$35+ Cheap flights from Los Angeles (LAX) to Boulder, CO
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/27. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — DEN
Oct 15 — Oct 221
Round-trip
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 Los Angeles to Boulder are usually found in February or October, booked 83 days in advance, depart on a Wednesday or Saturday and return on a Thursday
Cheap flight deals from Los Angeles to Boulder
Cheapest
Best
Last-minute
One-way
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 15, 2026.
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 15, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 9/11. 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 10/142:01 pm -
Nonstop2h 33m
Mon 10/1910:55 pm -
Nonstop2h 34m
Deal found 9/11![Frontier logo]()
$87
This Cheapflightsfares deal was found by Cheapflights users on 9/11. 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 10/232:28 pm -
Nonstop2h 33m
Tue 10/2710:55 pm -
Nonstop2h 28m
Deal found 9/11![Frontier logo]()
$94
This Trip.com deal was found by Cheapflights users on 9/11. 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.
Wed 10/142:01 pm -
Nonstop2h 33m
Wed 10/211:10 pm -
Nonstop2h 30m
Deal found 9/11![Frontier logo]()
$95
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Wed 10/2811:42 am -
Nonstop2h 29m
Sat 10/311:04 pm -
1 stop10h 55m
Deal found 9/11![Frontier logo]()
$96
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 10/272:03 pm -
Nonstop2h 32m
Sat 10/311:04 pm -
1 stop10h 55m
Deal found 9/11![Frontier logo]()
$97
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.
Wed 10/146:05 am -
Nonstop2h 25m
Mon 10/269:00 am -
Nonstop2h 45m
Deal found 9/15![Frontier logo]()
$98
This Priceline deal was found by Cheapflights users on 9/11. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/66:15 am -
Nonstop2h 30m
Sun 11/810:55 pm -
Nonstop2h 28m
Deal found 9/11![Frontier logo]()
$101
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 10/142:01 pm -
Nonstop2h 33m
Tue 10/201:10 pm -
Nonstop2h 30m
Deal found 9/10![Frontier logo]()
$102
This Cheapflightsfares deal was found by Cheapflights users on 9/11. 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 9/306:05 am -
Nonstop2h 27m
Sat 10/310:44 pm -
Nonstop2h 26m
Deal found 9/11![Frontier logo]()
$103
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.
Wed 11/42:03 pm -
Nonstop2h 32m
Fri 11/610:55 pm -
Nonstop2h 28m
Deal found 9/14![Frontier logo]()
$104
This Booking.com deal was found by Cheapflights users on 9/11. 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.
Sat 10/36:05 am -
Nonstop2h 27m
Mon 10/59:05 am -
Nonstop2h 34m
Deal found 9/11![Frontier logo]()
$105
Best flights from Los Angeles to BoulderDiscover carefully curated flight deals from Los Angeles to Boulder that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2026.
Discover carefully curated flight deals from Los Angeles to Boulder that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2026.
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/145:20 am -
1 stop4h 25m
Mon 10/195:30 pm -
1 stop4h 35m
Deal found 9/14![Southwest logo]()
$250
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/62:25 pm -
Nonstop2h 21m
Sun 11/87:05 am -
Nonstop2h 33m
Deal found 9/14![Delta logo]()
$308
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/247:00 am -
Nonstop2h 27m
Sun 11/296:00 am -
Nonstop2h 35m
Deal found 9/15![United Airlines logo]()
$336
This Alaska Airlines deal was found by Cheapflights users on 9/11. 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.
Tue 10/2712:57 pm -
2 stops8h 15m
Thu 10/293:30 pm -
1 stop8h 25m
Deal found 9/11![Alaska Airlines logo]()
$360
This Southwest deal was found by Cheapflights users on 9/11. 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 10/104:30 pm -
1 stop4h 05m
Tue 10/133:25 pm -
2 stops5h 25m
Deal found 9/11![Southwest logo]()
$326
This Delta deal was found by Cheapflights users on 9/13. 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.
