Flights To Boulder County - Cheap Flights Starting at CA $137

Wander Wisely with exceptional service, 24/7 supportOpens in a new window

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

Jet to one of Boulder County's top cities

A street corner with a traffic light, a street sign reading "Pearl St Mall 1900", and a brick building with multiple windows.

Boulder

Flights
Boulder
A snow-capped mountain range with a visible moon in the sky.

Longmont

Flights
Longmont

How Much Does it Cost To Fly To Boulder County?

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Sat, Nov 7 - Tue, Nov 10
DTW
Detroit Metropolitan Wayne County
DEN
Denver Intl.
CA $272 Roundtrip, found 13 hours ago
CA $272
Roundtrip
found 13 hours ago
Select Delta flight, departing Sat, Nov 7 from Detroit Metropolitan Wayne County to Denver Intl., returning Tue, Nov 10, priced at CA $272 found 13 hours ago
Thu, Sep 17 - Tue, Oct 6
DTW
Detroit Metropolitan Wayne County
DEN
Denver Intl.
CA $319 Roundtrip, found 5 days ago
CA $319
Roundtrip
found 5 days ago
Select American Airlines flight, departing Thu, Sep 17 from Detroit Metropolitan Wayne County to Denver Intl., returning Tue, Oct 6, priced at CA $319 found 5 days ago
Mon, Nov 2 - Tue, Nov 10
DTW
Detroit Metropolitan Wayne County
DEN
Denver Intl.
CA $321 Roundtrip, found 13 hours ago
CA $321
Roundtrip
found 13 hours ago
Select Delta flight, departing Mon, Nov 2 from Detroit Metropolitan Wayne County to Denver Intl., returning Tue, Nov 10, priced at CA $321 found 13 hours ago
Sun, Sep 27 - Sun, Oct 4
YVR
Vancouver Intl.
DEN
Denver Intl.
CA $357 Roundtrip, found 15 hours ago
CA $357
Roundtrip
found 15 hours ago
Select WestJet flight, departing Sun, Sep 27 from Vancouver Intl. to Denver Intl., returning Sun, Oct 4, priced at CA $357 found 15 hours ago
Sun, Sep 27 - Sun, Oct 4
YYC
Calgary Intl.
DEN
Denver Intl.
CA $359 Roundtrip, found 11 hours ago
CA $359
Roundtrip
found 11 hours ago
Select WestJet flight, departing Sun, Sep 27 from Calgary Intl. to Denver Intl., returning Sun, Oct 4, priced at CA $359 found 11 hours ago
Thu, Sep 17 - Tue, Oct 6
DTW
Detroit Metropolitan Wayne County
DEN
Denver Intl.
CA $361 Roundtrip, found 5 days ago
CA $361
Roundtrip
found 5 days ago
Select American Airlines flight, departing Thu, Sep 17 from Detroit Metropolitan Wayne County to Denver Intl., returning Tue, Oct 6, priced at CA $361 found 5 days ago
Fri, Sep 11 - Sun, Sep 13
YEG
Edmonton Intl.
DEN
Denver Intl.
CA $362 Roundtrip, found 1 hour ago
CA $362
Roundtrip
found 1 hour ago
Select WestJet flight, departing Fri, Sep 11 from Edmonton Intl. to Denver Intl., returning Sun, Sep 13, priced at CA $362 found 1 hour ago
Sun, Oct 11 - Thu, Oct 15
YYC
Calgary Intl.
DEN
Denver Intl.
CA $375 Roundtrip, just found
CA $375
Roundtrip
just found
Select United flight, departing Sun, Oct 11 from Calgary Intl. to Denver Intl., returning Thu, Oct 15, priced at CA $375 just found
Tue, Sep 1 - Thu, Oct 1
YYC
Calgary Intl.
DEN
Denver Intl.
CA $378 Roundtrip, found 18 hours ago
CA $378
Roundtrip
found 18 hours ago
Select Air Canada flight, departing Tue, Sep 1 from Calgary Intl. to Denver Intl., returning Thu, Oct 1, priced at CA $378 found 18 hours ago
OriginDestinationTravel datesFlights from*
MSPDenverNovember 2 to November 5CA $203
PHXDenverSeptember 19 to September 26CA $245
DFWDenverSeptember 16 to September 19CA $245
LAXDenverSeptember 10 to September 17CA $300
BOSDenverOctober 29 to November 4CA $300
ORDDenverSeptember 14 to September 18CA $311
JFKDenverSeptember 22 to September 29CA $395
PHLDenverOctober 28 to October 30CA $459
MIADenverOctober 15 to October 19CA $472
ATLDenverSeptember 13 to September 19CA $480
*Prices include taxes and fees
OriginDestinationTravel datesFlights from*
MSPDenverAugust 28 to September 1CA $463
PHXDenverAugust 29 to September 3CA $473
LAXDenverAugust 29 to September 2CA $542
MIADenverAugust 28 to August 31CA $677
DFWDenverAugust 30 to August 31CA $692
PHLDenverAugust 30 to September 1CA $700
JFKDenverAugust 28 to September 1CA $755
BOSDenverAugust 30 to September 3CA $767
ORDDenverAugust 28 to September 3CA $799
ATLDenverAugust 28 to August 30CA $1,237
*Prices include taxes and fees
Price found within the past 48 hours. Click for updated prices.
La Quinta Inn & Suites by Wyndham Denver Gateway Park
3.0-star property

La Quinta Inn & Suites by Wyndham Denver Gateway Park

Sep 27 - Oct 2

5 night stay

Calgary (YYC) to Denver (DEN)

WestJet • Roundtrip • Coach
Price was CA $882, price is now CA $733 per person
CA $733
per person
found 12 hours ago
Glenwood Springs Inn
2.0-star property

