A rural landscape with autumn-colored trees, a dirt road, and snow-capped mountains in the background.

Cheap Flights to Boulder County

View NZ$364 flight on Wed, 25 Nov 2026Opens in a new window

Popular airlines to Boulder County

  • Frontier Airlines

  • Alaska Airlines

  • American Airlines

  • United

  • Delta

  • Southwest Airlines

  • JetBlue Airways

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Cheapest Flights to Boulder County

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Delta
Delta
Delta
American Airlines
American Airlines
Delta
United
Alaska Airlines
Air Tahiti Nui

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.

Air Tahiti Nui

Frequently asked questions

How do I find cheap flights to Boulder County that have flexible change policies?
Search for low-cost flights to Boulder County, then tick the "No change fee" box directly below the "Flexible change policies" heading. It really is that simple. We understand that travel plans change and flexibility matters, so book with confidence with Expedia.
Which airlines fly to Boulder County?
You can take your pick of a selection of airlines with flights into or near Boulder County. A few of your options are:
  • United Airlines - 13 033 flights to or near Boulder County each month, including 13 033 flights to Denver Intl. Airport (DEN) per month.
  • Southwest Airlines - 6 339 flights to or near Boulder County each month, including 6 339 flights to Denver Intl. Airport (DEN) per month.
  • Frontier Airlines - 1 967 flights to or near Boulder County each month, including 1 967 flights to Denver Intl. Airport (DEN) per month.
How can I find cheap tickets to Boulder County?
You'll always walk away with a terrific deal with Expedia, but our "flexible dates" search function makes it even easier. Enter your preferred travel date, then tick the flexible dates box above to see prices for nearby days. NZ$605 was the cheapest price for a flight to Boulder County in the last seven days.
How much is a flight to Boulder County?
There were plenty of bargain fares for the taking in the last seven days, with the price of a return flight to Boulder County varying between NZ$605 and NZ$2,090. Many lucky holiday makers purchased one-way flights from Washington (DCA) for as little as NZ$364.
What are the most popular airports to fly into in Boulder County?
Fly into Denver Intl. Airport (DEN) and experience all that Boulder County has to offer. As the region's primary entry point, approximately 24 249 flights touch down here each month.
When is the cheapest time to fly to Boulder County?
Leave early in the week to secure a bargain airfare to Boulder County. Tuesday is generally the most economical day to take off, followed by Monday. Saturday typically has the costliest prices. This is because lots of people prefer to begin their trip on a weekend.
How much is a plane ticket to Boulder County?
In the last seven days, tickets to Boulder County ranged between NZ$605 and NZ$2,090. The early bird catches the worm, so land yourself an awesome deal today.
What months are the cheapest to book a flight to Boulder County?
February is a cheap month to purchase a seat for your Boulder County getaway. Airfares cost the most during December, so steer clear of this time if possible.

Book with confidence

Boulder County Flights

There is no better time to steal away to Boulder County than right now, and Expedia.co.nz knows just how to get you there without breaking your budget. You can find cheap flights to Boulder County right here on Expedia.co.nz, and comparing itineraries couldn't be easier. Whether you are early bird flyer or want to catch Boulder County flights on the red-eye schedule, Expedia.co.nz can show you all the available flights at the best price. From domestic flights to international journeys, the flight you need can be found and booked right here with us.

Once you have your cheap tickets to Boulder County in hand, holiday planning can move forward full steam ahead. Unleash the potential of your holiday with a car rental, which makes it possible to explore Boulder County without relying on public transportation or trekking far and wide on foot.

If you're in the market for adventure, book one of the Expedia holiday packages. Our packages save you money and time by bundling hotels and flights. What are you waiting for? Your next holiday in Boulder County starts right here!

Boulder County Flights

Travel information

Boulder County Flights Information

Airlines serving
American Airlines, Delta, Alaska Airlines, United, Air Tahiti Nui
Roundtrip price
from NZ$605
Boulder County Flights Information
*Available to Expedia members.