Tue 10/132:00 pm -
1 stop8h 55m
Wed 10/149:41 am -
1 stop6h 19m
Deal found 9/13![Delta logo]()
$331
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/255:00 am -
Nonstop2h 26m
Sun 11/296:00 am -
Nonstop2h 35m
Deal found 9/15![United Airlines logo]()
$336
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/2312:05 pm -
1 stop4h 55m
Sat 10/244:15 pm -
2 stops5h 45m
Deal found 9/14![Southwest logo]()
$328
This Delta deal was found by Cheapflights users on 9/13. 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 10/142:47 pm -
Nonstop2h 22m
Fri 10/164:18 pm -
1 stop8h 37m
Deal found 9/13![Delta logo]()
$346
This Southwest deal was found by Cheapflights users on 9/12. 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 10/105:25 am -
2 stops5h 55m
Sat 10/175:55 am -
Nonstop2h 30m
Deal found 9/12![Southwest logo]()
$331
This Southwest deal was found by Cheapflights users on 9/12. 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.
Fri 11/65:00 am -
2 stops5h 10m
Mon 11/92:00 pm -
1 stop4h 00m
Deal found 9/12![Southwest logo]()
$337
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/165:45 pm -
1 stop4h 25m
Mon 10/191:15 pm -
2 stops5h 15m
Deal found 9/15![Southwest logo]()
$352
Last-minute flights from Los Angeles to BoulderDiscover last-minute flight deals from Los Angeles to Boulder. Data last updated September 15, 2026 and is based on user searches.
Discover last-minute flight deals from Los Angeles to Boulder. Data last updated September 15, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 9/11. 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 9/306:05 am -
Nonstop2h 27m
Sat 10/310:44 pm -
Nonstop2h 26m
Deal found 9/11![Frontier logo]()
$103
This Booking.com deal was found by Cheapflights users on 9/11. 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.
Sat 10/36:05 am -
Nonstop2h 27m
Mon 10/59:05 am -
Nonstop2h 34m
Deal found 9/11![Frontier logo]()
$105
This Cheapflightsfares deal was found by Cheapflights users on 9/11. 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 10/142:01 pm -
Nonstop2h 33m
Mon 10/1910:55 pm -
Nonstop2h 34m
Deal found 9/11![Frontier logo]()
$87
This Trip.com deal was found by Cheapflights users on 9/11. 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.
Wed 10/142:01 pm -
Nonstop2h 33m
Wed 10/211:10 pm -
Nonstop2h 30m
Deal found 9/11![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.
Wed 10/146:05 am -
Nonstop2h 25m
Mon 10/269:00 am -
Nonstop2h 45m
Deal found 9/15![Frontier logo]()
$98
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 10/142:01 pm -
Nonstop2h 33m
Tue 10/201:10 pm -
Nonstop2h 30m
Deal found 9/10![Frontier logo]()
$102
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:05 am -
Nonstop2h 25m
Sat 10/241:10 pm -
Nonstop2h 30m
Deal found 9/15![Frontier logo]()
$107
This Cheapflightsfares deal was found by Cheapflights users on 9/11. 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 10/232:28 pm -
Nonstop2h 33m
Tue 10/2710:55 pm -
Nonstop2h 28m
Deal found 9/11![Frontier logo]()
$94
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 10/272:03 pm -
Nonstop2h 32m
Sat 10/311:04 pm -
1 stop10h 55m
Deal found 9/11![Frontier logo]()
$97
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Wed 10/2811:42 am -
Nonstop2h 29m
Sat 10/311:04 pm -
1 stop10h 55m
Deal found 9/11![Frontier logo]()
$96
One-way flights from Los Angeles to BoulderSearch for one-way flight options from Los Angeles to Boulder. Find affordable one-way fares based on user searches. Data last updated September 15, 2026.
Search for one-way flight options from Los Angeles to Boulder. Find affordable one-way fares based on user searches. Data last updated September 15, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/12. 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 10/2711:42 am -
Nonstop2h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Frontier logo]()
$35
This Cheapflightsfares deal was found by Cheapflights users on 9/11. 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 12/211:46 am -
1 stop6h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Frontier logo]()
$78
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.
Thu 10/811:40 am -
Nonstop2h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Frontier logo]()
$79
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.
Mon 10/126:05 am -
Nonstop2h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Frontier logo]()
$80
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/196:05 am -
Nonstop2h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Frontier logo]()
$81
This Super.com deal was found by Cheapflights users on 9/11. 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.
Tue 10/68:44 am -
1 stop24h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Frontier logo]()
$82
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.
