PDX - SYD

$431 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 10/18. 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.
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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Sydney.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Sydney.
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Flights Deals

Cheap Flight Deals from Portland to Sydney (PDX-SYD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip 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.

Recent round-trip flight deals from Portland to Sydney

KAYAK's recommended round-trip deals from the most popular airlines that fly from Portland to Sydney.
Discover the best prices for you by selecting your travel dates on KAYAK.
United Airlines Logo
7:46 pm - 6:55 amPDX-SYD
18h 09m1 stop
United Airlines Logo
10:20 am - 6:32 pmSYD-PDX
25h 12m1 stop
$966United Airlines
Find Deal
Sat, Aug 9 - Sat, Aug 30
United Airlines Logo
8:50 am - 7:00 amPDX-SYD
29h 10m2 stops
United Airlines Logo
9:30 am - 3:05 pmSYD-PDX
22h 35m2 stops
$970United Airlines
Find Deal
Sat, Aug 9 - Sat, Aug 30
Alaska Airlines Logo
8:00 am - 7:45 pmPDX-SYD
18h 45m1 stop
Alaska Airlines Logo
9:40 pm - 9:55 pmSYD-PDX
17h 15m1 stop
$1,158Alaska Airlines
Find Deal
Fri, May 30 - Fri, Jun 6
Alaska Airlines Logo
5:33 pm - 7:45 pmPDX-SYD
33h 12m1 stop
Alaska Airlines Logo
9:40 pm - 9:55 pmSYD-PDX
17h 15m1 stop
$1,250Alaska Airlines
Find Deal
Tue, May 27 - Tue, Jun 3
Delta Logo
12:35 pm - 6:35 amPDX-SYD
25h 00m1 stop
Delta Logo
9:25 am - 6:54 pmSYD-PDX
26h 29m1 stop
$1,291Delta
Find Deal
Wed, Jul 16 - Sun, Jul 27
Delta Logo
3:35 pm - 6:35 amPDX-SYD
22h 00m2 stops
Delta Logo
9:25 am - 5:07 pmSYD-PDX
24h 42m2 stops
$1,296Delta
Find Deal
Wed, Jul 16 - Sun, Jul 27
Qantas Airways Logo
10:30 am - 7:05 amPDX-SYD
27h 35m1 stop
Qantas Airways Logo
9:10 am - 10:30 pmSYD-PDX
30h 20m1 stop
$1,344Qantas Airways
Find Deal
Sat, Jun 7 - Mon, Jun 16
Air Canada Logo
7:40 pm - 7:20 amPDX-SYD
18h 40m1 stop
Air Canada Logo
9:20 am - 9:25 amSYD-PDX
41h 05m1 stop
$1,739Air Canada
Find Deal
Tue, Aug 12 - Fri, Aug 15
Qantas Airways Logo
2:56 pm - 10:40 amPDX-SYD
26h 44m2 stops
Qantas Airways Logo
5:50 pm - 7:10 pmSYD-PDX
42h 20m3 stops
$2,950Qantas Airways
Find Deal
Sun, Aug 17 - Sat, Aug 30
Air Canada Logo
7:40 pm - 7:20 amPDX-SYD
18h 40m1 stop
Air Canada Logo
9:20 am - 9:25 amSYD-PDX
41h 05m1 stop
$5,000Air Canada
Find Deal
Wed, Aug 13 - Fri, Aug 15
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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.

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.

Your flight ticket price will generally be cheaper if you fly to Sydney on a Saturday and more expensive on a Thursday. On your return trip to Portland, you should consider flying back on a Thursday, and avoid Tuesdays for better deals.

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 February, where tickets cost $1,039 (return) on average. On the other hand, the most expensive months are December and January, where the average cost of round-trip tickets is $1,577 and $1,391 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. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

Good to know

Low seasonMay
High seasonOctober
Cheapest flight$431
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly and prices are also 4% 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 round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips 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 $431 for a one-way ticket and $966 for a round-trip.

  • Do I need a passport to fly between Portland and Sydney?

    Yes

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

  • What is the most popular layover when flying to Sydney from Portland?

    San Francisco is the most popular layover city among KAYAK users traveling from Portland to Sydney.

  • Which is the best airline for flights from Portland to Sydney, Delta or Alaska Airlines?

    The two airlines most popular with KAYAK users for flights from Portland to Sydney are Delta and Alaska Airlines. With an average price for the route of $1,159 and an overall rating of 8.0, Delta is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $1,252 and an overall rating of 8.0.

