Are direct flights from Seattle to Adelaide always the best option?

Direct flights offer convenience by reducing travel time and avoiding layovers. However, they are not always the cheapest option. Flights with one or more stops can often be more budget-friendly, depending on your priorities for cost versus travel duration.

Can flexible travel dates help on Seattle to Adelaide flights?

Yes, being flexible with your travel dates can significantly impact flight prices. Flying during off-peak seasons or on less popular days of the week often results in lower fares. Adjusting your departure or return by even a few days may reveal cheaper options.

What extra costs should I check before booking Seattle to Adelaide flights?

Before booking, always check for potential extra costs such as baggage fees, seat selection charges, and in-flight services. Some airlines may also charge for printing boarding passes at the airport. Being aware of these additional fees can help you budget accurately for your trip.

Flights From Seattle

To Adelaide

Cheap Flights from Seattle to Adelaide

Browse current best options from Seattle. Become a member to unlock all deals and get alerts when new deals appear.

Deals from

Seattle

RatePunk searches hundreds of travel sites at once for deals on flights to Adelaide

Prices updated 6 days ago

402 airlines compared

80%+ AI score for best value

Fares are subject to change and may not be available for all dates. (Data last updated Jul 19, 2026.)

Today’s best flight deals from Seattle to Adelaide

Explore current cheapest deals departing from Seattle to Adelaide

Round trip

Sort by: Cheapest

August 5 - August 19

Cheapest

Best

Earliest

SEA - Adelaide

$1,286

$1,166

Round trip

August 20 - August 27

Best

SEA - Adelaide

$1,347

$1,262

Round trip

August 5 - August 14

Earliest

SEA - Adelaide

$1,313

$1,281

Round trip

August 19 - August 25

SEA - Adelaide

$1,353

$1,294

Round trip

August 12 - September 1

SEA - Adelaide

$1,259

$1,310

Round trip

August 13 - August 19

SEA - Adelaide

$1,367

$1,318

Round trip

August 12 - August 18

SEA - Adelaide

$1,368

$1,354

Round trip

August 14 - August 20

SEA - Adelaide

$1,353

$1,387

Round trip

November 12 - November 30

SEA - Adelaide

$1,281

$1,395

Round trip

August 11 - August 25

SEA - Adelaide

$1,293

$1,412

Round trip

Unlock all 500+ flight deals to Adelaide and get alerts when great deals appear

Seattle to Adelaide: Overview

Insights for flights from Seattle to Adelaide

Most itineraries for flights from Seattle to Adelaide connect at least once, as non-stop options make up 0% of recent fares. For those connecting itineraries, the typical number of stopovers is 2.

When considering cheap flights from Seattle to Adelaide, fares typically range from $1537–$2029, with a median of $1854. Right now, current fares are near the typical level for this route. However, 0% of recent fares have been classified as a good price, indicating that finding deals can be challenging.

If you are looking for the cheapest time to fly from Seattle to Adelaide, December stands out with a median fare of $620. Other cost-effective months include June, with a median fare of $717, and May, where the median fare is $776.

A typical journey from Seattle to Adelaide takes approximately 31h 51m, including connections. This is a long-haul route, covering a substantial distance of 13419 km between the two cities. New deals for this route show up several times a week, so keeping an eye on price alerts can be beneficial.

How much is a round trip from Seattle to Adelaide

Regular price: $1,147 - $2,013

Prices for flights from Seattle to Adelaide are currently within the regular range.

The regular price range for flights from Seattle to Adelaide is between $1147 and $2013. The current lowest deal is $1262 with QantasLink, for travel from Aug 20-Aug 27.

now $1,262

Low $1,147

High $2,013

The cheapest time to fly from Seattle to Adelaide

The cheapest month to fly from Seattle to Adelaide is March, with a median price of $587. The most expensive month is July, with a median price of $2021. Prices are generally lower from February to October.

March

Cheapest

Flights from $587

July

Most Expensive

Flights from $2,021

Jan

Feb

Mar

Apr

May

Jun

Jul

Oct

Nov

Direct flights from Seattle to Adelaide

QantasLink

Alaska Airlines, Inc.

Qatar Airways

Air Canada

Last-minute flights going from Seattle to Adelaide

Mon, Jul 13

⌛ Last-Minute

SEA - Adelaide

Seattle (SEA) - Adelaide (ADL)

Cathay Pacific

$1,742

$3,011

One-way

Tue, Jul 14

⌛ Last-Minute

SEA - Adelaide

Seattle (SEA) - Adelaide (ADL)

All Nippon Airways

$1,544

$1,535

One-way

Tue, Jul 14

⌛ Last-Minute

SEA - Adelaide

Seattle (SEA) - Adelaide (ADL)

QantasLink

$1,725

$3,800

One-way

Thu, Jul 16

⌛ Last-Minute

SEA - Adelaide

Seattle (SEA) - Adelaide (ADL)

Alaska Airlines, Inc.

