Cheap Flights from Seattle, WA to Sydney from $373

Return flight: Sydney – Seattle

On Cheapflightsplus.com you will find 767 connecting flights from Seattle to Sydney. You can compare airfare deals from 33 airlines and multiple travel sites from $373, book and save on cheap plane tickets and last minute offers. Also check out SEA-SYD flight schedule to find best flight time, convenient departure and arrival airports.

Find One-Way and Round-Trip Seattle to Sydney Flight Deals

To find the cheapest one way airline ticket select the date with the lowest price on the calendar below and click «Find Flights». To search for round-trip flight deals click on the link «Check prices for return flights» and select the date of the return flight. Cheapest flights in November: $373 (one-way), $640 (round-trip).
Direct flights
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Full flight schedule will help you in detecting at what time planes fly from Seattle to Sydney. You can also specify the concrete flights and airlines on the route and how long the flight actually is. Use the calendar for today, tomorrow or other specific date as some flights are available only on certain days of the week.
Departure Arrival Flight Details Flight Duration Price
05:00 — 06:55
+2 days
05:00 — 07:15 UA5657 United Airlines
Seattle — San Francisco
15h 45m stop
23:00 — 06:55 UA863 United Airlines
San Francisco — Sydney
32h 55m
including layover
Find flight
from$420
05:30 — 08:20
+2 days
05:45 — 06:56 AC8801 Air Canada
Seattle — Vancouver
16h stop
22:40 — 09:35 AC33 Air Canada
Vancouver — Sydney
32h 50m
including layover
Find flight
from$386
06:45 — 07:00
+2 days
06:45 — 09:29 UA1681 United Airlines
Seattle — Los Angeles
13h 16m stop
22:45 — 07:00 UA839 United Airlines
Los Angeles — Sydney
31h 15m
including layover
Find flight
from$420
06:45 — 07:00
+2 days
06:25 — 09:20 UA2127 United Airlines
Seattle — Los Angeles
13h 10m stop
22:50 — 07:00 UA839 United Airlines
Los Angeles — Sydney
31h 15m
including layover
Find flight
from$421
07:00 — 06:55
+2 days
07:00 — 09:19 UA2640 United Airlines
Seattle — San Francisco
13h 41m stop
23:00 — 06:55 UA863 United Airlines
San Francisco — Sydney
30h 55m
including layover
Find flight
from$420
07:00 — 06:55
+2 days
07:00 — 09:20 UA714 United Airlines
Seattle — San Francisco
13h 40m stop
23:00 — 06:55 UA863 United Airlines
San Francisco — Sydney
30h 55m
including layover
Find flight
from$424
08:00 — 06:05
+2 days
08:05 — 10:24 HA6903 Hawaiian Airlines
Seattle — San Francisco
10h 36m stop
22:00 — 06:05 QF74 Qantas
San Francisco — Sydney
28h 5m
including layover
Find flight
from$632
08:08 — 06:05
+2 days
08:08 — 10:22 AS1166 Alaska Airlines
Seattle — San Francisco
11h 28m stop
22:00 — 06:05 QF74 Qantas
San Francisco — Sydney
28h 57m
including layover
Find flight
from$418
09:05 — 06:55
+2 days
09:05 — 11:28 UA5707 United Airlines
Seattle — San Francisco
11h 32m stop
23:00 — 06:55 UA863 United Airlines
San Francisco — Sydney
28h 50m
including layover
Find flight
from$420
09:50 — 06:55
+2 days
09:45 — 12:01 UA1470 United Airlines
Seattle — San Francisco
10h 51m stop
23:00 — 06:55 UA863 United Airlines
San Francisco — Sydney
28h 5m
including layover
Find flight
from$420
10:00 — 08:20
+2 days
10:00 — 11:05 AC8803 Air Canada
Seattle — Vancouver
11h 30m stop
22:40 — 07:20 AC33 Air Canada
Vancouver — Sydney
28h 20m
including layover
Find flight
from$386
10:17 — 07:30
+2 days
10:17 — 13:10 AS505 Alaska Airlines
Seattle — Los Angeles
10h stop
23:10 — 07:30 QF12 Qantas
Los Angeles — Sydney
28h 13m
including layover
Find flight
from$416
11:25 — 19:45
+2 days
11:25 — 14:40 AS8027 Alaska Airlines
Seattle — Honolulu
22h 45m stop
12:45 — 19:45 AS8451 Alaska Airlines
Honolulu — Sydney
39h 20m
including layover
Find flight
from$577
11:30 — 06:05
+2 days
11:30 — 13:46 AS1112 Alaska Airlines
