$67 Find Cheap Flights from Los Angeles to Boulder

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Los Angeles to Boulder departing on 5/20. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$95
Typical prices: $320-$194
Frontier
Mon 6/1Tue 6/9
LAX - DEN • Non-stop
Cheapest one-way
$67
Typical prices: $86-$176
Frontier
Wed 5/20
LAX - DEN • 1 stop
Arrival airport
You can't fly directly to Boulder. It is served by Denver (DEN), located 33.4 miles from Boulder.
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Flight Deals
Useful Info
Flight Deals

Cheap Flights from Los Angeles to Boulder (LAX-DEN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Los Angeles to Boulder that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Los Angeles to Boulder

Mon, Jun 1 - Tue, Jun 9
Frontier Logo
8:59 pm - 12:38 am
LAX
-
DEN
2h 39mnonstop
Frontier Logo
10:39 pm - 12:11 am
DEN
-
LAX
2h 32mnonstop
$95Frontier
Tue, Jun 2 - Thu, Jun 4
Frontier Logo
6:30 am - 10:04 am
LAX
-
DEN
2h 34mnonstop
Frontier Logo
7:00 am - 8:35 am
DEN
-
LAX
2h 35mnonstop
$96Frontier
Tue, May 19 - Thu, May 21
Frontier Logo
6:30 am - 10:04 am
LAX
-
DEN
2h 34mnonstop
Frontier Logo
10:39 pm - 12:16 am
DEN
-
LAX
2h 37mnonstop
$97Frontier
Tue, May 26 - Fri, Jun 12
Frontier Logo
6:30 am - 10:04 am
LAX
-
DEN
2h 34mnonstop
Frontier Logo
10:39 pm - 12:11 am
DEN
-
LAX
2h 32mnonstop
$98Frontier
Sun, May 31 - Wed, Jun 3
Frontier Logo
6:30 am - 10:04 am
LAX
-
DEN
2h 34mnonstop
Frontier Logo
7:20 am - 8:55 am
DEN
-
LAX
2h 35mnonstop
$99Frontier
Sun, May 31 - Sat, Jun 6
Frontier Logo
6:30 am - 10:04 am
LAX
-
DEN
2h 34mnonstop
Frontier Logo
10:39 pm - 12:16 am
DEN
-
LAX
2h 37mnonstop
$100Frontier
Wed, May 27 - Tue, Jun 2
Frontier Logo
6:30 am - 10:04 am
LAX
-
DEN
2h 34mnonstop
Frontier Logo
6:00 am - 11:23 am
DEN
-
LAX
6h 23m
1 stop
$101Frontier
Sat, Jun 13 - Sun, Jun 14
Frontier Logo
8:56 pm - 12:40 am
LAX
-
DEN
2h 44mnonstop
Frontier Logo
12:32 pm - 2:09 pm
DEN
-
LAX
2h 37mnonstop
$102Frontier
Sun, May 24 - Fri, May 29
Frontier Logo
6:30 am - 10:04 am
LAX
-
DEN
2h 34mnonstop
Frontier Logo
10:39 pm - 12:16 am
DEN
-
LAX
2h 37mnonstop
$103Frontier
Mon, Jun 1 - Wed, Jun 3
Frontier Logo
8:59 pm - 12:38 am
LAX
-
DEN
2h 39mnonstop
Frontier Logo
2:00 pm - 3:36 pm
DEN
-
LAX
2h 36mnonstop
$104Frontier
Useful Info

Good to know

Low seasonMarch
Cheapest flight$67
Best time to beat the crowds but there is an average 22% increase in price.
Most popular time to fly with an average 4% increase in price.
Flight from Los Angeles to Denver

When to book flights from Los Angeles to Boulder

Are your dates flexible? Find out the best times to travel from Los Angeles to Boulder based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Flights from Los Angeles to Boulder: the best tips from KAYAK users' own experiences

Insights shared by verified travelers who flew the route from Los Angeles to Boulder 
Verified travelerFlew with Delta
LAX
-
DEN
Apr 2025
It’s an easy short flight, so a quick recharge nap is nice. A neck pillow is recommended.
MichaelFlew with United Airlines
LAX
-
DEN
Mar 2024
Arrive early if you have carry-on luggage. Eat before you get on the plane.

FAQs for booking flights from Los Angeles to Boulder

  • Which airports will I be using when flying from Los Angeles to Boulder?

    When flying out of Los Angeles you’ll be using Los Angeles Los Angeles. Boulder does not have its own airport so you’ll be flying into nearby Denver Intl airport, which is 33.4 mi away.

  • How long does a flight from Los Angeles to Boulder take?

    Direct flights cover the 860 miles separating Los Angeles and Boulder in about 2h 15m.

  • How many flights are there between Los Angeles and Boulder?

    118 direct flights run between Los Angeles and Boulder on a daily basis. On average, there are about 829 departures each week.

  • What’s the cheapest day of the week to fly between Los Angeles and Boulder?

