$901 Cheap Flights from Philadelphia (PHL) to Adelaide (ADL)

View $901 flight on Sat, Feb 28, 2026Opens in a new window

Popular airlines from Philadelphia Intl. Airport (PHL) to Adelaide, SA Airport (ADL)

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Cheap Flights from Philadelphia to Adelaide (PHL-ADL)

Prices were available within the past 7 days and start at $901 for one-way flights and $1,432 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Fiji Airways
Thu, Feb 5 - Sat, Feb 21
PHL
Philadelphia
ADL
Adelaide
$1,432 Roundtrip, found 19 hours ago
$1,432
Roundtrip
found 19 hours ago
Select Fiji Airways flight, departing Thu, Feb 5 from Philadelphia to Adelaide, returning Sat, Feb 21, priced at $1,432 found 19 hours ago
American Airlines
Thu, Oct 23 - Thu, Nov 6
PHL
Philadelphia
ADL
Adelaide
$1,438 Roundtrip, found 2 days ago
$1,438
Roundtrip
found 2 days ago
Select American Airlines flight, departing Thu, Oct 23 from Philadelphia to Adelaide, returning Thu, Nov 6, priced at $1,438 found 2 days ago
Fiji Airways
Sat, Oct 25 - Sat, Nov 1
PHL
Philadelphia
ADL
Adelaide
$1,456 Roundtrip, found 3 days ago
$1,456
Roundtrip
found 3 days ago
Select Fiji Airways flight, departing Sat, Oct 25 from Philadelphia to Adelaide, returning Sat, Nov 1, priced at $1,456 found 3 days ago
Fiji Airways
Tue, Oct 21 - Thu, Nov 6
PHL
Philadelphia
ADL
Adelaide
$1,460 Roundtrip, found 3 days ago
$1,460
Roundtrip
found 3 days ago
Select Fiji Airways flight, departing Tue, Oct 21 from Philadelphia to Adelaide, returning Thu, Nov 6, priced at $1,460 found 3 days ago
Fiji Airways
Tue, Oct 21 - Sat, Nov 1
PHL
Philadelphia
ADL
Adelaide
$1,478 Roundtrip, found 3 days ago
$1,478
Roundtrip
found 3 days ago
Select Fiji Airways flight, departing Tue, Oct 21 from Philadelphia to Adelaide, returning Sat, Nov 1, priced at $1,478 found 3 days ago
Fiji Airways
Tue, Oct 21 - Thu, Nov 6
PHL
Philadelphia
ADL
Adelaide
$1,485 Roundtrip, found 2 days ago
$1,485
Roundtrip
found 2 days ago
Select Fiji Airways flight, departing Tue, Oct 21 from Philadelphia to Adelaide, returning Thu, Nov 6, priced at $1,485 found 2 days ago
American Airlines
Thu, Oct 23 - Sat, Nov 8
PHL
Philadelphia
ADL
Adelaide
$1,528 Roundtrip, found 2 days ago
$1,528
Roundtrip
found 2 days ago
Select American Airlines flight, departing Thu, Oct 23 from Philadelphia to Adelaide, returning Sat, Nov 8, priced at $1,528 found 2 days ago
Air New Zealand
Thu, Dec 4 - Sun, Jan 18
PHL
Philadelphia
ADL
Adelaide
$1,534 Roundtrip, found 3 hours ago
$1,534
Roundtrip
found 3 hours ago
Select Air New Zealand flight, departing Thu, Dec 4 from Philadelphia to Adelaide, returning Sun, Jan 18, priced at $1,534 found 3 hours ago
Air Canada
Sun, Feb 8 - Mon, Feb 23
PHL
Philadelphia
ADL
Adelaide
$1,606 Roundtrip, found 19 hours ago
$1,606
Roundtrip
found 19 hours ago
Select Air Canada flight, departing Sun, Feb 8 from Philadelphia to Adelaide, returning Mon, Feb 23, priced at $1,606 found 19 hours ago
Cathay Pacific
Mon, Feb 9 - Fri, Feb 20
PHL
Philadelphia
ADL
Adelaide
$1,733 Roundtrip, found 19 hours ago
$1,733
Roundtrip
found 19 hours ago
Select Cathay Pacific flight, departing Mon, Feb 9 from Philadelphia to Adelaide, returning Fri, Feb 20, priced at $1,733 found 19 hours ago
Flights from Philadelphia (PHL) to Adelaide (ADL)
Origin airport
Philadelphia Intl.
Destination airport
Adelaide
Airlines serving
Air Canada, Air New Zealand, American Airlines, Cathay Pacific, Fiji Airways, Malaysia Airlines, Qantas Airways, Qatar Airways, United
Roundtrip price
$1,431
Distance
10563 mi

Philadelphia to Adelaide Flights

The cheapest times to fly from Philadelphia to Adelaide

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Philadelphia to Adelaide are during the month of February. You can find some of the cheapest flights from Philadelphia to Adelaide with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Philadelphia to Adelaide

Sunday is one of the best days to book for cheap flights from Philadelphia to Adelaide: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Philadelphia to Adelaide

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Philadelphia to Adelaide in 2025. You can also book with separate airlines for your outbound and return journeys, from $901 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Philadelphia to Adelaide flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Philadelphia to Adelaide airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Philadelphia Intl. Airport (PHL) to Adelaide Airport (ADL) cost?
Secure a cheap one-way flight from $901 or cheap return flight from $1,432 from Philadelphia Intl. Airport (PHL) to Adelaide Airport (ADL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Philadelphia Intl. Airport (PHL) to Adelaide Airport (ADL)?
February is the most affordable month to fly from PHL to ADL. Traveling outside of peak seasons is often the key to landing a great deal.
What is the cheapest airline that flies from Philadelphia Intl. Airport (PHL) to Adelaide Airport (ADL)?
To find the cheapest airline flying from PHL to ADL, use Expedia's filter tool. Tailor your search based on what matters most to you, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Philadelphia Intl. Airport (PHL) to Adelaide Airport (ADL)?
Direct flights from Philadelphia Intl. Airport (PHL) to Adelaide Airport (ADL) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel details and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from PHL to ADL?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Remember that flight schedules can change depending on various factors, including the season and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Philadelphia Intl. Airport (PHL) to Adelaide Airport (ADL)?
Book a flight from Philadelphia Intl. Airport (PHL) to Adelaide Airport (ADL) that takes off before 3 PM to reduce the risk of cancellations. Departures after this hour have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Philadelphia Intl. Airport (PHL) to Adelaide Airport (ADL) last-minute?
Last-minute bookings from PHL to ADL are usually more expensive. To lock in the lowest prices, start looking for flights ahead of time. That being said, if your travel plans are flexible, it's possible to find a cheap fare just before your departure.
Is it cheaper to book a PHL to ADL flight and hotel package?
Compared with arranging hotels and flights separately, booking a PHL to ADL flight and hotel package with Expedia could result in significant savings. Better still, having everything in one easy place will take the stress out of travel planning. Simply secure your flights and choose from our wide range of hotels, then personalize your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Philadelphia Intl. Airport (PHL) to Adelaide Airport (ADL)?
It's generally possible to cancel or reschedule your PHL to ADL flight. However, for bookings made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more details on our Customer Service portal.

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*Available to One Key members.