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

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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.

Tue, Oct 13 - Sat, Oct 17
DTW
Detroit Metropolitan Wayne County
DEN
Denver Intl.
CA $276 Roundtrip, found 10 hours ago
CA $276
Roundtrip
found 10 hours ago
Select Delta flight, departing Tue, Oct 13 from Detroit Metropolitan Wayne County to Denver Intl., returning Sat, Oct 17, priced at CA $276 found 10 hours ago
Tue, Oct 13 - Sat, Oct 17
DTW
Detroit Metropolitan Wayne County
DEN
Denver Intl.
CA $289 Roundtrip, found 10 hours ago
CA $289
Roundtrip
found 10 hours ago
Select Southwest Airlines flight, departing Tue, Oct 13 from Detroit Metropolitan Wayne County to Denver Intl., returning Sat, Oct 17, priced at CA $289 found 10 hours ago
Tue, Oct 13 - Sat, Oct 17
DTW
Detroit Metropolitan Wayne County
DEN
Denver Intl.
CA $303 Roundtrip, found 10 hours ago
CA $303
Roundtrip
found 10 hours ago
Select Southwest Airlines flight, departing Tue, Oct 13 from Detroit Metropolitan Wayne County to Denver Intl., returning Sat, Oct 17, priced at CA $303 found 10 hours ago
Sat, Oct 17 - Mon, Oct 19
DTW
Detroit Metropolitan Wayne County
DEN
Denver Intl.
CA $313 Roundtrip, found 1 day ago
CA $313
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Oct 17 from Detroit Metropolitan Wayne County to Denver Intl., returning Mon, Oct 19, priced at CA $313 found 1 day ago
Thu, Sep 17 - Tue, Oct 6
DTW
Detroit Metropolitan Wayne County
DEN
Denver Intl.
CA $319 Roundtrip, found 3 days ago
CA $319
Roundtrip
found 3 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 3 days ago
Thu, Sep 3 - Thu, Sep 10
YVR
Vancouver Intl.
DEN
Denver Intl.
CA $336 Roundtrip, found 22 hours ago
CA $336
Roundtrip
found 22 hours ago
Select WestJet flight, departing Thu, Sep 3 from Vancouver Intl. to Denver Intl., returning Thu, Sep 10, priced at CA $336 found 22 hours ago
Thu, Sep 3 - Sat, Sep 5
YYC
Calgary Intl.
DEN
Denver Intl.
CA $347 Roundtrip, found 1 hour ago
CA $347
Roundtrip
found 1 hour ago
Select WestJet flight, departing Thu, Sep 3 from Calgary Intl. to Denver Intl., returning Sat, Sep 5, priced at CA $347 found 1 hour ago
Thu, Sep 3 - Fri, Sep 11
YEG
Edmonton Intl.
DEN
Denver Intl.
CA $352 Roundtrip, found 2 hours ago
CA $352
Roundtrip
found 2 hours ago
Select WestJet flight, departing Thu, Sep 3 from Edmonton Intl. to Denver Intl., returning Fri, Sep 11, priced at CA $352 found 2 hours ago
OriginDestinationTravel datesFlights from*
MSPDenverNovember 6 to November 12CA $203
LAXDenverSeptember 10 to September 14CA $221
DFWDenverSeptember 16 to September 19CA $245
PHXDenverOctober 12 to October 15CA $262
BOSDenverDecember 3 to December 7CA $300
ORDDenverSeptember 14 to September 18CA $311
ATLDenverOctober 22 to October 24CA $368
JFKDenverSeptember 22 to September 29CA $395
PHLDenverOctober 28 to October 30CA $459
MIADenverOctober 15 to October 19CA $472
*Prices include taxes and fees
OriginDestinationTravel datesFlights from*
PHXDenverAugust 28 to September 1CA $471
LAXDenverAugust 29 to September 2CA $541
MIADenverAugust 28 to August 31CA $677
DFWDenverAugust 30 to August 31CA $692
PHLDenverAugust 30 to September 1CA $700
MSPDenverAugust 28 to September 1CA $711
JFKDenverAugust 28 to September 1CA $755
BOSDenverAugust 30 to September 3CA $767
ORDDenverAugust 28 to September 3CA $772
ATLDenverAugust 28 to August 30CA $1,237
*Prices include taxes and fees
Price found within the past 48 hours. Click for updated prices.
The Source Hotel
4.5-star property

The Source Hotel

Oct 15 - Oct 18

3 night stay

Calgary (YYC) to Denver (DEN)

United • Roundtrip • Coach
Price was CA $1,072, price is now CA $835 per person
CA $835
per person
found 20 hours ago
Glenwood Springs Inn
2.0-star property

Glenwood Springs Inn

Sep 14 - Sep 19

5 night stay

Toronto (YYZ) to Denver (DEN)

American Airlines • Non-stop roundtrip • Coach
Price was CA $1,652, price is now CA $1,123 per person
CA $1,123
per person
found 1 day ago
Hotel Boulderado
4.0-star property

Hotel Boulderado

Sep 5 - Sep 8

3 night stay

Toronto (YYZ) to Denver (DEN)

Air Canada • Roundtrip • Coach
Price was CA $1,584, price is now CA $1,251 per person
CA $1,251
per person
found 1 day 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! (352 reviews)
"Great Hotel! Service, rooms, food, everything was wonderful."

Reviewed on Aug 23, 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.
Opens in a new windowA-Lodge Boulder
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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.
10/10 Exceptional! (40 reviews)
"The hotel was beautiful, finishings and color palette in the room were rich, modern and elegant. Bed was cozy. Price was great."

Reviewed on Aug 21, 2026

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 October. 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.