$642 Find Cheap Flights from Australia to Colorado - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Australia to Colorado departing on 9/30. 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 Australia to Colorado

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Australia to Colorado 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 Australia to Colorado

Thu, Aug 6 - Tue, Aug 18
Multiple Airlines Logo
1:15 pm - 12:42 am
SYD
-
DEN
27h 27m
2 stops
Multiple Airlines Logo
7:25 am - 11:50 am
DEN
-
SYD
36h 25m
2 stops
$724Multiple Airlines
Thu, Aug 6 - Tue, Aug 18
Multiple Airlines Logo
1:15 pm - 12:42 am
SYD
-
DEN
27h 27m
2 stops
Multiple Airlines Logo
10:09 am - 11:50 am
DEN
-
SYD
33h 41m
3 stops
$797Multiple Airlines
Thu, Nov 5 - Sat, Nov 7
United Airlines Logo
11:50 am - 8:16 am
SYD
-
DEN
38h 26m
2 stops
United Airlines Logo
6:00 am - 9:20 am
DEN
-
SYD
33h 20m
1 stop
$870United Airlines
Thu, Nov 5 - Sat, Nov 7
United Airlines Logo
11:50 am - 8:16 am
SYD
-
DEN
38h 26m
2 stops
United Airlines Logo
6:00 am - 9:20 am
DEN
-
SYD
33h 20m
1 stop
$873United Airlines
Sun, Oct 25 - Wed, Oct 28
American Airlines Logo
10:10 am - 12:15 pm
SYD
-
ASE
67h 05m
2 stops
American Airlines Logo
7:30 am - 6:55 am
ASE
-
SYD
30h 25m
1 stop
$891American Airlines
Sun, Oct 25 - Wed, Oct 28
American Airlines Logo
10:10 am - 12:15 pm
SYD
-
ASE
67h 05m
2 stops
American Airlines Logo
7:30 am - 6:55 am
ASE
-
SYD
30h 25m
1 stop
$898American Airlines
Mon, Oct 12 - Mon, Nov 9
Air Canada Logo
6:15 am - 4:58 pm
MEL
-
DEN
27h 43m
2 stops
Air Canada Logo
11:48 am - 2:15 pm
DEN
-
MEL
32h 27m
2 stops
$1,096Air Canada
Mon, Sep 28 - Wed, Nov 11
Air New Zealand Logo
11:10 am - 10:15 pm
MEL
-
DEN
27h 05m
2 stops
Air New Zealand Logo
11:43 am - 8:55 am
DEN
-
MEL
27h 12m
2 stops
$1,123Air New Zealand
Tue, Oct 13 - Mon, Nov 9
Air Canada Logo
7:10 am - 6:18 pm
MEL
-
DEN
28h 08m
2 stops
Air Canada Logo
7:00 pm - 2:35 pm
DEN
-
MEL
25h 35m
2 stops
$1,162Air Canada
Thu, Oct 1 - Sat, Oct 31
Air New Zealand Logo
8:40 am - 9:13 pm
BNE
-
DEN
28h 33m
2 stops
Air New Zealand Logo
4:04 pm - 10:00 am
DEN
-
BNE
25h 56m
2 stops
$1,168Air New Zealand
Booking Insights

KAYAK's insights & trends for flights to Colorado

Get data-powered insights and trends for flights to Colorado to help you find the cheapest flights, the best time to fly and much more.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Australia to Colorado, 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 Australia to Colorado is November, when tickets cost $531 (return) on average. On the other hand, the most expensive months are June and April, when the average cost of round-trip tickets is $698 and $628 respectively.

How far in advance should I book a flight from Australia to Colorado?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to Colorado, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Australia to Colorado, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 8 weeks before departure.

Good to know

Low seasonApril
Cheapest flight$642
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly with an average 8% increase in price.
Flight from Sydney to Denver

FAQs for booking flights from Australia to Colorado

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

    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 Australia to Colorado.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Australia to Colorado 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 Australia to Colorado?

