DEN - BUF

$73 Find Cheap Flights from Denver to Buffalo

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to Buffalo departing on 5/12. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Buffalo

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Buffalo.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Buffalo.
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Everything you should know

Cheapest round-trip
$166
Overall average: $348
Frontier
Wed 4/22Sat 4/25
DEN - BUF • 1 stop
Cheapest non-stop
$289
Typical prices: $386-$438
United Airlines
Wed 4/22Fri 4/24
DEN - BUF • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Southwest's two free checked bags save on fees.
Frontier's Premium Bundle adds legroom for $20 more.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $166 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
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Airline reviews
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Nonstop flights
You can fly direct with United Airlines and Southwest. Average duration is 3h 12m
Direct flights
Direct flights
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Direct flights
Direct flights
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Top layover airports
Cheapest • Avg $286 (round-trip)
Shortest trip • 5h 02m (one-way)
Insights
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Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 39% compared to booking last minute.
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When to travel
Cheapest • 24% price drop
Most popular
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Flight Deals
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Flight Deals

Cheap Flights from Denver to Buffalo (DEN-BUF)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Denver to Buffalo 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 Denver to Buffalo

Wed, Apr 22 - Sat, Apr 25
Frontier Logo
1:09 pm - 11:40 am
DEN
-
BUF
20h 31m
1 stop
Frontier Logo
1:11 pm - 10:29 pm
BUF
-
DEN
11h 18m
1 stop
$166Frontier
Wed, Apr 22 - Sat, Apr 25
Frontier Logo
3:07 pm - 11:40 am
DEN
-
BUF
18h 33m
2 stops
Frontier Logo
1:11 pm - 10:29 pm
BUF
-
DEN
11h 18m
1 stop
$189Frontier
Wed, Apr 15 - Sat, Apr 18
Frontier Logo
11:59 pm - 11:40 am
DEN
-
BUF
9h 41m
1 stop
Frontier Logo
1:11 pm - 10:29 pm
BUF
-
DEN
11h 18m
1 stop
$202Frontier
Thu, Apr 23 - Tue, Apr 28
Frontier Logo
6:00 am - 11:23 am
DEN
-
BUF
27h 23m
2 stops
Frontier Logo
1:56 pm - 10:29 pm
BUF
-
DEN
10h 33m
1 stop
$206Frontier
Thu, Apr 16 - Mon, Apr 20
Frontier Logo
11:59 pm - 9:57 am
DEN
-
BUF
7h 58m
1 stop
Frontier Logo
12:32 pm - 10:29 pm
BUF
-
DEN
11h 57m
1 stop
$210Frontier
Thu, Apr 23 - Sat, Apr 25
Frontier Logo
6:00 am - 11:23 am
DEN
-
BUF
27h 23m
2 stops
Frontier Logo
1:11 pm - 10:29 pm
BUF
-
DEN
11h 18m
1 stop
$212Frontier
Thu, Apr 16 - Sun, Apr 19
Frontier Logo
11:59 pm - 11:13 am
DEN
-
BUF
9h 14m
1 stop
Frontier Logo
8:18 pm - 11:59 pm
BUF
-
DEN
29h 41m
1 stop
$217Frontier
Wed, May 6 - Thu, May 7
Frontier Logo
11:54 pm - 10:41 am
DEN
-
BUF
8h 47m
1 stop
Frontier Logo
7:44 pm - 2:32 pm
BUF
-
DEN
20h 48m
1 stop
$221Frontier
Thu, Apr 2 - Wed, Apr 8
Frontier Logo
11:59 pm - 12:17 pm
DEN
-
BUF
10h 18m
1 stop
Frontier Logo
12:18 pm - 11:04 pm
BUF
-
DEN
12h 46m
1 stop
$224Frontier
Wed, Apr 15 - Sat, Apr 18
Frontier Logo
1:09 pm - 10:34 am
DEN
-
BUF
19h 25m
2 stops
Frontier Logo
1:11 pm - 10:29 pm
BUF
-
DEN
11h 18m
1 stop
$226Frontier
Booking Insights

KAYAK's insights & trends for Denver to Buffalo flights

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

What’s the cheapest day of the week to fly from Denver to Buffalo?

The average price of all round-trip flights from Denver to Buffalo clicked on KAYAK for each day over the last 12 months.

