Cheap flights from Sydney to North Keystone

View AU$775 flight on Sun, 1 Feb. 2026Opens in a new window

Popular airlines from Sydney to North Keystone

  • American Airlines

    American Airlines

  • United

    United

  • Air Canada

    Air Canada

  • Qantas Airways

    Qantas Airways

  • Delta

    Delta

  • Virgin Australia

    Virgin Australia

  • Air New Zealand

    Air New Zealand

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 35% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from Sydney (SYD) to North Keystone (DEN)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sun, 1 Feb. - Thu, 12 Feb.
SYD
Sydney
EGE
Vail
AU$1,298 Return, found 4 hours ago
AU$1,298
Return
found 4 hours ago
Select Delta flight, departing Sun, 1 Feb. from Sydney to Vail, returning Thu, 12 Feb., priced at AU$1,298 found 4 hours ago
Air Canada
Sun, 31 Aug. - Sun, 7 Sep.
SYD
Sydney
DEN
Denver
AU$1,550 Return, just found
AU$1,550
Return
just found
Select Air Canada flight, departing Sun, 31 Aug. from Sydney to Denver, returning Sun, 7 Sep., priced at AU$1,550 just found
Air New Zealand
Tue, 2 Sep. - Tue, 9 Sep.
SYD
Sydney
DEN
Denver
AU$1,611 Return, just found
AU$1,611
Return
just found
Select Air New Zealand flight, departing Tue, 2 Sep. from Sydney to Denver, returning Tue, 9 Sep., priced at AU$1,611 just found
American Airlines
Wed, 13 Aug. - Thu, 4 Sep.
SYD
Sydney
DEN
Denver
AU$1,633 Return, found 22 hours ago
AU$1,633
Return
found 22 hours ago
Select American Airlines flight, departing Wed, 13 Aug. from Sydney to Denver, returning Thu, 4 Sep., priced at AU$1,633 found 22 hours ago
Hawaiian Airlines
Tue, 28 Oct. - Wed, 12 Nov.
SYD
Sydney
DEN
Denver
AU$1,672 Return, found 1 day ago
AU$1,672
Return
found 1 day ago
Select Hawaiian Airlines flight, departing Tue, 28 Oct. from Sydney to Denver, returning Wed, 12 Nov., priced at AU$1,672 found 1 day ago
United
Thu, 11 Dec. - Tue, 30 Dec.
SYD
Sydney
DEN
Denver
AU$1,971 Return, just found
AU$1,971
Return
just found
Select United flight, departing Thu, 11 Dec. from Sydney to Denver, returning Tue, 30 Dec., priced at AU$1,971 just found

Find the cheapest month to fly from Sydney (SYD) to Denver (DEN)

February is typically the cheapest month to fly

From AU$1,113 - AU$2,031 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.