$81+ 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 9/12. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — DEN
Sep 5 — Sep 121
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 October, booked 63 days in advance, depart on a Wednesday or Friday and return on a Friday
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 August 6, 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 August 6, 2026.
This Frontier deal was found by Cheapflights users on 8/3. 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.
Tue 9/156:05 am -
Nonstop2h 27m
Wed 9/1612:42 pm -
Nonstop2h 32m
Deal found 8/3![Frontier logo]()
$102
This iWofly deal was found by Cheapflights users on 8/3. 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 8/259:40 am -
Nonstop2h 33m
Mon 8/3110:39 pm -
Nonstop2h 32m
Deal found 8/3![Frontier logo]()
$103
This Trip.com deal was found by Cheapflights users on 8/5. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/126:15 am -
Nonstop2h 25m
Wed 10/1410:29 pm -
Nonstop2h 34m
Deal found 8/5![Frontier logo]()
$106
This Trip.com deal was found by Cheapflights users on 8/5. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:15 am -
Nonstop2h 25m
Mon 10/1912:17 pm -
Nonstop2h 42m
Deal found 8/5![Frontier logo]()
$107
This Cheapflightsfares deal was found by Cheapflights users on 8/3. 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 8/279:09 pm -
Nonstop2h 35m
Thu 9/37:00 am -
Nonstop2h 30m
Deal found 8/3![Frontier logo]()
$110
This Super.com deal was found by Cheapflights users on 8/2. 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.
Mon 9/76:30 am -
Nonstop2h 33m
Mon 9/141:10 pm -
Nonstop2h 29m
Deal found 8/2![Frontier logo]()
$111
This Frontier deal was found by Cheapflights users on 8/1. 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 10/156:15 am -
Nonstop2h 25m
Thu 10/1512:17 pm -
Nonstop2h 42m
Deal found 8/1![Frontier logo]()
$112
This Kiwi.com deal was found by Cheapflights users on 8/5. 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.
Sat 9/59:09 pm -
Nonstop2h 35m
Wed 9/910:44 pm -
Nonstop2h 26m
Deal found 8/5![Frontier logo]()
$113
This Frontier deal was found by Cheapflights users on 8/1. 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.
Sun 9/66:30 am -
Nonstop2h 33m
Wed 9/99:07 am -
1 stop4h 59m
Deal found 8/1![Frontier logo]()
$114
This Cheapflightsfares deal was found by Cheapflights users on 8/5. 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 8/279:09 pm -
Nonstop2h 35m
Wed 9/27:25 am -
Nonstop2h 30m
Deal found 8/5![Frontier logo]()
$115
This Cheapflightsfares deal was found by Cheapflights users on 8/2. 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 9/116:05 am -
Nonstop2h 27m
Wed 9/1610:29 pm -
1 stop13h 08m
Deal found 8/2![Frontier logo]()
$116
This Frontier deal was found by Cheapflights users on 8/1. 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.
Tue 9/19:40 am -
Nonstop2h 33m
Mon 9/77:00 am -
Nonstop2h 30m
Deal found 8/1![Frontier logo]()
$117
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 August 6, 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 August 6, 2026.
This Delta deal was found by Cheapflights users on 8/1. 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 9/56:30 pm -
Nonstop2h 19m
Sun 9/61:44 pm -
Nonstop2h 31m
Deal found 8/1![Delta logo]()
$158
This Southwest deal was found by Cheapflights users on 8/2. 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 9/510:25 am -
Nonstop2h 15m
Sun 9/68:50 am -
1 stop5h 40m
Deal found 8/2![Southwest logo]()
$167
This Delta deal was found by Cheapflights users on 8/3. 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 9/118:39 pm -
Nonstop2h 15m
Mon 9/148:06 am -
Nonstop2h 29m
Deal found 8/3![Delta logo]()
$174
This Southwest deal was found by Cheapflights users on 8/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/68:10 am -
1 stop6h 00m
Fri 9/1112:30 pm -
1 stop5h 40m
Deal found 8/5![Southwest logo]()
$177
This Southwest deal was found by Cheapflights users on 8/1. 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.
