PHL - SYD

$426 Find Cheap Flights from Philadelphia to Sydney

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to Sydney departing on 1/20. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Sydney.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Sydney.
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Flight Deals

Cheap Flights from Philadelphia to Sydney (PHL-SYD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Philadelphia to Sydney that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Philadelphia to Sydney

Tue, Nov 11 - Tue, Nov 18
United Airlines Logo
8:15 am - 9:15 amPHL-SYD
33h 00m2 stops
United Airlines Logo
11:50 am - 4:41 pmSYD-PHL
20h 51m1 stop
$851United Airlines
Find Deal
Tue, Nov 11 - Fri, Nov 21
United Airlines Logo
8:15 am - 7:00 amPHL-SYD
30h 45m1 stop
United Airlines Logo
11:50 am - 10:46 pmSYD-PHL
26h 56m1 stop
$854United Airlines
Find Deal
Tue, Nov 25 - Tue, Dec 2
United Airlines Logo
3:00 pm - 9:15 amPHL-SYD
26h 15m2 stops
United Airlines Logo
11:50 am - 12:07 pmSYD-PHL
40h 17m2 stops
$855United Airlines
Find Deal
Wed, Nov 26 - Mon, Dec 15
Qantas Airways Logo
3:45 pm - 9:00 amPHL-SYD
25h 15m1 stop
Qantas Airways Logo
2:05 pm - 10:41 pmSYD-PHL
24h 36m1 stop
$1,020Qantas Airways
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Sun, Dec 7 - Mon, Dec 22
American Airlines Logo
4:04 pm - 9:00 amPHL-SYD
24h 56m2 stops
American Airlines Logo
11:20 am - 8:00 pmSYD-PHL
24h 40m1 stop
$1,036American Airlines
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Sun, Dec 7 - Mon, Dec 22
American Airlines Logo
3:13 pm - 9:00 amPHL-SYD
25h 47m1 stop
American Airlines Logo
11:20 am - 5:30 pmSYD-PHL
22h 10m1 stop
$1,038American Airlines
Find Deal
Tue, Nov 25 - Tue, Dec 2
Qantas Airways Logo
3:45 pm - 9:00 amPHL-SYD
25h 15m1 stop
Qantas Airways Logo
11:20 am - 5:44 pmSYD-PHL
22h 24m1 stop
$1,045Qantas Airways
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Sun, Dec 7 - Mon, Dec 22
Delta Logo
12:22 pm - 8:30 amPHL-SYD
28h 08m2 stops
Delta Logo
10:40 am - 8:33 pmSYD-PHL
25h 53m2 stops
$1,055Delta
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Fri, Nov 28 - Thu, Dec 11
Air Canada Logo
3:30 pm - 9:35 amPHL-SYD
26h 05m2 stops
Air Canada Logo
11:20 am - 2:50 pmSYD-PHL
43h 30m2 stops
$1,076Air Canada
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Fri, Nov 28 - Thu, Dec 11
Air Canada Logo
3:30 pm - 9:35 amPHL-SYD
50h 05m3 stops
Air Canada Logo
4:00 pm - 2:50 pmSYD-PHL
38h 50m2 stops
$1,082Air Canada
Find Deal

Everything you should know

Top airlines
United Airlines
Cheapest • from $851 (round-trip)
Fiji Airways
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 8% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
February
Cheapest • 27% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$851
Overall average: $1,379
United Airlines
Tue 11/11Tue 11/18
PHL - SYD • 2 stops
Cheapest one-way
$426
Typical prices: $1,009-$1,062
United Airlines
Tue 1/20
PHL - SYD • 2 stops
Start a new search
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We hope you love your trip to Sydney!
Booking Insights

KAYAK's insights & trends for Philadelphia to Sydney flights

Get data-powered insights and trends into flights from Philadelphia to Sydney to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Philadelphia to Sydney?

The average price of all round-trip flights from Philadelphia to Sydney clicked on KAYAK for each day over the last 12 months.

When flying from Philadelphia to Sydney, you should consider leaving on a Sunday and avoid Thursdays if you are looking for the best rates. For your return to Philadelphia, you’ll find the best rates on Thursdays and the most expensive ones on Saturdays.

