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Find cheap United Airlines flights to Seattle from $665

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Flights Deals

Cheap United Airlines Flight Deals to Seattle

 
Here are some of the best deals found on KAYAK recently from United Airlines to Seattle 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 United Airlines flight deals to Seattle

KAYAK's recommended return flight United Airlines deals departing in the coming months to Seattle.
Discover the best prices for you by selecting your travel dates on KAYAK.
United Airlines Logo
09:30 - 14:01SYD-SEA
21h 31m1 stop
United Airlines Logo
17:14 - 07:00SEA-SYD
20h 46m1 stop
$1,240United Airlines
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Thu, 19 Jun - Sat, 28 Jun
United Airlines Logo
09:30 - 21:11SYD-SEA
28h 41m2 stops
United Airlines Logo
06:25 - 07:00SEA-SYD
31h 35m1 stop
$1,241United Airlines
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Sun, 15 Jun - Wed, 25 Jun
United Airlines Logo
09:30 - 21:11SYD-SEA
28h 41m2 stops
United Airlines Logo
05:15 - 07:00SEA-SYD
32h 45m2 stops
$1,262United Airlines
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Sat, 14 Jun - Sun, 22 Jun
United Airlines Logo
09:30 - 15:54SYD-SEA
23h 24m2 stops
United Airlines Logo
19:34 - 06:55SEA-SYD
18h 21m1 stop
$1,351United Airlines
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Thu, 7 Aug - Mon, 1 Sep
United Airlines Logo
09:30 - 09:43SYD-SEA
41h 13m2 stops
United Airlines Logo
10:55 - 07:00SEA-SYD
27h 05m2 stops
$1,401United Airlines
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Mon, 1 Sep - Fri, 12 Sep
United Airlines Logo
09:30 - 14:01SYD-SEA
21h 31m1 stop
United Airlines Logo
17:14 - 07:00SEA-SYD
20h 46m1 stop
$1,663United Airlines
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Wed, 18 Jun - Wed, 18 Jun
United Airlines Logo
10:20 - 08:48SYD-SEA
39h 28m1 stop
United Airlines Logo
06:45 - 07:00SEA-SYD
31h 15m1 stop
$1,686United Airlines
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Thu, 26 Jun - Wed, 16 Jul
United Airlines Logo
09:30 - 09:43SYD-SEA
41h 13m2 stops
United Airlines Logo
12:43 - 07:00SEA-SYD
25h 17m2 stops
$1,691United Airlines
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Mon, 1 Sep - Tue, 9 Sep
United Airlines Logo
09:30 - 17:52SYD-SEA
25h 22m2 stops
United Airlines Logo
19:34 - 06:55SEA-SYD
18h 21m1 stop
$1,761United Airlines
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Sat, 6 Sep - Wed, 10 Sep
United Airlines Logo
16:30 - 21:58ADL-SEA
45h 58m2 stops
United Airlines Logo
12:35 - 11:05SEA-ADL
30h 00m2 stops
$1,764United Airlines
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Sat, 7 Jun - Wed, 25 Jun
Useful Info

Good to know

Low season

January

High season

June

Cheapest flight

$665

Average price round-trip

$2,142
Best time to beat the crowds (1% less expensive on average)
Most popular time to fly (3% more expensive on average)
Flight from Sydney to Seattle
(price for this month)

When to book flights with United Airlines to Seattle

Average price per month
Flight prices as travel date approaches

FAQs for flying to Seattle with United Airlines

  • Which airport do United Airlines flights to Seattle fly into?

    You’ll fly into Seattle/Tacoma Airport when flying to Seattle with United Airlines.

  • Are there any other airlines in Star Alliance that fly to Seattle?

    Unfortunately, there are no other airlines in Star Alliance that fly to Seattle.

United Airlines customer reviews

7.4
GoodBased on 8,696 verified guest reviews
7.7Boarding
7.3Comfort
6.6Food
7.1Entertainment
8.1Crew

Pros +
Cons -

Show reviews that mention
Traveller rating:
Sort by:
A
8.0 Very Good
Everything
D
10.0 Wonderful
No issues, great flight, great crew
V
10.0 Wonderful
Friendly crew, all very smooth
V
8.0 Very Good
Crew friendly and efficient. Nobody seated next to me
B
2.0 Poor
Our flights got changed from United to Air Canada and our purchased seats did not get transferred so we had to pay for seats twice. I brought it up with Air Canada and they stated I had to go back and chase it with United. The united seats were $21 Canadian each and Air Canada were $56 each so we have paid $77 for each seat. Very unhappy
A
10.0 Wonderful
Everything is good except the dinner and breakfast. The sandwich is very delicious. Toilet is clean, I only use one of them. Flight attendants are very nice. 👍👍
A
8.0 Very Good
A bit rush for transit. Food and entertainment are not available
A
8.0 Very Good
So far so good but food and entertainment are not available for this flight
D
10.0 Wonderful
Boarding was a little difficult. The gate area at O'Hare was very small and crowded due to multiple gates in the area. Could not hear the intercom, so had to rely on signage to see when my group was boarding and the signage was blocked by passengers standing in the gate. Flight was great and we arrived in Montreal on time.
L
8.0 Very Good
Good

Everything you need to know for your flight to Seattle

Other airlines flying to Seattle

Flight deals from the most popular airlines with KAYAK users flying the route

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