DEN - SYD

$405 Find Cheap Flights from Denver to Sydney

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to Sydney departing on 6/1. 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 Sydney

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Sydney.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Sydney.
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Everything you should know

Cheapest round-trip
$861
Overall average: $1,165
Qantas Airways
Wed 4/29Wed 5/6
DEN - SYD • 1 stop
Cheapest one-way
$405
Typical prices: $800-$903
Multiple Airlines
Mon 6/1
DEN - SYD • 2 stops
Top airlines
Cheapest • from $861 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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Nonstop flights
Not available
There are currently no direct flights between Denver and Sydney. You'll need at least 1 connection.
Insights
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Top layover airports
Cheapest • Avg $798 (round-trip)
Shortest trip • 20h 08m (one-way)
Insights
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When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 19% compared to booking last minute.
Insights
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Insights
When to travel
Cheapest • 14% price drop
Most popular
Good to know
Good to know
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Denver to Sydney (DEN-SYD)

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

Wed, Apr 29 - Wed, May 6
Qantas Airways Logo
7:58 pm - 7:05 am
DEN
-
SYD
19h 07m
1 stop
Qantas Airways Logo
9:10 am - 12:06 pm
SYD
-
DEN
18h 56m
1 stop
$861Qantas Airways
Wed, Apr 15 - Wed, Apr 22
Qantas Airways Logo
6:20 pm - 7:30 am
DEN
-
SYD
21h 10m
1 stop
Qantas Airways Logo
9:10 am - 12:06 pm
SYD
-
DEN
18h 56m
1 stop
$883Qantas Airways
Mon, Apr 13 - Sun, Apr 26
Qantas Airways Logo
8:35 pm - 7:05 am
DEN
-
SYD
18h 30m
1 stop
Qantas Airways Logo
9:10 am - 12:06 pm
SYD
-
DEN
18h 56m
1 stop
$885Qantas Airways
Mon, Apr 20 - Sun, May 3
Qantas Airways Logo
8:35 pm - 7:05 am
DEN
-
SYD
18h 30m
1 stop
Qantas Airways Logo
9:10 am - 12:06 pm
SYD
-
DEN
18h 56m
1 stop
$889Qantas Airways
Mon, Apr 13 - Mon, Apr 20
Qantas Airways Logo
8:35 pm - 7:05 am
DEN
-
SYD
18h 30m
1 stop
Qantas Airways Logo
9:10 am - 12:06 pm
SYD
-
DEN
18h 56m
1 stop
$890Qantas Airways
Tue, Apr 14 - Tue, Apr 21
Qantas Airways Logo
7:58 pm - 7:30 am
DEN
-
SYD
19h 32m
1 stop
Qantas Airways Logo
9:10 am - 12:06 pm
SYD
-
DEN
18h 56m
1 stop
$892Qantas Airways
Mon, Apr 13 - Sun, Apr 26
Qantas Airways Logo
6:20 pm - 7:30 am
DEN
-
SYD
21h 10m
1 stop
Qantas Airways Logo
9:10 am - 12:06 pm
SYD
-
DEN
18h 56m
1 stop
$918Qantas Airways
Mon, Apr 13 - Mon, Apr 20
Qantas Airways Logo
6:20 pm - 7:30 am
DEN
-
SYD
21h 10m
1 stop
Qantas Airways Logo
5:50 pm - 12:06 pm
SYD
-
DEN
34h 16m
1 stop
$930Qantas Airways
Fri, May 1 - Sun, May 10
Qantas Airways Logo
6:20 pm - 7:05 am
DEN
-
SYD
20h 45m
1 stop
Qantas Airways Logo
9:10 am - 12:06 pm
SYD
-
DEN
18h 56m
1 stop
$940Qantas Airways
Sat, Apr 18 - Tue, May 5
Qantas Airways Logo
6:20 pm - 7:30 am
DEN
-
SYD
21h 10m
1 stop
Qantas Airways Logo
9:10 am - 12:06 pm
SYD
-
DEN
18h 56m
1 stop
$942Qantas Airways
Booking Insights