What is the cheapest month to fly from Philadelphia to Sydney?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Philadelphia to Sydney, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Philadelphia to Sydney is February, where tickets cost $1,093 (return) on average. On the other hand, the most expensive months are December and January, where the average cost of round-trip tickets is $2,049 and $1,979 respectively.

How far in advance should I book a flight from Philadelphia to Sydney?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Philadelphia to Sydney, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Philadelphia to Sydney, you should book around 2 weeks before departure, which saves you about 8% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Good to know

Low seasonSeptember
Cheapest flight$426
Best time to beat the crowds with an average 25% drop in price.
Most popular time to fly with an average 1% increase in price.
Flight from Philadelphia to Sydney

When to book flights from Philadelphia to Sydney

Are your dates flexible? Find out the best times to travel from Philadelphia to Sydney based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Philadelphia to Sydney

  • Can I pre-select my seat when flying Qantas Airways from Philadelphia to Sydney?

    Yes, when flying Qantas Airways from Philadelphia to Sydney, you can pre-select your seat. Qantas allows passengers to choose their seats in advance during the booking process or at a later time through their website or mobile app.

  • How does Qantas Airways support sustainable travel on flights from Philadelphia to Sydney?

    Qantas Airways supports sustainable travel on flights from Philadelphia to Sydney by implementing fuel-efficient aircraft, promoting carbon offset programs for passengers, and investing in renewable energy projects. They also prioritize waste reduction and recycling efforts to minimize their environmental impact.

  • Can I rent a car after my flight from Philadelphia to Sydney?

    Yes, you can rent a car after your flight from Philadelphia to Sydney. Several rental companies operate in Sydney, including major international brands such as Hertz, Avis, Budget, Enterprise, and Europcar. These companies offer a wide range of vehicles to choose from, ensuring you can find a car that suits your needs and preferences. Simply check with the respective rental company for availability, rates, and booking details.

  • What are the in-flight entertainment amenities available on American Airlines flights from Philadelphia to Sydney?

    American Airlines offers a range of in-flight entertainment amenities on flights from Philadelphia to Sydney. Passengers can enjoy a variety of movies, TV shows, music, and games on personal seatback screens, along with free internet connectivity for browsing and streaming content.

  • What is the cheapest flight from Philadelphia to Sydney?

    In the last 3 days, the lowest price for a flight from Philadelphia to Sydney was $426 for a one-way ticket and $851 for a round-trip.

  • Do I need a passport to fly between Philadelphia and Sydney?

    Yes

  • Which airports will I be using when flying from Philadelphia to Sydney?

    Philadelphia and Sydney are both served by 1 main airport. You will leave Philadelphia from Philadelphia and will be arriving at Sydney Kingsford Smith.

  • Which aircraft models fly most regularly from Philadelphia to Sydney?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Philadelphia to Sydney?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between Philadelphia and Sydney, with SkyTeam being the most commonly used for this route.

  • What is the most popular layover when flying to Sydney from Philadelphia?

    Los Angeles is the most popular layover city among KAYAK users traveling from Philadelphia to Sydney.

  • Which is the best airline for flights from Philadelphia to Sydney, Fiji Airways or Air New Zealand?

    The two airlines most popular with KAYAK users for flights from Philadelphia to Sydney are Fiji Airways and Air New Zealand. With an average price for the route of $1,531 and an overall rating of 8.0, Fiji Airways is the most popular choice. Air New Zealand is also a great choice for the route, with an average price of $1,548 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from Philadelphia to Sydney?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Philadelphia to Sydney.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Philadelphia to Sydney?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sydney from Philadelphia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Philadelphia to Sydney?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Sydney with an airline and back to Philadelphia with another airline. Booking your flights between Philadelphia and SYD can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Philadelphia to Sydney?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sydney from Philadelphia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Philadelphia to Sydney