Seattle — San Francisco
8h 14m stop
22:00 — 06:05 QF74 Qantas
San Francisco — Sydney
25h 35m
including layover
Find flight
from$418
12:00 — 07:30
+2 days
12:00 — 14:46 AS1144 Alaska Airlines
Seattle — Los Angeles
8h 13m stop
23:10 — 07:30 QF12 Qantas
Los Angeles — Sydney
26h 30m
including layover
Find flight
from$411
12:52 — 06:55
+2 days
12:52 — 15:07 UA1482 United Airlines
Seattle — San Francisco
7h 53m stop
23:00 — 06:55 UA863 United Airlines
San Francisco — Sydney
25h 3m
including layover
Find flight
from$416
13:45 — 08:20
+2 days
13:45 — 14:50 AC8805 Air Canada
Seattle — Vancouver
7h 49m stop
22:40 — 07:20 AC33 Air Canada
Vancouver — Sydney
24h 35m
including layover
Find flight
from$386
14:50 — 06:55
+2 days
14:50 — 17:12 UA5482 United Airlines
Seattle — San Francisco
5h 48m stop
23:00 — 06:55 UA863 United Airlines
San Francisco — Sydney
23h 5m
including layover
Find flight
from$421
14:55 — 08:20
+2 days
15:05 — 16:15 AC8807 Air Canada
Seattle — Vancouver
6h 39m stop
22:40 — 09:35 AC33 Air Canada
Vancouver — Sydney
23h 25m
including layover
Find flight
from$386
15:23 — 06:55
+2 days
14:29 — 16:45 UA325 United Airlines
Seattle — San Francisco
5h 21m stop
23:00 — 06:55 UA863 United Airlines
San Francisco — Sydney
22h 32m
including layover
Find flight
from$416
15:46 — 06:05
+2 days
11:29 — 13:43 AS1284 Alaska Airlines
Seattle — San Francisco
2h 59m stop
22:00 — 06:05 QF74 Qantas
San Francisco — Sydney
20h 19m
including layover
Find flight
from$418
16:30 — 10:25
+2 days
16:30 — 19:00 NH117 All Nippon Airways
Seattle — Tokyo
3h 45m stop
22:45 — 09:25 NH879 All Nippon Airways
Tokyo — Sydney
23h 55m
including layover
Find flight
from$382
16:30 — 20:15
+2 days
16:30 — 19:00 NH117 All Nippon Airways
Seattle — Tokyo
13h 35m stop
08:35 — 19:15 NH889 All Nippon Airways
Tokyo — Sydney
33h 45m
including layover
Find flight
from$384
17:05 — 07:30
+2 days
17:05 — 19:54 AS1464 Alaska Airlines
Seattle — Los Angeles
3h 16m stop
23:10 — 07:30 QF12 Qantas
Los Angeles — Sydney
21h 25m
including layover
Find flight
from$414
17:15 — 07:30
+2 days
16:59 — 19:48 QF3738 Qantas
Seattle — Los Angeles
3h 10m stop
23:10 — 07:30 QF12 Qantas
Los Angeles — Sydney
21h 15m
including layover
Find flight
from$412
18:09 — 07:30
+2 days
10:12 — 12:58 AS1048 Alaska Airlines
Seattle — Los Angeles
2h 10m stop
23:10 — 07:30 QF12 Qantas
Los Angeles — Sydney
20h 21m
including layover
Find flight
from$416
18:09 — 07:05
+2 days
10:12 — 12:58 AS1048 Alaska Airlines
Seattle — Los Angeles
2h 15m stop
22:50 — 07:05 AS6973 Alaska Airlines
Los Angeles — Sydney
19h 56m
including layover
Find flight
from$495
19:15 — 08:20
+2 days
19:15 — 20:20 AC8809 Air Canada
Seattle — Vancouver
2h 19m stop
22:40 — 07:20 AC33 Air Canada
Vancouver — Sydney
19h 5m
including layover
Find flight
from$386
19:35 — 06:55
+2 days
19:35 — 21:49 UA2632 United Airlines
Seattle — San Francisco
1h 11m stop
23:00 — 06:55 UA863 United Airlines
San Francisco — Sydney
18h 20m
including layover
Find flight
from$416
20:40 — 19:45
+2 days
18:25 — 21:35 HA669 Hawaiian Airlines
Seattle — Honolulu
13h 31m stop
12:45 — 19:45 HA451 Hawaiian Airlines
Honolulu — Sydney
30h 5m
including layover
Find flight
from$560
20:47 — 19:45
+2 days
18:25 — 21:35 AS8169 Alaska Airlines
Seattle — Honolulu
11h 56m stop
12:45 — 19:45 AS8451 Alaska Airlines
Honolulu — Sydney
28h 58m
including layover
Find flight
from$575
21:15 — 07:30
+3 days
21:15 — 23:59 AS1292 Alaska Airlines
Seattle — Los Angeles
22h 11m stop
22:10 — 07:30 QF12 Qantas
Los Angeles — Sydney
40h 15m
including layover
Find flight
from$492
23:35 — 08:00
+3 days
22:35 — 04:45 PR125 Philippine Airlines
Seattle — Manila
17h 10m stop
22:20 — 09:30 PR211 Philippine Airlines
Manila — Sydney
39h 25m
including layover
Find flight
from$476
*Departure and arrival times - local. Updated on June 7, 2025