Fri 11/132:31 pm -
Nonstop2h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Frontier logo]()
$83
This Super.com deal was found by Cheapflights users on 9/11. 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 10/711:30 am -
1 stop6h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Frontier logo]()
$84
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Mon 11/161:41 pm -
1 stop21h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Frontier logo]()
$85
This Flightnetwork 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/292:31 pm -
Nonstop2h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Frontier logo]()
$87
This Super.com deal was found by Cheapflights users on 9/11. 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 10/92:28 pm -
Nonstop2h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Frontier logo]()
$88
Find 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 15, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $87 (Cheapflightsfares) |
One-way from | $35 (Kiwi.com) |
Popular in | July |
Cheapest in | February |
Average price | $221 |
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 7,457,451 searches. Data last updated September 15, 2026.
Use the filters below to find and compare flights from Los Angeles to Boulder that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Los AngelesDenver
LAX Los Angeles Los Angeles - DEN Denver Intl
LAXDEN
Los Angeles Los Angeles
Fri 11/13
2:31 pm-6:03 pm
Nonstop2h 32m
Denver Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$83
Los AngelesDenver
LAX Los Angeles Los Angeles - DEN Denver Intl
LAXDEN
Los Angeles Los Angeles
Mon 11/9
8:15 am-11:42 am
Nonstop2h 27m
Denver Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$89
Quickest round-trip
Los AngelesDenver
LAX Los Angeles Los Angeles - DEN Denver Intl
LAXDEN
Los Angeles Los Angeles
Sat 12/12
8:50 am-12:10 pm
Nonstop2h 20m
Denver Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$100
Los AngelesDenver
LAX Los Angeles Los Angeles - DEN Denver Intl
LAXDEN
Los Angeles Los Angeles
Fri 10/16
12:50 am-7:45 am
1 stop5h 55m
Denver Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$110
Los AngelesDenver
LAX Los Angeles Los Angeles - DEN Denver Intl
LAXDEN
Los Angeles Los Angeles
Tue 10/20
6:30 am-11:50 am
1 stop4h 20m
Denver Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$110
Los AngelesDenver
LAX Los Angeles Los Angeles - DEN Denver Intl
LAXDEN
Los Angeles Los Angeles
Tue 10/27
8:20 am-3:15 pm
2 stops5h 55m
Denver Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$114
Los AngelesDenver
LAX Los Angeles Los Angeles - DEN Denver Intl
LAXDEN
Los Angeles Los Angeles
Fri 11/13
5:00 am-11:10 am
2 stops5h 10m
Denver Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$138
Los AngelesDenver
LAX Los Angeles Los Angeles - DEN Denver Intl
LAXDEN
Los Angeles Los Angeles
Tue 9/22
6:05 am-9:32 am
Nonstop2h 27m
Denver Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$139
Los AngelesDenver
LAX Los Angeles Los Angeles - DEN Denver Intl
LAXDEN
Los Angeles Los Angeles
Mon 11/9
9:57 pm-8:22 am
2 stops9h 25m
Denver Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$151
Los AngelesDenver
LAX Los Angeles Los Angeles - DEN Denver Intl
LAXDEN
Los Angeles Los Angeles
Fri 10/30
8:05 am-1:00 pm
1 stop3h 55m
Denver Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$156
Showing 1-10 of 23 resultsSorted by cheapest first
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.
LAX-DEN
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
LAX-BD9
LAX-DEN
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 15, 2026.
Unlike in the morning, when flights are generally more expensive, you can save up to 16% on flights from Los Angeles to Boulder by exploring options for tickets in the evening.
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 15, 2026.
The most flights from LAX to BD9 are scheduled on a Monday (99 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (47 on average).
How much does it cost to fly round-trip from Los Angeles to Boulder?
Airfare is below average for this route at the moment.
Los Angeles to Boulder flights typically cost between $149 and $307 in October.The cheapest round-trip price found within the last 5 days was $87 on Frontier (Oct 14-Oct 19).
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 September 12, 2026.
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.
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 15, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andUnited 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.
Overall
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
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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Los Angeles and Boulder flights
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Other flights from Los Angeles
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Top 7 airlines flying from Los Angeles to Boulder
Discover the top 7 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 7,457,451 searches. Data last updated September 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$57 | Average$178 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$98 | Average$277 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$150 | Average$336 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$159 | Average$360 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$166 | Average$265 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$168 | Average$321 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$300 | Average$537 | FlexibilityNo cancel fee | On-time75% |