Cheap flights from Seattle to Australia from $395
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Australia departing on 9/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Seattle to Australia
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Qantas Airways flights from Seattle to Australia
Our best Qantas Airways deals on Seattle to Australia flight tickets
United Airlines flights from Seattle to Australia
Our best United Airlines deals on Seattle to Australia flight tickets
See travel insights to Australia from
How to get the cheapest flight ticket from Seattle to Australia
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Australia?
The month of March is, on average, the cheapest month to fly to Australia from Seattle, with most prices found around $1,030. If you aren’t able to travel during the month of March, then book flights to Australia from Seattle during February instead. Flights to Australia in February, while not as cheap as those in March, still average around $1,048.
What is the cheapest day to depart on your flight to Australia?
The cheapest day to depart from Seattle to Australia is on a Tuesday. Travelers who choose to depart for Australia on a Tuesday will often find tickets for as low as $1,078. On the other hand, Thursday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,156.
What is the cheapest time of day to depart on your flight to Australia?
Flying to Australia from Seattle in the evening is the least expensive time of day to depart. momondo users have found prices as low as $1,078 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $1,152 on average. Flights to Australia from Seattle in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.
How far in advance should I book a flight to Australia?
You are more likely to see cheaper flights to Australia from Seattle when booking 24 weeks ahead of your departure date. In general, you can expect to find flights to Australia for around $1,138 when searching 24 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Australia from Seattle for as low as $994 on momondo.
What is the cheapest airline that flies from Seattle/Tacoma Intl to Australia?
Air Canada, Qantas Airways, and Delta are the most popular carriers operating from Seattle/Tacoma Intl to Australia
What airlines fly to Australia?
United Airlines, Air Canada and Delta are the top three most popular airlines that fly to Australia from Seattle according to our data. United Airlines is the first choice among our users, with 40% of people opting to fly with this airline when traveling to Australia. Keep in mind that there are 10 different airlines that fly to Australia on a routine basis, so you have a few additional options to choose from.
Cheap Seattle to Australia flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Seattle to Australia
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Australia?
Prices for flights from Seattle/Tacoma Intl Airport to Australia are refreshed on a daily basis.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Australia?
As of June 2025, there are 10 operators available to choose from for flights from Seattle/Tacoma Intl Airport to Australia.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Australia?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Australia.
What documentation or ID do you need to fly to Australia?
The travel and health documents required for your trip to Australia can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Australia. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
Best airlines flying from Seattle to Australia
Compare and see reviews for airlines that fly from Seattle to Australia with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $647 | Free Cancellation | Rating 7.5 854 reviews | |||
| PriceFrom $791 | Free Cancellation | Rating 8.3 882 reviews | |||
| PriceFrom $807 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $831 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $833 | Free Cancellation | Rating 7.1 9,537 reviews | |||
| PriceFrom $858 | Free Cancellation | Rating 7.8 2,494 reviews | |||
| PriceFrom $859 | Free Cancellation | Rating 8.0 7,946 reviews | |||
| PriceFrom $911 | Free Cancellation | Rating 8.0 10,000 reviews | |||
| PriceFrom $1,251 | Free Cancellation | Rating 8.1 1,302 reviews | |||
| PriceFrom $1,315 | Free Cancellation | Rating 7.4 3,584 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Seattle to Australia?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Australia. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Seattle to Australia with flexible booking policies on momondo?
All flight searches from Seattle to Australia on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Seattle to Australia?
momondo helps you find the best flight between Seattle and Australia by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from Seattle to Australia right now. Can momondo alert me if prices change?
If you are simply researching potential flights to Australia, momondo offers a useful price alert feature which will track prices for flights to Australia from Seattle and alert you when they change.