DEN

Find First Class Flights from Boston to Denver

1 adult
1 adult, First, 0 bags

KAYAK searches hundreds of travel sites at once for first class flights from Boston to Denver

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Denver, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Denver, as well as popular online travel agencies
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Cheap First Class Flight Deals from Boston to Denver

 
These are the cheapest deals for flights from Boston to Denver currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. 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 first class round-trip flight deals to Denver

Wed, Aug 26 - Tue, Sep 1
United Airlines Logo
8:16 pm - 10:51 pm
BOS
-
DEN
4h 35mnonstop
United Airlines Logo
3:50 pm - 1:14 am
DEN
-
BOS
7h 24m
1 stop
$839United Airlines
Tue, Jul 14 - Mon, Jul 20
American Airlines Logo
4:46 pm - 11:09 pm
BOS
-
DEN
8h 23m
1 stop
American Airlines Logo
11:55 pm - 9:55 am
DEN
-
BOS
8h 00m
1 stop
$842American Airlines
Sat, Jun 13 - Sat, Jun 20
American Airlines Logo
5:05 pm - 11:09 pm
BOS
-
DEN
8h 04m
1 stop
American Airlines Logo
11:59 pm - 8:41 am
DEN
-
BOS
6h 42m
1 stop
$847American Airlines
Thu, Jul 9 - Mon, Jul 13
United Airlines Logo
8:39 pm - 11:26 pm
BOS
-
DEN
4h 47mnonstop
United Airlines Logo
11:59 pm - 10:20 am
DEN
-
BOS
8h 21m
1 stop
$857United Airlines
Wed, Jul 1 - Mon, Jul 6
American Airlines Logo
5:45 pm - 12:17 am
BOS
-
DEN
8h 32m
1 stop
American Airlines Logo
11:59 pm - 11:08 am
DEN
-
BOS
9h 09m
1 stop
$862American Airlines
Fri, Aug 28 - Sat, Sep 5
United Airlines Logo
8:16 pm - 10:51 pm
BOS
-
DEN
4h 35mnonstop
United Airlines Logo
11:59 pm - 10:18 am
DEN
-
BOS
8h 19m
1 stop
$867United Airlines
Wed, Aug 5 - Mon, Aug 17
American Airlines Logo
7:26 am - 2:11 pm
BOS
-
DEN
8h 45m
1 stop
American Airlines Logo
6:15 am - 4:46 pm
DEN
-
BOS
8h 31m
1 stop
$872American Airlines
Fri, Aug 28 - Sat, Sep 5
United Airlines Logo
6:50 pm - 11:53 pm
BOS
-
DEN
7h 03m
1 stop
United Airlines Logo
2:50 pm - 11:35 pm
DEN
-
BOS
6h 45m
1 stop
$877United Airlines
Tue, Jul 7 - Wed, Jul 15
American Airlines Logo
4:46 pm - 11:09 pm
BOS
-
DEN
8h 23m
1 stop
American Airlines Logo
11:55 pm - 9:55 am
DEN
-
BOS
8h 00m
1 stop
$887American Airlines
Sat, Jun 13 - Sat, Jun 20
American Airlines Logo
5:05 pm - 11:09 pm
BOS
-
DEN
8h 04m
1 stop
American Airlines Logo
6:38 am - 6:05 pm
DEN
-
BOS
9h 27m
1 stop
$892American Airlines

Good to Know - First Class Flights from Boston to Denver

Low seasonJuly
Cheapest flight$416
Average price round-trip$1,312
Good deal round-trip$1,115
Good deal one-way$589
Best time to beat the crowds but there is an average 13% increase in price.
Flight from Boston to Denver
(avg. price over the last 2 weeks)
or less
or less

When to book first class flights to Denver

Are your dates flexible? We break down the daily and monthly prices for first class flights to Denver, so you can find the best time to fly.
Average price per month
Flight prices as travel date approaches

KAYAK’s Insights & Trends for Boston to Denver First Class Flights

Get data-powered insights and trends into flights from Boston to Denver to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly First Class from Boston to Denver?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Boston to Denver, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for First Class flights from Boston to Denver is January, where tickets cost $792 (round-trip) on average. On the other hand, the most expensive months are September and May, where the average cost of round-trip tickets is $1,288 and $1,219 respectively.

Which airlines offer First Class tickets between Boston and Denver?

There are 2 airlines that fly First Class from Boston to Denver. They are: Delta and United Airlines. The cheapest price of all airlines flying this route was found with Delta at $618 for a round-trip flight. On average, the best prices for flying First Class on this route can be found at Delta.

FAQs for First Class Boston to Denver Flights

  • How much is a first class ticket from Boston to Denver?

    The price of a first class flight ticket between Boston and Denver depends on many factors, like when the ticket was booked, the departure date, season and much more. The average price for all bookings made on KAYAK for this route over the last 2 weeks is $1,312 for a round-trip.

  • Is it cheaper to fly business or first class between Boston and Denver?

    Business Class tickets are usually cheaper, but that's not the case for this route, with an average return fare of $1,537, compared to $1,312 for First Class.

