SYD - DEN

$572 Find Cheap Flights from Sydney to Denver

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 Denver departing on 8/13. 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

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

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

Cheap Flights from Sydney to Denver (SYD-DEN)

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

Fri, Sep 5 - Fri, Sep 12
 Logo
1:15 pm - 12:36 amSYD-DEN
27h 21m2 stops
 Logo
6:34 pm - 11:45 amDEN-SYD
25h 11m2 stops
Thu, Oct 16 - Sat, Oct 25
Air Canada Logo
10:20 am - 6:13 pmSYD-DEN
24h 53m1 stop
Air Canada Logo
7:52 am - 8:35 amDEN-SYD
31h 43m1 stop
$953Air Canada
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Wed, Aug 13 - Sat, Aug 30
Air Canada Logo
9:20 am - 6:01 pmSYD-DEN
24h 41m2 stops
Air Canada Logo
11:35 am - 7:20 amDEN-SYD
27h 45m1 stop
$958Air Canada
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Wed, Aug 13 - Sat, Aug 30
Qantas Airways Logo
9:10 am - 11:29 amSYD-DEN
18h 19m1 stop
Qantas Airways Logo
5:59 pm - 7:05 amDEN-SYD
21h 06m1 stop
$974Qantas Airways
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Wed, Aug 13 - Sat, Aug 30
Qantas Airways Logo
9:10 am - 11:29 amSYD-DEN
18h 19m1 stop
Qantas Airways Logo
6:00 am - 7:05 amDEN-SYD
33h 05m1 stop
$977Qantas Airways
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Tue, Oct 14 - Sat, Oct 18
United Airlines Logo
10:30 am - 3:00 pmSYD-DEN
21h 30m2 stops
United Airlines Logo
9:28 pm - 8:00 amDEN-SYD
41h 32m1 stop
$981United Airlines
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Tue, Oct 14 - Sat, Oct 18
United Airlines Logo
10:30 am - 6:13 pmSYD-DEN
24h 43m2 stops
United Airlines Logo
9:28 pm - 8:00 amDEN-SYD
41h 32m1 stop
$986United Airlines
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Fri, Sep 26 - Tue, Sep 30
American Airlines Logo
12:10 pm - 3:45 pmSYD-DEN
19h 35m1 stop
American Airlines Logo
6:00 am - 7:05 amDEN-SYD
33h 05m1 stop
$1,004American Airlines
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Wed, Aug 13 - Sat, Aug 30
American Airlines Logo
9:10 am - 7:48 pmSYD-DEN
26h 38m2 stops
American Airlines Logo
12:47 pm - 7:05 amDEN-SYD
26h 18m2 stops
$1,012American Airlines
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Thu, Sep 18 - Mon, Oct 6
Alaska Airlines Logo
9:40 pm - 10:02 pmSYD-DEN
40h 22m2 stops
Alaska Airlines Logo
6:20 pm - 7:45 pmDEN-SYD
56h 25m2 stops
$1,225Alaska Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Sydney to Denver flights

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

How much is a round-trip flight from Sydney to Denver?

What’s the cheapest day of the week to fly from Sydney to Denver?

The average price of all round-trip flights from Sydney to Denver clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Denver on a Tuesday and more expensive on a Friday. On your return trip to Sydney, you should consider flying back on a Tuesday, and avoid Thursdays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Sydney to Denver, 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 Denver is February, where tickets cost $738 (return) on average. On the other hand, the most expensive months are December and January, where the average cost of round-trip tickets is $1,611 and $1,349 respectively.

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

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 Denver, 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 Denver, you should book around 4 weeks before departure, which saves you about 25% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

Good to know

Low seasonSeptember
Cheapest flight$572
Best time to beat the crowds but there is an average 7% increase in price.
Most popular time to fly with an average 47% increase in price.
Flight from Sydney to Denver

When to book flights from Sydney to Denver

Are your dates flexible? Find out the best times to travel from Sydney to Denver based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Sydney to Denver

  • What is the cheapest flight from Sydney to Denver?

    In the last 3 days, the lowest price for a flight from Sydney to Denver was $572 for a one-way ticket and $941 for a round-trip.

  • Do I need a passport to fly between Sydney and Denver?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Sydney and on arrival in Denver.

  • Which aircraft models fly most regularly from Sydney to Denver?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Sydney to Denver?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Sydney and Denver, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Sydney to Denver, Qantas Airways or United Airlines?

    The two airlines most popular with KAYAK users for flights from Sydney to Denver are Qantas Airways and United Airlines. With an average price for the route of $1,011 and an overall rating of 7.5, Qantas Airways is the most popular choice. United Airlines is also a great choice for the route, with an average price of $1,529 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Sydney to Denver?

    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 Denver.

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

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

    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 to Denver with an airline and back to Sydney with another airline. Booking your flights between Sydney and DEN can sometimes prove cheaper using this method.

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

    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 to Denver from Sydney up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Sydney to Denver

 
See real verified KAYAK customer reviews for airlines flying from Sydney to Denver. 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 Denver? 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 887 reviews
6.9Food
7.2Entertainment
7.4Comfort
7.7Boarding
8.2Crew
Airline reviews

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.

2.0 MediocreAnonymous, Jul 2025LAX - ORD
Read more Qantas Airways reviews

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.