    Consider leaving on a Tuesday and avoid Saturdays if you are looking for the best rates. For your return to Los Angeles, you’ll find the best rates on Tuesdays and the most expensive ones on Saturdays.

  • How does KAYAK find such low prices on flights from Los Angeles to Boulder?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Los Angeles to Boulder.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Los Angeles to Boulder?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Boulder from Los Angeles is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Los Angeles to Boulder?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Boulder with an airline and back to Los Angeles with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Los Angeles to Boulder?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Boulder from Los Angeles up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which airlines provide the cheapest flights from Los Angeles to Boulder?

    In the last 72 hours, the cheapest one-way ticket between Los Angeles and Boulder found on KAYAK was with Frontier for $34. Frontier offered a round-trip connection from $58 and Delta from $100.

Top tips for finding cheap flights from Los Angeles to Boulder

  • There is no airport in Boulder. Instead, you’ll be flying into Denver Airport when flying between Los Angeles and Boulder.
  • The cheapest flight from Los Angeles to Boulder was found 76 days before departure, on average.
  • Book at least 2 weeks before departure in order to get a below-average price.
  • High season is considered to be February, March and April. The cheapest month to fly is September.

Reviews of the top 5 airlines serving Los Angeles to Boulder

 
Need help choosing which airline to fly with from Los Angeles to Boulder? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4312 reviews
8.6Crew
7.0Food
8.1Boarding
7.5Entertainment
8.0Comfort
Airline reviews

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

10.0 Excellentlarry, Apr 2026
LGB - PHX
Read more Southwest reviews

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

Delayed flight, lack of information, boarding process is a mess as is the carryon luggage causing issues when leaving the plane….just a poor experience.

Comfortable. Easy. No problems. Just wish they had gf options for snacks.

The crew was very kind and made going to Hawaii relaxing and fun to look forward to! Thank you Southwest for a pleasant flight!

We waited in the airplane for over 45 min for a southwest employee to make the flight. This cause over half the plane to miss their connecting flight in Denver. When we confronted the desk upon arrival, they told us the only flight they had was the next day leaving at 8:50 pm!!! Or they offered to get us to Burbank or LA, but after that we were on our own to get back to Santa Barbara. I paid for a flight from sba to bna bna to sba. My re entry into mom mode has been 💯 rough because of southwest mistake with my flight. And now I’m leaving to Reno tomorrow for a vballl tournament and just discovered that my leg in Vegas has me and my 3 kids on a stand by flight even though I had booked these ticket last year November!! Do better southwest!

Terrible. Even though there’s assigned seating now, they are still the slowest boarding airline of anyone.

It was good from LAX to Phoenix, But the connection in Phoenix to Tulsa was not that great. The staff on both flights were great. The choice of free entertainment was ok nothing to brag about. The 45 min delay because of some electrical issue wasn't great from Phoenix to Tulsa. We sat there with hardly any air, The seat I had was between windows so the side of the plane pushed in on you. My being a bigger man it then made the seating area uncomfortable. The seats on the plane had no power to connect to recharge your phone or anything. I would recommend that they should look into a slot or clamp to hold your phone to enjoy while watching the entertainment choices hands-free. Also make it possible to raise the inner seat by the window be able to raise the arm rest up to make more room for larger people to set more comfortably. I would also say other then that stop price gouging the airfare or nickel and diming everything. Not fair for people having to fly for emergencies and be paying for higher prices due to the season or holidays. Your making your money either way and the cost of flying is still going to be the same regardless if there's 100 people or 200 people.

Southwest was greaat! The most expensive but the least upsetting for those we were flying to see.

Boarding was easy. The seats are small and fairly uncomfortable

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

While they turned off most cabin lights to allow people to sleep, I was bothered by how bright the side lights still were. It was still quite bright for me in a window seat, when I wish I could have slept!

Generally on time departures and arrivals, clean planes, sky miles membership provides great benefits (complimentary upgrades, etc).

N Everything was perfect from boarding to assistance to baggage in Tampa

Loved the crew! Sucks that we went from 1 hour and 8 minute layover to a 3 hour layover. But weather sucks like that.

Fast, lovely scenery, great info on the Delta flight screen about landmarks we were flying over. Great landing!

Long flight but comfortable and not freezing as I have experienced on Hawaiian flights to the islands. They gave us blankets just in case. Nice touch.

I took seat 15A in anticipation of window seat, there is no window.

Flight late, the waited for a long time for “personal” to arrive at gate to dock the plane in Rochester. So annoying. This flight was expected, why aren’t personel available for the jet bridge?

My recent experience was excellent on Delta! I flew with Delta Comfort and I was really comfortable in my seat. I enjoyed the in-flight service. The flight attendants were so friendly and hospitable. I love the snack on the flight as well. This was my first time flying on Delta and I will definitely consider flying with them again.

My flight was canceled on Sunday. Rebooking took three hours. Had to pay for accommodations another night. New flight was delayed for 5 hours, all that was sent was a 12 dollar food voucher, which doesn’t tell you how to use it. Then when we landed we had to sit on the plane for an hour before we could get off.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Food was surprisingly delicious. Space in the seat is horrible when the seating front is reclined. Movie offerings were terrible. Crew was friendly and helpful.

