Cheap flights from Seattle to Adelaide from $637
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 Adelaide departing on 4/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Deals available from 900+ travel sites.
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 Adelaide
Cheap round-trip flights
Cheap one-way flights
Air New Zealand flights from Seattle to Adelaide
Our best Air New Zealand deals on Seattle to Adelaide flight tickets
Qatar Airways flights from Seattle to Adelaide
Our best Qatar Airways deals on Seattle to Adelaide flight tickets
See travel insights to Adelaide from
How to get the cheapest flight ticket from Seattle to Adelaide
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 Adelaide?
The cheapest month to fly to Adelaide from Seattle is in August. Flight prices, which tend to average around $1,211, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of August, then book flights to Adelaide from Seattle during October instead. Flights to Adelaide in October, while not as cheap as those in August, still average around $1,247.
What is the cheapest day to depart on your flight to Adelaide?
The cheapest day to depart on your flight to Adelaide is on a Wednesday when prices can be found for as low as $1,293. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Adelaide is Friday, with ticket prices averaging around $1,570.
When to book flights from Seattle to Adelaide
Cheap Seattle to Adelaide (SEA to ADL) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Seattle to Adelaide
How far is Seattle/Tacoma Intl to Adelaide by plane?
A flight from Seattle/Tacoma Intl to Adelaide will travel around 8330.9 mi. Flights usually cover this in 22h 46m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Adelaide Airport?
Prices for flights from Seattle/Tacoma Intl Airport to Adelaide Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Adelaide Airport?
As of February 2025, there are 2 operators available to choose from for flights from Seattle/Tacoma Intl Airport to Adelaide Airport.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Adelaide Airport?
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 Adelaide Airport.
What documentation or ID do you need to fly to Adelaide Airport?
The travel and health documents required for your trip to Adelaide Airport 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 Adelaide Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Seattle to Adelaide?
momondo data reveals that the most frequently booked airline on the route from Seattle to Adelaide is United Airlines, representing 53% of all bookings. The subsequent popular airline is Air New Zealand at 47%.
Best airlines flying from Seattle to Adelaide
Compare and see reviews for airlines that fly from Seattle to Adelaide with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $1,208 | Free Cancellation | Rating 7.9 461 reviews | |||
| PriceFrom $1,211 | Free Cancellation | Rating 7.4 8,765 reviews |
Traveling to a place near Adelaide?
Book flights to Adelaide if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Seattle to Adelaide?
Finding the right flight to Adelaide from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Adelaide quick and easy, saving you time and money.
Can I find flights from Seattle to Adelaide with flexible booking policies on momondo?
Flights from Seattle to Adelaide with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Seattle to Adelaide?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Adelaide from Seattle.
I’m not ready to book a flight from Seattle to Adelaide right now. Can momondo alert me if prices change?
If you are not ready to book a flight from Seattle to Adelaide now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Adelaide and let you know when they change.