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Flights from Sydney to Seattle

Find flight deals from Sydney to Seattle for the next 3 months. Book one way flights from $594 or round trip flights from $913.

      • SYD 9:10 AM
        30h 48m
        1 stop
        SEA 10:58 PM
        Sydney - Seattle | Tue, May 12 | American Airlines
        SEA 10:00 AM
        28h 5m
        1 stop
        SYD 7:05 AM
        Seattle - Sydney | Tue, May 19 | American Airlines
        $913 $1,049
        13% off
        13% off
        $1,049 $913
      • SYD 9:15 AM
        18h 40m
        1 stop
        SEA 10:55 AM
        Sydney - Seattle | Tue, May 12 | Delta Air Lines
        SEA 7:25 AM
        30h 25m
        1 stop
        SYD 6:50 AM
        Seattle - Sydney | Tue, May 19 | Delta Air Lines
        $913 $1,049
        13% off
        13% off
        $1,049 $913
      • SYD 9:15 AM
        20h 20m
        1 stop
        SEA 12:35 PM
        Sydney - Seattle | Sat, May 23 | Delta Air Lines
        SEA 9:20 PM
        40h 30m
        1 stop
        SYD 6:50 AM
        Seattle - Sydney | Sat, May 30 | Delta Air Lines
        $930 $1,049
        11% off
        11% off
        $1,049 $930
      • SYD 9:20 AM
        16h 55m
        1 stop
        SEA 9:15 AM
        Sydney - Seattle | Fri, May 15 | Air Canada
        SEA 3:00 PM
        23h 20m
        1 stop
        SYD 7:20 AM
        Seattle - Sydney | Sat, May 23 | Air Canada
        $945
        10% off
        $1,049 $945
      • SYD 9:15 AM
        18h 40m
        1 stop
        SEA 10:55 AM
        Sydney - Seattle | Mon, May 11 | Delta Air Lines
        SEA 12:40 PM
        25h 10m
        1 stop
        SYD 6:50 AM
        Seattle - Sydney | Mon, May 18 | Delta Air Lines
        $957
        9% off
        $1,049 $957
      • SYD 9:15 AM
        18h 40m
        1 stop
        SEA 10:55 AM
        Sydney - Seattle | Tue, May 19 | Delta Air Lines
        SEA 7:55 PM
        41h 55m
        1 stop
        SYD 6:50 AM
        Seattle - Sydney | Mon, May 25 | Delta Air Lines
        $958
        9% off
        $1,049 $958
      • SYD 9:10 AM
        21h 47m
        1 stop
        SEA 1:57 PM
        Sydney - Seattle | Thu, May 21 | American Airlines
        SEA 2:40 PM
        23h 25m
        1 stop
        SYD 7:05 AM
        Seattle - Sydney | Thu, May 28 | American Airlines
        $959
        9% off
        $1,049 $959
      • SYD 10:20 AM
        19h 14m
        1 stop
        SEA 12:34 PM
        Sydney - Seattle | Mon, Jun 8 | United Airlines
        SEA 1:30 PM
        24h 25m
        1 stop
        SYD 6:55 AM
        Seattle - Sydney | Mon, Jun 15 | United Airlines
        $963
        8% off
        $1,049 $963
      • SYD 9:15 AM
        31h 41m
        1 stop
        SEA 11:56 PM
        Sydney - Seattle | Mon, May 25 | Delta Air Lines
        SEA 9:20 PM
        40h 30m
        1 stop
        SYD 6:50 AM
        Seattle - Sydney | Sun, May 31 | Delta Air Lines
        $964
        8% off
        $1,049 $964
      • SYD 9:15 AM
        18h 40m
        1 stop
        SEA 10:55 AM
        Sydney - Seattle | Tue, Jun 2 | Delta Air Lines
        SEA 9:40 PM
        40h 10m
        1 stop
        SYD 6:50 AM
        Seattle - Sydney | Mon, Jun 8 | Delta Air Lines
        $965
        8% off
        $1,049 $965
      • SYD 1:00 PM
        17h 25m
        1 stop
        SEA 2:00 PM
        Sydney - Seattle | Sun, May 10 | Normal Airline
        SEA 3:00 PM
        6h
        Nonstop
        SYD 4:00 PM
        Seattle - Sydney | Tue, May 12 | Normal Airline
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        Find more flights
      • SYD 9:10 AM
        26h 25m
        1 stop
        SEA 6:35 PM
        Sydney - Seattle | Tue, May 12 | American Airlines
        $594 $672
        12% off
        12% off
        $672 $594
      • SYD 12:00 PM
        38h 32m
        1 stop
        SEA 9:32 AM
        Sydney - Seattle | Wed, Jun 3 | American Airlines
        $600 $672
        11% off
        11% off
        $672 $600
      • SYD 5:50 PM
        21h 9m
        1 stop
        SEA 9:59 PM
        Sydney - Seattle | Fri, Jun 12 | American Airlines
        $605 $672
        10% off
        10% off
        $672 $605
      • SYD 10:20 AM
        31h 52m
        1 stop
        SEA 1:12 AM
        Sydney - Seattle | Wed, May 13 | United Airlines
        $606
        10% off
        $672 $606
      • SYD 12:00 PM
        29h 44m
        1 stop
        SEA 12:44 AM
        Sydney - Seattle | Wed, May 13 | American Airlines
        $610
        9% off
        $672 $610
      • SYD 9:15 AM
        26h 20m
        1 stop
        SEA 6:35 PM
        Sydney - Seattle | Tue, May 12 | Delta Air Lines
        $612
        9% off
        $672 $612
      • SYD 9:15 AM
        28h 15m
        1 stop
        SEA 8:30 PM
        Sydney - Seattle | Wed, May 13 | Delta Air Lines
        $612
        9% off
        $672 $612
      • SYD 5:50 PM
        21h 9m
        1 stop
        SEA 9:59 PM
        Sydney - Seattle | Wed, Jun 3 | Qantas Airways
        $613
        9% off
        $672 $613
      • SYD 9:10 AM
        25h 57m
        1 stop
        SEA 6:07 PM
        Sydney - Seattle | Mon, May 18 | American Airlines
        $615
        8% off
        $672 $615
      • SYD 9:10 AM
        29h 49m
        1 stop
        SEA 9:59 PM
        Sydney - Seattle | Sun, May 31 | American Airlines
        $618
        8% off
        $672 $618
      • SYD 1:00 PM
        17h 25m
        1 stop
        SEA 2:00 PM
        Sydney - Seattle | Sun, May 10 | Normal Airline
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        Find more flights