  • Upon arrival at Sydney Airport, you can use various public transportation means to reach your destination. Options include the Airport Link train, which provides a direct connection to the city center and surrounding suburbs. Additionally, buses operated by Sydney Buses and private shuttle services are available.
  • U.S. citizens traveling from Philadelphia to Sydney require a valid passport with at least six months of validity beyond the intended stay. Additionally, they must obtain an Electronic Travel Authority (ETA) or a Visitor Visa (subclass 600) prior to departure. The ETA allows for stays up to 90 days, while the Visitor Visa permits longer stays.
  • You can change your seat on Delta for flights from Philadelphia to Sydney. Delta provides various seat selection options, including the ability to choose your seat during the booking process or later through its website or mobile app. Additionally, Delta offers upgrade options such as Delta Comfort+ and Delta One for enhanced comfort and amenities during your journey. Contact Delta directly or manage your booking online to explore seat change and upgrade possibilities.
  • Delta Airlines offers a range of kid-friendly options on flights from Philadelphia to Sydney. These include in-flight entertainment with a variety of movies, TV shows, and games suitable for children, as well as kid-friendly meals and special amenities to make the journey more enjoyable for young travelers.
  • Delta Airlines has specific pet restrictions for flights from Philadelphia to Sydney. Only small dogs, cats, and household birds are allowed as cabin pets. The maximum weight for cabin pets is 20 lb. Larger dogs and other animals must be transported as cargo.

Reviews of the top 5 airlines serving from Philadelphia to Sydney

 
See real verified KAYAK customer reviews for airlines flying from Philadelphia to Sydney. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Philadelphia to Sydney? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Fiji AirwaysOverall score based on 208 reviews
8.0Comfort
8.1Boarding
7.5Food
7.5Entertainment
8.5Crew
Airline reviews

The airline is ok, but it needs to improve it schedules.

6.0 GoodHon, Oct 2025NAN - SFO
Read more Fiji Airways reviews

The airline is ok, but it needs to improve it schedules.

Again, Fijian hospitality was genuine, very comfortable, only improvement would be the entertainment. Why Do they only have 5 episodes of TV shows and from like season three...

Fiji Airways was amazing, will definately be lfying them again. The "Fijian hospitality" is not a catch phrase, it is genuine. the only things that could be improved is the entertainment. Not a great choice of movies, and the TV shows only have about 5 or so episodes, and often of a random season.

They will look to squeeze every penny they can out of you!! Pick your seat$$...bring luggage$$$$... if they could charge you for the air on the plane they would!!

.very good and as I needed wheelchair assistance all staff excellent.. only suggestion is get rid of those plastic chairs hard to ride in and staff have trouble compared to others. Everything else very good experience. Will use Fiji Air again.

In-flight entertainment options could use a refresh, Consider a tie-up with Spotify for more current music and with IMDB or other service for newer selections/movie ratings.

See previous comments. Didn’t take this flight because my other flight was so delayed. Ending up on two other flights as a result and was more than a day late.

6 hour delay and they didnt try to make up any time during an over 10 hour flight

Very good; seat made ready for bed after meal, a plus since one airline covered the seat at the start.

Entertainment was not good. Seems like liquor should’ve been advertised only beer and wine was even though I saw others getting liquor didn’t realize I could. And the food to me could’ve been a little bit.

After already paying for excess luggage prior to flight, i was advised AT check in that i had to pay $816 or forfeit my flight! The lady at the counter was SO rude and had already started offboarding me when i said i would pay it after asking her three times for the exact amount! Have lodged a formal complaint yet heard nothing. Will not ever travel via Qantas again

A few more inches of legroom is all i ask

One of the best Qantas business flights I've had. Quality product

Business class points redemption - good value for points paid, dubious value if out of your own pocket, domestic class business product okay for this length of flight. The flight left and arrived on time, crew were good, aircraft was a bit old and tired, but still miles ahead of their competitors in Virgin and Jetstar.

Airline running better than post Covid, proper boarding process now implemented, some aircraft feeling a bit old and tired, crew fine, online experience better.

Five hour flight instead of four hours due to westerly headwinds which wasn’t the fault of Qantas !

The wifi was out. Otherwise it was great flight. Richard, as CSM, was excellent.

Was bumped to a later flight because of inefficiency on part of the airline.

The Emerits/Qantas flight was cancelled to Wellington. We need a refund. Had to buy another airline ticket. How do we get the refund. Still not in Wellington.

