$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.
FlightsFlights
FlightsFlights

Louisville

Louisville

Cheap flights to Boulder County from $20 One Way, $40 Round Trip

$40 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.

Sat, Feb 27 - Tue, Mar 2
DFW
Dallas
DEN
Denver
$40 Roundtrip, found 1 day ago
$40
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, Feb 27 from Dallas to Denver, returning Tue, Mar 2, priced at $40 found 1 day ago
Sat, Dec 5 - Sat, Dec 12
LAX
Los Angeles
DEN
Denver
$42 Roundtrip, found 6 hours ago
$42
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Sat, Dec 5 from Los Angeles to Denver, returning Sat, Dec 12, priced at $42 found 6 hours ago
Wed, Dec 2 - Sun, Dec 6
ORD
Chicago
DEN
Denver
$63 Roundtrip, found 1 day ago
$63
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Dec 2 from Chicago to Denver, returning Sun, Dec 6, priced at $63 found 1 day ago
Wed, Nov 11 - Mon, Nov 16
IAH
Houston
DEN
Denver
$69 Roundtrip, found 1 day ago
$69
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Nov 11 from Houston to Denver, returning Mon, Nov 16, priced at $69 found 1 day ago
Sat, Jan 23 - Tue, Jan 26
MSP
Minneapolis
DEN
Denver
$73 Roundtrip, found 4 days ago
$73
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Sat, Jan 23 from Minneapolis to Denver, returning Tue, Jan 26, priced at $73 found 4 days ago
Sat, Feb 27 - Mon, Mar 1
DAL
Dallas
DEN
Denver
$131 Roundtrip, found 2 days ago
$131
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Sat, Feb 27 from Dallas to Denver, returning Mon, Mar 1, priced at $131 found 2 days ago
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Deals For This Weekend's Flights

OriginDestinationTravel DatesFlights From*
PHXDenverNovember 8 to November 20$189
ATLDenverNovember 7 to January 30$199
MSPDenverNovember 7 to November 10$213
LAXDenverNovember 7 to November 9$220
MIADenverNovember 6 to November 11$282
DALDenverNovember 8 to November 9$284
ORDDenverNovember 7 to November 15$300
TTNDenverNovember 8 to November 12$344
LGADenverNovember 7 to November 13$357
BOSDenverNovember 7 to November 17$378
*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
$120 nightly
The price is $138 total per night from Nov 29 to Nov 30
$138 total
Nov 29 - Nov 30
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! (1,844 reviews)
"A lot went wrong but i did get reimbursed for a night (without an apology or acknowledgement). Location is great, food is good, however I would not stay again due to my experience and they have a lot of big events there (wedding, corporate etc)"

Reviewed on Oct 30, 2026

Opens in a new windowHotel Boulderado
Limelight Boulder

Limelight Boulder

4 out of 5
1295 University Ave Boulder CO
Fully refundableReserve now, pay when you stay
$229 nightly
The price is $263 total per night from Nov 22 to Nov 23
$263 total
Nov 22 - Nov 23
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 ...
9.8/10 Exceptional! (426 reviews)
"Staff was amazing and very helpful with room swap."

Reviewed on Oct 30, 2026

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
$95 nightly
The price is $109 total per night from Nov 22 to Nov 23
$109 total
Nov 22 - Nov 23
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 8 to Nov 9
$107 total
Nov 8 - Nov 9
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 ...
8.8/10 Excellent! (1,000 reviews)
"Very nice hotel. Love the courtyard and fire feature, lobby was very nice. Staff were efficient, rooms serviced every other day. Our room was very nice. Disappointments, no hot tub or sauna, they wouldn't make/sell Starbucks coffee unless it was in the morning for breakfast. They have the equipment, ..."

Reviewed on Oct 25, 2026

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 SUV

Jeep Wrangler
  • 5 people
  • Unlimited mileage
COMMERCE CITY, USA
Jeep Wrangler

$7

$82 total
found 1 day ago
Special SUV Jeep Wrangler

Midsize SUV

Nissan Rogue
  • 5 people
  • Unlimited mileage
COMMERCE CITY, USA
Nissan Rogue

$7

$82 total
found 1 day ago
Midsize SUV Nissan Rogue

Compact

Hyundai Accent
  • 5 people
  • Unlimited mileage
Aurora, Colorado, USA
Hyundai Accent

$11

$68 total
found 1 day ago
Compact Hyundai Accent

Standard

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

$11

$69 total
found 1 day ago
Standard Volkswagen Passat

Boulder County

Struggling to find international and domestic flights that suit your budget. Consider one of the cheaper options available when you book your flight with Orbitz, where you get guaranteed low prices

Orbitz becomes your Mobile friend

You can now book flights to Boulder County on the new cutting-edge mobile tool for Android or iPhone users. Hotel packages, flight updates and changes can all be accessed using this tool. When you make any reservations or bookings using this service, confirmation will be provided on the same day the request was made. Take advantage of Orbitz friendly service and low cost Boulder County flights.

Discounted tickets available for flights to Boulder County

Orbitz offers tickets at a discounted, budget friendly rate that will satisfy all of your travel requirements. Book your Boulder County flights with us and structure a package that includes car hire, family activities and cheap accommodation. Orbitz will ensure that all your requirements are met, letting you relax and enjoy your holiday as it was intended.

Orbitz offers discounted Boulder County flights

Discounted flights to Boulder County ensure that all who want to travel can Take advantage of Orbitz’ guaranteed low prices and affordable packages. You will enjoy a hassle free trip, an up to date travel planner and friendly service.

Traveler profile updates

When flying with Orbitz, take advantage of frequent updates on your flights to Boulder County. Details and updates are sent to up to six contact numbers to ensure that you are kept abreast of the latest information on Boulder County flights. Frequent flyer and loyalty membership numbers may be updated within your Orbitz account profile.

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 $40 and $378 this past week. The lowest one-way ticket prices were $20, departing from Los Angeles (LAX).
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.