  • 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 round-trip ticket. You could then fly to Sydney with an airline and back to Portland with another airline. Booking your flights between Portland and SYD can sometimes prove cheaper using this method.

  • 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.

Top 5 airlines serving 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.
8.0
Alaska AirlinesOverall score based on 9972 reviews
8.1Boarding
7.1Entertainment
8.5Crew
7.1Food
7.9Comfort
Airline reviews

OUr pilot was very good and also a good landing in a very gusting Phoenix. Most important.

8.0 ExcellentAnonymous, Apr 2025PDX - PHX
Read more Alaska Airlines reviews

OUr pilot was very good and also a good landing in a very gusting Phoenix. Most important.

It was alright other than the changes in the Alaska Lounge. That and the migraine I had were disappointing. Other then that everything went well.

It was a short flight so no refreshments or entertainment which was fine.

Flying in both directions across country the gate designated on my boarding pass was wrong. From w to e across the country the passenger next to me coughed the entire way.

Although both planes (flights) had mechanical issue delaying both of my flights, the crew members handled everything with ease. Both flights had the smoothest take off and landing. I opted to upgrade my seat to first class and really lucked out getting the seat at the very front of the plane. Awesome treat to myself. I really enjoyed my flight.

The staff from check-in counter to the flight crew were great. Flight was right on schedule. 10/10

Changed flight from San Fran to Seattle Then with a Delayed takeoff barely made my connection Waited over an hour for luggage 😜

It was good. There was a mistake made in Seattle. Somehow we were bumped out of our seats as if we weren't on the flight anymore. The woman at the gate caught it and announced our name to come up and she fixed it.

I wouldn’t fly with Alaska again if you paid me.

I appreciated Alaska Airlines very much, they are expanding traveling locations globally as they partnered with another company and am excited and looking forward to our next traveling adventure with this great Airline. Thank you kindly

Flight was delayed due to weather. Crew did a nice job of making us comfortable. No complain complaints.

Our bag was lost so that made unnecessary chaos On our trip

Delta is my preferred airline. I've traveled with them for years. On time in most cases, good communication, easy to use app. Most planes are pretty nice. I was on a CRJ 700/900 however, which was pretty badly aged inside and needed a refresh. No infotainment, unreliable wifi, best to download before boarding or bring a book. Food choices are really just snacks on this flight, nice variety but about what you'd expect. Great staff and prompt in departure and early arrival too. Overall quite satisfied.

Crew was friendly Love the entertainment in the seat head rest.

Delta flight was on time, seats were comfortable, and crew was nice.

This had nothing to do with Delta… The flights were on time and flawless. The service was excellent. We purchased seats in (aisle/middle) comfort plus since this was a cross country flight. Unfortunately, the woman seated at the window was 300+ pounds and, as might be expected, covered up about a third of the middle seat also. there was absolutely nothing that Delta could have done about that… I just don’t know what the answer should be. If you purchase a seat, you should should be able to use the entire seat and not just the portion that someone else is not sitting/oozing in. Disappointing…there should be something that could be done….I'm just not sure what solution could be.

Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.

The worst part was I was NOT allowed in the lounge even though I was holding a first class ticket and have a premium American Express card. I have flown Business or First Class with many airlines. Delta is the ONLY one who does not extend this courtesy to anyone except people who hold the very expensive American Express card. As a result, I won’t fly Delta if I have any other choice.

It was an overnight flight and I desperately needed coffee before we landed, but Delta does only one beverage service, and that is shortly after takeoff, not before landing at 5 am.

A little bumpy ride . No food was being provided due the the turbulence. That was ok it was a short flight to my standards.

Pretty excellent. I don’t know what the pilot could have done better with the bumping ( there was a storm) nor what happened to my ears coming down into bendigo. It doesn’t happen coming down into Sydney just the return flight. I wonder why?

Loved the staff. The economy seats could have been bigger.

Airport and crew experience was excellent. We had to queue for the runway - no one’s fault, but it did mean we were 30 minutes late leaving

Overall good experience with flight and airport wheelchair staff. Also got Indian food in the flights

I liked the service, the menu, and the comfort of the seats! Even tho we were seated by the bathrooms, the reclining seats and movie selection was very good, my husband and I didn’t mind at all

Very good as always, stand out airline. The passengers whom choose to stuff baggage that otherwise should be checked-in is a real bother but that's not the airlines doing. A real frustration that passengers just don't want to check-in luggage. This is a pet hate unfortunately.

