$580 Find Cheap Flights from Boise to Australia

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boise to Australia departing on 1/31. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap Flights from Boise to Australia

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Sydney
Sydney1 stop$1,076
Adelaide
Adelaide2 stops$1,592
Sydney
Sydney1 stop$1,076
Adelaide
Adelaide2 stops$1,592

Book Cheap Boise to Australia Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boise to Australia that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Boise to Australia

Mon, Jan 26 - Mon, Feb 2
Alaska Airlines Logo
7:02 pm - 9:00 am
BOI
-
SYD
19h 58m1 stop
Alaska Airlines Logo
11:20 am - 1:35 pm
SYD
-
BOI
20h 15m1 stop
$1,076Alaska Airlines
Mon, Jan 26 - Mon, Feb 2
American Airlines Logo
12:37 pm - 9:00 am
BOI
-
SYD
26h 23m2 stops
American Airlines Logo
11:20 am - 5:07 pm
SYD
-
BOI
23h 47m2 stops
$1,149American Airlines
Mon, Jan 26 - Mon, Feb 2
American Airlines Logo
2:48 pm - 9:00 am
BOI
-
SYD
24h 12m2 stops
American Airlines Logo
2:05 pm - 7:25 pm
SYD
-
BOI
23h 20m1 stop
$1,150American Airlines
Mon, Jan 26 - Mon, Feb 2
United Airlines Logo
10:15 am - 9:05 am
BOI
-
SYD
28h 50m1 stop
United Airlines Logo
11:20 am - 7:51 pm
SYD
-
BOI
26h 31m1 stop
$1,162United Airlines
Tue, Dec 30 - Sun, Feb 15
Delta Logo
3:30 pm - 8:30 am
BOI
-
SYD
23h 00m2 stops
Delta Logo
10:40 am - 4:15 pm
SYD
-
BOI
23h 35m2 stops
$1,274Delta
Sat, Jan 10 - Sun, Jan 18
Alaska Airlines Logo
5:40 am - 7:45 pm
BOI
-
SYD
20h 05m2 stops
Alaska Airlines Logo
9:40 pm - 10:52 am
SYD
-
BOI
31h 12m2 stops
$1,319Alaska Airlines
Thu, Feb 5 - Mon, Feb 9
Alaska Airlines Logo
7:02 pm - 9:00 am
BOI
-
SYD
19h 58m1 stop
Alaska Airlines Logo
11:20 am - 1:35 pm
SYD
-
BOI
20h 15m1 stop
$1,334Alaska Airlines
Tue, Dec 30 - Sun, Feb 15
Delta Logo
11:17 am - 6:50 am
BOI
-
SYD
25h 33m2 stops
Delta Logo
10:40 am - 4:15 pm
SYD
-
BOI
23h 35m2 stops
$1,365Delta
Thu, Feb 5 - Mon, Feb 9
United Airlines Logo
10:15 am - 9:05 am
BOI
-
SYD
28h 50m1 stop
United Airlines Logo
2:00 pm - 4:10 pm
SYD
-
BOI
20h 10m1 stop
$1,401United Airlines
Thu, Feb 5 - Mon, Feb 9
United Airlines Logo
2:37 pm - 9:05 am
BOI
-
SYD
24h 28m2 stops
United Airlines Logo
12:10 pm - 11:25 am
SYD
-
BOI
17h 15m1 stop
$1,406United Airlines
Booking Insights

KAYAK's insights & trends for Boise to Australia flights

Get data-powered insights and trends into flights from Boise to Australia to help you find the cheapest flights, the best time to fly and much more.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boise to Australia, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Boise to Australia is September, when tickets cost $963 (return) on average. On the other hand, the most expensive months are December and July, when the average cost of round-trip tickets is $1,462 and $1,456 respectively.