KAYAK's insights & trends for Denver to Sydney flights

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Denver to Sydney, 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 Denver to Sydney is April, where tickets cost $1,165 (return) on average. On the other hand, the most expensive months are December and January, where the average cost of round-trip tickets is $1,698 and $1,545 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Denver to Sydney, 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 Denver to Sydney, you should book around 2 weeks before departure, which saves you about 19% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Good to know

Low seasonApril
Cheapest flight$405
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly with an average 24% increase in price.
Flight from Denver to Sydney

When to book flights from Denver to Sydney

Are your dates flexible? Find out the best times to travel from Denver to Sydney 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 Denver to Sydney

  • Where can I sleep at Sydney Airport?

    Book your stay at Mantra Hotel Sydney Airport, Rydges Sydney Airport, or Ibis Budget Sydney Airport. All three establishments are at the airport, with the first being a short walk from terminals 1 and 2. They offer both day rooms and overnight stays. Rydges Sydney Airport is in the international terminal and offers shuttle services from the domestic terminal. Ibis Budget Sydney Airport is located in the domestic terminal and has a paid shuttle service.

  • What family-friendly facilities are available at Sydney Airport?

    SYD has provided baby care facilities throughout the airport. In terminal 1, there's a nursing lounge with a sink and microwave around the baggage claim area. In terminal 2, the Parents' Rooms can be found both before and after security. If you're traveling with slightly older kids, take them to the children's play areas at SYD. The play areas are around gates 50, 10, and 53. The airport also has a kids' cinema, a kid-friendly place where kids can sit and watch TV shows. The children's cinema is near Gate 33.

  • How do I get to downtown Sydney from Sydney Airport?

    The train is the most efficient way of getting downtown from SYD. You can take the train from both terminals and tickets are available at the train stations. The public bus also serves the airport, Sydney Bus route 400 connects SYD to downtown Sydney. The bus has stops on the arrivals level of terminals 1 and 3. Shuttles are another great option - Redy2Go and Mozio offer door-to-door shuttle services from SYD to downtown and the surrounding areas. You can request these services from the SYD Travel Desk in the arrivals halls. Sheltered taxi lines are available in each terminal and car rental companies have counters in the arrivals halls of both terminals.

  • Is Denver International Airport suitable for disabled passengers?

    DEN offers wheelchair assistance to passengers with limited mobility visiting the airport. This service must be booked through your airline. There are also reserved parking spots, fast-track services, and accessible restrooms available. Barrier-free access is provided in the form of elevators and ramps. Low-vision passengers will find Aira services and deaf passengers have visual paging services and TDD telephones.

  • What is the cheapest flight from Denver to Sydney?

    In the last 3 days, the lowest price for a flight from Denver to Sydney was $405 for a one-way ticket and $861 for a round-trip.

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

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

  • Which airports will I be using when flying from Denver to Sydney?

    Denver airport is called Denver Intl and the only airport in Sydney is Sydney Kingsford Smith.

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

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

  • Which airline alliances offer flights from Denver to Sydney?

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

  • What is the most popular layover when flying to Sydney from Denver?

    Los Angeles is the most popular layover city among KAYAK users traveling from Denver to Sydney.

  • Which is the best airline for flights from Denver to Sydney, Fiji Airways or Air New Zealand?

    The two airlines most popular with KAYAK users for flights from Denver to Sydney are Fiji Airways and Air New Zealand. With an average price for the route of $1,191 and an overall rating of 8.1, Fiji Airways is the most popular choice. Air New Zealand is also a great choice for the route, with an average price of $1,285 and an overall rating of 8.0.

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

    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 Denver to Sydney.

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

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

    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 Sydney with an airline and back to Denver with another airline. Booking your flights between Denver and SYD 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 Denver to Sydney?

