SEA - SYD

$560 Find Cheap Flights from Seattle 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 Seattle to Sydney departing on 13/9. 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 Seattle 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 Seattle to Sydney, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Seattle to Sydney (SEA-SYD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Seattle 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 Seattle to Sydney

Thu, 30 Oct - Fri, 14 Nov
Qantas Airways Logo
14:42 - 09:00SEA-SYD
24h 18m1 stop
Qantas Airways Logo
17:45 - 19:58SYD-SEA
21h 13m1 stop
$1,229Qantas Airways
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Fri, 17 Oct - Fri, 24 Oct
American Airlines Logo
13:35 - 06:55SEA-SYD
23h 20m1 stop
American Airlines Logo
10:10 - 21:40SYD-SEA
29h 30m1 stop
$1,252American Airlines
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Sun, 1 Mar - Thu, 12 Mar
Air Canada Logo
05:50 - 16:40SEA-SYD
39h 50m2 stops
Air Canada Logo
08:00 - 22:06SYD-SEA
32h 06m2 stops
$1,258Air Canada
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Mon, 3 Nov - Mon, 24 Nov
 Logo
14:59 - 07:25SEA-SYD
21h 26m1 stop
 Logo
17:45 - 17:58SYD-SEA
19h 13m1 stop
$1,262
Find Deal
Tue, 21 Oct - Fri, 31 Oct
Air Canada Logo
14:55 - 08:20SEA-SYD
23h 25m1 stop
Air Canada Logo
10:20 - 09:31SYD-SEA
17h 11m1 stop
$1,264Air Canada
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Thu, 16 Oct - Thu, 23 Oct
 Logo
18:50 - 08:05SEA-SYD
19h 15m1 stop
 Logo
10:10 - 10:59SYD-SEA
18h 49m1 stop
$1,267
Find Deal
Sat, 1 Nov - Tue, 13 Jan
United Airlines Logo
14:41 - 09:15SEA-SYD
24h 34m1 stop
United Airlines Logo
12:10 - 15:44SYD-SEA
22h 34m1 stop
$1,275United Airlines
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Wed, 17 Sep - Sun, 5 Oct
Delta Logo
12:45 - 06:35SEA-SYD
24h 50m1 stop
Delta Logo
10:25 - 12:45SYD-SEA
20h 20m1 stop
$1,287Delta
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Mon, 29 Sep - Wed, 15 Oct
United Airlines Logo
08:42 - 07:00SEA-SYD
29h 18m3 stops
United Airlines Logo
11:20 - 12:02SYD-SEA
18h 42m1 stop
$1,293United Airlines
Find Deal
Tue, 30 Sep - Fri, 17 Oct
Delta Logo
11:15 - 06:35SEA-SYD
26h 20m2 stops
Delta Logo
10:25 - 13:00SYD-SEA
20h 35m1 stop
$1,294Delta
Find Deal
Booking Insights

KAYAK's insights & trends for Seattle to Sydney flights

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

How much is a return flight from Seattle to Sydney?

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

The average price of all round-trip flights from Seattle 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 Monday and more expensive on a Saturday. On your return trip to Seattle, you should consider flying back on a Thursday, and avoid Sundays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle 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 Seattle to Sydney is February, where tickets cost $1,491 (return) on average. On the other hand, the most expensive months are December and January, where the average cost of round-trip tickets is $2,132 and $2,023 respectively.

How far in advance should I book a flight from Seattle 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 Seattle 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 Seattle to Sydney, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Good to know

Low seasonMay
Cheapest flight$560
Best time to beat the crowds but there is an average 1% increase in price.
Most popular time to fly (25% more expensive on average)
Flight from Seattle to Sydney

When to book flights from Seattle to Sydney

Are your dates flexible? Find out the best times to travel from Seattle 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 Seattle to Sydney

  • Are there direct flights from Seattle to Sydney?

    Yes, there are direct flights from Seattle/Tacoma International (SEA) to Sydney/Kingsford Smith (SYD). There is a range of direct flights to choose from, such as Delta, Hawaiian, Fiji Airways, and many more. However, there are several indirect flights to choose from if you are looking for a cheaper flight.

  • Are there any hotels in Sydney Airport (SYD)?

    Yes, there are multiple hotels near and at the airport in Sydney that also provides shuttle services to and from the airport. If you can't stay outside, look no further than the hotels at the airport. These include Rydges Sydney Airport Hotel, Citadines Connect Airport Hotel, and Travelodge Hotel Sydney Airport.

  • What is the best way to get to Sydney CBD from SYD?

    There are several ways to get to Sydney CBD from the airport. You can use a train which will take about 17min or rideshare app services which will take 20min. Alternatively, you can take public transport, a bus which will take 28mins.

  • What is the best way to get to SEA from downtown Seattle?

    It takes about 20min to get to SEA from downtown Seattle by bus. You can order a taxi or use a shuttle. The shuttle runs from the terminals at regular intervals between SEA and downtown.

  • What is the cheapest flight from Seattle to Sydney?

    In the last 3 days, the lowest price for a flight from Seattle to Sydney was $367 for a one-way ticket and $805 for a return.

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

    Seattle and Sydney are both served by 1 main airport. You will leave Seattle from Seattle/Tacoma Intl and will be arriving at Sydney Kingsford Smith.

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

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

  • Which airline alliances offer flights from Seattle to Sydney?

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

  • Which is the best airline for flights from Seattle to Sydney, United Airlines or Air Canada?

    The two airlines most popular with KAYAK users for flights from Seattle to Sydney are United Airlines and Air Canada. With an average price for the route of $1,723 and an overall rating of 7.4, United Airlines is the most popular choice. Air Canada is also a great choice for the route, with an average price of $1,618 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from Seattle 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 Seattle to Sydney.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sydney from Seattle 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 Seattle 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 Seattle with another airline.

