Cheap flights from Montreal to North Keystone from CA $270

View CA $270 flight on Sun, Aug. 24, 2025Opens in a new window

Popular airlines from Montreal to North Keystone

  • American Airlines

    American Airlines

  • Delta

    Delta

  • WestJet

    WestJet

  • United

    United

  • Air Canada

    Air Canada

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Cheap flights from Montreal (YMQ) to North Keystone (DEN)

Prices were available within the past 7 days and start at CA $270 for one-way flights and CA $467 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Thu, Oct. 30 - Mon, Nov. 3
YUL
Montreal
DEN
Denver
CA $467 Roundtrip, found 2 hours ago
CA $467
Roundtrip
found 2 hours ago
Select Air Canada flight, departing Thu, Oct. 30 from Montreal to Denver, returning Mon, Nov. 3, priced at CA $467 found 2 hours ago
United
Sat, Sep. 6 - Sat, Sep. 13
YUL
Montreal
DEN
Denver
CA $474 Roundtrip, found 7 hours ago
CA $474
Roundtrip
found 7 hours ago
Select United flight, departing Sat, Sep. 6 from Montreal to Denver, returning Sat, Sep. 13, priced at CA $474 found 7 hours ago
American Airlines
Sun, Sep. 7 - Thu, Sep. 11
YUL
Montreal
DEN
Denver
CA $474 Roundtrip, found 7 hours ago
CA $474
Roundtrip
found 7 hours ago
Select American Airlines flight, departing Sun, Sep. 7 from Montreal to Denver, returning Thu, Sep. 11, priced at CA $474 found 7 hours ago
Delta
Sun, Sep. 7 - Wed, Sep. 10
YUL
Montreal
DEN
Denver
CA $474 Roundtrip, found 7 hours ago
CA $474
Roundtrip
found 7 hours ago
Select Delta flight, departing Sun, Sep. 7 from Montreal to Denver, returning Wed, Sep. 10, priced at CA $474 found 7 hours ago
Air Canada
Thu, Oct. 30 - Mon, Nov. 3
YUL
Montreal
DEN
Denver
CA $476 Roundtrip, found 2 hours ago
CA $476
Roundtrip
found 2 hours ago
Select Air Canada flight, departing Thu, Oct. 30 from Montreal to Denver, returning Mon, Nov. 3, priced at CA $476 found 2 hours ago
WestJet
Sun, Sep. 7 - Sun, Sep. 14
YUL
Montreal
DEN
Denver
CA $521 Roundtrip, found 22 hours ago
CA $521
Roundtrip
found 22 hours ago
Select WestJet flight, departing Sun, Sep. 7 from Montreal to Denver, returning Sun, Sep. 14, priced at CA $521 found 22 hours ago

Find the cheapest month to fly from Montreal (YMQ) to Denver (DEN)

September is typically the cheapest month to fly

From CA $360 - CA $1,020 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.