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$34+ 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 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — DEN
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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The best prices from Los Angeles to Boulder are usually found in January or September, booked 60 days in advance, depart on a Saturday or Wednesday and return on a Friday

Cheap flight deals from Los Angeles to Boulder

Keep the following information in mind while searching for Los Angeles to Boulder flight deals. Data was last updated February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$58
(Cheapflightsfares)

One-way from

$34
(Agoda.com)

Popular in

March

Cheapest in

January

Average price

$197
Provider with most accurate pricing for Los Angeles-Denver Intl flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Denver Intl flights.
Search Deals
From Los Angeles to Boulder
Search Deals
One-way flight from Los Angeles to Boulder
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 February 20, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 2/19. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/112:35 pmLAX - DEN
Nonstop2h 31mFrontier
Thu 3/1310:47 pmDEN - LAX
Nonstop2h 38mFrontier
Deal found 2/19$58
This Expedia deal was found by Cheapflights users on 2/19. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1110:40 amLAX - DEN
Nonstop2h 31mMultiple Airlines
Wed 3/122:50 pmDEN - LAX
1 stop6h 10mMultiple Airlines
Deal found 2/19$132
This Hawaiian Airlines deal was found by Cheapflights users on 2/19. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/213:43 pmLAX - DEN
1 stop8h 27mHawaiian Airlines
Thu 4/246:37 pmDEN - LAX
1 stop6h 22mHawaiian Airlines
Deal found 2/19$211
This Southwest deal was found by Cheapflights users on 2/20. 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.
Mon 3/104:15 pmLAX - DEN
Nonstop2h 20mSouthwest
Wed 3/123:10 pmDEN - LAX
2 stops6h 05mSouthwest
Deal found 2/20$212
This Alaska Airlines deal was found by Cheapflights users on 2/19. 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 3/1211:59 amLAX - DEN
1 stop8h 21mAlaska Airlines
Tue 3/187:00 amDEN - LAX
1 stop6h 58mAlaska Airlines
Deal found 2/19$216
This American Airlines deal was found by Cheapflights users on 2/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/53:16 pmLAX - DEN
1 stop5h 30mAmerican Airlines
Sat 7/126:30 amDEN - LAX
Nonstop2h 31mAmerican Airlines
Deal found 2/20$227

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 February 20, 2025.

Fly from

Los Angeles

Fly to

Boulder

Route

Depart

Return

Price

Los AngelesDenver

LAX - DEN

LAXDEN

Los Angeles

Tue 3/11

2:35 pm-6:06 pm

Nonstop2h 31m

Denver Intl

Thu 3/13

10:47 pm-12:25 am

Nonstop2h 38m

$58

Los AngelesDenver

LAX - DEN

LAXDEN

Los Angeles

Tue 3/11

10:40 am-2:11 pm

Nonstop2h 31m

Denver Intl

Wed 3/12

2:50 pm-8:00 pm

1 stop6h 10m

$132

Los AngelesDenver

LAX - DEN

LAXDEN

Los Angeles

Mon 4/21

3:43 pm-1:10 am

1 stop8h 27m

Denver Intl

Thu 4/24

6:37 pm-11:59 pm

1 stop6h 22m

$211

Los AngelesDenver

LAX - DEN

LAXDEN

Los Angeles

Mon 3/10

4:15 pm-7:35 pm

Nonstop2h 20m

Denver Intl

Wed 3/12

3:10 pm-8:15 pm

2 stops6h 05m

$212

Los AngelesDenver

LAX - DEN

LAXDEN

Los Angeles

Wed 3/12

11:59 am-9:20 pm

1 stop8h 21m

Denver Intl

Tue 3/18

7:00 am-12:58 pm

1 stop6h 58m

$216

Los AngelesDenver

LAX - DEN

LAXDEN

Los Angeles

Tue 3/11

10:00 am-3:28 pm

1 stop4h 28m

Denver Intl

Wed 3/12

1:22 pm-3:17 pm

Nonstop2h 55m

$227

Los AngelesDenver

LAX - DEN

LAXDEN

Los Angeles

Tue 4/1

10:39 am-2:11 pm

Nonstop2h 32m

$34

Los AngelesDenver

LAX - DEN

LAXDEN

Los Angeles

Tue 3/11

9:00 am-10:28 pm

1 stop12h 28m

$84

Los AngelesDenver

LAX - DEN

LAXDEN

Los Angeles

Tue 3/18

7:59 pm-11:18 pm

Nonstop2h 19m

$99

Los AngelesDenver

LAX - DEN

LAXDEN

Los Angeles

Tue 4/8

6:00 am-1:53 pm

1 stop6h 53m

$100

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 16 results
1
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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 February 14, 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 February 20, 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 February 20, 2025.

The most flights from LAX to BD9 are scheduled on a Thursday (90 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (42 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 February 20, 2025.
See what other customers who have flown with Southwest, Alaska Airlines and Delta 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
4,411 reviews

Entertainment

7.6

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.1

Crew

8.7

Reviews

1 / 20

2.0
Mediocre

Steven,Feb 2025

BZN - DEN

Bozeman Airport knows how to deal with snow. I saw many airlines leave with only small delays due to the foot of snow. Our plane was 4 hours delayed. I missed my connection in Denver with a 3.5 hour layover. Because of that, the best you Southwest could do was make me wait more hours, them send me to Chicago Midway, where I had to wait overnight, for 7 more hours until a flight to RSW was available. Nobody at Southwest told me that Midway shuts down after 8pm. Everything was closed. I had no idea. You just dumped me there. I am a 65 year old man and you dumped me in Midway without even a couch to lie on. I was awake 21 hours because of this. No, it was not an act of God. Other airlines were moving passengers out. It was incompetence Shame on you.