It’s a two prop flight so I had problems with my ears on re- entering ! But otherwise fine

I love flying with Qantas. There was no onscreen entertaining on this flight, and only a snack provided (not a meal) but still better than Jetstar or Virgin (in my opinion) so still happy.

The food was terrible. And the flight attendants were very rude. One flight attendant wouldn’t help a passenger lift their carry-on. Another flight attendant wouldn’t give a man an extra blanket. And they walked by not even looking at the passengers to see if they needed a glass of water.

Wheelchair assistance to move through the terminals and to/from the plane door was excellent. No vegan snack on the flight, only something with salami and cheese in it.

Everything is good except the dinner and breakfast. The sandwich is very delicious. Toilet is clean, I only use one of them. Flight attendants are very nice. 👍👍

A bit rush for transit. Food and entertainment are not available

Boarding was a little difficult. The gate area at O'Hare was very small and crowded due to multiple gates in the area. Could not hear the intercom, so had to rely on signage to see when my group was boarding and the signage was blocked by passengers standing in the gate. Flight was great and we arrived in Montreal on time.

Multiple delays and not straight answer from the United team

For economy, it was very good. Staff was great, they even let some of us change seats for more leg room... Put an empty seat between us which was fantastic for a 12hr flight. Onboard entertainment was excellent, I think over 200 choices of movies/tv/etc The bad was the barely/nonfunctional wifi that cost either $16.99 or 1700 miles (full flight). It was atrocious... Definitely the worst of the last 3 long haul major airlines I was on the last few months.

Stewardess spilled orange juice on my clothes/seat no help no apology just threw napkins at me to clean the mess up. Not Happy.

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

The plane pushed back from the gate on time. However, it stopped on the ramp, and we waited for over 20 minutes before the aircraft pulled back to the gate. Apparently, something of importance had to be removed from the aircraft by the gate agent. I found this to be odd. The delay was not significant, but I felt that whatever was on the aircraft that had to be taken off, should’ve been done before we pushed back from the gate.

I didn’t get on plane. Passport being processed by consulate with visa application. Tried to cancel through underpricer after purchasing cacelling for any reason. No dice, they are thieves.

Electric plugs didn't work. Entertainment system wasn't working

All was good except for the seats, not very comfy.

2.5 hour delay sitting in the plane on the tarmac, you tell me how the experience was

I hope these comments will find their way to AC customer experience team. Me and my spouse 50 years of aged coming back from 7 days perfect vacation... While boarding in FLL flight AC1621, one of the boarding agents (tall aged african american) man literelly yeld at my wife during the picture talking process. MAM ! STEP !! BACK !!! We are not illegal immegrants beying deported, nor are we in the millitary. We are customers returning home. This was unacceptable. While boarding in YYZ flight AC1154, one of the boarding agents (tall aged caucasian) man criticied with several complesant remarks my passport condition saying that I could not travel intl with it due to stain, decoloration, and BLOOD. My passport does not have blood on it! Yes it might be in less than perfect condition, but their are ways to talk to customer that does not imply not allow a boarding agent to be angry fathery like, or a custom agent looking at a suspicious individual. Both experience were less than acceptable for might I remind you a paying CUSTOMER returning home.

Short flight so no food or entertainment. Good landing at SFO and on time. We were told no carryon luggage yet lots of people were puting bags in overhead compartments. The rules need to be made more clear. I was on the first leg of an international flight and this is the first time I could not have carryon luggage.

This flight didn't happen for me because of overbooking.

My flight was overbooked and they would not let me board. I had to book another flight and pay the full amount of that flight. I did not get any help at all from Air Canada or United Airlines.

Comfortable seats and movies entertainment available. Better experience than the flight from Toronto to Denver.

Not enough electronic outlets for charging in the Air Canada waiting to board area but the Most important thing….the plane was booked to only 40% capacity and my row of 2 other seats were empty. My row happened to be one of the few rows that did NOT have raising arm rests. The flight attendant made effort to seat me in a different row. I needed wheelchair assistance due to a cyst on my knee and struggled to move from seat to seat to get to the row. Those 2 empty seats tormented me the entire 15+ hour flight as I had to be upright the entire flight and was not able to elevate my knee. Lots of other passengers were laying down due to the arm rest being able to retract. It is a shame that he couldn’t be gracious and find a row that I could move to.

Poor air traffic controller staffing led to a 50%reduction on flights so we got to wait 4 hrs for our flight! Very disorganized at the gate Poor communication with customers

It was delayed by almost 90 minutes and that messed up our plans but it was beyond UA’s control that is what we heard

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