I had a cancelled flight because of technical issues going to my destination, and a delayed flight coming home. All told it wasn’t a total bust.

The business class seat is exceptional. I wish the food is more palatable.

My flight was canceled a few hours before boarding. I was rebooked on Copa airlines and missed an important meeting .

Business class seats felt very cramped compared to other airlines.

OK, we were delayed and had to de plane and reboard.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

Women boarding passengers at the gate was absolutely rude and disrespectful of passengers. The flight attendant was absolutely delightful! Smiling and connected with the passengers. So happy. The seats are cramped and uncomfortable but I guess that’s just the way it is Communication regarding flight was excellent

Crew was great (professional, attentive, prompt). Snacks for 4 hrs flight is deplorable.

The crew was very attentive through out the flight. Seats were comfortable, nice flight bag with pillow and blanket. Food was okay, since it was a overnight flight seemed to go by fast.

Left early arrived early..right amount of talking from pilots..of course had to love the biscuit and water!

Boarding gate at LAX was too crowded—two gates next to one another

On time departure and early arrival. Flight attendant very nice.

The business class layout of chairs was weired. You are sitting directly across stranger.,

Friendly crew is the only nice thing. Seats uncomfortable. Food and snacks horrible. Movies were the same as the first 10 hour flight two weeks before

We left at 1030 am pacific from LA and supposed to land at 7 pm Eastern in NY. They made a detour, stopped in Philadelphia and didn’t land till 1130 PM Eastern!!! Worst flight experience with no pilot communication with no explanation as to what was going on. Everyone was very frustrated to say the least.

I cancelled my ticket less than 24 hours deadline but I didn’t get refunded.

Flight boarded from Gate 159B, the farthest gate in the LAX Bradley Terminal. While the flight operated on time, the first class cabin attendant made no recognition of my being an Advantage Executive Platinum member.

The flight itself was excellent but the gate attendant made me check my carryon since she said it was an inch too big. I’ve had no problems with this carryon on recent flights on Qantas, Delta, Austrian, Southwest Airlines even though the overhead bins are the same size. there were other carryons in the bins that also looked larger than mine and there was room left in the bins for more. When I picked up my carryon from baggage claim one of the wheels had broken off.

Frontier scheduled a 40 minute connection in DEN. What they failed to mention was that they “close the doors” 20 mins prior to departure, which means you only have 20 mins. Not enough time. Possibly against DOT regulations. Filing complaint.

It was an early flight and most people napped/slept and the crew let us which was nice.

More inflight connection. And leg space is horrible. And the paying for baggage I'd ridiculous!!!

Remind customers of the need to have passport or new ID for boarding.

It was costly and difficult to check in. $85 to take a small suitcase with me, carry on or checked and $75 on the return trip, Plus $25 if I didn't check my self in check in $25, because I couldn't do it on the kiosk. Small very uncomfortable seats, waited on the runway for near an hour each way. It was my worst flight to date.

It was ok. It was expensive to check 2 bags ($75.00 per bag), and then it took a long time to wait for shuttle to take us from one terminal to the terminal where the plane was taking off at LAX. And all of this for a flight where we had to pay for any food or drink that was not water.

Due to weather, my flight was delayed, further delayed, then canceled. I eventually got through to a support person who helped me find a different route out of MSP, but to get to DIA, they didn't want to, but eventually did help with the connection ticket purchase. But even this replacement flight was delayed time and time again, and I would have missed my connecting flights and I didn't want to get stuck in a layover city, so after 12 hours at the airport with two young boys who were very tired, we just cancelled our plans and spent the week at home, instead of Nana's.

When I wanted to check in 3 hours prior to boarding time, the employees mentioned “a little over an hour delay” so I waited for an hour then I went to go look for food in the terminal and most people from that flight were in the same area looking for food. Finally I decided after food to check to see if it’s anytime closer and now it’s 2 mins until boarding closes?! What are you kidding me? I didn’t receive anything via sms about boarding now nor via email or on the intercom. I luckily made it through, barely, and then there’s no room for my carry on mind you I’m in the very first row so I had to place my purse in one further row back and my carry on sections down. Not sure who pays for better seats to get your stuff placed all over the plane but that was the worst experience I’ve ever had flying with anyone.

I knew going into this that Frontier, being a low cost carrier, would be pretty bare bones and charge for most extras but this was made up for by the fact that the airplane was a reasonably new Airbus, every employee was great and best of all, Everett Washington is an amazing airport - thanks Frontier for flying there!!!

Seats were new and comfortable. Staff was fine. Missed my connection due to weather -which wasn’t their fault- but got no help at all. Gate staff sent me to customer service, which was and stayed unstaffed. Sign with QR code directed me to call or chat. Chat was useless. Call was returned after an hour. No itinerary offered by Frontier could get me home in less than 30 hours. Rebooked with another airline and got a partial refund that came to about 10 percent of what I paid to get home.

Everything you need to know for your flight from Los Angeles to Boulder

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