Cheap Flights from St. Louis (STL) to Newcastle (NTL)

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Newcastle, NSW (NTL-Williamtown)

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Williamtown Airport (NTL) cost?
Lock in a cheap one-way flight or cheap return flight from Lambert-St. Louis Intl. Airport (STL) to Williamtown Airport (NTL) 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 Lambert-St. Louis Intl. Airport (STL) to Williamtown Airport (NTL)?
is the most affordable month to fly from STL to NTL. Traveling outside of peak seasons is often the key to finding better deals on flights.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Williamtown Airport (NTL)?
Use the filters on Expedia to compare airlines and find the cheapest carrier that'll fly you from STL to NTL. Then, sort your results by "Price (lowest to highest)" to score a great deal.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Williamtown Airport (NTL)?
Nonstop flights from Lambert-St. Louis Intl. Airport (STL) to Williamtown Airport (NTL) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to NTL?
Typically you'll find the most flight options available on a Friday. Tuesdays are often the quietest.* However, this can change based on the season, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Williamtown Airport (NTL)?
Opt for a flight from Lambert-St. Louis Intl. Airport (STL) to Williamtown Airport (NTL) that leaves before 3 PM to reduce the likelihood of delays and cancellations. Departures after this time 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 Lambert-St. Louis Intl. Airport (STL) to Williamtown Airport (NTL) last-minute?
Holding off until just before your trip to book a ticket from STL to NTL generally means paying more. While you might find some last-minute offers, they aren't always guaranteed. Be flexible with your itinerary for the best chance of landing a bargain.
Is it cheaper to book a STL to NTL flight and hotel package?
Securing a STL to NTL flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Select from our wide range of hotels and then add flights, car rentals and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Williamtown Airport (NTL)?
It's generally possible to reschedule or cancel your STL to NTL flight. However, if it's been more than 24 hours since booking, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Williamtown
Distance
8991 mi

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St. Louis to Newcastle Flights

The cheapest times to fly from St. Louis to Newcastle

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 St. Louis to Newcastle are during the month of . You can find some of the cheapest flights from St. Louis to Newcastle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Newcastle

Sunday is one of the best days to book for cheap flights from St. Louis to Newcastle: 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 St. Louis to Newcastle

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 St. Louis to Newcastle in 2025. You can also book with separate airlines for your outbound and return journeys, from 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 St. Louis to Newcastle 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 St. Louis to Newcastle 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.

 

St. Louis to Newcastle Flights

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*Available to One Key members.