$20 Cheap flights to Boulder County

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Top places to visit in Boulder County

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

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

Longmont
A historic stone building with a reflection in calm water, surrounded by a fence and trees.
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FlightsFlights

Louisville

Louisville

Cheap flights to Boulder County from $20 One Way, $41 Round Trip

$41 return flights and $20 one-way flights to Boulder County were the cheapest prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Dec 2 - Sat, Dec 12
DFW
Dallas
DEN
Denver
$41 Roundtrip, found 2 hours ago
$41
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Wed, Dec 2 from Dallas to Denver, returning Sat, Dec 12, priced at $41 found 2 hours ago
Tue, Dec 8 - Tue, Dec 15
LAX
Los Angeles
DEN
Denver
$58 Roundtrip, found 11 hours ago
$58
Roundtrip
found 11 hours ago
Select Frontier Airlines flight, departing Tue, Dec 8 from Los Angeles to Denver, returning Tue, Dec 15, priced at $58 found 11 hours ago
Thu, Dec 3 - Tue, Dec 8
ORD
Chicago
DEN
Denver
$74 Roundtrip, just found
$74
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Dec 3 from Chicago to Denver, returning Tue, Dec 8, priced at $74 just found
Wed, Dec 9 - Sat, Dec 12
IAH
Houston
DEN
Denver
$104 Roundtrip, found 2 hours ago
$104
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Wed, Dec 9 from Houston to Denver, returning Sat, Dec 12, priced at $104 found 2 hours ago
Mon, Dec 21 - Thu, Dec 24
DAL
Dallas
DEN
Denver
$131 Roundtrip, found 10 hours ago
$131
Roundtrip
found 10 hours ago
Select Southwest Airlines flight, departing Mon, Dec 21 from Dallas to Denver, returning Thu, Dec 24, priced at $131 found 10 hours ago
Sat, Dec 12 - Sat, Dec 19
DFW
Dallas
DEN
Denver
$137 Roundtrip, found 1 hour ago
$137
Roundtrip
found 1 hour ago
Select United flight, departing Sat, Dec 12 from Dallas to Denver, returning Sat, Dec 19, priced at $137 found 1 hour ago

Deals For This Weekend's Flights

OriginDestinationTravel DatesFlights From*
LAXDenverOctober 24 to November 3$262
MIADenverOctober 24 to October 24$270
PHXDenverOctober 25 to October 28$287
DFWDenverOctober 25 to October 28$292
ORDDenverOctober 24 to October 31$332
TTNDenverOctober 24 to October 31$369
MSPDenverOctober 25 to October 26$425
EWRDenverOctober 24 to October 27$440
ATLDenverOctober 24 to October 28$452
BOSDenverOctober 24 to October 27$545
*Prices include taxes and fees

Find The Perfect Hotel For After Your Flight

Score Epic Boulder County Accommodation Deals

Hotel Boulderado

Hotel Boulderado

4 out of 5
2115 13th St Boulder CO
Fully refundableReserve now, pay when you stay
$146 nightly
The price is $168 total per night from Nov 20 to Nov 21
$168 total
Nov 20 - Nov 21
Total with taxes and fees
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. ...
9.6/10 Exceptional! (1,831 reviews)
"This is an historic hotel. So the decor matches it accordingly. That doesn’t mean it’s old and tired. It means it fits the setting. Most important to me is cleanliness. My room was clean and well cared for. The bed was super comfortable. I had a great nights sleep."

