$43+ 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 12/14. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — DEN
Dec 7 — Dec 141
1 adult, Economy
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Find cheap flights from Los Angeles to Boulder with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Los Angeles to Boulder are usually found in January or September, booked 75 days in advance, depart on a Friday or Saturday and return on a Friday
Find flight deals from Los Angeles to Boulder
Cheapest flights from Los Angeles to BoulderExplore 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 November 7, 2025.
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 November 7, 2025.
This CheapOair deal was found by Cheapflights users on 11/6. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/58:51 pmLAX - DEN
Nonstop2h 26mFrontier
Mon 12/810:50 pmDEN - LAX
Nonstop2h 39mFrontier
Deal found 11/6![Frontier logo]()
$82
This Super.com deal was found by Cheapflights users on 11/5. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/36:40 amLAX - DEN
Nonstop2h 32mFrontier
Thu 12/116:00 amDEN - LAX
1 stop5h 03mFrontier
Deal found 11/5![Frontier logo]()
$83
This Cheapflightsfares deal was found by Cheapflights users on 11/6. 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.
Wed 12/36:40 amLAX - DEN
Nonstop2h 32mFrontier
Tue 12/912:59 amDEN - LAX
1 stop12h 48mFrontier
Deal found 11/6![Frontier logo]()
$84
This Flightnetwork deal was found by Cheapflights users on 11/4. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/61:07 pmLAX - DEN
Nonstop2h 34mFrontier
Mon 12/89:59 amDEN - LAX
1 stop11h 06mFrontier
Deal found 11/4![Frontier logo]()
$85
This Super.com deal was found by Cheapflights users on 11/6. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/58:51 pmLAX - DEN
Nonstop2h 26mFrontier
Sun 12/76:00 amDEN - LAX
Nonstop2h 42mFrontier
Deal found 11/6![Frontier logo]()
$86
This Cheapflightsfares deal was found by Cheapflights users on 11/4. 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.
Fri 12/128:51 pmLAX - DEN
Nonstop2h 26mFrontier
Sun 12/146:00 amDEN - LAX
Nonstop2h 42mFrontier
Deal found 11/4![Frontier logo]()
$88
This Kiwi.com deal was found by Cheapflights users on 11/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/182:48 pmLAX - DEN
Nonstop2h 37mFrontier
Sun 11/2310:29 pmDEN - LAX
Nonstop2h 40mFrontier
Deal found 11/5![Frontier logo]()
$89
This Cheapflightsfares deal was found by Cheapflights users on 11/5. 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.
Thu 12/118:51 pmLAX - DEN
Nonstop2h 26mFrontier
Mon 12/159:59 amDEN - LAX
1 stop11h 06mFrontier
Deal found 11/5![Frontier logo]()
$90
This Cheapflightsfares deal was found by Cheapflights users on 11/4. 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.
Thu 12/48:51 pmLAX - DEN
Nonstop2h 26mFrontier
Fri 12/512:59 amDEN - LAX
1 stop12h 48mFrontier
Deal found 11/4![Frontier logo]()
$92
This Frontier deal was found by Cheapflights users on 11/5. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/253:58 pmLAX - DEN
Nonstop2h 33mFrontier
Sun 1/46:00 amDEN - LAX
Nonstop2h 42mFrontier
Deal found 11/5![Frontier logo]()
$93
This eDestinos deal was found by Cheapflights users on 11/4. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/183:27 pmLAX - DEN
1 stop6h 28mFrontier
Tue 11/257:51 amDEN - LAX
Nonstop2h 45mFrontier
Deal found 11/4![Frontier logo]()
$94
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 November 7, 2025.
Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $83 (Kiwi.com) |
One-way from | $43 (Super.com) |
Popular in | June |
Cheapest in | January |
Average price | $204 |
Cheapflights Fare Finder
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 November 7, 2025.
Use the filters below to find and compare flights from Los Angeles to Boulder that are best for you.
Fly from
Los Angeles
Fly to
Boulder
Route
Depart
Return
Price
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles
Sat 12/6
1:07 pm-4:41 pm
Nonstop2h 34m
Denver Intl
Mon 12/8
12:59 am-12:47 pm
1 stop12h 48m
$84
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles
Tue 11/18
7:00 am-10:35 am
Nonstop2h 35m
Denver Intl
Tue 11/18
12:59 am-12:28 pm
1 stop12h 29m
$95
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles
Thu 1/15
4:29 pm-7:55 pm
Nonstop2h 26m
Denver Intl
Mon 1/19
9:59 am-9:12 pm
1 stop12h 13m
$97
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles
Fri 12/12
1:40 pm-12:20 am
1 stop9h 40m
Denver Intl
Mon 12/15
10:50 pm-12:29 am
Nonstop2h 39m
$98
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles
Thu 12/4
6:40 am-10:12 am
Nonstop2h 32m
Denver Intl
Thu 12/4
12:59 am-12:47 pm
1 stop12h 48m
$102
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles
Fri 1/16
11:02 am-2:30 pm
Nonstop2h 28m
Denver Intl
Mon 1/19
8:50 pm-10:28 pm
Nonstop2h 38m
$117
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles
Sun 2/1
6:55 pm-10:21 pm
Nonstop2h 26m
Denver Intl
Sat 2/7
6:14 pm-8:06 pm
Nonstop2h 52m
$117
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles
Thu 12/25
6:40 am-10:07 am
Nonstop2h 27m
Denver Intl
Thu 12/25
5:42 pm-7:20 pm
Nonstop2h 38m
$117
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles
Sun 11/23
6:44 am-10:14 am
Nonstop2h 30m
Denver Intl
Fri 11/28
8:13 am-5:18 pm
1 stop10h 05m
$121
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles
Sun 11/23
6:44 am-10:14 am
Nonstop2h 30m
Denver Intl
Tue 12/2
5:01 pm-6:38 pm
Nonstop2h 37m
$132
Showing 1-10 of 20 results
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.
Cheapflights Insights
Everything you need to know about your flight from Los Angeles to Boulder
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 October 31, 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 75 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, March is the cheapest month in which you can book a flight from Los Angeles to Boulder (average of $36). Flying from Los Angeles to Boulder in July is currently the most expensive (average of $91). 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 November 7, 2025.
Unlike at noon, when flights are generally more expensive, you can save up to 34% on flights from Los Angeles to Boulder by exploring options for tickets in the evening.
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 Thursday evenings when fares are most often at their lowest. Monday 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 November 7, 2025.
The most flights from LAX to BD9 are scheduled on a Thursday (90 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (51 on average).
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 November 7, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from Los Angeles to Boulder by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
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.
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Alternative routes for Los Angeles to Boulder
See prices for flight routes from nearby airports that may be better suited for you.
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 November 7, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$57 | Average$148 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$84 | Average$98 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$124 | Average$238 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$138 | Average$305 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$149 | Average$352 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$156 | Average$309 | FlexibilityNo cancel fee | On-time71% |