    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 Australia to Colorado 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 Australia to Colorado?

    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 Australia to Colorado 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 Australia to Colorado

 
See real verified KAYAK customer reviews for airlines flying to Colorado. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Australia to Colorado. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Australia to Colorado? 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 9991 reviews
6.7Food
8.1Crew
7.1Entertainment
7.7Boarding
7.3Comfort
Airline reviews

The staff was incredible, very attentive, polite, made you feel like the center of the universe. They even all wrote me a happy birthday card. Truly just an amazing crew, cannot stress it enough.

10.0 ExcellentAnonymous, Jun 2026
NRT - DEN
Read more United Airlines reviews

The staff was incredible, very attentive, polite, made you feel like the center of the universe. They even all wrote me a happy birthday card. Truly just an amazing crew, cannot stress it enough.

Checking bag at terminal was horrible. No agents to check us in and only 1 kiosk working. Boarding went ok. Crew onboard was very scattered rained. Missed our row while serving and then didn’t see them hardly again.

The entertainment is a bit limited, it would be better if they added some games to play besides the movies and tv shows. But the seats are comfortable and the crew is polite

Food was great. Staff was phenomenal. Seats were a bit hard and could use a lot more entertainment options as far as movies to choose from. WiFi was good. Overall great trip.

Boarding was smooth and efficient. The only food was some pretzels, but it was a short flight. Not much to order if you were hungry.

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.

I flew from Santa Fe to Denver to catch a flight to London and the transfer of my luggage on arrival at Denver to the London flight worked perfectly. The crew on the ground and on board for the London flight were so friendly and efficient.

It was a short flight so I was expecting too much

Late- that’s what United does best. Missed my connection, rebooked to a flight 17 hours later and had to spend $500 on a hotel. What did I get? A $15 meal voucher. What can you get in an airport for $15. I hate United so much.

It was good overall except from Omaha to Denver when flight a was a repeatedly delayed apparently due to some issue at Denver. Communications could have been handled better. I had to board then deboard with luggage and board again

Another good flight experience with Air Canada. The business section did not feature the full length sleeping arrangement, but this was a shorter trip. The food was excellent. But the flight crew was truly top tier: friendly, cheerful, helpful at all the right times. Air Canada truly outshines all U.S. carriers.

Wifi was great. Kind air crew and comfortable seating. Also liked the entertainment options.

I did not noticed baggage was separate - I had assumed international flights included luggage, so it surprised me I had to pay to check a bag.

In a nutshell, my bag, the one I have to pay for, because now you can’t even bring a carry on, did not make it. I am still waiting for an update. The fact that not only were have to pay for it, but on top of that we are stuck without getting it, it’s ridiculous..

flight landed late almost 1.00hr and we 4 passengers missed our connected flight to indianapolis, we need to get the hotel and taxi for the next day flight to home in indianapolis, cost us $ 300 more

Overall good experience. The flight from Toronto to Denver does not have entertainment - movies to watch.

Staff was friendly helpful also good timing I rate it a 10 out of 10

The only issues I have are the seats are very small and so is the overhead storage. You should mention that while booking flights. I had plenty of knee room but I am wider than my seat, and I am not fat at all. The Mitsubishi 900 models need to be upgraded to western size people. I do not know how a 300 pound woman fit into those seats. I had to continuously lean away from the aisle to keep people and flight crew from bumping into my shoulder. 3 hour flight so no entertainment or food, just snacks and a drink, which was no big deal. The buttery/garlic pretzels were pretty tasty.

I was overcharged either by United or sister airline Air Canada. It's exhausting dealing with companies nowadays that irresponsibly abuse access to credit/debit cards.

The flight attendants that assisted me were exceptionally nice, kind and helpful

Everything you need to know for your flight to Colorado

Cabin class types available on flights to Colorado

Cabin classes available on flights to Colorado. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.