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

KAYAK’s top tips for finding a cheap flight from Denver to Sydney

  • Denver International Airport (DEN) has a hub and spoke layout with one main terminal and three concourses. You can get around the airport using the walkways or the underground train that runs every 10 minutes.
  • Unwind with a relaxing massage, pedicure, or manicure before your flight at XpresSpa at DEN. XpresSpa offers express spa services taking less than 30 minutes at DEN, and they are available inside security at gate C30 and in the center core.
  • There are no non-stop flights from Denver to Sydney. If you're on a single-layover flight on this route, the most common layover cities are San Francisco and Los Angeles.
  • Around 3,868 kg of carbon is emitted on flights from Denver to Sydney. Fly more sustainably with Delta Airlines - they offer a flight emitting 40% less carbon per passenger on this route.
  • If you need banking services as soon as you land at Sydney Airport (SYD), ANZ Bank runs a full-service branch at the airport that offers banking and currency exchange services. The bank is in the international terminal on level 2 near check-in counter J.

Reviews of the top 5 airlines serving from Denver to Sydney

 
See real verified KAYAK customer reviews for airlines flying from Denver to Sydney. 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 Denver to Sydney? 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.
7.9
DeltaOverall score based on 8288 reviews
8.1Boarding
7.2Food
8.5Crew
7.9Comfort
7.8Entertainment
Airline reviews

8 hours late and the plane smelled like urine, that smell in the morning when your child wet the bed in the night.

2.0 MediocreDouglas, Mar 2026
MSP - SEA
Read more Delta reviews

8 hours late and the plane smelled like urine, that smell in the morning when your child wet the bed in the night.

My flight was canceled on Sunday. Rebooking took three hours. Had to pay for accommodations another night. New flight was delayed for 5 hours, all that was sent was a 12 dollar food voucher, which doesn’t tell you how to use it. Then when we landed we had to sit on the plane for an hour before we could get off.

Miserable. This entire round trip was miserable. I booked evening flights to and from Detroit on consecutive days that should have had me at my destination by 10:30. Instead I arrived after 3am on my flight to Detroit and after midnight on my return. Multiple unforced errors like awaiting bags to get put on the plane for almost an hour in Detroit and a 20 minute delay to pull up to the gate in Atlanta has me rethinking my assumption that delta is the best and most reliable airline

Perhaps when you’re sitting in 1st class and the crew closes the bathroom for the pilots, there could be a notification other than holding your hands up as a blockade when you get there and you’re told the restrooms are closed please turn around … especially at night when visibility is poor and you’re met by a flight attendants with their arms up

First class is comfortable. Enjoyed a movie and was able to relax compared to coach.

Loved flying First Class. Very comfortable. The seat was amazing. Enjoyed a movie and was able to relax so much better than in coach.

We landed and sat on the tarmac for 45 minutes because they only have one gate at the airport and there was another plane running late so we had to wait

The WiFi was not working. That made for a long flight.

With Aeromexico it ended up good but with Delta it was bad because we did everything through Delta... Showed up at the Delta terminal... It was the wrong place! Nothing ever told us to go to the Aeromexico terminal. It said "in partnership with Aeromexico" but I was never instructed to check in with them or go to their terminal. We had to haul @$$ running through the airport and almost didn't make it thanks to this poor communication. 👎🏽

Absolutely no communication on why there's a delay and multiple flight time reschedules. I would have canceled the flight and drove back home if I known it was going to be rescheduled 3 or 4 times.

My experience was great overall. Tanya was particularly friendly and helpful the entire trip. I was very pleased with her customer service skills. The plane was an older aircraft but the entire way was comfortable with barely any turbulence at all. Qantas should speed up its fleet renovation. Totally recommend using this airline.

