$440 Find Cheap Flights from Sydney to Colorado

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Sydney to Colorado departing on 3/16. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Colorado

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sydney to Colorado, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sydney to Colorado, as well as popular online travel agencies
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Cheap Flights from Sydney to Colorado

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Denver
Denver2 stops$878
Aspen
Aspen1 stop$1,378
Denver
Denver2 stops$878
Aspen
Aspen1 stop$1,378

Book Cheap Sydney to Colorado Plane Tickets

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

Tue, Mar 17 - Tue, Mar 24
Multiple Airlines Logo
2:00 pm - 12:30 am
SYD
-
DEN
27h 30m
2 stops
Multiple Airlines Logo
9:00 am - 12:35 pm
DEN
-
SYD
34h 35m
2 stops
$878Multiple Airlines
Mon, Mar 16 - Mon, Mar 23
Multiple Airlines Logo
2:00 pm - 12:30 am
SYD
-
DEN
27h 30m
2 stops
Multiple Airlines Logo
10:29 pm - 7:25 am
DEN
-
SYD
39h 56m
1 stop
$915Multiple Airlines
Mon, Mar 16 - Mon, Mar 23
Multiple Airlines Logo
2:00 pm - 12:30 am
SYD
-
DEN
27h 30m
2 stops
Multiple Airlines Logo
10:29 pm - 7:25 am
DEN
-
SYD
39h 56m
1 stop
$920Multiple Airlines
Tue, Jun 23 - Wed, Jul 1
United Airlines Logo
9:30 am - 1:41 pm
SYD
-
ASE
20h 11m
1 stop
United Airlines Logo
8:00 pm - 7:00 am
ASE
-
SYD
19h 00m
1 stop
$1,378United Airlines
Sun, Mar 15 - Sun, Mar 22
United Airlines Logo
2:00 pm - 4:34 pm
SYD
-
COS
19h 34m
2 stops
United Airlines Logo
1:32 pm - 7:00 am
COS
-
SYD
24h 28m
2 stops
$1,641United Airlines
Wed, Feb 18 - Sat, Feb 21
American Airlines Logo
11:20 am - 9:50 am
SYD
-
COS
40h 30m
2 stops
American Airlines Logo
7:38 am - 6:55 am
COS
-
SYD
29h 17m
1 stop
$1,711American Airlines
Wed, Feb 18 - Sat, Feb 21
American Airlines Logo
11:20 am - 9:50 am
SYD
-
COS
40h 30m
2 stops
American Airlines Logo
7:38 am - 6:55 am
COS
-
SYD
29h 17m
1 stop
$1,715American Airlines
Wed, Feb 18 - Sat, Feb 21
Qantas Airways Logo
2:05 pm - 3:58 pm
SYD
-
COS
19h 53m
1 stop
Qantas Airways Logo
1:39 pm - 6:55 am
COS
-
SYD
23h 16m
1 stop
$2,236Qantas Airways
Tue, Jun 23 - Wed, Jul 1
Qantas Airways Logo
5:30 pm - 5:17 pm
SYD
-
ASE
39h 47m
3 stops
Qantas Airways Logo
2:20 pm - 8:40 am
ASE
-
SYD
26h 20m
2 stops
$2,595Qantas Airways
Tue, Jun 23 - Wed, Jul 1
Qatar Airways Logo
7:00 pm - 8:16 pm
SYD
-
ASE
41h 16m
3 stops
Qatar Airways Logo
11:38 am - 6:15 am
ASE
-
SYD
50h 37m
2 stops
$3,332Qatar Airways
Booking Insights

KAYAK's insights & trends for Sydney to Colorado flights

Get data-powered insights and trends into flights from Sydney 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 Sydney to Colorado?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Sydney 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 Sydney to Colorado is February, when tickets cost $752 (return) on average. On the other hand, the most expensive months are January and December, when the average cost of round-trip tickets is $1,335 and $1,284 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Sydney 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 Sydney to Colorado, you should book around 2 weeks before departure, which saves you about 17% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 20 weeks before departure.

