Cheap Flights from Boulder (WBU) to Sydney (SYD)

Popular airlines from Boulder, CO (WBU-Boulder Municipal) to Sydney Airport (SYD)

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Frequently asked questions

How much does a flight from Boulder, CO (WBU-Boulder Municipal) to Kingsford Smith Intl. Airport (SYD) cost?
Grab a cheap one-way flight or cheap return flight from Boulder, CO (WBU-Boulder Municipal) to Kingsford Smith Intl. Airport (SYD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Boulder, CO (WBU-Boulder Municipal) to Kingsford Smith Intl. Airport (SYD)?
The cheapest month to fly from WBU to SYD is , when demand is low. Off-peak months are usually when airlines offer better prices between these airports.
What is the cheapest airline that flies from Boulder, CO (WBU-Boulder Municipal) to Kingsford Smith Intl. Airport (SYD)?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from WBU to SYD. Then, sort your results by "Price (lowest to highest)" to score the best deal available.
How many flights per day from Boulder, CO (WBU-Boulder Municipal) to Kingsford Smith Intl. Airport (SYD)?
There aren't any daily direct flights available from Boulder, CO (WBU-Boulder Municipal) to Kingsford Smith Intl. Airport (SYD). But you can choose flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be soaring above the clouds in no time.
What day of the week has the most flights from WBU to SYD?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Just remember that flight schedules can change depending on a range of factors, including the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Boulder, CO (WBU-Boulder Municipal) to Kingsford Smith Intl. Airport (SYD)?
Book a flight from Boulder, CO (WBU-Boulder Municipal) to Kingsford Smith Intl. Airport (SYD) that leaves before 3 PM to reduce the risk of cancellations. Departures after this time are on average 22% more likely to be canceled.**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 Boulder, CO (WBU-Boulder Municipal) to Kingsford Smith Intl. Airport (SYD) last-minute?
Last-minute bookings from WBU to SYD are generally more expensive. To lock in the lowest prices, start looking for flights early. That said, if you can play around with your travel dates, it's possible to score a cheap ticket right before you leave.
Is it cheaper to book a WBU to SYD flight and hotel package?
You'll generally save money by securing a WBU to SYD flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one convenient place. After choosing your preferred accommodations and flights, you can add extras like car rentals, tours and activities.
Can I cancel or change the date of my flight from Boulder, CO (WBU-Boulder Municipal) to Kingsford Smith Intl. Airport (SYD)?
If you reserved your WBU to SYD flight within the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the fare type you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Boulder Municipal
Destination airport
Kingsford Smith Intl.
Distance
8329 mi

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Boulder to Sydney Flights

The cheapest times to fly from Boulder to Sydney

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

 

The best time to book a flight from Boulder to Sydney

Sunday is one of the best days to book for cheap flights from Boulder to Sydney: 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 Boulder to Sydney

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 Boulder to Sydney in 2026. 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 Boulder to Sydney 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 Boulder to Sydney 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.

 

Boulder to Sydney Flights

*Flight schedules are subject to change.

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