DEN - SYD

$449 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 11/1. 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

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.
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

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

Tue, Nov 11 - Tue, Nov 18
Alaska Airlines Logo
8:02 pm - 7:45 pmDEN-SYD
29h 43m2 stops
Alaska Airlines Logo
9:40 pm - 12:27 pmSYD-DEN
32h 47m2 stops
$1,015Alaska Airlines
Find Deal
Wed, Oct 22 - Sat, Nov 1
Alaska Airlines Logo
6:20 pm - 7:45 pmDEN-SYD
32h 25m2 stops
Alaska Airlines Logo
9:40 pm - 1:27 pmSYD-DEN
32h 47m2 stops
$1,032Alaska Airlines
Find Deal
Wed, Oct 22 - Sat, Nov 1
Alaska Airlines Logo
6:20 pm - 7:45 pmDEN-SYD
32h 25m2 stops
Alaska Airlines Logo
9:40 pm - 1:27 pmSYD-DEN
32h 47m2 stops
$1,033Alaska Airlines
Find Deal
Tue, Nov 11 - Thu, Nov 20
Multiple Airlines Logo
10:00 am - 6:10 amDEN-SYD
26h 10m2 stops
Multiple Airlines Logo
5:45 pm - 6:28 pmSYD-DEN
18h 43m1 stop
$1,096Multiple Airlines
Find Deal
Tue, Nov 11 - Tue, Nov 18
Multiple Airlines Logo
10:00 am - 6:10 amDEN-SYD
26h 10m2 stops
Multiple Airlines Logo
5:45 pm - 10:18 amSYD-DEN
34h 33m1 stop
$1,112Multiple Airlines
Find Deal
Sun, Feb 1 - Sat, Feb 28
Hawaiian Airlines Logo
12:35 pm - 7:45 pmDEN-SYD
37h 10m2 stops
Hawaiian Airlines Logo
9:40 pm - 11:39 amSYD-DEN
31h 59m2 stops
$1,153Hawaiian Airlines
Find Deal
Wed, Feb 25 - Wed, Mar 4
Air New Zealand Logo
4:03 pm - 8:45 amDEN-SYD
22h 42m2 stops
Air New Zealand Logo
1:55 pm - 6:23 pmSYD-DEN
22h 28m2 stops
$1,161Air New Zealand
Find Deal
Wed, Nov 12 - Wed, Nov 26
Air New Zealand Logo
4:05 pm - 8:45 amDEN-SYD
22h 40m2 stops
Air New Zealand Logo
1:55 pm - 5:58 pmSYD-DEN
22h 03m2 stops
$1,164Air New Zealand
Find Deal
Tue, Oct 14 - Tue, Oct 21
Hawaiian Airlines Logo
3:02 pm - 7:45 pmDEN-SYD
35h 43m2 stops
Hawaiian Airlines Logo
9:40 pm - 11:53 amSYD-DEN
31h 13m2 stops
$1,228Hawaiian Airlines
Find Deal
Sun, Nov 9 - Sat, Nov 15
Air Canada Logo
8:45 am - 9:35 amDEN-SYD
30h 50m1 stop
Air Canada Logo
11:20 am - 12:37 pmSYD-DEN
19h 17m1 stop
$1,249Air Canada
Find Deal

Everything you should know

Top airlines
Alaska Airlines
Cheapest • from $1,015 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Video guide: How to find cheap flights to Sydney
Watch video
Watch video
Watch video
Watch video
When to book
5 weeks
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 21% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
April
Cheapest • 18% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$1,015
Overall average: $1,274
Alaska Airlines
Tue 11/11Tue 11/18
DEN - SYD • 2 stops
Cheapest one-way
$449
Typical prices: $693-913
Multiple Airlines
Sat 11/1
DEN - SYD • 2 stops
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Sydney!
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.

Find cheap flights to Sydney
Find cheap flights to Sydney

Planning a trip from Denver to Sydney? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.

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

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

If your flying dates are flexible, you should consider flying to Sydney on a Tuesday, as we generally find the cheapest rates on that day for this route. On the other hand, Thursday is the most expensive day to fly from Denver to Sydney. For your return ticket, we recommend flying on a Tuesday and avoiding Fridays for the best deals.

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 $871 (return) on average. On the other hand, the most expensive months are December and November, where the average cost of round-trip tickets is $1,433 and $1,274 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 5 weeks before departure, which saves you about 21% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Good to know

Low seasonAugust
Cheapest flight$449
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly and prices are also 17% lower on average.
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 $449 for a one-way ticket and $1,015 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?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between Denver and Sydney, with oneworld 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, Alaska Airlines or Air New Zealand?

    The two airlines most popular with KAYAK users for flights from Denver to Sydney are Alaska Airlines and Air New Zealand. With an average price for the route of $856 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Air New Zealand is also a great choice for the route, with an average price of $1,236 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 7954 reviews
7.9Comfort
8.2Boarding
7.9Entertainment
7.3Food
8.5Crew
Airline reviews

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

10.0 ExcellentAnonymous, Sep 2025CLT - BOS
Read more Delta reviews

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

The food was terrible especially for a 15 hour international flight. The crew was unpleasant as well.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Quick check in. Everything went smooth. I don't know what can be done about airline food.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

Nothing special. The crew never went out of their way for anything.