Glenwood Springs Inn

Sep 14 - Sep 19

5 night stay

Toronto (YYZ) to Denver (DEN)

Air Canada • Coach

Denver (DEN) to Toronto (YYZ)

American Airlines • Coach
Price was CA $1,662, price is now CA $1,133 per person
CA $1,133
per person
found 1 day ago
The Maven Hotel at Dairy Block
4.5-star property

The Maven Hotel at Dairy Block

Oct 31 - Nov 3

3 night stay

Calgary (YYC) to Denver (DEN)

United • Roundtrip • Coach
Price was CA $1,104, price is now CA $904 per person
CA $904
per person
found 21 hours ago
Don't see what you're looking for?
See all available trips from Calgary to Boulder County
View all trips

Travelers ❤️ These Boulder County 🏨

Hotel Boulderado

Hotel Boulderado

4 out of 5
2115 13th St Boulder CO
Book a stay at this luxury hotel in Boulder. Enjoy free WiFi, 2 restaurants, and breakfast (surcharge). Our guests praise the restaurant and the bar in our reviews. Popular attractions Pearl Street Mall and Folsom Field are located nearby.
9.6/10 Exceptional! (1,796 reviews)
"The room was lovely and kept at a comfortable temperature. It was perfect for me and my friend who went to see a show at Red Rocks Ampitheater. Highly recommend!"

Reviewed on Aug 25, 2026

Opens in a new windowHotel Boulderado
Limelight Boulder

Limelight Boulder

4 out of 5
1295 University Ave Boulder CO
Book a stay at this family-friendly hotel in Boulder. Enjoy free WiFi, 2 bars/lounges, and a rooftop terrace. Popular attractions Pearl Street Mall and Folsom Field are located nearby.
9.8/10 Exceptional! (356 reviews)
"We were there while attending a concert at Folsom Field on a Saturday night. Show ended at around 10:45pm. Everyone came back from the show and they closed the bar. Really bad planning on management's part and people were upset. It also put the bartenders in a really bad position. Everyone then went ..."

Reviewed on Aug 25, 2026

Opens in a new windowLimelight Boulder
A-Lodge Boulder

A-Lodge Boulder

3 out of 5
91 Four Mile Canyon Drive Boulder CO
Stay at this lodge in Boulder. Enjoy free WiFi, free parking, and an outdoor pool. Our guests praise the helpful staff and the clean rooms in our reviews. Popular attractions Pearl Street Mall and Folsom Field are located nearby.
9/10 Wonderful! (1,000 reviews)
"great place for outdoors enthusiasts."

Reviewed on Aug 23, 2026

Opens in a new windowA-Lodge Boulder
Save an average of 15% on thousands of hotels when you're signed in
Sign in
Sign up, it's free
Hotel Longmont

Hotel Longmont

3 out of 5
503 3rd Avenue Longmont CO
Stay at this hotel in Longmont. Enjoy free WiFi, breakfast (surcharge), and parking (surcharge). Popular attractions Wibby Brewing and City of Longmont Callahan House are located nearby.
Opens in a new windowHotel Longmont
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.

Frequently asked questions

How much is the cheapest flight to Boulder County?
Based on prices found over the last seven days on Travelocity, a roundtrip flight to Boulder County was as low as CA $203. If you can be flexible with your dates, it's easier to land a great bargain. This price was available on Travelocity for flights to Boulder County departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly to Boulder County?
For the greatest chance at scoring an excellent flight deal, time your escape in November. Based on Travelocity's direct flight demand from January to December last year, it's the cheapest time to jet to Boulder County.
How can I check my flight status to Boulder County?
Whether you'd like to view the status of your flight to Boulder County or amend your journey, you'll find all the important info on our customer portal, Trips. Click on "Trips" at the top of our homepage, then sign in or create a new account. Another convenient way to manage all your bookings is with the Travelocity app. Get alerts about flight delays or gate changes and easily share details with any family flying with you.
How do I find the best deals on flights to Boulder County?
Being flexible with your travel dates is one way to walk away with an incredible deal. Travelocity makes it super simple to find your perfect fare through the "Flexible dates" function. First, search for your flight to Boulder County, then compare the cheapest prices for nearby dates by hitting the "Flexible dates" box above. Booking ahead of schedule and avoiding peak periods are other suggestions. In the last seven days, the cheapest price for a return flight to Boulder County was CA $203. This price was available on Travelocity for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
Why should I book my flight to Boulder County with Travelocity?
If you're after cheap flights to Boulder County, you'll track down some enticing deals with Travelocity. From cheap family flights with low-cost air carriers to flexible tickets, we can help with your journey. Enjoy a hassle-free break with our 24/7 Virtual Agent online chat, Price Match Guarantee and free cancellations with most hotels. Start packing your case and get ready to fly away to this interesting destination.
What are the most popular flight routes to Boulder County?
Whether you have plans for a short break or a lengthy stay, Travelocity can help you find your flight to Boulder County. The busiest flight routes to this destination include:

  • Chicago, IL (ORD-O'Hare Intl.) to Denver Intl. Airport (DEN) - 4,138 flights a month.
  • Los Angeles, CA (LAX-Los Angeles Intl.) to Denver Intl. Airport (DEN) - 3,683 flights a month.
  • Salt Lake City, UT (SLC-Salt Lake City Intl.) to Denver Intl. Airport (DEN) - 3,549 flights a month.

How much is a flight to Boulder County on average?
Plane tickets for roundtrip flights to Boulder County cost between CA $203 and CA $1,237 in the last seven days. As soon as you find a fantastic deal, lock it in and get ready to take off on your next big adventure with Travelocity. These prices were available on Travelocity for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.