  • What is the best airline when flying first class between Boston and Denver?

    The highest-rated airline by KAYAK users offering first class flights for this route is Southwest, with an overall rating of 7.9.

KAYAK's Tips for Finding Cheap First Class Flights from Boston to Denver

  • What’s a good price for a first class ticket between Boston and Denver? 25% of our users found flights on this route for $628 or less one-way and $874 or less round-trip.
  • Try flying direct if you’re looking to save, as direct first class tickets are cheaper on average.

Reviews of the Top 5 Airlines Flying First Class from Boston to Denver

 
See real verified KAYAK customer reviews for airlines flying to Denver. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Boston to Denver. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly first class to Denver? 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.
7.9
SouthwestOverall score based on 4264 reviews
7.0Food
8.0Comfort
8.6Crew
7.5Entertainment
8.1Boarding
Airline reviews

The first time I flew in the extra legroom section. It was difficult to notice a difference. I had bad luck with my neighbors. The crew was okay. Southwest has reduced the live TV options.

4.0 OkayAnonymous, May 2026
MDW - LAX
Read more Southwest reviews

The first time I flew in the extra legroom section. It was difficult to notice a difference. I had bad luck with my neighbors. The crew was okay. Southwest has reduced the live TV options.

The flight was smooth. The Southwest experience has degraded overall, but this one was okay.

No gluten free snacks. Seats felt worn or bare bones even though it was a new 737 MAX 8.

One major problem that was very unprofessional and uncalled for. Plane landed and we had to wait 20 minutes to get off the plane since they were waiting for someone to come to the gate to drive the jetway. Southwest couldn't have someone available and waiting for the plane to land? Is there only one person in Hobby airport who knows to drive the jetway? Was he at lunch? In the bar? Uncomfortable and uncalled for!

The checking experience in Orlando was terrible, almost missed the flight. Too many travelers and Southwest completely understaffed.

I'm glad it wasn't only 75% full because I could get a good seat

if I was good. Not happy that I have to pay extra money to get the seat I need for lake room, but I guess that’s a sign of the times.

Seats were very comfortable. They tilted back. Drinks and snacks were free and served 3 times. Attendants were awesome.

Plane was clean and comfortable. Flight attendants and gate staff were professional, friendly and efficient. Boarding and deplaning were orderly and efficient. All in all, the typical excellent Southwest experience.

Truly terrible. Will never willingly fly southwest again. Seats are worse than before they switched to assigned seating. One flight attendant was the opposite of helpful (rude, unhelpful, dismissive, and as my stranger seatmate said unprompted: a total prick). This caused me, 15 minutes into the flight, to book an alternate return flight home on a competing airline (first class 1.2k purchase instead of my existing planned flight) just so I would not have to ever be on that aircraft, with that terrible service person, with those horrific seats ever again.

No service flight that took 5 hrs and a stop at an unscheduled airport. Crew and pilots did their jobs

Clean planes and not take my comfort class seat away.

Weather caused a long delay, but the efficiency and updates from the pilot were helpful. We were able to make our connection fortunately.

Smooth flight. Left on time, and got in 15 minutes early. Onboard video was great

It was a pleasant surprise to have complimentary Wi-Fi on the flight

Flight was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

The baggage belt was not updated on the Delta App and was displayed on the wrong belt board. Was not expecting this to happen.

The plan was delayed and left DC 90 minutes late. However, it showed a 20 minute delay on the delta app, then a 12 min delay. It turned out to be an hour delay. I found out where the plane was with flightaware. Stop keeping customers in the dark about what is going on.

Pilots lied about waiting on “paperwork”. Sat in the plane for over an hour, waiting on some papers to be printed according to the pilot and then all of a sudden he says good news maintenance is finally on their way. Maybe they can fix it before we get our paperwork. Ended up missing my connection in LaGuardia and as a result, had a fly home to Lexington instead of the Louisville airport. Then paid $100 to uber to Louisville since it was midnight by the time I got in. I wish they would just be transparent with passengers sometimes and not try to beat around the bush on why things are delayed.

One of the flight attendants was a little cranky. I appreciated the free wifi and plug to charge my laptop

Late- that’s what United does best. Missed my connection, rebooked to a flight 17 hours later and had to spend $500 on a hotel. What did I get? A $15 meal voucher. What can you get in an airport for $15. I hate United so much.

It was good overall except from Omaha to Denver when flight a was a repeatedly delayed apparently due to some issue at Denver. Communications could have been handled better. I had to board then deboard with luggage and board again

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

They told us yesterday APR21st that they were cleaning the plane and we got delayed. After that they said they didn't had any crew for the flight so they cancelled the flight till next day.

The flight crew on this leg of my trip was very friendly and pleasant. Every one of them was humorous, as well as helpful and accommodating. This group was BY FAR the best crew I’ve flown with. They deserve kudos.

The entertainment options on the seat back video boards were nice.

The boarding process was straightforward. One pertinent observation regarding all boarding procedures is that if an individual requires assistance or possesses a special status and is part of preboarding, it is advisable to limit the number of passengers who can preboard with them, rather than the entire, sometimes large, companion groups. The seats are uncomfortable, and the entertainment options are significantly inferior compared to other airlines. During the snack service, I requested an additional bag of snacks, but my request was denied. Initially, the flight attendant agreed to my request.becoming a strange accurate moment. The flight duration was four hours.