Qantas is always subpar beyond comfy chairs for a domestic flight

I liked boarding the plane. The staff were rude, the food was appalling and the chairs the most uncomfortable I have ever experienced

an hour late, then had to disembark on back stairs and take 4 flights up to get to main airport. No warning, and difficulty for those with canes and poor knees.

Well my expórtenle with Qantas it wasn’t that good KLM from Bs Aires was delay Santiago Chile Qantas QF 028 was still in the airport but the crew didn’t opened the door for me soo I lost my fly And I stuck in the airport 13 hrs waiting for next fly by Latam Arline My question is can I have my money back for business class

It was ok, the additional baggage charges were a bit excessive given winter is a time for skiing. To have to pay $600 extra for skis was tantamount to robbery. Airlines should consider sporting goods as baggage. Likewise, they should consider increasing the number of bags allowed on international flights to known ski destinations.

Flight was canceled. I was not alerted. It was only kayak that alerted me

Flight was 2.5 hours late leaving. We spent 50 minutes of that sitting on the plane with no explanation. They did reduce the time in the air so we arrived a little less late which was something. The cheese and crackers were okay but the wine was terrible.

Couldn't access entertainment on app as said in an email

Excellent as always, I won't fly to Australia, and back to the US on any other airline. The flight crew is always top notch, and have a way to make one feel extra special. Thank you for your service, I would rate Qantas Airways a 10+.

Flight left on time and we arrived 25 minutes early! There was a gate available when we arrived so early on a busy Sunday afternoon! Flight attendants came around twice with the drinks cart.

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

Sitting on the runway after we land for almost two hours! Not sure if we should blame United or Just Dumpy Vance.

Flight was late - I was downgraded from first class to coach

United overall experience is great these days. Airport experience was very organized. Staff on flight were great. App and information as good as it gets.

Great smooth flight. Had a seating change, but that was an improvement. Thanks United Airways Crew.

Flight was good but there are way to many announcements for credit cards etc.

Crew seemed a bit cranky. No seatback screens. But boarding was efficient and on time and we arrived early.

See previous note about the passenger in Denver who threw my husband's bag out of the overhead bin in order to maker room for his own. And the flight attendant back up the new passenger.

Jill was the flight attendant in first class she was fabulous!! Best flight attendant I have had in years.!! And I fly every other week. Other can learn from her!!

Really good. I accidentally left my duffel on the plane and the reps were so friendly in retrieving it.

My 9:50AM flight was delayed to 3:40PM "due to incoming aircraft delay". No aircraft is "delayed" that long. Found out once we did board (after several changes in times) that the aircraft had a maintenance issue and we had to wait for another aircraft. Just tell us that. The aircraft we did get was old and the seats need to be updated. I have been traveling for several weeks with AA and you should refresh your entertainment content as frequent flyers have gone through most of your new content. I have Celiac and a shellfish allergy and continue to have struggles with meals on business and first class flights. Please keep this in mind. Sorry - was a long travel day yesterday and a bit cranky this morning with my experience comments. Still an AA fan.

The business steward was absolutely amazing! Smiles and kindness! Wish all AA flights are like this one!

As a first class customer, there was no power the entire flight which limited my ability to work. I find this unacceptable. The first 11 rows on the left side of the plan were out. I was only offered the option to charge my phone which was not the issue because my laptop was out of power. I asked if there was anything that can be done for me, and the answer was, "no". I was not offered any type of compensation for this AA problem which caused me unnecessary stress due to inability to address business issues on an already challenging travel day. Flight attendants tried to reset the power once but that was the extent of their support. Very disappointing for the lack of expected services on a flight. Please contact me with customer focused response to this complaint.

Not really sure I enjoyed the flight at all. The flight attendants seemed a little tired and rude at times. The snacks were lacking in taste and sustenance. The flight was incredibly turbulent for three plus hours and the pilot had to do a second pass to land at our final destination because he was coming in so fast. He must have taken a short cut and because of it we had to suffer the violent turbulence and the dropping down. It had to be one of if not the worse flights I have ever been on and have traveled vastly all over the world.

