$68+ 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 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — DEN
Apr 29 — May 61
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 September or May, booked 70 days in advance, depart on a Friday or Tuesday 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 March 30, 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 March 30, 2026.
This Expedia deal was found by Cheapflights users on 3/28. 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.
Thu 4/162:44 pm
LAX
- DEN
Nonstop2h 32m
Frontier
Sat 4/189:30 pm
DEN
- LAX
Nonstop2h 44m
Frontier
Deal found 3/28![Frontier logo]()
$93
This Kiwi.com deal was found by Cheapflights users on 3/27. 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.
Thu 5/284:31 pm
LAX
- DEN
Nonstop2h 35m
Frontier
Sat 5/302:00 pm
DEN
- LAX
Nonstop2h 36m
Frontier
Deal found 3/27![Frontier logo]()
$96
This iWofly deal was found by Cheapflights users on 3/28. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/147:15 am
LAX
- DEN
Nonstop2h 32m
Frontier
Thu 4/166:00 am
DEN
- LAX
Nonstop2h 41m
Frontier
Deal found 3/28![Frontier logo]()
$97
This Kiwi.com deal was found by Cheapflights users on 3/26. 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 4/154:17 pm
LAX
- DEN
Nonstop2h 32m
Frontier
Wed 4/229:30 pm
DEN
- LAX
1 stop13h 30m
Frontier
Deal found 3/26![Frontier logo]()
$101
This Cheapflightsfares deal was found by Cheapflights users on 3/27. 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 4/166:15 am
LAX
- DEN
Nonstop2h 30m
Frontier
Sun 4/1910:29 pm
DEN
- LAX
1 stop10h 49m
Frontier
Deal found 3/27![Frontier logo]()
$102
This Kiwi.com deal was found by Cheapflights users on 3/30. 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.
Thu 4/162:44 pm
LAX
- DEN
Nonstop2h 32m
Frontier
Thu 4/236:00 am
DEN
- LAX
Nonstop2h 41m
Frontier
Deal found 3/30![Frontier logo]()
$103
This Frontier deal was found by Cheapflights users on 3/28. 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.
Sat 4/186:15 am
LAX
- DEN
Nonstop2h 30m
Frontier
Sat 4/2511:03 am
DEN
- LAX
1 stop6h 12m
Frontier
Deal found 3/28![Frontier logo]()
$104
This Cheapflightsfares deal was found by Cheapflights users on 3/30. 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 4/154:17 pm
LAX
- DEN
Nonstop2h 32m
Frontier
Sat 4/189:30 pm
DEN
- LAX
Nonstop2h 44m
Frontier
Deal found 3/30![Frontier logo]()
$105
This Kiwi.com deal was found by Cheapflights users on 3/28. 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 4/154:17 pm
LAX
- DEN
Nonstop2h 32m
Multiple Airlines
Sat 4/182:37 pm
DEN
- LAX
1 stop8h 08m
Multiple Airlines
Deal found 3/28![Multiple Airlines logo]()
$106
This Super.com deal was found by Cheapflights users on 3/28. 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.
Sat 6/136:30 am
LAX
- DEN
Nonstop2h 32m
Frontier
Tue 6/167:25 am
DEN
- LAX
Nonstop2h 33m
Frontier
Deal found 3/28![Frontier logo]()
$107
This Super.com deal was found by Cheapflights users on 3/25. 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 4/154:17 pm
LAX
- DEN
Nonstop2h 32m
Frontier
Fri 4/1710:29 pm
DEN
- LAX
Nonstop2h 42m
Frontier
Deal found 3/25![Frontier logo]()
$108
This Frontier deal was found by Cheapflights users on 3/29. 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.
Sat 5/308:59 pm
LAX
- DEN
Nonstop2h 39m
Frontier
Mon 6/12:00 pm
DEN
- LAX
Nonstop2h 36m
Frontier
Deal found 3/29![Frontier logo]()
$109
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 March 30, 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 March 30, 2026.
This Southwest deal was found by Cheapflights users on 3/25. 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.
