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Find cheap United Airlines flights to Seattle

CMH — SEA
26 Aug — 2 Sep1
1 adult
1 adult, Economy, 0 bags

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Cheapest United Airlines flights from Australia to Seattle
Explore the most affordable United Airlines flight options available from Australia to Seattle. Find the lowest fares with prices last updated on 27 July 2026.

Thu 30/710:55
MEL
-
SEA
2 stops29h 15m
United Airlines
Wed 12/819:35
SEA
-
MEL
1 stop19h 40m
United Airlines
Deal found 27/7$1,321
Sun 9/809:30
MEL
-
SEA
2 stops28h 40m
United Airlines
Sat 22/815:30
SEA
-
MEL
1 stop23h 45m
United Airlines
Deal found 27/7$1,334
Mon 27/710:20
SYD
-
SEA
1 stop25h 27m
United Airlines
Sun 9/805:15
SEA
-
SYD
1 stop32h 40m
United Airlines
Deal found 26/7$1,364

Flights to Seattle with United Airlines at a glance

Find detailed information about United Airlines flights from Australia to Seattle. Explore the options provided by United Airlines to plan your journey from Australia to Seattle. Data last updated 27 July 2026.

Popular in

November

Cheapest in

March

Average price

$1,323

Return from

$1,334

One-way from

$804
Highest demand for flights to Seattle with United Airlines; 5% potential price increase.
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Best time to find cheap flights to Seattle with United Airlines; 2% potential price drop.
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Average price for flights to Seattle with United Airlines (return).
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United Airlines
  • United Airlines
  • 9/8-22/8
  • 3 total stops
  • 52h 25m total
  • Australia to Seattle
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United Airlines
  • United Airlines
  • 24/8
  • 1 total stop
  • 24h 34m total
  • Australia to Seattle
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Cheapflights Insights

Find cheap United Airlines flights to Seattle

How long is the flight to Seattle with United Airlines?

On average, United Airlines flights from Australia to Seattle take 23 hours 26 minutes. Flights to Seattle from other popular cities in Australia will vary in length. Below are a few examples of popular routes and their flight times.

When is the best time to book a flight to Seattle with United Airlines?

The best time to book a flight to Seattle with United Airlines is 45 days before departure. On average, fares are higher if you book 69 days before departure.

FAQs about flights to Seattle with United Airlines

  • Which airport do United Airlines flights arrive at when travelling to Seattle?

    United Airlines flights on this route tend to land at Seattle/Tacoma Intl Airport.

  • Is United Airlines the cheapest airline for a flight to Seattle?

    Flight prices will depend on factors like date, time, and cabin class, so it is worth comparing flights before booking. Based on Cheapflights data, the cheapest average return price for flights to Seattle tends to be with Alaska Airlines.

  • Are there alternative airlines other than United Airlines that fly to Seattle?

    Air Canada, Qantas Airways and Virgin Australia all fly to Seattle and offer an alternative to United Airlines.

  • How much is a United Airlines flight to Seattle?

    The average price for a return flight with United Airlines is $1,344, while a one-way flight costs around $730.

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Reviews of United Airlines

See what Cheapflights users have to say about their United Airlines experience.
United Airlines
7.4
Good
10,000 reviews
Check prices
Overview

Boarding

7.7

Entertainment

7.1

Food

6.6

Crew

8.1

Comfort

7.3

Popular United Airlines flights

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Fly your favourite airline to Seattle/Tacoma Intl

Fly your favorite airline to Seattle/Tacoma Intl. Flight routes are based on user searches made on Cheapflights and were last updated on 27 July 2026.
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