Delayed QF59 flight once again, Qantas doesn't fail in maintaining there delayed departures and arrivals. USB points do not work nor do the power point sockets on the plane, Qantas staff admitted that on the flight. Don't expect to your charge devices. Saving grace, was the ice cream. Bottom line, if you expect to fly to HND and make it on time avoid Qantas and if you're interested in ice cream - visit 7/11.

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

The person I bought the ticket for didn’t make the flight.

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Another delayed flight. When the delays exceed the duration of the flight, it’s a problem.

Excellent flight. Smooth, efficient boarding. Quick flight. Arrived early at STL.

After boarding the plane in Chicago, the passengers were told that there was a technical problem with the plane. Passengers remained on the plane as they tried to fix the problem. After what was probably an hour passengers were told that there was a need to change planes as the problem was not solved. Passengers disembarked and boarded another plane. After taxing to the runway and waiting for takeoff, passengers were told that owing to the thunderstorm the flight was unable to take off but would try and reroute. After some time passengers were told there wasn't enough fuel for the new route and the plane had to return to the gate for additional fuel. after another log delay the flight got underway. On the plane there was food, drinks, ice or entertainment. We were a glass of water, which appeared rationed. Flight arrived about 5 hours late. The pilot was fantastic and communicated with the passengers throughout the ordeal.

Same as last comment. Food sucks. Quality. Not surprising most people have no clue about nourishment Clearly

Not the fault of United—weather, reroute around weather, time sitting on tarmac, arrived couple hours late, too late for train into city necessitating a much pricier cab but weather…can’t be helped.

Friendly and professional flight crew. Aside from departure delay after boarding, easy flight and smooth landing.

Great smooth flight. Had a seating change, but that was an improvement. Thanks United Airways Crew.

Delays to take off and to leave the plane after landing added a lot of time to this flight.

The Phildalphia to Allentown portion was a BUS, not a plane. All was as expected.

Excellent - explanations were clear staff was nice and flight was comfortable

Airport in MXP is crazy. Get there at least 2 hours before flight.

Flight was delayed not sure why no explanation given and no apologies either. Otherwise the flight was fine

Did not get the seat I selected and paid for.

The flight was canceled 3 hours after original take off time

Plane was delayed for 6 hours, at first by weather, which is understandable, but was further delayed with NO given reason for 2 1/2 hours more. We had no clue when we were going to depart actually until they opened the ramp. VERY POOR to ZERO COMMUNICATION!!!

Flight was delayed and after being in the airport for like seven hours, it was canceled.

Flight delays numerous times. Everytime we would get close to boarding it would be delayed again. Strung along the entire time.

Allow me to book extra bag check in as free though I packed in 1 luggage but that was 7 LBS overweight so make another bag to free check in.

I would like to get my money back. I flight was 4 hours late on the way to detroit, And same on my way back to Brussels they cancelled my flight and give me an other ticket and i had to wait 5 hours.

All attendents were very efficient, pleasant and happy. Everything went smoothly. The seats could have been wider. There could have been more free food instead of just one small bar.

My seat was one of those that couldn't recline, but the problem was that it was abnormally upright, so the headrest actually made the seat concave, which was uncomfortable and hard on my lower back. I had to ball my jacket up and use it as lumbar support. goodness I had it with me.

Boarding was so so after zone 3 was called all other zones went in

I liked a lot , the flight attendant so nice ,the seat very comfortable I enjoyed the flight , I will do it again with Air Canada,

Plane left an hour late, I missed my connection and my bow case was never even loaded on the plane in VA. I deal with this type of nonsense everytime I fly air canada.

For goodness sake, board from the back of the plane to the front and assign overhead space. It would fix everything. Seriously.

Elderly female flight attendant was not customer friendly. There were only about 12 people on a regional jet that had about 60 seats. There were 8 exit row seats and none of them were taken. We attempted to sit in those seats and the flight attendant gave the standard " you didn't pay for those" so she would not allow us to move. What harm would that have caused ? They assigned seats to 5 of the 12 people in 2 rows, row 20 and 21. A simple friendly customer experience gesture of allowing us to sit in exit rows would have gone a long way in me having a very favorable impression on Air Canada. After that I have very poor impression of Air Canada and will not fly with them when I can avoid it.

It was a smooth flight both in the sky and landing!

Everything you need to know for your flight from Philadelphia to Sydney

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