Displayed flight fares from Sydney to Seattle are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Trip.com price insights on flights from Sydney to Seattle

What is the cheapest month for round-trip flights from to Seattle?

Average price of round-trip flights from to Seattle purchased by Trip.com users by month over the past 12 months

According to historical data from Trip.com, the lowest prices for flights from to Seattle are found during July, with an average price of $742. Conversely, the highest prices are found during April, with an average price of up to $1,851.

$1,851
$1,297
$742
$188
    Cheapest
  • $1,851
    Apr
  • $923
    May
  • $947
    Jun
  • $742
    Jul
  • $1,311
    Aug
  • $881
    Sep
  • $1,252
    Oct
  • $1,126
    Nov
  • $1,046
    Dec
  • $1,142
    Jan
  • $1,035
    Feb
  • $1,009
    Mar

When is the cheapest day to fly from Sydney to Seattle during Memorial Day?

Data is based on the lowest one-way price from Sydney to Seattle during Memorial Day on Trip.com in the past 3 days.

Memorial Day is scheduled for May 25. The cheapest flights from Sydney to Seattle are available on May 23, with fares starting at $598.

$719
$659
$598
$538
  • $719
    22
    May
  • $598
    23
  • $688
    24
  • $678
    25
  • $699
    26
  • $673
    27

Frequently Asked Questions

  • What are the cheapest flights from Sydney to Seattle (SYD-SEA)?

    Based on Trip.com data, American Airlines offers one-way fares as low as $594 on Cheapest nonstop routes (e.g. SYD to SEA on Tue, May 12), while American Airlines offers Cheapest nonstop round-trips from $913 departing on Tue, May 12 and returning on Tue, May 19.
  • At the moment, you can catch a nonstop flight from Sydney to Seattle with the following airlines, including: Virgin Australia Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Sydney to Seattle is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • To find best deals on flights from Sydney to Seattle, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Tue, May 12, with one-way flights priced at just $594.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is American Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Seattle travel is around January.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Sydney to Seattle is October, when demand for travel is lower.
  • After crunching the numbers on our May flight calendar, it's currently cheapest to fly from Sydney to Seattle on May 20, 2026 with American Airlines, with prices starting at $563.
  • You can land at any one of the following hubs in Seattle, with Sydney Airport to Seattle-Tacoma International Airport (SYD-SEA) is by far the most common option on this route: Seattle-Tacoma International Airport (SEA) King County (Boeing Field) International Airport (BFI) Kenmore Air Harbor Seaplane Base (LKE).
  • The time difference between Seattle and Sydney is 18h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

Explore More Popular Flights

Note: Prices shown on this page are estimated lowest price and include all taxes and fees found in the last 24 hours.

Book with no extra fees

Prices displayed in this page are all-inclusive prices (incl. taxes, fuel surcharge, civil aviation development fund, etc) with all fees confirmed before payment. Fees for luggage, meals, WLAN, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page were updated within last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy.
Cancellation/change due to a flight schedule change:
If the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.