Three seats in first class were broken and while they were able to still acommodate us it was looking very touch and go and they had others they could not acommodate

A few more inches of legroom is all i ask

One of the best Qantas business flights I've had. Quality product

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.

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

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

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

The Emerits/Qantas flight was cancelled to Wellington. We need a refund. Had to buy another airline ticket. How do we get the refund. Still not in Wellington.

Delayed QF59 flight once again, Qantas doesn't fail in maintaining there delayed departures and arrivals. USB points do not work nor do the power point sockets on the plane, Qantas staff admitted that on the flight. Don't expect to your charge devices. Saving grace, was the ice cream. Bottom line, if you expect to fly to HND and make it on time avoid Qantas and if you're interested in ice cream - visit 7/11.

Pretty excellent. I don’t know what the pilot could have done better with the bumping ( there was a storm) nor what happened to my ears coming down into bendigo. It doesn’t happen coming down into Sydney just the return flight. I wonder why?

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

The seat and leg room was not good. The food and beverage service was good.

For economy, it was very good. Staff was great, they even let some of us change seats for more leg room... Put an empty seat between us which was fantastic for a 12hr flight. Onboard entertainment was excellent, I think over 200 choices of movies/tv/etc The bad was the barely/nonfunctional wifi that cost either $16.99 or 1700 miles (full flight). It was atrocious... Definitely the worst of the last 3 long haul major airlines I was on the last few months.

Electric plugs didn't work. Entertainment system wasn't working

The design of the light switch on the arm rest is ridiculous.

The gate attendant let me walk right by her with a bag too big for the overhead compartment

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

Overall, it was a good experience. Boarding was good and there was plenty of overhead bin space for everyone’s carryons (even when we boarded toward the end). Only improvement would be to offer trash service more regularly.

David went above and beyond to make our flight the best that it could be

Given it’s a red-eye into Charolotte, we didn’t get any food. The survey does not include “N/A” so the rating will be skewed.

Great. Quick and quiet and east. The breakfast choices were a welcome surprise!

American airlines suck they delay the flights all the time made me sleep in an airport because my flight was delayed and I miss my connecting flight

There's nothing I liked about it. For first off I scheduled this trip two weeks in advance then they delayed my flight which messed up my whole trip. So I scheduled it for the following weekend thinking there won't be a delay and guess what as soon as I got to the airport we said in the airplane on the tarmac for an hour and a half. Not only was it delayed I missed my connecting flight meaning I had to stay the night at Dallas-Fort Worth airport sleeping on the floor. I will tell you this I will never fly American airlines ever again I have had nothing but horrible experience with them and I just throw money at them

The stewardess hit me with the food kart twice on the head and didn't say I'm sorry once. The same stewardess gave me a warm Apple Juice with No ice. The Flight was delayed for Departure 6 times, starting from 2:36pm, finally taking off 7:50pm. I was late picking up my child from the sitter by 3 hours.

Don’t know they cancelled the flight day before I was to leave. They sent a email at 9:00 pm at night saying they cancelled. That is the smooth way to say we don’t want your business! I think they didn’t have enough people booking so they cancelled the flight! It’s all about the money anymore there is no honesty in business.

Having to reschedule flights a day later, they loaded by luggage on the wrong plane from Little rock now I have to HOPE they deliver it to where im staying like they said would. International flight crew was very disgruntled and not very friendly.

We will be writing a long, detailed letter to corporate about our awful experience with American airlines.

It took way too long to diagnose and solve the problem of a broken crew member cabin seat. Though compensation for the volunteer who left the flight was very kind.

The entertainment package was vast and the selections were very current. Keep updating it was great.

For the price, it was a really good experience. There was no entertainment on board, so I couldn't really rate this, and I didn't order a meal. I appreciated that there was a free glass of wine.

Short flight. Everything was fine except the flight was delayed twice for a total of an hour.

My flight from New York to Canada and Canada to Brisbane was canceled, so I had to take united airlines instead flight from New York to Dubai then layover in Dubai 8 hours then from Dubai to Brisbane it was extremely difficult for me , it was a nightmare flying with Canadian airlines unfortunately.

I found the boarding easy and my seat was very comfortable as I had a lot of leg room. I am not too happy that I no longer have lounge access even though I used to get it with my TD credit card.

Flight cancelled. Major disruption to our travel. Do not use Air Canada from KC. To few flights.

Real smooth and easy, Real good leg room in coach!

There labor disputes cancelled my flight less than 24 hours before my boarding time but there customer service/website was easy enough to navigate and they rebooked me for no upcharge.

Re luggage I carried a backpack only. I did not check any bags in. However there were other passengers with carry on luggage going in the plane. My question is why are others allowed to have a carry on luggage inside the plane? Shouldn’t they have dropped it off at the gate? I’m asking because I could have brought the same thing instead of a backpack only. Please clarify for future reference. Thank you.

Like the service. Very hard to communicate or contact when have problems

Very bad, flight was cancelled due to strike and staff was unable to rebook us

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.