Business class points redemption - good value for points paid, dubious value if out of your own pocket, domestic class business product okay for this length of flight. The flight left and arrived on time, crew were good, aircraft was a bit old and tired, but still miles ahead of their competitors in Virgin and Jetstar.

Airline running better than post Covid, proper boarding process now implemented, some aircraft feeling a bit old and tired, crew fine, online experience better.

We were upgraded and after just a short delay in attending to a safety check we were on our way. Would definately fly Qantas International on their Dreamliner again.

Five hour flight instead of four hours due to westerly headwinds which wasn’t the fault of Qantas !

I tried to check in online but was unable to do so. I stood in line for nearly two hours to check in. American Airlines was understaffed. When I finally got to the kiosk to check in, I was still unable to check in. No AA staff was available to help. Finally one of the airport security agents who was helping passengers became of lack of AA Staff told me: “I think the reason you can’t check in is that you are starting your name with an upper case letter when you write it. Just write it with all lower case letters.” That did allow me to check in. HOW COULD ANYONE POSSIBLY KNOW THAT IF THEY USE AN INITIAL UPPER CASE LETTER TO SPELL THEIR OWN NAME, AA WOULD NOT ALLOW THEM TO CHECK IN?????? Then I had to wait in line over half an hour again to drop off my baggage. Although I arrived at the airport 3 hours early, by the time I got to the gate, they had already started boarding.

One of the oldest most uncomfortable "lay down" seats I've ever experienced. Old plane and old seats that don't lay flat. The seat back does not even recline - at all. Instead the legrest awkwardly extends to fill the gap between a small cubby into which you must insert your feet/legs. I am 5' 11" and could not lay straight but had to tuck my knees. Ticket was also very expensive. Would not recommend flying business/first on Finair from Melbourne to Bangkok and will not do so again myself.

The wifi was out. Otherwise it was great flight. Richard, as CSM, was excellent.

Traditional economy class. Not a full flight so spare seats. Food and drinks were good

Was bumped to a later flight because of inefficiency on part of the airline.

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

I never flew. Flight was canceled. DIA worst airport in the country. Avoid at all costs.

Very rough getting into denver. my kid threw up it was so rough.

Why wasn't this flight departure scheduled eith another crew so that it could leave on time? When we arrived in Denver we had so little time between flights we had run to the connecting flight. We should received some credit for the inconvenience.

Efficient, calm when things were delayed and kept us regularly informed of what was happening.

I was supposed to be on business class at first class from Denver back to Miami due to weather changes. I missed my connection and it’s put on a flight to Fort Lauderdale. Instead of honoring my business class/1st class ticket, they put me in coach, but there were two first class seats open. I think it’s absolutely disgusting that I paid for first class $1300 ticket and they put me in economy and they had to open seats available and I have still not been refunded the difference. I ended up having to eat a snack box instead of the meal I was supposed to get and did not get home till 2 AM so I think that’s a little pathetic that I had to live off crackers for dinner And my poor dog ate some cheese and salami. Oh yes, apparently when they switched me to the new flight they forgot to mention I had a service dog

Excellent service despite turbulence during the flight. Flight attendants were remarkable!

Flight attendant moved my bag without notifying me and was rude to me when I asked him about it. There was no reason to move it.

Plane temperature was comfortable (not to hot) when boarding and waiting for takeoff.

Food choices were very limited. Taste of the dishes was average.

Very poor delay in dfw was really bad n long

Our flight was 1.5 hours delayed. There was no weather for the inbound flight, so I don't understand why. This meant a VERY late arrival and only a quick nap before my morning flight.

Because of rescheduling, they had to put me on a flight that didn't go through Dallas

It was very difficult to stretch my knee out and I am very short. I also had a torn tendon in my knee which made it extra uncomfortable anyways. My husband is 6'2" and I can't imagine him flying in that plane.

3 hour weather delay followed by 1 hour (and counting) maintenance delay. UGH!

Couldn’t get the door on the plane to close leading to a nearly 2 hour delay. But, hey at least they didn’t cancel the flight.

Very clean and comfortable cabin. Amazing Mediterranean salad for lunch before landing. Great range of films to watch. Really quiet and easy to sleep on the flight also. The initial food was a bit weird: odd fried chicken pieces in some weird white gloop, but that would be my lack of cultural knowledge on the grub. Salad more than made up for it at the other end. Staff were super attentive and helpful. Great and easy flight

International baggage recheck process in Philadelphia was a disaster. Waited 1 hour and 45 minutes to receive our bags. Waited 15 minutes to recheck bags, flight notification boards were blank so we asked an AA representative for our connecting gate and we were directed to the wrong terminal and gate. Our connection window was over 3 hours and we made our flight by 5 minutes. We pulled away from the gate and sat on the runway for 1 1/2 hours. 1 of our 4 bags didn’t make it to Phoenix. The mobile app for lost baggage didn’t work, the AA rep had to manually fix.

I miss my flight and they could not rebook me that day because the other flight was full, and for the next day I had to pay a whole new fee again which I think is unprofessional

Flight was cancelled 3 hrs AFTER etd. Thetefore Missed connection from JFK to New Zealand . No accommodation provided… This cost ne aporox 1000 USD in extra expenses and turned whst should have been a 24 hr trip ftom Boston - New Zealand into a VERY expensive , late 70+ hr nightmare … Complete nonsense!!!

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

Information on your arrival and departure airports

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