Thu 4/237:55 pm
LAX
- DEN
Nonstop2h 15m
Southwest
Thu 4/308:55 pm
DEN
- LAX
Nonstop2h 30m
Southwest
Deal found 3/25![Southwest logo]()
$197
This United Airlines deal was found by Cheapflights users on 3/29. 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 5/208:45 am
LAX
- DEN
Nonstop2h 32m
United Airlines
Tue 5/269:20 pm
DEN
- LAX
Nonstop2h 35m
United Airlines
Deal found 3/29![United Airlines logo]()
$199
This Delta deal was found by Cheapflights users on 3/27. 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.
Thu 5/148:19 pm
LAX
- DEN
Nonstop2h 25m
Delta
Sun 5/177:25 am
DEN
- LAX
Nonstop2h 32m
Delta
Deal found 3/27![Delta logo]()
$228
This United Airlines deal was found by Cheapflights users on 3/25. 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.
Thu 4/238:40 am
LAX
- DEN
Nonstop2h 32m
United Airlines
Sun 4/269:40 am
DEN
- LAX
Nonstop2h 36m
United Airlines
Deal found 3/25![United Airlines logo]()
$227
This United Airlines deal was found by Cheapflights users on 3/25. 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.
Fri 4/177:03 pm
LAX
- DEN
Nonstop2h 27m
United Airlines
Mon 4/205:42 pm
DEN
- LAX
Nonstop2h 38m
United Airlines
Deal found 3/25![United Airlines logo]()
$229
This Southwest deal was found by Cheapflights users on 3/29. 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 5/97:30 am
LAX
- DEN
2 stops6h 10m
Southwest
Sun 5/108:35 pm
DEN
- LAX
1 stop4h 35m
Southwest
Deal found 3/29![Southwest logo]()
$253
This Delta deal was found by Cheapflights users on 3/26. 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.
Sat 5/239:55 am
LAX
- DEN
1 stop4h 03m
Delta
Mon 6/16:19 pm
DEN
- LAX
1 stop4h 31m
Delta
Deal found 3/26![Delta logo]()
$269
This United Airlines deal was found by Cheapflights users on 3/25. 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 4/157:00 am
LAX
- DEN
Nonstop2h 32m
United Airlines
Fri 4/177:45 am
DEN
- LAX
Nonstop2h 36m
United Airlines
Deal found 3/25![United Airlines logo]()
$229
This Delta deal was found by Cheapflights users on 3/25. 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.
Thu 4/165:09 pm
LAX
- DEN
1 stop4h 20m
Delta
Mon 4/206:27 pm
DEN
- LAX
1 stop6h 20m
Delta
Deal found 3/25![Delta logo]()
$269
This Delta deal was found by Cheapflights users on 3/29. 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 5/15:09 pm
LAX
- DEN
1 stop4h 20m
Delta
Tue 5/512:55 pm
DEN
- LAX
Nonstop2h 41m
Delta
Deal found 3/29![Delta logo]()
$271
This United Airlines deal was found by Cheapflights users on 3/27. 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.
Fri 5/156:32 pm
LAX
- DEN
Nonstop2h 27m
United Airlines
Sun 5/1710:04 am
DEN
- LAX
Nonstop2h 39m
United Airlines
Deal found 3/27![United Airlines logo]()
$257
Last-minute flights from Los Angeles to BoulderDiscover last-minute flight deals from Los Angeles to Boulder. Data last updated March 30, 2026 and is based on user searches.
Discover last-minute flight deals from Los Angeles to Boulder. Data last updated March 30, 2026 and is based on user searches.
