CA $188 Cheap Flight to Boulder County

View CA $188 flight on Sun, May 31, 2026Opens in a new window

Popular airlines to Boulder County

  • Frontier Airlines

  • Alaska Airlines

  • American Airlines

  • Delta

  • United

  • Southwest Airlines

  • JetBlue Airways

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How much is the cheapest flight to Boulder County?

Prices were available within the past 7 days and start at CA $188 for one-way flights and CA $306 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Sat, May 30 - Sun, May 31
YYC
Calgary
DEN
Denver
CA $306 Roundtrip, found 1 hour ago
CA $306
Roundtrip
found 1 hour ago
Select Air Canada flight, departing Sat, May 30 from Calgary to Denver, returning Sun, May 31, priced at CA $306 found 1 hour ago
United
Sat, May 30 - Sun, May 31
YYC
Calgary
DEN
Denver
CA $306 Roundtrip, found 1 hour ago
CA $306
Roundtrip
found 1 hour ago
Select United flight, departing Sat, May 30 from Calgary to Denver, returning Sun, May 31, priced at CA $306 found 1 hour ago
Delta
Sat, May 30 - Thu, Jun 4
YYC
Calgary
DEN
Denver
CA $341 Roundtrip, found 1 hour ago
CA $341
Roundtrip
found 1 hour ago
Select Delta flight, departing Sat, May 30 from Calgary to Denver, returning Thu, Jun 4, priced at CA $341 found 1 hour ago
WestJet
Mon, Jun 15 - Wed, Jun 24
YYC
Calgary
DEN
Denver
CA $344 Roundtrip, found 1 day ago
CA $344
Roundtrip
found 1 day ago
Select WestJet flight, departing Mon, Jun 15 from Calgary to Denver, returning Wed, Jun 24, priced at CA $344 found 1 day ago
United
Wed, May 20 - Mon, May 25
YYC
Calgary
DEN
Denver
CA $345 Roundtrip, just found
CA $345
Roundtrip
just found
Select United flight, departing Wed, May 20 from Calgary to Denver, returning Mon, May 25, priced at CA $345 just found
WestJet
Tue, Jun 23 - Wed, Jun 24
YYC
Calgary
DEN
Denver
CA $346 Roundtrip, found 1 day ago
CA $346
Roundtrip
found 1 day ago
Select WestJet flight, departing Tue, Jun 23 from Calgary to Denver, returning Wed, Jun 24, priced at CA $346 found 1 day ago
Delta
Sun, May 24 - Wed, May 27
YYC
Calgary
DEN
Denver
CA $347 Roundtrip, found 1 day ago
CA $347
Roundtrip
found 1 day ago
Select Delta flight, departing Sun, May 24 from Calgary to Denver, returning Wed, May 27, priced at CA $347 found 1 day ago
United
Sat, May 30 - Thu, Jun 4
YYC
Calgary
DEN
Denver
CA $349 Roundtrip, found 1 hour ago
CA $349
Roundtrip
found 1 hour ago
Select United flight, departing Sat, May 30 from Calgary to Denver, returning Thu, Jun 4, priced at CA $349 found 1 hour ago
WestJet
Sat, Jun 20 - Wed, Jun 24
YYC
Calgary
DEN
Denver
CA $350 Roundtrip, found 5 hours ago
CA $350
Roundtrip
found 5 hours ago
Select WestJet flight, departing Sat, Jun 20 from Calgary to Denver, returning Wed, Jun 24, priced at CA $350 found 5 hours ago
American Airlines
Mon, Jun 1 - Tue, Jun 9
YYZ
Toronto
DEN
Denver
CA $556 Roundtrip, found 23 hours ago
CA $556
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Mon, Jun 1 from Toronto to Denver, returning Tue, Jun 9, priced at CA $556 found 23 hours ago

Trending flights to Boulder County

These prices were available within the past 7 days. Prices quoted are per person, return, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, May 30 - Sun, May 31
YYC
Calgary
DEN
Denver
CA $306 Roundtrip, found 1 hour ago
CA $306
Roundtrip
found 1 hour ago
Select United flight, departing Sat, May 30 from Calgary to Denver, returning Sun, May 31, priced at CA $306 found 1 hour ago

Frequently asked questions

How do I find cheap flights to Boulder County that have flexible change policies?
We know that travel arrangements can change in the blink of an eye, so choosing a flexible fare with Expedia is always a wise idea. Just check the "No change fee" box under the "Flexible change policies" filter. Your low-cost, flexible flight to Boulder County is just a few clicks away.
Which airlines fly to Boulder County?
With a great selection of airlines flying into or near Boulder County, you have plenty of choice:

  • United Airlines - 13,845 flights to or near Boulder County each month, including 13,845 flights to Denver Intl. Airport (DEN) per month.
  • Southwest Airlines - 6,699 flights to or near Boulder County each month, including 6,699 flights to Denver Intl. Airport (DEN) per month.
  • Frontier Airlines - 1,547 flights to or near Boulder County each month, including 1,547 flights to Denver Intl. Airport (DEN) per month.

How can I find cheap tickets to Boulder County?
In the last seven days, CA $306 was the best price for a flight to Boulder County. For an even better fare, book in advance and be flexible with your dates. Search for your trip to Boulder County, then see prices for similar time frames by clicking on the "flexible dates" link above.
How much is a flight to Boulder County?
The cost of a round-trip ticket to Boulder County in the last seven days varied between CA $306 and CA $556. If you were flying one way from Calgary (YYC), you could have purchased a great deal from only CA $188.
What are the most popular airports to fly into in Boulder County?
Jet into Denver Intl. Airport (DEN) and enjoy everything that Boulder County has to offer. As the region's main entry point, approximately 24,420 flights land here each month.
When is the cheapest time to fly to Boulder County?
Departing on a Tuesday, followed by a Monday, is usually the best way to pick up the cheapest airfare. Stay away from the weekends if possible, because Saturday is typically the costliest day. Spend the funds you saved having a good time in Boulder County instead!
How much is a plane ticket to Boulder County?
In the last seven days, tickets to Boulder County fluctuated from CA $306 to CA $556.
What months are the cheapest to book a flight to Boulder County?
To grab a low-cost flight to Boulder County, book during February when the prices are at their cheapest. When do tickets cost the most? In the United States, it's the festive month of December.

Travel information

Boulder County Flights Information

Airlines serving
WestJet, Air Canada, Delta, United, Alaska Airlines, American Airlines
Roundtrip price
from CA $306
Boulder County Flights Information

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