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

  • If you are flying out of Seattle/Tacoma International Airport (SEA) and would like to park your car, SEA offers various options at reasonable prices, depending on how long you plan to park. If you are planning for long-term parking, Park n Jet, located 1mile from Seattle/Tacoma International Airport, is the best choice. For short-term parking, you can use Aeroparking, which is located 1.2 miles from the airport. Also, there is an airport shuttle dropping passengers at each terminal.
  • If you are traveling with kids from Seattle/Tacoma International Airport (SEA) to Sydney Kingsford Smith International Airport (SYD), there are multiple play areas and food courts to enjoy before your flight to SYD. The play areas are located across Delta Sky Lounge between Central terminals and Gate A. They are equipped with many toys for kids.
  • If you are looking to spend the night close to the airport for an early flight, look no further than the best hotels in Seattle, which offer several excellent amenities. Most of them are easily accessible from the airport. Some of the hotels include Double Tree by Hilton, which is located 1.2 miles from the airport, Hampton Inn & Suites Seattle, located at 1.3 miles, and Red Lion Hotel Seattle Airport, which is 1 mile from the airport.
  • SYD offers transport services out of the airport for passengers on a tight schedule upon request. To use these services, call your airline to inform them how best they can help ahead of time. You can choose between a shared ride or express reservation, which you can book online in advance.
  • It is recommended that you arrive a few hours before your trip if traveling out of SEA. If you go to the SEA website ahead of time, you can view the security line wait times to plan ahead of time.

Reviews of the top airlines flying from Seattle to Sydney

 
See real verified KAYAK customer reviews for airlines flying from Seattle 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 Seattle 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 8937 reviews
7.1Entertainment
6.6Food
7.3Comfort
8.1Crew
7.7Boarding
Airline reviews

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

10.0 ExcellentThomas, Aug 2025CMH - IAD
Read more United Airlines reviews

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. .

I flew with my dog and had already purchased my dog’s ticket. Even that morning I had called costumer service to insure that my husband and I had seats together since the website was giving me an error when choosing our seats and the representative mentioned our dog. I showed up early to the airport and when I got to the gate and we started boarding I was help back and told that I was supposed to have a yellow tag and that I should have checked in at the counter for them to give me that tag. I was not aware of this, the representative on the phone did not say anything. Nor did I see it anywhere in the checking process online, so if you travel with a pet and are not checking in luggage, just know that you still have to go to the check in counter when arriving at the airport unless you want to be the last one to board and not have room for your carry on in the overhead bins. Other than that, I had a great experience.

Once we got in the air the pilot made up some of the time of the delay. So that was really nice.

We had a layover from YVR to Denver. We bought 4 bottles of Absolut Vodka at the YVR Duty Free for $116.20, after going through security and American Customs Pre Clearance at YVR, Vancouver. When we landed in Denver, United put us behind the American Customs as well as TSA again for some reason. We were forced to go through American Customs and TSA again. TSA confiscated our rightfully owned Duty Free Absolut Vodka bottles. Because United incorrectly forced our flight behind American border and TSA again, we missed the connecting flight. After United put us on a later flight, we eventually arrived in Chicago very late, with hardly any sleep. I am looking for compensation from United for our incorrectly confiscated Absolut Vodka bottles worth $116.20, as well as compensation for incorrectly putting us behind American Customs and TSA again, causing us to miss our connecting flight, making us arrive extremely late in Chicago.

From the first moment you interact with United Airlines, you can expect nothing less but extreme frustration. The baggage handler at the bag drop seems completely unbothered by the presence of customers waiting in line. No help was extended to load the baggage whatsoever. And if any of your bags is overweight by 0.01 pound they will make you re-distribute everything in your suitcase just to play power trip. When it was time to board no help was extended to customers to locate their seats. Moreover. It was a chaotic mess at the gate when it was unclear who should board first and everyone just bunched up, trying to get on the plane. I am sure the crew was doing their best to perform their jobs while being paid their wages however it shouldn’t be that hard to smile once or twice when you’re in the business if serving customers. It is a shame for the United States of America to have a flagship carrier of such low caliber. Our flight was also delayed by about an hour and a half due to further delays prior to our inbound flight. Being someone who has travelled for both business and leisure in Asia, Europe, and South America I have never experienced such poor quality of service.

My flight from New York to Canada and Canada to Brisbane was canceled, so I had to take united airlines instead flight from New York to Dubai then layover in Dubai 8 hours then from Dubai to Brisbane it was extremely difficult for me , it was a nightmare flying with Canadian airlines unfortunately.

I found the boarding easy and my seat was very comfortable as I had a lot of leg room. I am not too happy that I no longer have lounge access even though I used to get it with my TD credit card.

Flight cancelled. Major disruption to our travel. Do not use Air Canada from KC. To few flights.

Real smooth and easy, Real good leg room in coach!

There labor disputes cancelled my flight less than 24 hours before my boarding time but there customer service/website was easy enough to navigate and they rebooked me for no upcharge.

Re luggage I carried a backpack only. I did not check any bags in. However there were other passengers with carry on luggage going in the plane. My question is why are others allowed to have a carry on luggage inside the plane? Shouldn’t they have dropped it off at the gate? I’m asking because I could have brought the same thing instead of a backpack only. Please clarify for future reference. Thank you.

Like the service. Very hard to communicate or contact when have problems

Very bad, flight was cancelled due to strike and staff was unable to rebook us

They rescheduled me and I had no issues with the new flight

Air Canada is my new fave airline..I plan to use when I can. No complaints at all just rave compliments for the staff and airline.

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

Information on your arrival and departure airports

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