$1,153 Find Cheap Flights from Boise to Australia - Compare and Save

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boise to Australia departing on 8/18. 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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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

Tue, Aug 18 - Tue, Aug 25
Multiple Airlines Logo
6:51 pm - 7:05 am
BOI
-
SYD
20h 14m
1 stop
Multiple Airlines Logo
9:25 pm - 10:27 pm
SYD
-
BOI
17h 02m
1 stop
$1,153Multiple Airlines
Sun, Aug 16 - Sun, Aug 23
Multiple Airlines Logo
8:03 am - 7:30 am
BOI
-
SYD
31h 27m
1 stop
Multiple Airlines Logo
5:50 pm - 12:33 pm
SYD
-
BOI
34h 43m
1 stop
$1,162Multiple Airlines
Mon, Aug 31 - Mon, Sep 7
United Airlines Logo
2:44 pm - 7:00 am
BOI
-
SYD
24h 16m
2 stops
United Airlines Logo
10:20 am - 11:06 am
SYD
-
BOI
16h 46m
1 stop
$1,187United Airlines
Sun, Aug 16 - Sun, Aug 23
American Airlines Logo
5:19 pm - 7:30 am
BOI
-
SYD
22h 11m
2 stops
American Airlines Logo
9:10 am - 4:49 pm
SYD
-
BOI
23h 39m
2 stops
$1,188American Airlines
Mon, Aug 31 - Mon, Sep 7
United Airlines Logo
2:44 pm - 7:00 am
BOI
-
SYD
24h 16m
2 stops
United Airlines Logo
10:20 am - 9:37 pm
SYD
-
BOI
27h 17m
2 stops
$1,192United Airlines
Mon, Oct 12 - Mon, Oct 26
Multiple Airlines Logo
6:57 pm - 8:05 am
BOI
-
SYD
20h 08m
1 stop
Multiple Airlines Logo
11:15 am - 12:28 pm
SYD
-
BOI
18h 13m
1 stop
$1,281Multiple Airlines
Fri, Jul 24 - Fri, Aug 7
United Airlines Logo
5:46 pm - 7:00 am
BOI
-
SYD
45h 14m
2 stops
United Airlines Logo
10:20 am - 1:08 pm
SYD
-
BOI
18h 48m
1 stop
$1,307United Airlines
Mon, Oct 12 - Mon, Oct 26
American Airlines Logo
5:29 pm - 8:05 am
BOI
-
SYD
21h 36m
2 stops
American Airlines Logo
1:05 pm - 10:29 pm
SYD
-
BOI
26h 24m
1 stop
$1,308American Airlines
Wed, Sep 30 - Mon, Oct 5
Air Canada Logo
6:25 am - 7:20 am
BOI
-
SYD
32h 55m
2 stops
Air Canada Logo
10:20 am - 9:34 am
SYD
-
BOI
40h 14m
2 stops
$1,313Air Canada
Wed, Sep 30 - Mon, Oct 5
Air Canada Logo
6:25 am - 7:20 am
BOI
-
SYD
32h 55m
2 stops
Air Canada Logo
10:20 am - 9:34 am
SYD
-
BOI
40h 14m
2 stops
$1,314Air Canada
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 January, when tickets cost $1,068 (return) on average. On the other hand, the most expensive months are July and December, when the average cost of round-trip tickets is $3,016 and $1,526 respectively.

Good to know

Low season

August

Cheapest flight

$1,153
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly with an average 16% 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.

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 10013 reviews
8.1Crew
7.7Boarding
7.3Comfort
7.1Entertainment
6.6Food
Airline reviews

The seats were very uncomfortable. I paid for the front economy. i swear they added a row of seats in there. It was so tight, that I could measure the distance between my seat and the one in front from my elbow to the tips of my fingers plus six inches. The seat cushion was completely worn out. The dinner was very good. Thank you for having a vegetarian option as a standard. But breakfast was nothing but sugar. that's not food. The crew was crabby and rude, especially in regards to coming to the back gallery. And the entertainment choice: why would you put violent movies on the choice? the Godfather? Some movies with black women being beaten over the head with clubs? What the heck? You know that when there is a movie on a plane, everyone gets to watch it. Why choose the most violent titles possible? The total number of movies were very limited, and the television, even more so. No games were available on the set. The wellness section was nice, thank you. I appreciated a galley in the middle where I could stand. The seats were unbearable.

4.0 OkayKirstin, Jul 2026
LAX - SYD
Read more United Airlines reviews

The seats were very uncomfortable. I paid for the front economy. i swear they added a row of seats in there. It was so tight, that I could measure the distance between my seat and the one in front from my elbow to the tips of my fingers plus six inches. The seat cushion was completely worn out. The dinner was very good. Thank you for having a vegetarian option as a standard. But breakfast was nothing but sugar. that's not food. The crew was crabby and rude, especially in regards to coming to the back gallery. And the entertainment choice: why would you put violent movies on the choice? the Godfather? Some movies with black women being beaten over the head with clubs? What the heck? You know that when there is a movie on a plane, everyone gets to watch it. Why choose the most violent titles possible? The total number of movies were very limited, and the television, even more so. No games were available on the set. The wellness section was nice, thank you. I appreciated a galley in the middle where I could stand. The seats were unbearable.

