BOI - SYD

$817 Find Cheap Flights from Boise to Sydney – Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest return flight
$1,987
Typical prices: $1,784-$2,168
Air Canada
Sun 30/9Fri 5/10
BOI - SYD • 2 stops
Cheapest one-way flight
$817
Typical prices: $832-$1,083
Multiple Airlines
Sat 3/11
BOI - SYD • 2 stops
Direct flights
Not available
There are currently no direct flights between Boise and Sydney. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
March
Cheapest • 24% price drop
November
Most popular
Good to know
+1
Good to know
+1
Top stopover airports
Dallas/Fort Worth (DFW)
Cheapest • Avg $1,779 (return)
San Francisco (SFO)
Shortest trip • 19h 52m (one-way)
Insights
Insights
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Flight Deals

Cheap Flights from Boise to Sydney (BOI-SYD)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Boise to Sydney

Wed, 30 Sep - Mon, 5 Oct
Air Canada Logo
14:14 - 07:20BOI  Boise Air Term. Gowen Fld-SYD Sydney Kingsford Smith
25h 06m2 stops San Francisco Vancouver Intl
Air Canada Logo
10:20 - 09:34SYD  Sydney Kingsford Smith-BOI Boise Air Term. Gowen Fld
40h 14m2 stops Vancouver Intl Denver Intl
$1,987Air Canada
Sun, 3 Jan - Mon, 25 Jan
Multiple Airlines Logo
19:20 - 17:45BOI  Boise Air Term. Gowen Fld-SYD Sydney Kingsford Smith
28h 25m2 stops Los Angeles Los Angeles Papeete Faaa
Multiple Airlines Logo
11:20 - 11:07SYD  Sydney Kingsford Smith-BOI Boise Air Term. Gowen Fld
41h 47m2 stops Vancouver Intl San Francisco
$1,996Multiple Airlines
Wed, 30 Sep - Mon, 5 Oct
Multiple Airlines Logo
16:27 - 07:20BOI  Boise Air Term. Gowen Fld-SYD Sydney Kingsford Smith
22h 53m2 stops Portland Vancouver Intl
Multiple Airlines Logo
10:20 - 15:31SYD  Sydney Kingsford Smith-BOI Boise Air Term. Gowen Fld
22h 11m2 stops Vancouver Intl San Francisco
$2,047Multiple Airlines
Wed, 30 Sep - Mon, 5 Oct
Qantas Airways Logo
08:05 - 07:05BOI  Boise Air Term. Gowen Fld-SYD Sydney Kingsford Smith
31h 00m2 stops Phoenix Sky Harbor Intl Los Angeles Los Angeles
Qantas Airways Logo
06:00 - 22:57SYD  Sydney Kingsford Smith-BOI Boise Air Term. Gowen Fld
33h 57m2 stops Brisbane Los Angeles Los Angeles
$2,064Qantas Airways
Sun, 8 Nov - Thu, 12 Nov
United Airlines Logo
12:00 - 09:20BOI  Boise Air Term. Gowen Fld-SYD Sydney Kingsford Smith
27h 20m1 stop San Francisco
United Airlines Logo
11:50 - 11:19SYD  Sydney Kingsford Smith-BOI Boise Air Term. Gowen Fld
17h 29m1 stop San Francisco
$2,104United Airlines
Sun, 8 Nov - Thu, 12 Nov
United Airlines Logo
12:00 - 09:20BOI  Boise Air Term. Gowen Fld-SYD Sydney Kingsford Smith
27h 20m1 stop San Francisco
United Airlines Logo
11:50 - 11:19SYD  Sydney Kingsford Smith-BOI Boise Air Term. Gowen Fld
17h 29m1 stop San Francisco
$2,106United Airlines
Sun, 8 Nov - Thu, 12 Nov
United Airlines Logo
19:10 - 09:20BOI  Boise Air Term. Gowen Fld-SYD Sydney Kingsford Smith
20h 10m1 stop San Francisco
United Airlines Logo
11:20 - 22:59SYD  Sydney Kingsford Smith-BOI Boise Air Term. Gowen Fld
29h 39m2 stops Los Angeles Los Angeles Denver Intl
$2,111United Airlines
Sun, 8 Nov - Thu, 12 Nov
United Airlines Logo
14:51 - 09:20BOI  Boise Air Term. Gowen Fld-SYD Sydney Kingsford Smith
24h 29m2 stops Denver Intl San Francisco
United Airlines Logo
11:50 - 18:03SYD  Sydney Kingsford Smith-BOI Boise Air Term. Gowen Fld
24h 13m2 stops San Francisco Denver Intl
$2,113United Airlines
Wed, 30 Sep - Mon, 5 Oct
Multiple Airlines Logo
08:05 - 07:05BOI  Boise Air Term. Gowen Fld-SYD Sydney Kingsford Smith
31h 00m2 stops Phoenix Sky Harbor Intl Los Angeles Los Angeles
Multiple Airlines Logo
18:50 - 22:57SYD  Sydney Kingsford Smith-BOI Boise Air Term. Gowen Fld
21h 07m1 stop Los Angeles Los Angeles
$2,130Multiple Airlines
Wed, 30 Sep - Mon, 5 Oct
United Airlines Logo
18:50 - 06:55BOI  Boise Air Term. Gowen Fld-SYD Sydney Kingsford Smith
20h 05m1 stop San Francisco
United Airlines Logo
11:20 - 14:03SYD  Sydney Kingsford Smith-BOI Boise Air Term. Gowen Fld
19h 43m1 stop San Francisco
$2,147United Airlines
Booking Insights

Price, demand, and travel trends for Boise to Sydney flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights from Boise to Sydney with more confidence.

