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$39+ Cheap flights from Los Angeles (LAX) to Boulder, CO

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — DEN
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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The best prices from Los Angeles to Boulder are usually found in January or September, booked 52 days in advance, depart on a Saturday or Wednesday and return on a Friday

Cheap flight deals from Los Angeles to Boulder

Discover tips and strategies to find the most affordable flight options for your journey from Los Angeles (LAX) to Boulder (BD9). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.

Round-trip from

$68
(Cheapflightsfares)

One-way from

$39
(Cheapflightsfares)

Popular in

March

Cheapest in

January

Average price

$157
From Los Angeles to Boulder
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One-way flight from Los Angeles to Boulder
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Highest demand for flights based on searches. 12% potential increase in price ($26 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in January 2025
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Find flight deals from Los Angeles to Boulder

Cheapest flights from Los Angeles to Boulder
Explore the most affordable flight options available from Los Angeles to Boulder. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/186:30 amLAX - DEN
Nonstop2h 31mFrontier
Mon 2/2410:47 pmDEN - LAX
Nonstop2h 38mFrontier
Deal found 1/20$68
This Delta deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/108:00 amLAX - DEN
Nonstop2h 33mDelta
Tue 9/236:30 amDEN - LAX
Nonstop2h 29mDelta
Deal found 1/19$157
This Southwest deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/226:30 pmLAX - DEN
Nonstop2h 20mSouthwest
Mon 2/249:35 pmDEN - LAX
Nonstop2h 40mSouthwest
Deal found 1/20$167
This Alaska Airlines deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/101:40 pmLAX - DEN
1 stop7h 59mAlaska Airlines
Thu 9/187:00 amDEN - LAX
1 stop6h 29mAlaska Airlines
Deal found 1/19$216
This Booking.com deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/256:15 amLAX - DEN
Nonstop2h 33mMultiple Airlines
Mon 6/307:15 pmDEN - LAX
1 stop16h 23mMultiple Airlines
Deal found 1/19$218

Find flights from Los Angeles to Boulder within your budget

Customize your flight search to find flights from Los Angeles to Boulder that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

Los AngelesDenver

LAX - DEN

LAXDEN

Los Angeles

Thu 2/27

6:30 am-10:01 am

Nonstop2h 31m

Denver Intl

Sat 3/1

6:54 am-8:32 am

Nonstop2h 38m

$68

Los AngelesDenver

LAX - DEN

LAXDEN

Los Angeles

Sat 2/22

7:40 pm-11:00 pm

Nonstop2h 20m

Denver Intl

Mon 2/24

6:50 am-8:31 am

Nonstop2h 41m

$167

Los AngelesDenver

LAX - DEN

LAXDEN

Los Angeles

Sat 2/8

1:41 pm-9:20 pm

1 stop6h 39m

Denver Intl

Sun 2/16

3:31 pm-11:44 pm

1 stop9h 13m

$188

Los AngelesDenver

LAX - DEN

LAXDEN

Los Angeles

Fri 6/20

7:18 pm-10:47 pm

Nonstop2h 29m

Denver Intl

Sun 6/22

5:00 am-9:01 am

1 stop5h 01m

$207

Los AngelesDenver

LAX - DEN

LAXDEN

Los Angeles

Sat 2/22

9:00 am-12:28 pm

Nonstop2h 28m

Denver Intl

Mon 2/24

7:42 pm-9:44 pm

Nonstop3h 02m

$219

Los AngelesDenver

LAX - DEN

LAXDEN

Los Angeles

Wed 2/19

1:58 pm-11:29 pm

1 stop8h 31m

Denver Intl

Thu 2/20

2:50 pm-8:00 pm

1 stop6h 10m

$228

Los AngelesDenver

LAX - DEN

LAXDEN

Los Angeles

Wed 3/26

6:25 am-11:35 am

1 stop4h 10m

Denver Intl

Sat 3/29

6:00 pm-10:30 pm

1 stop5h 30m

$238

Los AngelesDenver

LAX - DEN

LAXDEN

Los Angeles

Mon 3/3

6:30 am-10:01 am

Nonstop2h 31m

$39

Los AngelesDenver

LAX - DEN

LAXDEN

Los Angeles

Sat 5/24

6:30 pm-10:00 pm

Nonstop2h 30m

$79

Los AngelesDenver

LAX - DEN

LAXDEN

Los Angeles

Wed 2/19

1:58 pm-11:29 pm

1 stop8h 31m

$88

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 16 results
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Best time to book a flight from Los Angeles to Boulder

Have a flexible travel schedule? Discover the best time to fly to Boulder from Los Angeles with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Los Angeles to Boulder

Get recent, data-driven insights about flights from Los Angeles to Boulder including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Los Angeles to Boulder?