Good to know

Low seasonJanuary
Cheapest flight$580
Best time to beat the crowds but there is an average 4% increase in price.
Most popular time to fly with an average 19% increase in price.
Flight from Boise to Sydney

FAQs - booking Australia flights

  • How does KAYAK find such low prices on flights from Boise to Australia?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Boise to Australia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Boise to Australia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Boise to Australia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Boise to Australia?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Boise to Australia with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Boise to Australia?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Boise to Australia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Australia?

    The cheapest time of day to fly to Australia is generally in the evening, when round-trip flights cost $1,311 on average. Morning departures are around 12% more expensive than evening flights, on average. The most expensive time of day to fly to Australia is generally at night, which is peak travel time and where the average cost of a ticket is $1,539.

Reviews of the top airlines flying from Boise to Australia

 
Need help choosing which airline to fly with from Boise to Australia? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9066 reviews
6.6Food
7.7Boarding
7.1Entertainment
8.1Crew
7.3Comfort
Airline reviews

Flight was delayed 8 times. We were sitting at the airport for 14 hours. We got 2 hours of sleep (if that) on what was not meant to be a red-eye.

4.0 OkayJessica, Dec 2025
EWR - LAS
Read more United Airlines reviews

Flight was delayed 8 times. We were sitting at the airport for 14 hours. We got 2 hours of sleep (if that) on what was not meant to be a red-eye.

The movies offered were great. Staff were very pleasant and very efficient.

After a delay at the gate, C3, at Ohare on Sunday, I left my Blk ski coat on the bench at the gate, lost! Please review my lob claim, thx.

Very bad! They kept delaying my flight and wouldn’t do anything about it

They brought an empty plane to the gate. Then a flight delay was announced for maintenance and waiting on a part. I was then put on a flight to San Francisco instead with a connecting flight to my final destination. Arrived at my final destination 2 hours late.

The only downside was my cell phone charger wouldn’t work in the charging port but everyone else’s would work in them all. My cell phone cable works fine in my hotel room in Frankfurt.

Flight and crew were great. United didn't inform crew of immigration process which was disappointing!

Flight team stood out for perzonal attention, kindness at bright cheery attitudes at 8am. Very helpful.

Seats had less pitch than a regional jet. Food was OK. Have to buy alcohol on US based carriers flying international. Boarding was a mess. Did not have bags but overhead space was gone quick. Would like to see the airlines enforce the one bag over and one bag under policy

Ot was overall fine. Left on time and had basic snacks. Weather was finicky but that’s not the airlines fault.

Attendants were pleasant and the flight was smooth and relaxed.

A little late at the start but all worked out well.

It was fine. No drinks nor snacks offered though. I thought that was unusual.

I liked the humor of the captain and crew on the flight from Flagstaff to Dallas. They were humorous.

AA delayed the flight for 3 hours and 50 minutes, but delayed the last 2 hours, 30 minutes at a time, so if we knew before, could have stayed at home and worked instead of being at the airport wasting time... The plane's crew was excellent, not their fault.

After arriving in Dallas, the aircraft taxied for an unusually long time and was unable to park at the gate, which caused a significant delay and made me miss my connecting flight. I then had to wait in a very long line to be rebooked, and I was told that no hotel or meal accommodations would be provided. What is even more unacceptable is that my luggage was mishandled and has still not been located. My suitcase contains important medications that I urgently need, and I have been unable to access them due to the airline’s mishandling. This situation has caused me considerable stress and inconvenience, and I need this issue to be resolved immediately.

RIC Staff was not enough. Elderly passengers had to wait 30 minutes to deplane, so we could board and still had to walk as no chairs were provided. And, passenger in front of my seat assignment rammed seat against my legs entire flight time. Was mildly bruised and left thigh still sore.

Liked that it was on time. Staff professional and friendly.

Things were delayed a little. But that didn’t affect my plans. It was fine. I was surprised it was so full thanksgiving day. The crew were friendly and professional.

I appreciated that it was on time, safe and professional. I didn’t like that I wasn’t in a place where I had a window at my window seat. It would have been nice to know that in advance. If it was mentioned in the ticketing, I didn’t notice it.

Everything you need to know for your flight from Boise to Australia

Information on your arrival and departure airports