Delay after delay with little communication then AA lost my luggage and at airport would not assist just said scan this QR code to track your luggage and submit a claim. However QR code provided did not work so have to go back to airport

After changing the departure gate 5 times making us mo e from one side of the airport to the other and then back the flight was delayed nearly 2 hours. The male flight attendant had a bad attitude with the guest being condescending, disrespectful with people who were already on edge.

Easy boarding. Rows are smaller but that may be an older and bigger me now :)

It would have been nice if American tried to care.

Departed Palm Springs over an hour late because there’s only one gate, and it has always delayed by the arriving and departing flight to Toronto and the arriving flight from Vancouver.

I checked a bag and there was only one agent to assist all customers with any issues.

I want to thank Carlos at the Miami AC desk - he was amazing and went over and above to help us out. Thank you Carlos and all the best to you!!! You made our faith in AC feel great! Sincerely, David Cubitt

Flight was canceled due to mechanical issues. After a considerable wait in the queue, Air Canada customer service was very helpful to get us on another flight. I am disappointed to report our rescheduled flight is for three days from now. Three days of extra expenses and inconvenience is unacceptable.

Extremely disappointing. My original Denver–Vancouver–Bangkok itinerary was cancelled due to a crewing issue. I was not proactively supported and had to drive back home after already reaching the airport. Communication was poor throughout, and attempts to contact customer service resulted in being on hold for nearly three hours without reaching anyone. Instead of being rebooked on the same direct routing the following day, I was rerouted onto a much longer itinerary via multiple cities and airlines, which resulted in arriving approximately 30 hours later than scheduled. At Denver airport, there was no visible Air Canada representative available to properly assist. Ground staff offered no real support beyond directing passengers to a phone number. There was no clear communication, no ownership, and no meaningful customer care during a major disruption. The final journey involved three flights instead of the original two, significantly increasing travel time and stress. Overall, the handling of the cancellation and lack of customer support was unacceptable. What could have been better? Clear communication during the cancellation Accessible customer service (phone support that actually answers) Proper in-person assistance at the airport Rebooking onto a comparable routing rather than a significantly longer one

Great setup on both flights except the last flight we got condensed dripping all over me in the last 20 mins of the flight

The last 3 hours it was freezing cold in row 56. Multiple people had their winter coats on and were utilizing the blankets provided by the airline. I also did not have easy access to figure out how to book my food allergy and advance for my meals. Most of everything I received was something I couldn't eat. This needs to be made more accessible. Also, I'm 5'10 which is the average height of the American male. I flew from Philadelphia to Toronto and then to Tokyo and the seats were absolutely unbearable. For that long of a flight it is impossible to get comfortable when doing anything. Flights need to have more space and stop prioritizing costs over people.

Was delayed at every point/ connection. Luggages missing for 5days. Had no medications for diabetes and high B/p. when bags where finally delivered on the 30th, the insulin and ozempic were no longer patent, as the ice pack had since dissolved and the authenticity of the med is now questionable, since they must be refrigerated. Please have them refund my bag fees. I should sue them for all the inconveniences caused to me.

The plane was delayed substantially due to a mechanical problem, that being said, the airline was very fair with providing a meal coupon for us. I would rather arrive late on a mechanically sound plane than the alternative. The food served in the plane was just awful, however and I recommend a new catering company.

We had a very long delay. First the inbound flight took a while, then maintenance, they “fixed it” to then do boarding and leave the gate, and waste a lot of time to have to go back to the gate and eventually deplane. Had to wait for a new aircraft, wait for a gate, and do the whole thing again. Instead of leaving at 9:50am we left until past 1. I could’ve not woken up at 5am, or spend some more time with my family if they gave more grace period of time between flights to give some time in case of any issues. But they have to make all and every dollar possible

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

Information on your arrival and departure airports