Cheap flights from Ottawa to Aspen from CA $245

View CA $245 flight on Mon, Sep. 1, 2025Opens in a new window

Popular airlines from Ottawa to Aspen

  • 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 30% 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 Ottawa (YOW) to Aspen (DEN)

Prices were available within the past 7 days and start at CA $245 for one-way flights and CA $422 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Mon, Nov. 3 - Mon, Nov. 24
YOW
Ottawa
DEN
Denver
CA $422 Roundtrip, found 3 days ago
CA $422
Roundtrip
found 3 days ago
Select Air Canada flight, departing Mon, Nov. 3 from Ottawa to Denver, returning Mon, Nov. 24, priced at CA $422 found 3 days ago
Air Canada
Thu, Sep. 11 - Fri, Sep. 12
YOW
Ottawa
DEN
Denver
CA $422 Roundtrip, found 3 days ago
CA $422
Roundtrip
found 3 days ago
Select Air Canada flight, departing Thu, Sep. 11 from Ottawa to Denver, returning Fri, Sep. 12, priced at CA $422 found 3 days ago
Air Canada
Mon, Sep. 1 - Mon, Sep. 8
YOW
Ottawa
DEN
Denver
CA $422 Roundtrip, found 1 day ago
CA $422
Roundtrip
found 1 day ago
Select Air Canada flight, departing Mon, Sep. 1 from Ottawa to Denver, returning Mon, Sep. 8, priced at CA $422 found 1 day ago
United
Sat, Sep. 13 - Sun, Sep. 14
YOW
Ottawa
DEN
Denver
CA $429 Roundtrip, found 3 days ago
CA $429
Roundtrip
found 3 days ago
Select United flight, departing Sat, Sep. 13 from Ottawa to Denver, returning Sun, Sep. 14, priced at CA $429 found 3 days ago
United
Sat, Sep. 13 - Sun, Sep. 14
YOW
Ottawa
DEN
Denver
CA $431 Roundtrip, found 3 days ago
CA $431
Roundtrip
found 3 days ago
Select United flight, departing Sat, Sep. 13 from Ottawa to Denver, returning Sun, Sep. 14, priced at CA $431 found 3 days ago
WestJet
Sun, Sep. 14 - Tue, Sep. 16
YOW
Ottawa
DEN
Denver
CA $476 Roundtrip, found 3 days ago
CA $476
Roundtrip
found 3 days ago
Select WestJet flight, departing Sun, Sep. 14 from Ottawa to Denver, returning Tue, Sep. 16, priced at CA $476 found 3 days ago

Find the cheapest month to fly from Ottawa (YOW) to Denver (DEN)

September is typically the cheapest month to fly

From CA $298 - CA $873 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.