Tue 10/63:35 pm -
Nonstop2h 15m
Tue 10/132:10 pm -
Nonstop2h 30m
Deal found 8/1![Southwest logo]()
$191
This Southwest deal was found by Cheapflights users on 8/1. 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 9/28:25 am -
1 stop4h 15m
Sat 9/51:35 pm -
2 stops6h 15m
Deal found 8/1![Southwest logo]()
$199
This Southwest deal was found by Cheapflights users on 8/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/272:50 pm -
1 stop4h 20m
Mon 8/318:05 am -
2 stops7h 25m
Deal found 8/5![Southwest logo]()
$212
This Southwest deal was found by Cheapflights users on 8/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/319:55 am -
1 stop6h 05m
Mon 11/27:15 pm -
2 stops5h 50m
Deal found 8/5![Southwest logo]()
$216
This Southwest deal was found by Cheapflights users on 8/1. 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 11/47:25 am -
2 stops6h 05m
Sat 11/78:20 am -
1 stop7h 20m
Deal found 8/1![Southwest logo]()
$216
This Southwest deal was found by Cheapflights users on 8/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/37:20 am -
2 stops6h 10m
Sat 11/78:50 am -
1 stop5h 40m
Deal found 8/4![Southwest logo]()
$216
This Southwest deal was found by Cheapflights users on 8/6. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/78:20 am -
Nonstop2h 20m
Mon 10/127:40 am -
Nonstop2h 35m
Deal found 8/6![Southwest logo]()
$256
Last-minute flights from Los Angeles to BoulderDiscover last-minute flight deals from Los Angeles to Boulder. Data last updated August 6, 2026 and is based on user searches.
Discover last-minute flight deals from Los Angeles to Boulder. Data last updated August 6, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 8/1. 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 8/2410:22 pm -
1 stop4h 26m
Sun 9/610:39 pm -
Nonstop2h 32m
Deal found 8/1![Frontier logo]()
$118
This iWofly deal was found by Cheapflights users on 8/3. 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 8/259:40 am -
Nonstop2h 33m
Mon 8/3110:39 pm -
Nonstop2h 32m
Deal found 8/3![Frontier logo]()
$103
This Cheapflightsfares deal was found by Cheapflights users on 8/3. 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 8/279:09 pm -
Nonstop2h 35m
Thu 9/37:00 am -
Nonstop2h 30m
Deal found 8/3![Frontier logo]()
$110
This Cheapflightsfares deal was found by Cheapflights users on 8/5. 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 8/279:09 pm -
Nonstop2h 35m
Wed 9/27:25 am -
Nonstop2h 30m
Deal found 8/5![Frontier logo]()
$115
This Frontier deal was found by Cheapflights users on 8/1. 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.
Tue 9/19:40 am -
Nonstop2h 33m
Mon 9/77:00 am -
Nonstop2h 30m
Deal found 8/1![Frontier logo]()
$117
This Kiwi.com deal was found by Cheapflights users on 8/5. 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.
Sat 9/59:09 pm -
Nonstop2h 35m
Wed 9/910:44 pm -
Nonstop2h 26m
Deal found 8/5![Frontier logo]()
$113
This Mytrip deal was found by Cheapflights users on 8/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/54:15 pm -
1 stop4h 38m
Sun 9/67:00 am -
Nonstop2h 30m
Deal found 8/2![Frontier logo]()
$119
This Cheapflightsfares deal was found by Cheapflights users on 8/2. 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.
Sun 9/66:30 am -
Nonstop2h 33m
Sat 9/127:30 am -
1 stop9h 53m
Deal found 8/2![Frontier logo]()
$112
This Frontier deal was found by Cheapflights users on 8/1. 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.
Sun 9/66:30 am -
Nonstop2h 33m
Wed 9/99:07 am -
1 stop4h 59m
Deal found 8/1![Frontier logo]()
$114
This Super.com deal was found by Cheapflights users on 8/2. 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.
Mon 9/76:30 am -
Nonstop2h 33m
Mon 9/141:10 pm -
Nonstop2h 29m
Deal found 8/2![Frontier logo]()
$111
This Cheapflightsfares deal was found by Cheapflights users on 8/2. 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 9/116:05 am -
Nonstop2h 27m
Wed 9/1610:29 pm -
1 stop13h 08m
Deal found 8/2![Frontier logo]()
$116
This Frontier deal was found by Cheapflights users on 8/3. 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.
Tue 9/156:05 am -
Nonstop2h 27m
Wed 9/1612:42 pm -
Nonstop2h 32m
Deal found 8/3![Frontier logo]()
$102
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 August 6, 2026.
Search for one-way flight options from Los Angeles to Boulder. Find affordable one-way fares based on user searches. Data last updated August 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/1. 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.
Sat 9/125:20 pm -
1 stop5h 24m
Deal found 8/1![Frontier logo]()
$81
This eDestinos deal was found by Cheapflights users on 8/3. 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.
Thu 8/206:30 am -
Nonstop2h 33m
Deal found 8/3![Frontier logo]()
$82
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 11/29:56 pm -
1 stop4h 56m
Deal found 8/3![Frontier logo]()
$83
This Super.com deal was found by Cheapflights users on 8/2. 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 9/2712:59 am -
1 stop6h 16m
Deal found 8/2![Frontier logo]()
$84
This Super.com deal was found by Cheapflights users on 8/1. 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 9/912:45 pm -
1 stop4h 30m
Deal found 8/1![Frontier logo]()
$85
This Cheapflightsfares deal was found by Cheapflights users on 8/1. 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.
