SEA - SYD

$634 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 15/6. 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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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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Cheap Flight Deals 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.

Recent return flight deals from Seattle to Sydney

KAYAK's recommended return flight deals from the most popular airlines that fly from Seattle to Sydney.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
 Logo
18:25 - 14:40SEA-SYD
27h 15m1 stop
 Logo
16:20 - 07:11SYD-SEA
31h 51m2 stops
$1,378
Find Deal
Thu, 5 Jun - Thu, 12 Jun
 Logo
18:25 - 14:40SEA-SYD
27h 15m1 stop
 Logo
16:20 - 07:11SYD-SEA
31h 51m2 stops
$1,399
Find Deal
Thu, 5 Jun - Thu, 12 Jun
Philippine Airlines Logo
23:35 - 09:00SEA-SYD
39h 25m1 stop
Philippine Airlines Logo
11:15 - 19:35SYD-SEA
26h 20m1 stop
$1,427Philippine Airlines
Find Deal
Sun, 12 Oct - Sun, 26 Oct
Philippine Airlines Logo
23:35 - 09:00SEA-SYD
39h 25m1 stop
Philippine Airlines Logo
11:15 - 19:35SYD-SEA
26h 20m1 stop
$1,515Philippine Airlines
Find Deal
Sun, 19 Oct - Sun, 26 Oct
Air New Zealand Logo
17:14 - 08:45SEA-SYD
22h 31m2 stops
Air New Zealand Logo
11:50 - 22:15SYD-SEA
27h 25m2 stops
$1,716Air New Zealand
Find Deal
Tue, 5 Aug - Tue, 19 Aug
Air New Zealand Logo
17:35 - 08:45SEA-SYD
22h 10m2 stops
Air New Zealand Logo
08:45 - 18:49SYD-SEA
27h 04m2 stops
$1,734Air New Zealand
Find Deal
Wed, 27 Aug - Tue, 9 Sep
Air Canada Logo
10:00 - 08:20SEA-SYD
28h 20m1 stop
Air Canada Logo
10:20 - 09:21SYD-SEA
17h 01m1 stop
$1,806Air Canada
Find Deal
Mon, 13 Oct - Tue, 21 Oct
Air Canada Logo
13:45 - 08:20SEA-SYD
24h 35m1 stop
Air Canada Logo
08:00 - 09:50SYD-SEA
19h 50m2 stops
$1,815Air Canada
Find Deal
Sun, 19 Oct - Sun, 26 Oct
United Airlines Logo
17:14 - 08:00SEA-SYD
20h 46m1 stop
United Airlines Logo
11:20 - 16:09SYD-SEA
22h 49m1 stop
$1,928United Airlines
Find Deal
Sat, 11 Oct - Tue, 21 Oct
United Airlines Logo
10:26 - 08:00SEA-SYD
27h 34m2 stops
United Airlines Logo
10:30 - 15:31SYD-SEA
23h 01m2 stops
$1,935United Airlines
Find Deal
Sat, 11 Oct - Wed, 22 Oct

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.

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 March, where tickets cost $1,612 (return) on average. On the other hand, the most expensive months are December and January, where the average cost of round-trip tickets is $2,331 and $1,934 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 5 weeks before departure. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

Good to know

Low season

May

High season

December

Cheapest flight

$634
Best time to beat the crowds but there is an average 2% increase in price.
Most popular time to fly (30% 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 $405 for a one-way ticket and $881 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 Star Alliance 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 $1,444 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 $1,658 and an overall rating of 7.0.

  • 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.

See more FAQs

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.
See more tips

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 8685 reviews
8.1Crew
6.6Food
7.7Boarding
7.1Entertainment
7.3Comfort
Airline reviews

Multiple delays and not straight answer from the United team

2.0 MediocreAlex, Apr 2025FLL - EWR
Read more United Airlines reviews

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

The design of the light switch on the arm rest is ridiculous.

Smooth boarding process. Early departure, smooth flight, early arrival. The entertainment package has very good recent movie options. The flight crew were friendly and professional.

leg space better than expected. two washrooms for one plane isn't enough.

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

Terrible experience, flight was delayed both ways. Limited compensation for the 5+ hour delay. Will not be flying Air Canada Rouge, and don’t recommend you do either.

The boarding was relatively quick, the crew welcoming and flight uneventful. The omission of meals on all airlines is unacceptable especially when the flight is during a mealtime such as this one, (lunchtime), is unacceptable.

Everything was simple and easy. The lady at the gate was super friendly, I wish I had her name to share. She's a little older, dark-haired. You can tell she likes her job and would be a great influence on any young people training with her.

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

Information on your arrival and departure airports

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