Reviewed on Oct 19, 2026

Opens in a new windowHotel Boulderado
Limelight Boulder

Limelight Boulder

4 out of 5
1295 University Ave Boulder CO
$239 nightly
The price is $274 total per night from Nov 11 to Nov 12
$274 total
Nov 11 - Nov 12
Total with taxes and fees
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 ...
Opens in a new windowLimelight Boulder
Comfort Inn & Suites Boulder

Comfort Inn & Suites Boulder

3 out of 5
4777 North Broadway Boulder CO
Fully refundable
$110 nightly
The price is $126 total per night from Nov 9 to Nov 10
$126 total
Nov 9 - Nov 10
Total with taxes and fees
Book a stay at this business-friendly hotel in Boulder. Enjoy free breakfast, free WiFi, and an outdoor pool. Our guests praise the breakfast and the helpful ...
Opens in a new windowComfort Inn & Suites Boulder
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Courtyard by Marriott Boulder Broomfield

Courtyard by Marriott Boulder Broomfield

3 out of 5
948 West Dillon Road Louisville CO
Fully refundableReserve now, pay when you stay
$95 nightly
The price is $107 total per night from Nov 2 to Nov 3
$107 total
Nov 2 - Nov 3
Total with taxes and fees
Book a stay at this business-friendly hotel in Louisville. Enjoy free WiFi, free parking, and breakfast (surcharge). Our guests praise the helpful staff and ...
Opens in a new windowCourtyard by Marriott Boulder Broomfield
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.

Need a Car For After Your Flight?

Special

Choice of Supplier
  • 5 people
  • Unlimited mileage
COMMERCE CITY, USA
Choice of Supplier

$8

$86 total
found 3 days ago
Special Choice of Supplier

Midsize

Toyato Corolla
  • 5 people
  • Unlimited mileage
COMMERCE CITY, USA
Toyato Corolla

$9

$88 total
found 3 days ago
Midsize Toyato Corolla

Economy SUV

Nissan Juke
  • 5 people
  • Unlimited mileage
Aurora, Colorado, USA
Nissan Juke

$12

$71 total
found 3 days ago
Economy SUV Nissan Juke

Standard

Volkswagen Passat
  • 5 people
  • Unlimited mileage
Aurora, Colorado, USA
Volkswagen Passat

$12

$71 total
found 3 days ago
Standard Volkswagen Passat
Lowest prices found within the past 3 days. Prices and availability subject to change. Additional terms may apply.

Boulder County

Traveling to Boulder County and need a cheap flight? Orbitz has great deals on flights to Boulder County right now. Plus, we offer big discounts on hotel rooms and car rentals for a great money-saving trip.

Find Low Cost Flights to Boulder County Quickly and Hassle-Free

There are many Internet sites that promise cheap Boulder County flights, but a busy, bargain-minded trip planner needs more than just budget air tickets. Not only does Orbitz offer the best deals for domestic and international air fare, but we also provide the resources and tools to help you plan your flights to Boulder County, book your lodging, and look up key attractions in Boulder County. Our easy search tools and guaranteed low prices let you budget your time and your money so you have more of both to spend on your vacation.

New Apps Make Booking Boulder County Flights Easier Than Ever

You no longer need to be sitting at your computer to find amazing Orbitz sales for flights to Boulder County now we offer cutting-edge mobile tools for many Android and iOS gadgets. These free apps allow you to run a search for discount air fare, look for special vacation packages, or check on your booked Boulder County flights from any location. Some special deals are only available for mobile customers, so be sure to take advantage of these free downloads today.

Orbitz Customers Are Truly #1

Orbitz takes pride in providing the best customer experience possible, and that effort doesn't end with discount flights to Boulder County or user-friendly mobile apps and web tools. Orbitz Customer Service is always ready to answer questions and help you with booking, planning, or canceling your Boulder County flights. When you need us, we’re here for you!

Frequently asked questions

Which airlines fly to Boulder County?
With 12 airlines waiting to spirit you away to Boulder County, finding a suitable flight will be a breeze. Book your fare with one of these top carriers that offer services to Denver Intl. Airport (DEN):

  • United Airlines - 269 flights to Boulder County per month
  • Southwest Airlines - 88 flights to Boulder County per month
  • Air Canada - 83 flights to Boulder County per month

How much is a flight to Boulder County?
If you're searching for flights back and forth, airfares ranged between $41 and $545 this past week. The lowest one-way ticket prices were $20, departing from Dallas (DFW).
How to book the cheapest flight to Boulder County?
With Orbitz, you'll find some of the most amazing flight deals around from a big range of airlines. But if you'd like to increase your chances of landing cheap flights to Boulder County, here are some suggestions we think will help:

  • Taking off from or arriving at other airports can sometimes be cheaper. Enter your preferred departure and arrival airports. Next, select the 'Nearby airports' function below to explore your options.
  • Also, click on the 'Show flexible dates' link to bring up the prices for days around your chosen departure. It's possible to score cheaper flight deals if you're flexible with your schedule.
  • To filter your results, hit 'Show options.' You can search based on airlines, seating class, nonstop flights and refundable flights. You can also choose your preferred flight times under 'Sort & Filter' to the left.
  • The early bird catches the best deals, so purchase your seats once you've settled on your travel dates. The most affordable airfares sell like hotcakes and prices normally climb as the departure date nears.
  • Bundle your flights, hotels and car rental into an impressive package deal. Save your money for things that really excite you, like discovering every corner of Boulder County.
  • Don't travel during peak seasons if possible. By avoiding summer and school vacations, you can make superb savings on your airfares.

What is the best time to book a flight to Boulder County?
Book your flights to Boulder County in January. This is the perfect time of the year for low prices, followed by February and August. Find cheap flights and make your dream journey a reality with Orbitz.
What day of the week is the cheapest to book a flight to Boulder County?
Get a great flight deal by booking on a Tuesday, Wednesday or Saturday. Typically, these are the best days to pick up cheap fares to Boulder County.
What is the cheapest day of the week to fly to Boulder County?
You can land cheap flights to Boulder County by flying out on a Monday, according to Orbitz data from 2020. Tuesday is also more affordable, while Saturday has the most expensive ticket prices. Whether you prefer to save cash or take off on any day that's convenient, you'll always find a terrific deal with Orbitz.
What is the cheapest month to fly to Boulder County?
To score cheap flights to Boulder County, you should depart in August. If getting a great deal on your ticket is your number one priority, Orbitz data has found that this is generally an excellent month to travel. June is when airfares are the most expensive.
Which airlines allow free cancellation?
Plans change, and your ticket should be able to do the same. That's why Orbitz makes it a cinch to search for flights with no change fees and free cancellation. Just enter your departure and arrival destinations and then select "Filter by flexible change policies." How's that for fuss-free?
What do I need for the flight to Boulder County?
Nothing's more fun than flying somewhere new, but it pays to be prepared. These top tips will help get your trip off to a smooth start:

  • Before you step foot on the plane, you'll need to show some form of government-issued ID, like a passport. You'll also need your boarding pass. If you're traveling with children, check with your airline about which documents they may need.
  • To keep you entertained on the short trip to Boulder County, download some new music or restock the audiobook library on your phone. Food can also be a good distraction while in the air, so maybe even bring some snacks.
  • It can get cool on the plane. If you'd prefer not to shiver your way through the flight, wear an extra layer of clothes.

How do I get cheap first-class/business deals to Boulder County?
There are ways of booking first or business-class fares to Boulder County that won't burn through your wallet. Pick up a seat at the front of the plane for less with these great tips:

  • Be flexible with your travel dates and hold out for huge sales on first or business-class airfares.
  • Many low-cost carriers nowadays have terrific business-class seating for a wallet-friendly price.
  • Bid for an upgrade in online auctions (if available) or upgrade your seat with points earned through loyalty programs.

Fare, taxes & fees: Fares include all taxes and fees, except baggage fees. Rates shown reflect fares found by other Orbitz users over the past 7 days. Due to rapidly changing airline prices & seat availability, these fares may no longer be available.

Refunds/changes/cancellations: Itinerary changes, if permitted for the fare, will have a $30 service fee charged by Orbitz. Additional airline charges may apply.

Other conditions: Schedules, fares and rules are subject to change without notice. Seats are limited and may not be available on all flights/dates or in all markets. Lower fares may be available. Fares will not be honored retroactively or in exchange for any wholly/partially unused ticket. Tickets are non-transferable and non-refundable. Fare rules are provided for the selected itinerary before booking.