Mon 10/122:54 pm -
1 stop7h 13m
Deal found 8/1![Frontier logo]()
$86
This Kiwi.com deal was found by Cheapflights users on 8/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/26:55 am -
1 stop16h 15m
Deal found 8/4![Frontier logo]()
$87
This Southwest deal was found by Cheapflights users on 8/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/68:10 am -
1 stop6h 00m
Deal found 8/5![Southwest logo]()
$89
This Cheapflightsfares deal was found by Cheapflights users on 8/1. 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.
Mon 9/76:30 am -
Nonstop2h 33m
Deal found 8/1![Frontier logo]()
$90
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 10/811:47 am -
1 stop11h 28m
Deal found 8/3![Frontier logo]()
$91
This Cheapflightsfares deal was found by Cheapflights users on 8/4. 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.
Sat 10/246:45 am -
1 stop12h 19m
Deal found 8/4![Frontier logo]()
$92
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 August 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $102 (Frontier) |
One-way from | $81 (Kiwi.com) |
Popular in | July |
Cheapest in | September |
Average price | $220 |
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 August 6, 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
Sat 9/5
6:30 pm-9:49 pm
Nonstop2h 19m
Denver Intl
Sun 9/6
1:44 pm-3:15 pm
Nonstop2h 31m
$158
Los AngelesDenver
LAX Los Angeles Los Angeles - DEN Denver Intl
LAXDEN
Los Angeles Los Angeles
Sat 9/5
10:25 am-1:40 pm
Nonstop2h 15m
Denver Intl
Sun 9/6
8:50 am-1:30 pm
1 stop5h 40m
$167
Quickest round-trip
Los AngelesDenver
LAX Los Angeles Los Angeles - DEN Denver Intl
LAXDEN
Los Angeles Los Angeles
Fri 9/11
8:39 pm-11:54 pm
Nonstop2h 15m
Denver Intl
Mon 9/14
8:06 am-9:35 am
Nonstop2h 29m
$174
Los AngelesDenver
LAX Los Angeles Los Angeles - DEN Denver Intl
LAXDEN
Los Angeles Los Angeles
Sun 9/6
8:10 am-3:10 pm
1 stop6h 00m
Denver Intl
Fri 9/11
12:30 pm-5:10 pm
1 stop5h 40m
$177
Los AngelesDenver
LAX Los Angeles Los Angeles - DEN Denver Intl
LAXDEN
Los Angeles Los Angeles
Tue 10/6
3:35 pm-6:50 pm
Nonstop2h 15m
Denver Intl
Tue 10/13
2:10 pm-3:40 pm
Nonstop2h 30m
$191
Los AngelesDenver
LAX Los Angeles Los Angeles - DEN Denver Intl
LAXDEN
Los Angeles Los Angeles
Wed 9/2
8:25 am-1:40 pm
1 stop4h 15m
Denver Intl
Sat 9/5
1:35 pm-6:50 pm
2 stops6h 15m
$199
Los AngelesDenver
LAX Los Angeles Los Angeles - DEN Denver Intl
LAXDEN
Los Angeles Los Angeles
Thu 8/27
2:50 pm-8:10 pm
1 stop4h 20m
Denver Intl
Mon 8/31
8:05 am-2:30 pm
2 stops7h 25m
$212
Los AngelesDenver
LAX Los Angeles Los Angeles - DEN Denver Intl
LAXDEN
Los Angeles Los Angeles
Sat 10/31
9:55 am-5:00 pm
1 stop6h 05m
Denver Intl
Mon 11/2
7:15 pm-12:05 am
2 stops5h 50m
$216
Los AngelesDenver
LAX Los Angeles Los Angeles - DEN Denver Intl
LAXDEN
Los Angeles Los Angeles
Wed 11/4
7:25 am-2:30 pm
2 stops6h 05m
Denver Intl
Sat 11/7
8:20 am-2:40 pm
1 stop7h 20m
$216
Los AngelesDenver
LAX Los Angeles Los Angeles - DEN Denver Intl
LAXDEN
Los Angeles Los Angeles
Tue 11/3
7:20 am-2:30 pm
2 stops6h 10m
Denver Intl
Sat 11/7
8:50 am-1:30 pm
1 stop5h 40m
$216
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
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 August 6, 2026.
Unlike in the morning, when flights are generally more expensive, you can save up to 15% 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 August 6, 2026.
The most flights from LAX to BD9 are scheduled on a Wednesday (101 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (32 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 $155 and $309 in September.The cheapest round-trip price found within the last 5 days was $102 on Frontier (Sep 15-Sep 16).
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 August 1, 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 August 6, 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.
Crew
8.6
Food
7.0
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Food
7.0
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Food
7.0
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Food
7.0
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Food
7.0
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Food
7.0
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Overall
8.0
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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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 August 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$57 | Average$173 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$95 | Average$270 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$141 | Average$265 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$143 | Average$327 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$157 | Average$356 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$159 | Average$319 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$425 | Average$563 | FlexibilityNo cancel fee | On-time75% |