Flights To Boulder County - Cheap Flights Starting at CA $139

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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.

Thu, Sep 17 - Tue, Oct 6
DTW
Detroit Metropolitan Wayne County
DEN
Denver Intl.
CA $319 Roundtrip, found 1 day ago
CA $319
Roundtrip
found 1 day 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 1 day ago
Tue, Sep 1 - Thu, Sep 3
YVR
Vancouver Intl.
DEN
Denver Intl.
CA $326 Roundtrip, found 2 hours ago
CA $326
Roundtrip
found 2 hours ago
Select WestJet flight, departing Tue, Sep 1 from Vancouver Intl. to Denver Intl., returning Thu, Sep 3, priced at CA $326 found 2 hours ago
Fri, Oct 9 - Tue, Oct 13
DTW
Detroit Metropolitan Wayne County
DEN
Denver Intl.
CA $327 Roundtrip, found 7 hours ago
CA $327
Roundtrip
found 7 hours ago
Select Delta flight, departing Fri, Oct 9 from Detroit Metropolitan Wayne County to Denver Intl., returning Tue, Oct 13, priced at CA $327 found 7 hours ago
Fri, Oct 9 - Tue, Oct 13
DTW
Detroit Metropolitan Wayne County
DEN
Denver Intl.
CA $327 Roundtrip, found 7 hours ago
CA $327
Roundtrip
found 7 hours ago
Select Delta flight, departing Fri, Oct 9 from Detroit Metropolitan Wayne County to Denver Intl., returning Tue, Oct 13, priced at CA $327 found 7 hours ago
Tue, Sep 1 - Thu, Sep 10
YVR
Vancouver Intl.
DEN
Denver Intl.
CA $337 Roundtrip, found 6 hours ago
CA $337
Roundtrip
found 6 hours ago
Select WestJet flight, departing Tue, Sep 1 from Vancouver Intl. to Denver Intl., returning Thu, Sep 10, priced at CA $337 found 6 hours ago
Thu, Sep 3 - Thu, Sep 10
YEG
Edmonton Intl.
DEN
Denver Intl.
CA $352 Roundtrip, found 6 hours ago
CA $352
Roundtrip
found 6 hours ago
Select WestJet flight, departing Thu, Sep 3 from Edmonton Intl. to Denver Intl., returning Thu, Sep 10, priced at CA $352 found 6 hours ago
Tue, Sep 1 - Thu, Oct 1
YYC
Calgary Intl.
DEN
Denver Intl.
CA $358 Roundtrip, found 1 day ago
CA $358
Roundtrip
found 1 day ago
Select WestJet flight, departing Tue, Sep 1 from Calgary Intl. to Denver Intl., returning Thu, Oct 1, priced at CA $358 found 1 day ago
Thu, Sep 17 - Tue, Oct 6
DTW
Detroit Metropolitan Wayne County
DEN
Denver Intl.
CA $361 Roundtrip, found 1 day ago
CA $361
Roundtrip
found 1 day 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 1 day ago
OriginDestinationTravel datesFlights from*
MSPDenverNovember 2 to November 5CA $203
LAXDenverSeptember 10 to September 14CA $221
DFWDenverSeptember 16 to September 19CA $245
PHXDenverOctober 12 to October 15CA $262
BOSDenverOctober 29 to November 4CA $301
ATLDenverOctober 22 to October 24CA $368
ORDDenverSeptember 9 to September 12CA $383
JFKDenverOctober 24 to October 31CA $398
PHLDenverOctober 28 to October 30CA $461
MIADenverOctober 15 to October 19CA $472
*Prices include taxes and fees
OriginDestinationTravel datesFlights from*
MSPDenverAugust 28 to September 1CA $472
PHXDenverAugust 29 to September 3CA $473
LAXDenverAugust 29 to September 2CA $544
MIADenverAugust 28 to August 31CA $677
DFWDenverAugust 30 to August 31CA $692
PHLDenverAugust 30 to September 1CA $704
JFKDenverAugust 28 to September 1CA $755
BOSDenverAugust 30 to September 3CA $767
ORDDenverAugust 28 to September 3CA $775
ATLDenverAugust 28 to August 30CA $1,237
*Prices include taxes and fees
Price found within the past 48 hours. Click for updated prices.
Catbird Hotel
4.0-star property

Catbird Hotel

Oct 1 - Oct 7

6 night stay

Toronto (YYZ) to Denver (DEN)

United • Roundtrip • Coach
Price was CA $1,774, price is now CA $1,374 per person
CA $1,374
per person
found 23 hours ago
Hotel Jerome, Auberge Collection
5.0-star property

Hotel Jerome, Auberge Collection

Sep 30 - Oct 6

6 night stay

Toronto (YYZ) to Denver (DEN)

Air Canada • Coach

Denver (DEN) to Toronto (YYZ)

Delta • Coach
Price was CA $9,165, price is now CA $6,722 per person
CA $6,722
per person
found 1 day ago
Hotel Teatro
4.5-star property

Hotel Teatro

Oct 1 - Oct 7

6 night stay

Toronto (YYZ) to Denver (DEN)

United • Roundtrip • Coach
Price was CA $2,121, price is now CA $1,617 per person
CA $1,617
per person
found 23 hours ago
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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.
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! (349 reviews)
"We had a wonderful day at this hotel. It was beautiful and clean. The staff was very friendly and the amenities are fabulous. We will definitely be back again."

Reviewed on Aug 21, 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! (1,005 reviews)
"Nestled next to a creek in the woods of 4 mile Canyon,, this lodge has a cool vibe. You can rent a room or a campsite or a car parking spot. We opted for the room and found it to be clean and comfortable. In the reception area, you can purchase beer on tap as well as snacks. We’ll be back."

Reviewed on Aug 21, 2026

Opens in a new windowA-Lodge Boulder
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Moxy Boulder University

Moxy Boulder University

4 out of 5
1247 Pleasant Street Boulder CO
Stay at this hotel in Boulder. Enjoy free WiFi, a rooftop terrace, and breakfast (surcharge). Popular attractions Folsom Field and Pearl Street Mall are located nearby.
9.2/10 Wonderful! (448 reviews)
"This hotel has a beautiful lobby but is a disorganized mess. I paid for the hotel three months in advance; but was double billed; charges were placed on my card repeatedly that had no connection to my stay. Valet parking was a mess. The rates charged are premium rates, but the experience was anything ..."

Reviewed on Aug 21, 2026

Opens in a new windowMoxy Boulder University
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 September. 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.