Good to know

Low seasonNovember
Cheapest flight$440
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 12% lower on average.
Flight from Sydney to Denver

FAQs - booking Colorado flights

  • How does KAYAK find such low prices on flights from Sydney 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 Sydney to Colorado.

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

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

 
See real verified KAYAK customer reviews for airlines flying from Sydney to Colorado. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. 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 Sydney 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.
7.5
Qantas AirwaysOverall score based on 982 reviews
7.7Boarding
7.2Entertainment
8.2Crew
7.0Food
7.5Comfort
Airline reviews

Hard to move and get out of my seat when the passenger in front is in recline position.

2.0 MediocreAnonymous, Jan 2026
MEL - LAX
Read more Qantas Airways reviews

Hard to move and get out of my seat when the passenger in front is in recline position.

It was a good flight and no complaints. It just wasn't anything that was better than any other flight.

The crew were wonderful - if only the customers were as well behaved as the attendants!! Ha ha! If you could just talk to God and ask for less turbulence next time.... Juuuuust kidding....

Basic airline, aircraft and service. AA gets you from point A to B. My flight was delayed by 2 hours too.

No internet on flight, which makes log travels really hard.

My flight from Dallas to Sydney was cancelled. My entire trip was rerouted to include the following: Hartford to Washington DC Washington DC to JFK JFK to Auckland Auckland to Christchurch I paid for an aisle seat on the flight to Auckland and was asked if I would take a window seat to accommodate a family. The agent at the podium failed to mention that the family had a 3 month old baby and that a bassinet would be used during the 16 hour flight. The only way I could get out of my seat was to crawl under the bassinet of the sleeping baby. I think it is wrong that I was no given the choice to sit in another seat, that the agent knew what she was doing and chose to not properly disclose my seating arrangement. Terrible treatment.

they ran out of fruit for breakfast and so I just had a yogurt instead. other than that the flight was good

by the time they got to our row, they were out of some of the food options. games and movies were great but maybe more game options like tetris or pac man would be great

Great as usual, some delays but well communicated and made up for in the air

Poor! This flight was delayed 14 hours. There was no assistance in helping customers find other routes to their destination, nor any other kind of support. It was a chaotic experience. I'm not likely to fly with AA going forward.

I just think it’s unfortunate that Airlines have completely abandoned the idea of serving any kind of decent or even real food on flights, not even on a four hour flight!? Those days are gone, I guess.

It was good but only meal served is very less. Meantime good to add rice and chicken in one of meal

The flight was delayed by two de-icings. The seatbelt did not work correctly. It did not stay tight.

Hotter than Hades in August. Why, why do crews think that in the winter when we are already dressed for cold weather we need a cabin that is 82 degrees. Even the vents were blowing hot air.

Flight was delayed. De-icing took a while. When we landed had to wait for another plane to vacate our gate. Just an overall bad experience.

Not good - outbound flight was delayed and missed my connection even though I got to the gate after running through the airport - the agent would not let me on because the door was closed (flight had not left). There was no notification from United - overall experience was very disappointing. Additionally, I was downgraded from first class to coach on the alternative flight

United have really come back. Airport and boarding process is clear and good, app and information also very good

We Left Calgary 1/2 hour late and that made for a tight connection in Denver. After arriving everything was done to help us make our connection. That was a great effort. Thank You United

The entertainment available didn’t work for anyone on the flight. Long 6 hr flight with no entertainment option and the staff didn’t know until an hour into the flight when we made sure they knew about it. They had no way to fix it.

Late FA meant slow boarding. WiFi did not work. I’m a medium plus sized passenger. The seatbelt was for the first time ever barely fitting. And we delayed on the tarmac 40 min

Everything you need to know for your flight from Sydney to Colorado

Information on your arrival and departure airports