Flight Information

Below we will explain in detail what the flights cost on the destination from Seattle to Sydney depends on and how to choose the most interesting flight option for you.

Distance between Seattle and Sydney is 12472 miles. Time difference between the cities is 6h. Airplanes depart 00:20 to 23:59 from 3 Seattle airports and arrive 00:20 to 23:59 to 5 Sydney airports. Average flight time is 31h 55m.

  • The fastest flight 18h 20m
  • Average flight time 31h 55m
  • The earliest flight 00:20
  • The latest flight 23:59
  • Distance 7750 ml

The cheapest months to travel to Sydney are july (from 498 $), june (from 512 $), august (from 514 $).

The most expensive months are january (from 1 372 $), december (from 822 $), november (from 798 $).

What is the lowest airfare Seattle to Sydney?

The cheapest plane ticket found by our users is $373. This airfare is for economy class on one-way NH5391 flight by All Nippon Airways for July 6, 2025 which leaves Seattle-Tacoma Intl in Seattle at 13:45 am and arrives at Sydney Kingsford Smith at 10:25.

Economy class
$373
Find
Business class
?
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First class
?
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Popular Airlines on the Route

The flight Seattle — Sydney is served by 33 regular airlines and 5 low-cost airlines. Most of the flights on this route are operated by Japan Airlines - JAL - 13 departures per week at the price of from $ 564 . And the most expensive tickets are offered by Air New Zealand Limited airline - from $ 4288.

Direct flights

There’re no direct flights on this route. Try flights with stops.

Connecting Flights

There are 767 flights with layovers on the route. The fastest connecting flight is UA2632 by United Airlines takes 18h 20m and the cheapest is NH5391 by All Nippon Airways for $373.

  • PR - Philippine Airlines
    from $476
    Find
  • JL - Japan Airlines - JAL
    from $564
    Find
  • FJ - Air Pacific
    from $543
    Find
  • UA - United Airlines
    from $416
    Find
  • NZ - Air New Zealand Limited
    from $747
    Find
  • HU - Hainan Airlines
    from $732
    Find
  • JX - Jambojet
    from $465
    Find
  • BR - EVA Airways Corporation
    from $510
    Find
  • QF - Qantas
    from $412
    Find
  • KE - Korean Air
    from $477
    Find
  • MH - Malaysia Airlines
    from $1296
    Find
  • WS - WestJet
    from $846
    Find
See more connecting flights

Airports

You can fly from Seattle to Sydney from 3 airports (Boeing Field International Airport, Seattle-Tacoma Intl, Kenmore Air Harbor SPB).

Seattle airports

  • Boeing Field International Airport-BFI
    from $897
    Find
  • Seattle-Tacoma Intl-SEA
    from $373
    Find
  • Kenmore Air Harbor SPB-LKE
    Find

Sydney airports

  • Bankstown-BWU
    Find
  • Palm Beach SPB-LBH
    Find
  • Rose Bay-RSE
    Find
  • Kingsford Smith-SYD
    Find
  • Sydney West-SWZ
    Find

How to book a plane ticket yourself?

How to book an air ticket yourself?
  • Fill in the search parameters — cities of departure and destination, departure and return dates and click «Find flights»
  • Select the best flight that you like. Please, check the airports of departure and arrival. Select the best fare, but pay attention to the following flight details - airports of departure and arrival, flight duration and layovers. Please use filters and sort to find the best flight.
  • Click «Buy» when you are ready — our system will redirect you to the site that sells the selected flight ticket.
  • Fill in all passenger and payment information — passport and contact information, please double check all passengers’ names and make a payment for your itinerary.
  • That's it — you will receive an email with your e-ticket usually within 10 minutes after your flight is confirmed. Please, print the e-ticket and have it with you at the airport. You would need to have only a passport and/or a required form of ID to travel. Please, check your Visa requirements if you travel outside of the United States or Canada.

    To find a plane ticket, please select dates.

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