SEA - SYD

$624 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 22/4. 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

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
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 20% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest return fare
$1,364
Typical prices: $1,912-$1,320
Qantas Airways
Wed 22/4Wed 6/5
SEA - SYD • 1 stop
Cheapest one-way flight
$624
Typical prices: $763-$1,168
Multiple Airlines
Wed 22/4
SEA - SYD • 2 stops
Top airlines
Qantas Airways
Cheapest • from $1,364 (return)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Direct flights
Not available
There are currently no direct flights between Seattle and Sydney. You’ll need at least 1 connection.
Insights
Insights
Insights
Insights
Top stopover airports
Los Angeles (LAX)
Cheapest • Avg $1,215 (return)
San Francisco (SFO)
Shortest trip • 18h 53m (one-way)
Insights
Insights
Insights
Insights
When to travel
August
Cheapest • 22% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
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 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

Wed, 22 Apr - Wed, 6 May
Qantas Airways Logo
17:06 - 07:05
SEA
-
SYD
20h 59m
1 stop
Qantas Airways Logo
17:50 - 19:53
SYD
-
SEA
19h 03m
1 stop
$1,364Qantas Airways
Mon, 20 Apr - Mon, 4 May
Qantas Airways Logo
18:59 - 07:30
SEA
-
SYD
19h 31m
1 stop
Qantas Airways Logo
17:50 - 19:53
SYD
-
SEA
19h 03m
1 stop
$1,366Qantas Airways
Wed, 13 May - Sun, 31 May
Qantas Airways Logo
10:00 - 07:05
SEA
-
SYD
28h 05m
1 stop
Qantas Airways Logo
09:10 - 21:49
SYD
-
SEA
29h 39m
1 stop
$1,377Qantas Airways
Mon, 1 Jun - Mon, 29 Jun
Multiple Airlines Logo
18:14 - 07:30
SEA
-
SYD
20h 16m
1 stop
Multiple Airlines Logo
09:10 - 11:52
SYD
-
SEA
19h 42m
1 stop
$1,390Multiple Airlines
Tue, 28 Jul - Tue, 11 Aug
Multiple Airlines Logo
17:10 - 07:05
SEA
-
SYD
20h 55m
1 stop
Multiple Airlines Logo
21:25 - 22:41
SYD
-
SEA
18h 16m
1 stop
$1,391Multiple Airlines
Wed, 13 May - Sun, 31 May
American Airlines Logo
14:57 - 07:05
SEA
-
SYD
23h 08m
2 stops
American Airlines Logo
09:10 - 13:57
SYD
-
SEA
21h 47m
1 stop
$1,394American Airlines
Mon, 27 Apr - Sun, 10 May
American Airlines Logo
11:41 - 07:05
SEA
-
SYD
26h 24m
2 stops
American Airlines Logo
17:50 - 22:58
SYD
-
SEA
22h 08m
1 stop
$1,398American Airlines
Sun, 19 Apr - Mon, 4 May
American Airlines Logo
18:40 - 07:30
SEA
-
SYD
19h 50m
1 stop
American Airlines Logo
09:10 - 18:07
SYD
-
SEA
25h 57m
1 stop
$1,400American Airlines
Sun, 14 Jun - Tue, 30 Jun
Multiple Airlines Logo
07:15 - 07:30
SEA
-
SYD
31h 15m
1 stop
Multiple Airlines Logo
09:10 - 12:51
SYD
-
SEA
20h 41m
1 stop
$1,401Multiple Airlines
Sun, 3 May - Tue, 19 May
Multiple Airlines Logo
19:04 - 06:25
SEA
-
SYD
18h 21m
1 stop
Multiple Airlines Logo
09:10 - 12:56
SYD
-
SEA
20h 46m
1 stop
$1,403Multiple Airlines
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?

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

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 August, where tickets cost $1,195 (return) on average. On the other hand, the most expensive months are December and January, where the average cost of round-trip tickets is $2,272 and $1,861 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 21 weeks before departure.

Find deals

Good to know

Low seasonJanuary
Cheapest flight$624
Best time to beat the crowds but there is an average 21% increase in price.
Most popular time to fly (47% 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 $624 for a one-way ticket and $1,364 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 is the only airline alliance operating flights between Seattle and Sydney.

  • 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 airline 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 9538 reviews
6.6Food
7.3Comfort
7.1Entertainment
8.1Crew
7.7Boarding
Airline reviews

I had a good time. However, I paid for the wifi and it was in and out the whole flight.

6.0 GoodMel, Apr 2026
JFK - HND
Read more United Airlines reviews

I had a good time. However, I paid for the wifi and it was in and out the whole flight.

one staffer was frustrated (it happen); the flight was late and the pilot mentioned they'll make amend but the snacks were the same, other than that the aircraft was clean and everything went smooth, no complaints

The wheelchair service is useless. They live you in different spots, not tell you anything just wait. I waited 30 minutes in Frankfurt when decided to walk the 25 minutes distance. In Budapest nobody came.

It was perfect! I've never flown with United before, but I definitely will in the future

I had a cancelled flight because of technical issues going to my destination, and a delayed flight coming home. All told it wasn’t a total bust.

Just a bad day to fly. Flight was delayed from scheduled 6:50 pm departure to 8:50 pm. Combination of factors mostly related to weather at the destination airport (which is where the incoming flight originated) which delayed the inbound flight over an hour. Once on board, we taxied but had to hold again on the taxiway for 10 minutes or so. We did not get wheels up until after 9 pm. The flight was smooth but about 18 minutes from our destination, we had to hold for several minutes more due to weather at ORD. We finally landed at ORD about 11:08 pm (accounting for the time difference, that was about a 3 hour delay from our scheduled departure time). It felt like we were never going to get to our destination. But the flight crew and attendants were very good. The movie selection onboard was also very nice. Got to watch half of a movie just during our taxi from the gate at ATL due to the delay!

Fine. The issues I had were associated with luggage being delayed from Turkey to Tanzania

No meal service to the back of the plane as it started late or was too slow to get it out before it was time to land.

Terrible, if possible won't be flying again anytime soon!

Efficient boarding and early departure. Very smooth flight. Early arrival in ATL. Great flight.

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

Information on your arrival and departure airports

Seattle (SEA)
Sydney (SYD)