$1,744

$4,425

One-way

Sun, Jul 19

⌛ Last-Minute

SEA - Adelaide

Seattle (SEA) - Adelaide (ADL)

Alaska Airlines, Inc.

$1,624

$1,751

One-way

Wed, Jul 22

⌛ Last-Minute

SEA - Adelaide

Seattle (SEA) - Adelaide (ADL)

QantasLink, Jetstar

$1,451

$1,485

One-way

Biggest price drops on these dates for flights from Seattle to Adelaide

3 nights

Jul 24 - Jul 27

$1,654 → $1,314

21%

7 nights

Aug 20 - Aug 27

$1,339 → $1,262

2 nights

Aug 4 - Aug 6

$1,499 → $1,461

9 nights

Aug 5 - Aug 14

$1,317 → $1,281

Popular Airports to fly from Seattle to Adelaide

Seattle - Adelaide route insights

💸 Price insights

Recent fares near the typical level

Recent fares from Seattle to Adelaide are near the typical level of $1854.

📅 Best time to fly

March is historically cheapest at $587

Historically, March is the cheapest month to fly from Seattle to Adelaide, with a median price of $587.

⏱️ Flight duration

Connecting flights average 31h 51m

Connecting flights from Seattle to Adelaide typically average 31h 51m.

✈️ Airlines & availability

Connecting flights are dominant

There are no direct flights; connecting flights are dominant for this route.

🏆 Airline highlight

QantasLink offers recent deals

QantasLink has offered recent deals on connecting flights from Seattle to Adelaide.

🎯 Booking tip

Deals appear regularly

Deals for flights from Seattle to Adelaide appear regularly.

Seattle main airports to depart from

Seattle–Tacoma International (SEA)

Cheapest

Seattle–Tacoma International Airport is a good option for flights from Seattle to Adelaide.

📍 ~18 km from Seattle city center (reachable by car or train)

💸 Flights from ~$1,224

Boeing Field (BFI)

Boeing Field is an alternative departure airport for flights from Seattle to Adelaide.

📍 ~9 km from Seattle city center (reachable by car)

💸 Flights from ~$1,920

Kenmore Air Harbor Seaplane Base (LKE)

Kenmore Air Harbor Seaplane Base offers another departure point for your journey to Adelaide.

📍 ~3 km from Seattle city center (reachable by car)

💸 Flights from ~$2,781

Adelaide main airports to arrive at

Adelaide (ADL)

Cheapest

Adelaide Airport is a convenient arrival point for flights from Seattle to Adelaide.

📍 ~7 km from city center (reachable by car)

💸 Flights from ~$1,224

Airports nearby Adelaide used as alternative

Melbourne (MEL)

Cheapest

Melbourne Airport (MEL) is a major international hub with significantly more flight options than Adelaide.

📍 ~650 km from Adelaide (requires approximately 8 hours of driving or a short connecting flight)

💸 Flights from ~$985

Mildura (MQL)

Mildura Airport (MQL) is the closest significant regional hub with interstate connections to Melbourne and Sydney.

📍 ~350 km from Adelaide (reachable by car)

💸 Flights from ~$1,521

Mount Gambier (MGB)

Mount Gambier Airport (MGB) is a major regional airport providing alternative access to the southeastern region.

📍 ~380 km from Adelaide (reachable by car)

💸 Flights from ~$1,562

Avalon (AVV)

Avalon Airport (AVV) is a secondary airport for the Melbourne region, often used by low-cost carriers.

📍 ~600 km from Adelaide (reachable by car)

💸 Flights from ~$1,214

Port Lincoln (PLO)

Port Lincoln Airport (PLO) is a significant regional airport in South Australia with reliable regional service.

📍 ~250 km from Adelaide (requires a long drive or a flight)

💸 Flights from ~$1,752

Business & First Class Flight Deals to Adelaide

Adelaide, Australia

66% AI deal score

$19,840

From SEA

Elite

Sep 21

Adelaide, Australia

66% AI deal score

$20,516

Frequently Asked Questions About Flights to Adelaide

To find more affordable flights, consider being flexible with your travel dates and comparing prices across different airlines and booking sites. Setting up price alerts can also notify you when fares drop. Looking into flights with layovers may also present cheaper options.

Booking in advance often provides better prices, though the ideal booking window can vary. Prices may fluctuate, so monitoring fares over time can help you identify a good deal. Weekday bookings sometimes offer different pricing compared to weekends.

Comparing nearby airports can sometimes reveal more affordable flight options or alternative routes. While it may add to your ground travel time, the potential savings could be significant. Always factor in the cost and convenience of transportation to and from alternative airports.

Related routes

Consider alternative routes from Seattle

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