Read the fine print. This was my flight home. I booked my flight for the quickest way home. Had a carry-on and a personal item. Same as my outbound flight. Apparently I needed to pre-pay extra for my carry-on. When I checked in, I was told that I had to check it. I said I’ll pay for it, and was told that this wasn’t an option anymore. They said I still had to pay $50 to check my carry-on. I told them I’ll pay whatever to just carry it in as intended. I was not allowed, so eventually I paid $50 to check my carry-on under a plane that was half full, with overhead compartments that were even less full. My white carry-on suitcase was practically destroyed getting from Idaho falls to Denver to Orange County. The low price air fair was a bait and switch. Got me to the gate, made me pay extra, then didn’t even allow me to pay for a carry on. Not to mention that I paid the $8 for WiFi that didn’t work. All to get my suitcase destroyed. I don’t think I’m going to even keep my Untied mileage plus membership and card. Apparently, membership does not have its privileges for this one.

Easy of boarding, helpfully staff at check in, surprisingly comfortable seating

My flight time was changed without any notification to me which ruined my time sensitive plans so I ended up completely changing my travel plans and no reimbursement.

Delayed - weather wasn't bad at either end. Also sat on tarmac in ORD.

During landing. 2 crew members passed 3 times by my lane and didn't notice that people in front of us had their site to the furthermore reclined... That was uncomfortable and could have been dangerous.

Terrible. Our first time back on United for 10 years, the seats in Polaris class are small and uncomfortable. They have squished too many people in to get more $$$. The staff are not friendly and not wanting to accommodate. I asked for two salads rather than a main meal and was advised no we wont do that. Then asked what I would like for breakfast and given something else anyway. I will not be flying United International anytime soon.

Food should be changed in menu Many muslims travels in this airlime they need to add one Halal meal

Smooth flight. As always dinner could have been more generous. Breakfast was great.

United Airlines was fantastic, however, UnderPricer was a nightmare. I got to the airport 4 hours before my flight. We are moving to New Zealand so had quite a bit of baggage (16 checked items) and so wanted to have plenty of time to get everything taken care of properly. When I went to check in they (United) could only find a ticket for me. The 5 tickets for my children were never officially ticketed. I called Underpricer and they told me it was United's fault and United told me that Underpricer just needs to reissue the tickets, but they refused to. I asked the Underpricer agent to transfer me to his supervisor as I was not getting the help I needed. He told me the supervisor was busy but that he would call me back in 30 minutes. 30 minutes came and went with no phone call. After an hour I called Underpricer back but they would not let me talk to the person I had talked to before, just told me that he was talking with the supervisor and technical support. I called again an hour later, was told the same thing. I tried again later, with only about 30 minutes until my flight was scheduled to leave (meaning I had been at the airport for more than 3 hours with my 5 children trying to get ticketed and board the flight). Also, my husband had moved to New Zealand 3 months prior, I haven't seen him in 3 months, my children hadn't seen their dad in 3 months, we were all extremely eager to get on that flight and get to New Zealand. The situation with the tickets did not get resolved until after it was too late to check our luggage and board our flight. We were devastated. My 11 year old son was in tears at not being able to be on his way to see his dad. Thankfully we were rebooked for the next evening, but that night it felt devastating. We'd been at the airport for 4 hours waiting. My in-laws waited with me and then helped me reload all our baggage and took us home to stay with them for the night. On the newly booked flights we could not sit together - my children were spread throughout the plane. So, even though I had paid extra to select our seats after buying my seats from Underpricer only two of us were able to sit together (thankful that my 11 year old wasn't all by himself, but not happy that my 14 & 16 year old daughters were seated by strangers). I really feel that Underpricer should refund me what I paid for the seating ($120 USD). It was a very frustrating situation and I plan on never using Kayak or Underpricer ever again.

Mostly great. Only issue was with the WiFi. Halfway through the flight it was spotty and I was unable to work as I planned. This impacted my work products as I am traveling for business and it was an unexpected hindrance which was inconvenient. Flight here was amazing. For a 5 hour flight something more than a Biscoff would be nice but I’m just swinging at windmills I guess…

I was traveling alone abroad for the first time and the staff was not helpful and rude at times.

Baggage allowances are terrible and the experience of only being allowed one bag and paying so much to take sporting equipment to a known ski area should be addressed.

Bad food, small seats that didn’t recline. I thought I was buying a quantas ticket so I feel like I got scammed

Worst seats I’ve ever had !!! The seats were very narrow and uncomfortable and misaligned with the seats in front of mine leading to bottom of the seat in front of mine pressing on my legs for 15.5 hours !

Flight was delayed due to a steering issue with plane. The delay caused me to miss the connecting flight. The delay caused me to spend an extra 21 hours in airports and flights to get to my destination. The plane issue obviously should have been found and fixed before we even boarded. Ridiculous.

DO NOT BOOK THROUGH AMERICAN AIRLINES IF YOU HAVE ANY ADDITIONAL NEEDS. Great flight, crew etc. it wasn’t full so had space to stretch out Only downside was there was no GF option for my partner. We booked through American and it was a Qantas flight so despite contacting both airlines to confirm, she didn’t have a gluten free meal for the 16 hour flight (nor the flight in the other direction). The flight attendants did their best to accommodate but it was not super substantial.

Crazy seating issues. We got seated far apart. Offered middle seats at a premium rate. Why is a middle seat now the expensive seat? Baffling.

The food at Admirals Club was really great Pijamas were a nice feature The flight attendant was very nice and great attitude The aa.com does not work well specially internet service Overall a very good flight .

Flight a little late. Entertainment system didn’t work for first hour. Toilets dirty after 2 hours. Is there no one assigned to clean them?

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

Information on your arrival and departure airports