The cheapest times to fly from BOI to SYD are

  • January 29th to March 11th
  • April 2nd to May 6th (except the week of April 23rd)
  • August 6th to December 2nd (except the week of October 8th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from BOI to SYD is mid February. Prices can be as high as $2434 for Saturday flights during late December, or as low as $1065 for Tuesday flights around mid February.


When to Fly to Sydney

Flying from Boise, ID (BOI) to Sydney (SYD) will usually cost between $1097 to $1915 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid February with an average ticket price of $1131. Due to high demand the most expensive time to fly is late December, with an average price of $2165. Planning your trip to low-cost times can easily save you $1034 on economy flights and even more on first-class flights. Generally, any price below $1282 can be considered a good price for a round-trip BOI to SYD flight.

See below for a graph of average weekly prices for the BOI to SYD route. All prices are for round-trip tickets in USD.

BOI to SYD Flight Prices

Compared to other flights, the BOI to SYD flight is slightly more expensive than the average and costs more than the average flight leaving from Boise. The average price per mile (for a direct flight) is $0.1, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Saturdays are the most expensive days to fly to Sydney, and Fridays are the most expensive days to return to Boise. Selecting flights on the least expensive days could save you up to $166 (12%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $1266. Return trip prices are from the SYD to BOI flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from BOI to SYD can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 15 hour 12 minutes may not be realistic.


Flight Hacking BOI to SYD

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from BOI to SYD — but Champion Traveler does!

Hack #1: Honolulu, HI (BOI > HNL > SYD)

  • Price for both tickets: $1069
  • Average savings: $213 (16.58%)

See BOI to HNL flights

Hack #2: Los Angeles, CA (BOI > LAX > SYD)

  • Price for both tickets: $1115
  • Average savings: $167 (13.03%)

See BOI to LAX flights

Hack #3: Beijing (BOI > PEK > SYD)

  • Price for both tickets: $1262
  • Average savings: $20 (1.56%)

See BOI to PEK flights


Flight Questions Answered

Still have questions about flying from BOI to SYD? We’ve got answers.

Which airlines fly this route?

You can find 20 major airlines flying this route most often: Air Canada, Air New Zealand, Alaska, American, ANA, Asiana, British Airways, Cathay Pacific, China Airlines, Delta, Emirates, Fiji Airways, Hawaiian, JAL, Korean Air, Qantas, Singapore Airlines, United, Virgin Atlantic, Virgin Australia, and potentially more during busy seasons.

How far away is it from Sydney International Airport to Boise Air Terminal Airport?

The distance between the two airports is roughly 7898 miles or 12711 kilometers.

How long does it take to fly from BOI to SYD?

The real-world flight time for a nonstop BOI to SYD flight is about 15 hour 12 minutes.

How many flights go between Boise, ID and Sydney?

It depends on the day of the week and the date, but a typical day might have around 80 available flights from BOI to SYD.


Airport Location Info


Departing Airport

Origination code BOI
Origination airport name Boise Air Terminal Airport
City Boise, ID
Country the United States
Latitude 43.6
Longitude -116.2

Return Airport

Destination code SYD
Destination airport name Sydney International Airport
City Sydney
Country Australia
Latitude -33.9
Longitude 151.2


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.