$60+ 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 9/27. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — DEN
okt 16 — okt 231
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 October, booked 75 days in advance, depart on a Saturday or Friday 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 september 16, 2025.
Round-trip from | $86 (Frontier) |
|---|---|
One-way from | $60 (Cheapflightsfares) |
Popular in | June |
Cheapest in | January |
Average price | $180 |
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 september 16, 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 september 16, 2025.
This Frontier deal was found by Cheapflights users on 9/16. 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.
E 10/139:17 pmLAX - DEN
Nonstop2h 35mFrontier
K 10/1510:55 pmDEN - LAX
Nonstop2h 30mFrontier
Deal found 9/16![Frontier logo]()
$86
This Frontier deal was found by Cheapflights users on 9/15. 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.
K 10/156:45 amLAX - DEN
Nonstop2h 34mFrontier
K 10/1510:55 pmDEN - LAX
Nonstop2h 30mFrontier
Deal found 9/15![Frontier logo]()
$87
This Trip.com deal was found by Cheapflights users on 9/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
E 10/209:17 pmLAX - DEN
Nonstop2h 35mFrontier
N 10/236:00 amDEN - LAX
Nonstop2h 35mFrontier
Deal found 9/16![Frontier logo]()
$89
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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.
P 9/216:35 amLAX - DEN
Nonstop2h 33mFrontier
K 9/2410:55 pmDEN - LAX
Nonstop2h 32mFrontier
Deal found 9/14![Frontier logo]()
$92
This Frontier deal was found by Cheapflights users on 9/14. 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.
R 10/319:22 pmLAX - DEN
Nonstop2h 35mFrontier
L 11/110:55 pmDEN - LAX
Nonstop2h 30mFrontier
Deal found 9/14![Frontier logo]()
$93
This Frontier deal was found by Cheapflights users on 9/15. 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.
R 10/109:17 pmLAX - DEN
Nonstop2h 35mFrontier
T 10/2110:55 pmDEN - LAX
Nonstop2h 30mFrontier
Deal found 9/15![Frontier logo]()
$94
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
L 10/111:15 pmLAX - DEN
Nonstop2h 37mFrontier
N 10/1610:55 pmDEN - LAX
Nonstop2h 30mFrontier
Deal found 9/15![Frontier logo]()
$95
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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.
L 9/272:31 pmLAX - DEN
Nonstop2h 33mFrontier
T 10/710:45 amDEN - LAX
Nonstop2h 34mFrontier
Deal found 9/15![Frontier logo]()
$97
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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.
K 10/11:37 pmLAX - DEN
Nonstop2h 36mFrontier
L 10/46:39 pmDEN - LAX
Nonstop2h 34mFrontier
Deal found 9/14![Frontier logo]()
$98
This Frontier deal was found by Cheapflights users on 9/15. 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.
T 9/301:37 pmLAX - DEN
Nonstop2h 36mFrontier
L 10/46:39 pmDEN - LAX
Nonstop2h 34mFrontier
Deal found 9/15![Frontier logo]()
$99
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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.
R 10/179:17 pmLAX - DEN
Nonstop2h 35mFrontier
E 10/206:00 amDEN - LAX
Nonstop2h 35mFrontier
Deal found 9/14![Frontier logo]()
$101
This Frontier deal was found by Cheapflights users on 9/14. 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.
R 12/54:59 pmLAX - DEN
Nonstop2h 31mFrontier
T 12/99:30 amDEN - LAX
Nonstop2h 38mFrontier
Deal found 9/14![Frontier logo]()
$102
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 september 16, 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
T 12/2
8:30 pm-11:58 pm
Nonstop2h 28m
Denver Intl
K 12/10
6:25 am-8:04 am
Nonstop2h 39m
$137
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles
T 12/2
8:15 am-11:43 am
Nonstop2h 28m
Denver Intl
T 12/9
7:28 pm-9:03 pm
Nonstop2h 35m
$137
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles
T 12/2
8:15 am-11:43 am
Nonstop2h 28m
Denver Intl
N 12/11
7:28 pm-9:03 pm
Nonstop2h 35m
$147
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles
T 12/2
8:15 am-11:43 am
Nonstop2h 28m
Denver Intl
E 12/8
6:25 am-8:04 am
Nonstop2h 39m
$147
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles
L 12/13
8:30 pm-11:58 pm
Nonstop2h 28m
Denver Intl
E 12/22
6:25 am-8:04 am
Nonstop2h 39m
$148
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles
N 10/16
5:05 am-8:28 am
Nonstop2h 23m
Denver Intl
N 10/16
9:28 pm-11:00 pm
Nonstop2h 32m
$157
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles
N 10/30
8:25 pm-11:49 pm
Nonstop2h 24m
Denver Intl
E 11/3
7:19 pm-8:50 pm
Nonstop2h 31m
$157
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles
T 10/7
3:10 pm-6:30 pm
Nonstop2h 20m
Denver Intl
L 10/11
7:50 pm-9:20 pm
Nonstop2h 30m
$167
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles
N 11/20
2:40 pm-6:00 pm
Nonstop2h 20m
Denver Intl
L 11/22
6:00 pm-11:15 pm
1 stop6h 15m
$167
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles
K 10/15
8:30 am-3:20 pm
1 stop5h 50m
Denver Intl
L 10/18
1:55 pm-7:20 pm
2 stops6h 25m
$172
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 September 12, 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, 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 september 16, 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 Friday evenings when fares are most often at their lowest. Sunday afternoons 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 september 16, 2025.
The most flights from LAX to BD9 are scheduled on a Friday (102 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (54 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 september 16, 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
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
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 september 16, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$57 | Average$207 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$84 | Average$98 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$116 | Average$237 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$139 | Average$305 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$148 | Average$308 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$155 | Average$367 | FlexibilityNo cancel fee | On-time69% |