 25 Sep - Wed, 1 Oct
Delta Logo
17:10 - 06:35PDX-SYD
20h 25m2 stops
Delta Logo
09:25 - 14:52SYD-PDX
22h 27m2 stops
$1,549Delta
Find Deal
Fri, 26 Sep - Fri, 3 Oct
Qantas Airways Logo
17:35 - 07:05PDX-SYD
20h 30m1 stop
Qantas Airways Logo
17:45 - 21:16SYD-PDX
20h 31m1 stop
$1,552Qantas Airways
Find Deal
Sat, 27 Sep - Sat, 4 Oct
United Airlines Logo
23:55 - 06:55PDX-SYD
38h 00m2 stops
United Airlines Logo
09:30 - 17:21SYD-PDX
24h 51m2 stops
$1,564United Airlines
Find Deal
Mon, 3 Nov - Sat, 15 Nov
Air Canada Logo
19:00 - 09:35PDX-SYD
19h 35m1 stop
Air Canada Logo
11:20 - 14:45SYD-PDX
22h 25m1 stop
$1,595Air Canada
Find Deal
Thu, 25 Sep - Thu, 2 Oct
Delta Logo
17:01 - 06:35PDX-SYD
20h 34m1 stop
Delta Logo
09:25 - 11:45SYD-PDX
19h 20m1 stop
$1,624Delta
Find Deal
Mon, 20 Oct - Fri, 31 Oct
Air Canada Logo
19:40 - 12:40PDX-SYD
23h 00m2 stops
Air Canada Logo
10:20 - 18:30SYD-PDX
26h 10m1 stop
$1,625Air Canada
Find Deal
Thu, 26 Feb - Tue, 10 Mar
Qantas Airways Logo
15:43 - 10:55PDX-SYD
24h 12m2 stops
Qantas Airways Logo
21:25 - 20:38SYD-PDX
17h 13m1 stop
$1,630Qantas Airways
Find Deal
Sun, 7 Dec - Wed, 17 Dec
United Airlines Logo
06:00 - 09:05PDX-SYD
32h 05m2 stops
United Airlines Logo
11:50 - 18:41SYD-PDX
25h 51m2 stops
$1,723United Airlines
Find Deal

Everything you should know

Top airlines
Hawaiian Airlines
Cheapest • from $1,486 (return)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
2 weeks
in advance
Our data shows that travellers who book at least 2 weeks in advance save around 14% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 11% price drop
February
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest return fare
$1,486
Typical prices: $1,445-1829
Hawaiian Airlines
Tue 10/2Sat 28/2
PDX - SYD • 2 stops
Cheapest one-way flight
$809
Typical prices: $783-938
Qantas Airways
Tue 23/9
PDX - SYD • 1 stop
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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!
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?

What’s the cheapest day of the week to fly from Portland to Sydney?

The average price of all round-trip flights from Portland to Sydney clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Portland to Sydney, look for departures on Wednesdays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from Sydney, Tuesday is the cheapest day to fly and Saturday is the most expensive.

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 $1,499 (return) on average. On the other hand, the most expensive months are December and January, where the average cost of round-trip tickets is $2,103 and $1,807 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 14% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Good to know

Low seasonMay
Cheapest flight$809
Best time to beat the crowds (7% less expensive on average)
Most popular time to fly and prices are also 6% lower 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 3 days, the lowest price for a flight from Portland to Sydney was $539 for a one-way ticket and $990 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?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Portland and Sydney, with Star Alliance being the most commonly used for this route.

  • 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 8929 reviews
8.1Crew
7.1Entertainment
7.7Boarding
7.3Comfort
6.6Food
Airline reviews

We had to deboard 2 times due to maintenance issues. They changed the plane, and then we got deviated to LAX due to maibtenance issues on the other plane, had to sleep at LAX and los a full day.

2.0 MediocreAnonymous, Sept 2025SFO - MEX
Read more United Airlines reviews

We had to deboard 2 times due to maintenance issues. They changed the plane, and then we got deviated to LAX due to maibtenance issues on the other plane, had to sleep at LAX and los a full day.

Everything was good, except the seats in economy were so close together, you could barely get out when the seat in front of your was reclined. If the airlines keep jamming in more and more seats, it will become intolerable. I will look for another airline that considers customer comfort and does not keep adding more rows of seats for more profit.

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

IAD with the archaic people movers is just a place to be avoided.

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Tastless food and too obvious lack of enthusiasm for service in the economy vesus business class

All of the United employees I interacted with were professional and courteous. The aircraft was clean, the food on the flight was good. No complaints here.

I had no checked baggage but was required to hand over carry on baggage at the door of the plane. There was a lot of overboard space in the plane and I was one of the last ones. I ran to get my carry on but it was gone. I was given back at the plane door in Toronto, so the wait was not as long as it would have been at the carousel.

Armrest controller on my seat 35D and nextbooennseat 35E did not work right. Hard to press buttons to recognize and 35D had constantnpressure either upmost down somit was nearly impossible to make selections. .

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

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