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Cheap Flights from Philadelphia International to Sydney

Compare Philadelphia International to Sydney flight deals

Find the cheapest month or even day of the year to fly to Sydney

Book the best Sydney fare with no extra fees

Flight deals from Philadelphia International to Sydney

Looking for a cheap last-minute deal or the best return flight from Philadelphia International to Sydney? Find the lowest prices on one-way and return tickets right here.
Sydney.ج.م.‏ 28,820 per passenger.Departing Thu, 11 Sep.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Thu, 11 Sep, arriving in Sydney.Price includes taxes and charges.From ج.م.‏ 28,820, select.
Sydney.ج.م.‏ 32,303 per passenger.Departing Thu, 26 Feb.One-way flight with Hawaiian Airlines.Outbound indirect flight with Hawaiian Airlines, departs from Philadelphia International on Thu, 26 Feb, arriving in Sydney.Price includes taxes and charges.From ج.م.‏ 32,303, select.
Sydney.ج.م.‏ 33,737 per passenger.Departing Wed, 1 Apr.One-way flight with Hawaiian Airlines.Outbound indirect flight with Hawaiian Airlines, departs from Philadelphia International on Wed, 1 Apr, arriving in Sydney.Price includes taxes and charges.From ج.م.‏ 33,737, select.
Sydney.ج.م.‏ 38,288 per passenger.Departing Wed, 1 Oct.One-way flight with Spirit Airlines.Outbound indirect flight with Spirit Airlines, departs from Philadelphia International on Wed, 1 Oct, arriving in Sydney.Price includes taxes and charges.From ج.م.‏ 38,288, select.
Sydney.ج.م.‏ 42,960 per passenger.Departing Thu, 22 Jan.One-way flight with Spirit Airlines.Outbound indirect flight with Spirit Airlines, departs from Philadelphia International on Thu, 22 Jan, arriving in Sydney.Price includes taxes and charges.From ج.م.‏ 42,960, select.
Sydney.ج.م.‏ 49,611 per passenger.Departing Thu, 27 Nov.One-way flight with Air Canada.Outbound indirect flight with Air Canada, departs from Philadelphia International on Thu, 27 Nov, arriving in Sydney.Price includes taxes and charges.From ج.م.‏ 49,611, select.
Sydney.ج.م.‏ 49,779 per passenger.Departing Sat, 23 Aug.One-way flight with Spirit Airlines.Outbound indirect flight with Spirit Airlines, departs from Philadelphia International on Sat, 23 Aug, arriving in Sydney.Price includes taxes and charges.From ج.م.‏ 49,779, select.
Sydney.ج.م.‏ 55,709 per passenger.Departing Tue, 23 Dec.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Tue, 23 Dec, arriving in Sydney.Price includes taxes and charges.From ج.م.‏ 55,709, select.

Find the cheapest month to fly from Philadelphia International to Sydney

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Philadelphia International to Sydney flights are currently cheapest in September.
Aug
from ج.م.‏ 49,779
Sep
from ج.م.‏ 28,820
Oct
from ج.م.‏ 38,288
Nov
from ج.م.‏ 49,611
Dec
from ج.م.‏ 55,709
Jan
from ج.م.‏ 42,960
Feb
from ج.م.‏ 32,303
Mar
Find prices
Apr
from ج.م.‏ 33,737
May
Find prices
Jun
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Jul
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Philadelphia International to Sydney: Alternative routes

Compare routes from Philadelphia International to Sydney below. You may find an airport to fly into that's cheaper, faster, or easier than Sydney.

Philadelphia to Sydney: Flight information

The things to know before you go.
Cheapest flight foundج.م.‏ 28,820
Cheapest month to flySeptember

Finding cheap flights from Philadelphia International to Sydney: Frequently asked questions

The best price we found for a return flight from Philadelphia International to Sydney is ج.م.‏ 56,233. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Philadelphia International to Sydney. But we found flights with one or more stops from ج.م.‏ 56,233.
As of August 2025, there are no flights flying from Philadelphia International to Sydney.
The cheapest month to fly from Philadelphia International to Sydney is usually August.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Philadelphia International Airport to Sydney Airport on Saturday, 30 August 2025.
No airlines currently offer direct flights between Philadelphia International Airport and Sydney Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Sydney but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Sydney is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Frontier Airlines offers the cheapest flight tickets to Sydney.

Flying from Philadelphia International Airport (PHL) to Sydney (Kingsford Smith) Airport (SYD): what you need to know

  • The timezone in Sydney is UTC+11, which is 15 hours ahead of Philadelphia.