How much is a return flight from Boise to Sydney?

Return flights from Boise to Sydney start at $1,987. Prices are typical for this route right now, with typical return fares ranging from $1,784 to $2,168. The lowest price found in the past 5 days was $1,987 on Air Canada.

What's the cheapest day of the week to fly from Boise to Sydney?

Monday is the cheapest day of the week to fly from Boise to Sydney and is 13% cheaper than the average day. Friday is the most expensive day with flight prices 49% higher than average. Based on deals found by KAYAK users in the last 12 months.

What is the cheapest month to fly from Boise to Sydney?

•March is the cheapest month to fly from Boise to Sydney at $1,511 return.
•January ($2,589) and November ($2,269) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 71% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

Find deals

Key details for Boise to Sydney flights

Low season

February

Cheapest flight

$817
Best time to beat the crowds (10% less expensive on average)
Most popular time to fly (15% more expensive on average)
Flights from Boise to Sydney

When to book flights from Boise to Sydney

Are your dates flexible? Find out the best times to travel from Boise to Sydney based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price

Your Boise to Sydney flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

  • Which airports can I use when flying from Boise to Sydney?

    Flights from Boise to Sydney usually depart from Boise Air Term. Gowen Fld (BOI) and arrive at Sydney Kingsford Smith (SYD).

  • Which airports do connecting flights from Boise to Sydney pass through?

    One-stop flights from Boise to Sydney most commonly connect through:

    • San Francisco (SFO) – 61% of one-stop connections
    • Los Angeles Los Angeles (LAX) – 31% of one-stop connections
    • Dallas/Fort Worth (DFW) – 8% of one-stop connections

    San Francisco (SFO) handles the largest share of one-stop connections on this route.

  • Can I save money by using flexible dates for flights from Boise to Sydney?

    Yes. Being flexible with your travel dates can save you up to 42% on the Boise to Sydney route. Monday is the cheapest departure day at $1,724 return on average, while Friday is the most expensive at $2,964, a difference of $1,240. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What popular places can I visit in Sydney?

    Some of the most popular sights in Sydney are Sydney Opera House, Star Casino, and Capitol Theatre. These are among the most viewed places in Sydney on KAYAK.

  • How long is a flight from Boise to Sydney?

    A direct flight from Boise to Sydney takes 0h 00m, covering 20,446 km.

  • Do I need a passport to fly from Boise to Sydney?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How are flight prices from Boise to Sydney looking right now?

    One-way fares from Boise to Sydney are currently lower than usual. Average one-way flight prices are about $895, which is 9% below the typical average for this route.

  • How much time can I save by choosing a different stopover airport from Boise to Sydney?

    Flying via San Francisco (SFO) gives the shortest average 1-stop total travel time of 19h 52m, compared to 20h 34m via Los Angeles Los Angeles (LAX) and 24h 43m via Dallas/Fort Worth (DFW).

  • What is the time difference between Boise and Sydney?

    Sydney is 16 hours ahead of Boise (Eastern Australia Time vs Mountain Time). Plan for the time shift when scheduling connections or first-day activities.

  • Which car hire options are available at Sydney Kingsford Smith Airport (SYD)?

    Sydney Kingsford Smith Airport (SYD) hosts 5 major car hire companies, with daily rates starting from around $14 for economy cars. Top options include:
    • Bargain Car Rentals
    • East Coast Car Rentals
    • EverythingFleet
    • YESDRIVE CAR RENTAL
    • No Birds

  • How much should I expect to pay for a Boise to Sydney flight?

    Return flights from Boise to Sydney range from $1,784 to $2,168, with an average of $1,976 over the past 12 months. Anything below $1,784 counts as a good deal.

Your guide to booking Boise to Sydney flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Monday departure instead of Friday. On this route, Monday flights average $1,724 – about $1,240 less than Friday (42% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Boise to Sydney trip for March. Fares historically average $1,511 return in that month – typically $1,078 less than the most expensive month, which is January (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Sydney Kingsford Smith Airport.
    - Travelodge Hotel Sydney Airport
    - Rydges Sydney Airport Hotel
    - ibis budget Sydney Airport

More options for your flight from Boise to Sydney

Complete your trip to Sydney with a hotel stay or car hire

Car hire in Sydney
Hotels in Sydney
Holidays in Sydney