Use this chart to determine the optimal time to book a round-trip flight from Los Angeles to Boulder. Price data was last updated on January 17, 2025.

The price you pay for your flight from Los Angeles to Boulder may vary depending on when you book. For the best chance of a lower fare, look to book 52 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Los Angeles to Boulder?

Currently, October is the cheapest month in which you can book a flight from Los Angeles to Boulder (average of $197). Flying from Los Angeles to Boulder in March is currently the most expensive (average of $278). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LAX to BD9?

Find hourly flight availability from Los Angeles to Boulder. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 21, 2025.

When flying from Los Angeles to Boulder, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What is the cheapest day to fly from Los Angeles to Boulder?

Use this chart to determine the cheapest time to fly round-trip from Los Angeles to Boulder. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Los Angeles to Boulder flight should consider departing on Saturday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Los Angeles to Boulder

Explore weekly flight availability from Los Angeles to Boulder. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated January 21, 2025.

The most flights from LAX to BD9 are scheduled on a Monday (92 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (63 on average).

Rainfall in Boulder by month

Plan your trip to Boulder by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Boulder ranges from 0.5 - 2.3 inches per month. May is typically the wettest month, when rainfall can reach 2.3 in. January is typically the driest time to visit Boulder when rainfall is around 0.5 in.

Temperature in Boulder by month

Plan your trip to Boulder by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Boulder, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Boulder

Get insights into the airlines that provide service to Boulder. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Boulder. Reviews last updated January 21, 2025.
See what other customers who have flown with Frontier, Delta and American Airlines from Los Angeles to Boulder have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Food

7.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Boarding

8.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Southwest
8.1
Very good
4,662 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Food

7.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Boarding

8.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Alaska Airlines
8.0
Very good
9,706 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Food

7.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Boarding

8.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Delta
8.0
Very good
8,521 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Food

7.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Boarding

8.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

JetBlue
7.4
Good
3,200 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Food

7.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Boarding

8.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

United Airlines
7.4
Good
8,984 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Food

7.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Boarding

8.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Related info for your journey

Find useful and relevant information for your journey from Los Angeles to Boulder. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Los Angeles to Boulder?

    Located just 9.4 mi from the city center, Los Angeles is the airport most travelers will use when flying to Boulder from Los Angeles. Booking flights from Los Angeles (LAX) to Boulder should be relatively easy as there are 82 daily outbound flights to Boulder from 6 different airlines.

  • How popular is this Los Angeles to Boulder flight route?

    The Los Angeles to Boulder flight path was viewed by 338 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • What are the cheapest airlines to fly from Los Angeles to Boulder one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $39. Users have also found prices from $79 and $88 on Delta and Alaska Airlines, respectively.

  • What are the most reliable airlines from Los Angeles to Boulder?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Los Angeles to Boulder on time: Air France (99%), Air China (97%), WestJet (94%).

  • What are the cheapest flights from Los Angeles to Boulder?

    While on average a flight from Los Angeles to Boulder is generally $753, our data shows the cheapest flight currently is $48. When looking at the most popular route, (Los Angeles - Denver Intl), you can expect to pay $48 for that flight.

  • Can I find deals for flights from Los Angeles to Boulder that include hotel bookings?

    Yes. In addition to deals on Los Angeles to Boulder flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Los Angeles to Boulder?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Los Angeles to Boulder.

  • Can I find deals for business class flights from Los Angeles to Boulder?

    Yes. Cheapflights offers flight deals from Los Angeles to Boulder by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Los Angeles to Boulder?

    Currently, October is the cheapest month in which you can book a flight from Los Angeles to Boulder (average of $197). Flying from Los Angeles to Boulder in March is currently the most expensive (average of $278). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 6 airlines flying from Los Angeles to Boulder

Discover the top 6 airlines that operate flights from Los Angeles to Boulder. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$55Average$141FlexibilityNo cancel feeOn-time62%
DeltaCheapest$118Average$242FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$145Average$275FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$157Average$388FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$158Average$311FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$164Average$443FlexibilityNo cancel feeOn-time75%
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