This WAYA deal was found by Cheapflights users on 3/26. 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 WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/86:15 am
LAX
- DEN
Nonstop2h 30m
Frontier
Wed 4/1512:05 pm
DEN
- LAX
1 stop5h 10m
Frontier
Deal found 3/26![Frontier logo]()
$111
This iWofly deal was found by Cheapflights users on 3/28. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/147:15 am
LAX
- DEN
Nonstop2h 32m
Frontier
Thu 4/166:00 am
DEN
- LAX
Nonstop2h 41m
Frontier
Deal found 3/28![Frontier logo]()
$97
This Kiwi.com deal was found by Cheapflights users on 3/26. 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 4/154:17 pm
LAX
- DEN
Nonstop2h 32m
Frontier
Wed 4/229:30 pm
DEN
- LAX
1 stop13h 30m
Frontier
Deal found 3/26![Frontier logo]()
$101
This Cheapflightsfares deal was found by Cheapflights users on 3/30. 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 4/154:17 pm
LAX
- DEN
Nonstop2h 32m
Frontier
Sat 4/189:30 pm
DEN
- LAX
Nonstop2h 44m
Frontier
Deal found 3/30![Frontier logo]()
$105
This Kiwi.com deal was found by Cheapflights users on 3/28. 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 4/154:17 pm
LAX
- DEN
Nonstop2h 32m
Multiple Airlines
Sat 4/182:37 pm
DEN
- LAX
1 stop8h 08m
Multiple Airlines
Deal found 3/28![Multiple Airlines logo]()
$106
This Super.com deal was found by Cheapflights users on 3/25. 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 4/154:17 pm
LAX
- DEN
Nonstop2h 32m
Frontier
Fri 4/1710:29 pm
DEN
- LAX
Nonstop2h 42m
Frontier
Deal found 3/25![Frontier logo]()
$108
This Expedia deal was found by Cheapflights users on 3/28. 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.
Thu 4/162:44 pm
LAX
- DEN
Nonstop2h 32m
Frontier
Sat 4/189:30 pm
DEN
- LAX
Nonstop2h 44m
Frontier
Deal found 3/28![Frontier logo]()
$93
This Cheapflightsfares deal was found by Cheapflights users on 3/27. 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 4/166:15 am
LAX
- DEN
Nonstop2h 30m
Frontier
Sun 4/1910:29 pm
DEN
- LAX
1 stop10h 49m
Frontier
Deal found 3/27![Frontier logo]()
$102
This Kiwi.com deal was found by Cheapflights users on 3/30. 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.
Thu 4/162:44 pm
LAX
- DEN
Nonstop2h 32m
Frontier
Thu 4/236:00 am
DEN
- LAX
Nonstop2h 41m
Frontier
Deal found 3/30![Frontier logo]()
$103
This Frontier deal was found by Cheapflights users on 3/28. 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.
Sat 4/186:15 am
LAX
- DEN
Nonstop2h 30m
Frontier
Sat 4/2511:03 am
DEN
- LAX
1 stop6h 12m
Frontier
Deal found 3/28![Frontier logo]()
$104
This WAYA deal was found by Cheapflights users on 3/27. 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 WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/215:11 pm
LAX
- DEN
1 stop6h 08m
Frontier
Thu 4/236:00 am
DEN
- LAX
Nonstop2h 41m
Frontier
Deal found 3/27![Frontier logo]()
$110
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 March 30, 2026.
Search for one-way flight options from Los Angeles to Boulder. Find affordable one-way fares based on user searches. Data last updated March 30, 2026.
This Super.com deal was found by Cheapflights users on 3/29. 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.
Sun 5/106:30 am
LAX
- DEN
Nonstop2h 34m
Frontier
Deal found 3/29![Frontier logo]()
$68
This Super.com deal was found by Cheapflights users on 3/30. 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 5/18:58 pm
LAX
- DEN
1 stop6h 01m
Frontier
Deal found 3/30![Frontier logo]()
$69
This Cheapflightsfares deal was found by Cheapflights users on 3/27. 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 4/248:58 pm
LAX
- DEN
1 stop6h 01m
Frontier
Deal found 3/27![Frontier logo]()
$70
This Frontier deal was found by Cheapflights users on 3/27. 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.
Mon 5/118:27 pm
LAX
- DEN
1 stop5h 58m
Frontier
Deal found 3/27![Frontier logo]()
$71
This Super.com deal was found by Cheapflights users on 3/29. 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.
Thu 5/219:48 am
LAX
- DEN
1 stop13h 43m
Frontier
Deal found 3/29![Frontier logo]()
$75
This Frontier deal was found by Cheapflights users on 3/29. 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.