  • Give yourself plenty of time to catch your PHL to SYD flight. As a general rule, turn up two hours before international departures and an hour ahead for domestic flights.

  • Flying during a peak time such as August? Public holidays and other high seasons can mean longer queues and delays at security. Play it safe and get there up to four hours ahead of international flights and two hours before domestic departures.

  • We make it easy to book a flight with a stopover. To see all your options for tickets from Philadelphia International Airport to Sydney (Kingsford Smith) Airport, deselect 'Direct flights only.' Then, choose a flight with a stop long enough to tour the city of your choice. Top stopovers between PHL and SYD include:

    • Los Angeles International Airport

    • George Bush Intercontinental Airport

    • Dallas/Fort Worth International Airport

How to find the cheapest flights from Philadelphia International Airport (PHL) to Sydney (Kingsford Smith) Airport (SYD)

  • The lowest price we've seen for a one-way Philadelphia International Airport to Sydney (Kingsford Smith) Airport flight is ج.م.‏ 28,820. A round-trip plane ticket is currently ج.م.‏ 56,233. Depending on the availability and when you book, these fares can change.

  • Don't leave everything to the last moment. You're more likely to get cheap tickets from PHL to SYD if you book early. Airlines often have some excellent early bird rates.

  • If you can be flexible with your travel dates, use the 'Whole month' search function. It'll give you the lowest price in every month when looking for your flight from Philadelphia International Airport to Sydney (Kingsford Smith) Airport.

  • Never miss a deal on cheap flights from PHL to SYD by creating a Price Alert. You'll get an email or notification on the app when a new low fare is offered.

  • Discover the ideal flight for you by using the filters. To see the 'Best,' 'Cheapest' or 'Fastest' flights from Philadelphia International Airport to Sydney (Kingsford Smith) Airport, use the 'Sort by' function. You can also filter by arrival and departure times, airline, and number of stops.

Handy information about Philadelphia International Airport (PHL)

  • PHL is located at Industrial Highway and Island Road.

  • When it comes to the on-time performance of Philadelphia International Airport, 78.93% of flights stick to their scheduled arrival time.

  • To reach Philadelphia International Airport from central Philadelphia, it takes about 15 minutes if you're going by car. This depends on traffic, however. It's approximately 19 kilometres from the airport to the city centre.

  • Expect a journey time of about 45 minutes on public transport.

  • Get your journey off to a relaxed start by staying near PHL. Whether you're catching an early flight from Philadelphia International Airport to Sydney (Kingsford Smith) Airport or just don't like being rushed, these hotels are the answer:

Arriving at Sydney (Kingsford Smith) Airport (SYD)

  • Book a hotel near SYD if you have a late Philadelphia International Airport to Sydney (Kingsford Smith) Airport flight. Select one of these accommodation options and skip the long transfer after landing:

  • Fast-track your adventure by picking up a Sydney (Kingsford Smith) Airport rental car. Grab your wheels from simba car hire, Bargain Car Rentals or Yes Drive and explore beyond Sydney's usual tourist stops.

  • Lock in the best possible rate by booking your ride from Sydney (Kingsford Smith) Airport around two weeks ahead of your departure.

Getting from Sydney (Kingsford Smith) Airport (SYD) to central Sydney

  • Sydney (Kingsford Smith) Airport is approximately 18 kilometres from central Sydney. The drive time takes about 20 minutes.

  • It takes around 25 minutes if you're using public transport.

When to fly to Sydney (Kingsford Smith) Airport (SYD)

  • April is the busiest month for flights from Philadelphia International Airport to Sydney (Kingsford Smith) Airport. To avoid the crowds, go to Sydney in April.

  • Before locking in your flight from Philadelphia International Airport to Sydney (Kingsford Smith) Airport, consider the type of weather you like. January is the warmest month in Sydney, with temperatures ranging from 17ºC to 32ºC.

  • For cooler conditions, look for a cheap ticket from PHL to SYD in July. Average temperatures are between 5ºC and 19ºC then.

Explore more of Australia

  • Canberra is just one of the many cities in Australia waiting to be discovered once you've seen Sydney. Around 241 kilometres away to the south-west, its best attractions include Australian War Memorial, National Gallery of Australia and Parliament House.

  • Around 121 kilometres north-east of Sydney, Newcastle is another favourite stop in Australia. Start your sightseeing at Newcastle Beach, Nobbys Beach and Merewether Beach.

Plan the rest of your trip from Philadelphia to Sydney

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.