Cheap flights from Philadelphia to Sydney from $716
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to Sydney departing on 15/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from Philadelphia to Sydney
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 Sydney?
The month of September is, on average, the cheapest month to fly to Sydney from Philadelphia, with most prices found around $1,745. If you aren’t able to travel to Sydney during the month of September, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $1,760.
What is the cheapest day to depart on your flight to Sydney?
Our data shows that Tuesday is the least expensive day to fly to Sydney. Tickets to fly out on this day can be as low as $2,058. The most expensive day to fly to Sydney is Wednesday, with ticket prices averaging around $3,804.
How far in advance should I book a flight to Sydney?
You are more likely to see cheaper flights to Sydney from Philadelphia when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $2,244 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Philadelphia for as low as $1,625 on momondo.
How have Philadelphia to Sydney flight prices changed over time?
As of July 2025, prices for Philadelphia to Sydney flights are approximately 17% cheaper when compared to flights at the same time last year.
When to book flights from Philadelphia to Sydney
Cheap Philadelphia to Sydney (PHL to SYD) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Philadelphia to Sydney
How far is Philadelphia to Sydney Kingsford Smith by plane?
The straight-line distance from Philadelphia to Sydney Kingsford Smith is 15874.2 km. In terms of flight time, this usually takes a little over 26h 00m.
When did momondo last update prices for flights from Philadelphia Airport to Sydney Kingsford Smith Airport?
Prices for flights from Philadelphia Airport to Sydney Kingsford Smith Airport are updated daily.
How many operators does momondo search for flights from Philadelphia Airport to Sydney Kingsford Smith Airport?
There is 1 operator available for flights from Philadelphia Airport to Sydney Kingsford Smith Airport as of July 2025.
How old do you have to be to fly from Philadelphia Airport to Sydney Kingsford Smith Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia Airport to Sydney Kingsford Smith Airport.
What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?
The necessary travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Philadelphia to Sydney?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Philadelphia to Sydney is United Airlines (100% of total bookings).
Best airlines flying from Philadelphia to Sydney
Compare and see reviews for airlines that fly from Philadelphia to Sydney with momondo
| Airline | Rating | Free cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $1,307 | Free cancellation | Rating 7.4 8,861 reviews |
Travelling to a place near Sydney?
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Why should I use momondo to find a flight deal from Philadelphia to Sydney?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Philadelphia to Sydney for you.
Can I find flights from Philadelphia to Sydney with flexible booking policies on momondo?
Yes. All flights to Sydney from Philadelphia on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Philadelphia to Sydney?
momondo provides multiple filters to help you find the best flight to Sydney from Philadelphia. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from Philadelphia to Sydney right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Sydney from Philadelphia. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.