Mon 4/2010:59 pm
LAX
- DEN
1 stop9h 44m
Frontier
Deal found 3/29![Frontier logo]()
$76
This Kiwi.com deal was found by Cheapflights users on 3/29. 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 4/2111:21 am
LAX
- DEN
1 stop15h 38m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$77
This Kiwi.com deal was found by Cheapflights users on 3/29. 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.
Fri 4/1710:55 am
LAX
- DEN
1 stop21h 41m
Frontier
Deal found 3/29![Frontier logo]()
$78
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 March 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $93 (Expedia) |
One-way from | $68 (Super.com) |
Popular in | March |
Cheapest in | September |
Average price | $243 |
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 March 30, 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
Quickest round-trip
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles Los Angeles
Thu 4/23
7:55 pm-11:10 pm
Nonstop2h 15m
Denver Intl
Thu 4/30
8:55 pm-10:25 pm
Nonstop2h 30m
$197
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles Los Angeles
Wed 5/20
8:45 am-12:17 pm
Nonstop2h 32m
Denver Intl
Tue 5/26
9:20 pm-10:55 pm
Nonstop2h 35m
$199
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles Los Angeles
Thu 4/23
8:40 am-12:12 pm
Nonstop2h 32m
Denver Intl
Sun 4/26
9:40 am-11:16 am
Nonstop2h 36m
$227
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles Los Angeles
Thu 5/14
8:19 pm-11:44 pm
Nonstop2h 25m
Denver Intl
Sun 5/17
7:25 am-8:57 am
Nonstop2h 32m
$228
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles Los Angeles
Fri 4/17
7:03 pm-10:30 pm
Nonstop2h 27m
Denver Intl
Mon 4/20
5:42 pm-7:20 pm
Nonstop2h 38m
$229
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles Los Angeles
Wed 4/15
7:00 am-10:32 am
Nonstop2h 32m
Denver Intl
Fri 4/17
7:45 am-9:21 am
Nonstop2h 36m
$229
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles Los Angeles
Sat 5/9
7:30 am-2:40 pm
2 stops6h 10m
Denver Intl
Sun 5/10
8:35 pm-12:10 am
1 stop4h 35m
$253
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles Los Angeles
Fri 5/15
6:32 pm-9:59 pm
Nonstop2h 27m
Denver Intl
Sun 5/17
10:04 am-11:43 am
Nonstop2h 39m
$257
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles Los Angeles
Sat 5/23
9:55 am-2:58 pm
1 stop4h 03m
Denver Intl
Mon 6/1
6:19 pm-9:50 pm
1 stop4h 31m
$269
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles Los Angeles
Thu 4/16
5:09 pm-10:29 pm
1 stop4h 20m
Denver Intl
Mon 4/20
6:27 pm-11:47 pm
1 stop6h 20m
$269
Showing 1-10 of 22 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
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 March 13, 2026.
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 70 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, August is the cheapest month in which you can book a flight from Los Angeles to Boulder (average of $45). 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 March 30, 2026.
Unlike in the afternoon, when flights are generally more expensive, you can save up to 14% 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 March 28, 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.
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 March 30, 2026.
The most flights from LAX to BD9 are scheduled on a Monday (86 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (42 on average).
How much does it cost to fly round-trip from Los Angeles to Boulder?
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 March 30, 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
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
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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Complete your trip
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Search flights from Los Angeles to Boulder by cabin class
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Los Angeles and Boulder flights
Browse other Los Angeles and Boulder flight options. Last updated on March 30, 2026.
Other flights from Los Angeles
Browse through other flights departing from Los Angeles. Flights are based on user searches made on Cheapflights and were last updated on March 30, 2026.
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Los Angeles to Boulder flights
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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 2,558,603 searches. Data last updated March 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$59 | Average$165 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$94 | Average$113 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$98 | Average$236 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$129 | Average$265 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$138 | Average$313 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$146 | Average$327 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$148 | Average$265 | FlexibilityNo cancel fee | On-time71% |