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.

During landing. 2 crew members passed 3 times by my lane and didn't notice that people in front of us had their site to the furthermore reclined... That was uncomfortable and could have been dangerous.

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.

We had better-than-average leg room and I loved the access to shows and movies. During boarding, we could not hear the agent even though we were close to the boarding door, which was kind of scary when we realized that half of the passengers had already boarded. Also, the entertainment was awesome, but I could not hear the movie as well as I would have liked, because my headphones were crappy. It would have been better if I could connect my own ear buds via Bluetooth or if JetBlue provided headphones.

On time, friendly attendants, quick wheelchair assistance and help checking in bags. Also appreciated change in seats, more forward to make it easier for my 97 year old mother to board and exit the plane. Thank you, JetBlue!

Flight did not have onboard charging and TV screen flickering.

I was seated next to an autistic child who was out of control and had a child behind me kicking my seat for most of the trip. I will never fly JetBlue again. Ever. I don't care how cheap it is. It's terrible.

Boarding process was terrible. No assigned seat until the gate, then a long line to get seat assignment.

This was the first flight I've taken since pre-pandemic. I was pleased with how orderly the boarding and disembarking went. The seats were comfortable. I loved that there was no "first class'. The attendants and passengers I met were all very friendly and welcoming.

Boarding was easy. Provided drinks and snacks. Good aircraft and staff

Not very happy because of the long delaying which causes our luggages were not on the connection flight and nearly missed our connection flight.

JetBlue was good. Kayak offered us a deal if we bundled the rental car. This was a complete scam. Kayak said the total was $222... but when we went to pick up the car the agent at Rent a wreck said that we had to pay "fees and taxes" for a grand total of $750. I would recommend not using kayak or rent a wreck. They are both complicit in this scam. JetBlue worked out well.

It was good. I’m very disappointed that they don’t give commentary ear pods for the movie. I forgot mine at home

There weren't enough employees at check in took awhile to get bags checked. There wasn't a wheel chair for me, I was sent to someone who turns out to work for a different airline, if My flight hadn't been delayed I probably would have missed my flight as it was, by the time I arrived at my gate, they started boarding in about 15 minutes. I don't know who took me to my gate, definitely was not the normal people who take passengers to the gate. I'm guessing she may have been in a management position. I wish I knew her name, she went beyond to help me. With that said everyone was kind, and were doing the best they could. So, I choose to say it was an Adventure, stressful start, but good. In the end went well. The situation was not only difficult for passengers but the employee's.

The staff at the check in counter was so rude. Made you feel Incompetent

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.

Flight was scheduled at 9:40pm. Got delayed to 10 am, the next day. crazy

The bag check, flight check-in, and onboard experience convinced my wife and me that we will actively go out of our way to avoid flying Frontier Airlines in the future. At bag check, we were informed that check-in could only be completed via the Frontier mobile app. Unfortunately, the app was extremely frustrating—sending us through repetitive, confusing loops that repeatedly forced us to decline add-on services with nearly every click. While most airline apps upsell, this one felt intentionally exhausting. As the process dragged on, we became genuinely concerned that my phone battery would die before check-in could be completed. We approached the bag check staff—who were standing together talking—and explained both our frustration and our predicament. They laughed. Later, my wife described the interaction as “gaslighting,” which felt accurate. We were then informed it would cost $25 per person simply to have our boarding passes printed. From that point forward, the tone of the experience was consistently hostile. The bag check employees were condescending and combative, behaving more like bullies than customer service staff. Unfortunately, that same attitude continued onboard. One flight attendant argued with me when I attempted to stow my backpack in the overhead bin. I explained that we had each paid $75 to check our bags specifically so we would not need to use carry-on space and could have adequate legroom. She demanded to see my ticket, pointed out that it said “no carry-on”—which I acknowledged—and I reiterated that this was precisely why we paid to check our bags. Her response was, “I don’t make the rules.” She then walked away, but not before asking if I “truly wanted to fly back to Chicago today?”—an unnecessary and unmistakable threat. It is also worth noting that despite booking our tickets together in the same transaction, we were not seated together. Upon our return to Chicago—where we could once again sit together—we compared onboard experiences. We both remarked on how unhappy the flight attendants appeared and how each of us was separately asked whether we would like to purchase a beverage. We declined. At no point was water mentioned as an option, leaving us with the clear impression that even water came at a cost—or that complimentary water, if available at all, was deliberately left unmentioned. Overall, the experience was shocking and deeply disappointing, but it was also a profound learning experience—one we will not forget and will not repeat. -Steve

Plane was hot and miserable and the crew was rude!

12 hour delay required getting on and off plane 3 times - would have at least liked to have been offered a snack or drink

They didn’t offer a water, even after I asked

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!!!

Everything you need to know for your flight to Denver

Cabin class types available on flights from Boston to Denver

Cabin classes available on flights from Boston to Denver. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.