BOI - SYD

$1,609 Find Cheap Flights from Boise to Sydney – Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest return flight
$1,609
Typical prices: $1,818-$2,151
Alaska Airlines
Wed 24/1Wed 31/1
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 • 21% price drop
November
Most popular
Good to know
+1
Good to know
+1
Top stopover airports
Dallas/Fort Worth (DFW)
Cheapest • Avg $1,816 (return)
San Francisco (SFO)
Shortest trip • 20h 06m (one-way)
Insights
Insights
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We hope you enjoy your trip to Sydney!
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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

Sun, 24 Jan - Sun, 31 Jan
Alaska Airlines Logo
20:23 - 06:25BOI  Boise Air Term. Gowen Fld-SYD Sydney Kingsford Smith
64h 02m2 stops Portland Los Angeles
Alaska Airlines Logo
11:15 - 18:04SYD  Sydney Kingsford Smith-BOI Boise Air Term. Gowen Fld
24h 49m2 stops Los Angeles Seattle/Tacoma Intl
$1,609Alaska Airlines
Sun, 24 Jan - Sun, 31 Jan
Alaska Airlines Logo
20:23 - 06:25BOI  Boise Air Term. Gowen Fld-SYD Sydney Kingsford Smith
64h 02m2 stops Portland Los Angeles
Alaska Airlines Logo
11:15 - 22:54SYD  Sydney Kingsford Smith-BOI Boise Air Term. Gowen Fld
29h 39m1 stop Los Angeles
$1,621Alaska Airlines
Mon, 1 Feb - Mon, 15 Feb
Alaska Airlines Logo
20:28 - 06:25BOI  Boise Air Term. Gowen Fld-SYD Sydney Kingsford Smith
39h 57m2 stops Seattle/Tacoma Intl Los Angeles
Alaska Airlines Logo
11:15 - 13:44SYD  Sydney Kingsford Smith-BOI Boise Air Term. Gowen Fld
20h 29m1 stop Los Angeles
$1,747Alaska Airlines
Mon, 1 Feb - Mon, 15 Feb
Air New Zealand Logo
16:10 - 08:35BOI  Boise Air Term. Gowen Fld-SYD Sydney Kingsford Smith
22h 25m2 stops San Francisco Auckland Intl
Air New Zealand Logo
19:25 - 20:54SYD  Sydney Kingsford Smith-BOI Boise Air Term. Gowen Fld
43h 29m2 stops Auckland Intl San Francisco
$1,868Air New Zealand
Mon, 1 Feb - Mon, 15 Feb
Multiple Airlines Logo
18:29 - 09:00BOI  Boise Air Term. Gowen Fld-SYD Sydney Kingsford Smith
20h 31m1 stop Los Angeles
Multiple Airlines Logo
11:15 - 18:19SYD  Sydney Kingsford Smith-BOI Boise Air Term. Gowen Fld
25h 04m1 stop Los Angeles
$2,106Multiple Airlines
Sun, 24 Jan - Sun, 31 Jan
Multiple Airlines Logo
18:29 - 09:00BOI  Boise Air Term. Gowen Fld-SYD Sydney Kingsford Smith
20h 31m1 stop Los Angeles
Multiple Airlines Logo
11:15 - 14:29SYD  Sydney Kingsford Smith-BOI Boise Air Term. Gowen Fld
21h 14m1 stop Los Angeles
$2,198Multiple Airlines
Thu, 4 Feb - Mon, 8 Feb
United Airlines Logo
07:04 - 06:20BOI  Boise Air Term. Gowen Fld-SYD Sydney Kingsford Smith
29h 16m1 stop San Francisco
United Airlines Logo
11:50 - 11:16SYD  Sydney Kingsford Smith-BOI Boise Air Term. Gowen Fld
17h 26m1 stop San Francisco
$2,204United Airlines
Thu, 4 Feb - Mon, 8 Feb
United Airlines Logo
08:15 - 06:20BOI  Boise Air Term. Gowen Fld-SYD Sydney Kingsford Smith
28h 05m2 stops Chicago O'Hare Intl San Francisco
United Airlines Logo
11:50 - 14:51SYD  Sydney Kingsford Smith-BOI Boise Air Term. Gowen Fld
21h 01m1 stop San Francisco
$2,211United Airlines
Sun, 24 Jan - Sun, 31 Jan
Multiple Airlines Logo
20:23 - 06:25BOI  Boise Air Term. Gowen Fld-SYD Sydney Kingsford Smith
64h 02m2 stops Portland Los Angeles
Multiple Airlines Logo
08:55 - 22:50SYD  Sydney Kingsford Smith-BOI Boise Air Term. Gowen Fld
31h 55m3 stops Auckland Intl Papeete Faaa Los Angeles
$2,244Multiple Airlines
Sat, 14 Nov - Thu, 10 Dec
Delta Logo
16:10 - 08:30BOI  Boise Air Term. Gowen Fld-SYD Sydney Kingsford Smith
22h 20m1 stop Los Angeles
Delta Logo
10:40 - 15:04SYD  Sydney Kingsford Smith-BOI Boise Air Term. Gowen Fld
22h 24m1 stop Los Angeles
$2,317Delta
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 with more confidence.

How much is a return flight from Boise to Sydney?

Return flights from Boise to Sydney typically range from $1,818 to $2,151. The lowest price found in the past 5 days was $1,609 on Alaska Airlines.

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

Based on deals KAYAK users found in the last 12 months, Tuesday is the cheapest day of the week to fly from Boise to Sydney. It's 4% cheaper than the average day, while Friday is the most expensive, with prices 12% higher.

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

•March is the cheapest month to fly from Boise to Sydney at $1,542 return.
•November ($2,315) and December ($2,303) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 50% 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

August

Cheapest flight

$1,609
Beat the crowds with an average 56% drop in travellers.
The most popular month to fly with an average 78% increase in travellers.
Return flight 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 answers about this route, including flight times, airports, airlines, and booking tips.

  • How long is a flight from Boise to Sydney?

    A direct flight from Boise to Sydney takes 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 much should I expect to pay for a Boise to Sydney flight?

    Return flights from Boise to Sydney range from $1,818 to $2,151, with an average of $1,946 over the past 12 months. Anything below $1,818 counts as a good deal.

  • 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 averaging $57 for economy cars. Top options include:

    • East Coast Car Rentals
    • YESDRIVE CAR RENTAL
    • Bargain Car Rentals
    • No Birds
    • EverythingFleet

  • 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) – 49% of one-stop connections
    • Los Angeles (LAX) – 42% of one-stop connections
    • Dallas/Fort Worth (DFW) – 9% of one-stop connections

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

    Yes. Flexible dates can save you up to 14% on flights from Boise to Sydney. Tuesday is the cheapest departure day at $1,887 return on average, while Friday is the most expensive at $2,188, a difference of $301.

    KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.

  • 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 20h 06m, compared to 20h 20m via Los Angeles (LAX) and 24h 43m via Dallas/Fort Worth (DFW).

  • What is the time difference between Boise and Sydney?

    Sydney is 18 hours ahead of Boise (Eastern Australia Time vs Mountain Time). Plan for the time shift when scheduling connections or first-day activities.

  • 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.

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 Tuesday departure and avoid flying on Friday. On this route, Tuesday flights average $1,887, about $301 less than Friday fares (14% 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 $1,542 return in that month – typically $774 less than the most expensive month, which is November (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.

    • ibis budget Sydney Airport
    • Travelodge Hotel Sydney Airport
    • Rydges Sydney Airport Hotel

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