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.1

Crew

8.7

Reviews

1 / 20

2.0
Mediocre

Steven,Feb 2025

BZN - DEN

Bozeman Airport knows how to deal with snow. I saw many airlines leave with only small delays due to the foot of snow. Our plane was 4 hours delayed. I missed my connection in Denver with a 3.5 hour layover. Because of that, the best you Southwest could do was make me wait more hours, them send me to Chicago Midway, where I had to wait overnight, for 7 more hours until a flight to RSW was available. Nobody at Southwest told me that Midway shuts down after 8pm. Everything was closed. I had no idea. You just dumped me there. I am a 65 year old man and you dumped me in Midway without even a couch to lie on. I was awake 21 hours because of this. No, it was not an act of God. Other airlines were moving passengers out. It was incompetence Shame on you.

Alaska Airlines
8.0
Very good
9,697 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.1

Crew

8.7

Reviews

1 / 20

2.0
Mediocre

Steven,Feb 2025

BZN - DEN

Bozeman Airport knows how to deal with snow. I saw many airlines leave with only small delays due to the foot of snow. Our plane was 4 hours delayed. I missed my connection in Denver with a 3.5 hour layover. Because of that, the best you Southwest could do was make me wait more hours, them send me to Chicago Midway, where I had to wait overnight, for 7 more hours until a flight to RSW was available. Nobody at Southwest told me that Midway shuts down after 8pm. Everything was closed. I had no idea. You just dumped me there. I am a 65 year old man and you dumped me in Midway without even a couch to lie on. I was awake 21 hours because of this. No, it was not an act of God. Other airlines were moving passengers out. It was incompetence Shame on you.

Delta
8.0
Very good
8,219 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.1

Crew

8.7

Reviews

1 / 20

2.0
Mediocre

Steven,Feb 2025

BZN - DEN

Bozeman Airport knows how to deal with snow. I saw many airlines leave with only small delays due to the foot of snow. Our plane was 4 hours delayed. I missed my connection in Denver with a 3.5 hour layover. Because of that, the best you Southwest could do was make me wait more hours, them send me to Chicago Midway, where I had to wait overnight, for 7 more hours until a flight to RSW was available. Nobody at Southwest told me that Midway shuts down after 8pm. Everything was closed. I had no idea. You just dumped me there. I am a 65 year old man and you dumped me in Midway without even a couch to lie on. I was awake 21 hours because of this. No, it was not an act of God. Other airlines were moving passengers out. It was incompetence Shame on you.

Hawaiian Airlines
7.9
Good
2,317 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.1

Crew

8.7

Reviews

1 / 20

2.0
Mediocre

Steven,Feb 2025

BZN - DEN

Bozeman Airport knows how to deal with snow. I saw many airlines leave with only small delays due to the foot of snow. Our plane was 4 hours delayed. I missed my connection in Denver with a 3.5 hour layover. Because of that, the best you Southwest could do was make me wait more hours, them send me to Chicago Midway, where I had to wait overnight, for 7 more hours until a flight to RSW was available. Nobody at Southwest told me that Midway shuts down after 8pm. Everything was closed. I had no idea. You just dumped me there. I am a 65 year old man and you dumped me in Midway without even a couch to lie on. I was awake 21 hours because of this. No, it was not an act of God. Other airlines were moving passengers out. It was incompetence Shame on you.

JetBlue
7.4
Good
3,070 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.1

Crew

8.7

Reviews

1 / 20

2.0
Mediocre

Steven,Feb 2025

BZN - DEN

Bozeman Airport knows how to deal with snow. I saw many airlines leave with only small delays due to the foot of snow. Our plane was 4 hours delayed. I missed my connection in Denver with a 3.5 hour layover. Because of that, the best you Southwest could do was make me wait more hours, them send me to Chicago Midway, where I had to wait overnight, for 7 more hours until a flight to RSW was available. Nobody at Southwest told me that Midway shuts down after 8pm. Everything was closed. I had no idea. You just dumped me there. I am a 65 year old man and you dumped me in Midway without even a couch to lie on. I was awake 21 hours because of this. No, it was not an act of God. Other airlines were moving passengers out. It was incompetence Shame on you.

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 71 daily outbound flights to Boulder from 5 different airlines.

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

    The Los Angeles to Boulder flight path was viewed by 383 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 $34. Users have also found prices from $99 and $100 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 China (96%), Avianca (93%), Cathay Pacific (92%).

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

    While on average a flight from Los Angeles to Boulder is generally $713, our data shows the cheapest flight currently is $36. When looking at the most popular route, (Los Angeles - Denver Intl), you can expect to pay $43 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.

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Top 5 airlines flying from Los Angeles to Boulder

Discover the top 5 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$55Average$142FlexibilityNo cancel feeOn-time62%
DeltaCheapest$113Average$242FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$142Average$292FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$157Average$386FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$158Average$311FlexibilityNo cancel feeOn-time63%
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