For Denver to Buffalo, Friday is the cheapest day to fly on average and Saturday is the most expensive. Flying from Buffalo back to Denver, the best deals are generally found on Friday, with Sunday being the most expensive.

What is the cheapest month to fly from Denver to Buffalo?

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

The cheapest month for flights from Denver to Buffalo is October, where tickets cost $236 (return) on average. On the other hand, the most expensive months are December and March, where the average cost of round-trip tickets is $424 and $370 respectively.

Can I save money by flying with a layover from Denver to Buffalo?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $362, prices are generally cheapest when you fly direct.

How far in advance should I book a flight from Denver to Buffalo?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Denver to Buffalo, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Denver to Buffalo, you should book around 3 weeks before departure, which saves you about 39% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.

Expert advice

Expert advice for your flight from Denver to Buffalo

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Frontier

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Blane Bachelor

Blane Bachelor

Expert on Southwest

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Good to know

Low seasonJanuary
Cheapest flight$73
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly and prices are also 4% lower on average.
Flight from Denver to Buffalo

When to book flights from Denver to Buffalo

Are your dates flexible? Find out the best times to travel from Denver to Buffalo based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Denver to Buffalo

  • How can I fly from DEN to BUF?

    There are major airlines flying direct and offering nonstop services along this route. Frontier and Southwest Airlines are some major airlines frequently operating between DEN and BUF nonstop. However, if you are traveling on a budget and want to save money, consider booking the one-stop option flights such as Delta, American and United Airlines, usually with layovers at multiple airports, including LAS, ORD and MSP.

  • Is Denver International Airport pet friendly?

    Yes, pets are welcome at Denver International Airport. There are several approved pet relief sites there. As a result, passengers traveling with dogs can benefit from these services to keep their animals comfortable after a long voyage. The pet relieving facilities provide sinks, disposable trash bags, and fire hydrants. They are located in the airport's Concourses B, A, and C. However, while at the airport, keeping your furry friends on a leash is vital unless you are using the pet relief facilities.

  • Is there parking lots at Denver International Airport?

    There are various parking lots at Denver International Airport that passengers who want to leave their cars at the airport while flying out of the city can utilize. If you are looking forward to parking long-term, you can choose to use the Mt Elbert Lot, The Economy lot, and Pikes Peak Lot. However, if you want to park for 12h or less, you can opt for the short-term parking lots located in Garage East on the arrivals level. The airport also offers complimentary shuttle services picking and dropping off passengers at these garages.

  • Are there any onsite hotels at BUF?

    There are many prestigious hotels in BUF where you can stay. Buffalo Airport Hotel and Aloft Buffalo Airport Hotel are the perfect options. These hotels are conveniently located and have first-rate amenities like plenty of parking, a fitness center, and an outdoor pool. Consider spending the night in one of these hotels if your flight is early in the morning.

  • What is the cheapest flight from Denver to Buffalo?

    In the last 3 days, the lowest price for a flight from Denver to Buffalo was $73 for a one-way ticket and $166 for a round-trip.

  • Do I need a passport to fly between Denver and Buffalo?

    A passport is not required to fly from Denver to Buffalo.

  • Which airports will I be using when flying from Denver to Buffalo?

    On your way to Buffalo, you’ll fly out from Denver Intl. You’ll be landing at Buffalo.

  • Which airlines offer Wi-Fi service onboard planes from Denver to Buffalo?

    Only JetBlue offers inflight Wi-Fi service on the Denver to Buffalo flight route.

  • Which aircraft models fly most regularly from Denver to Buffalo?

    The Boeing 737-800 is the aircraft model that flies most regularly on the Denver to Buffalo flight route.

  • Which airline alliances offer flights from Denver to Buffalo?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between Denver and Buffalo, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Denver to Buffalo?

    There are nonstop flights from Denver to Buffalo on a daily basis.

  • Which is the best airline for flights from Denver to Buffalo, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Denver to Buffalo are Southwest and Delta. With an average price for the route of $442 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $269 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Denver to Buffalo?

    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 Denver to Buffalo.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Buffalo from Denver 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 Denver to Buffalo?

    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 Buffalo with an airline and back to Denver with another airline. Booking your flights between Denver and BUF can sometimes prove cheaper using this method.

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

    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 Buffalo from Denver up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Denver to Buffalo

  • Looking for a cheap flight? 25% of our users found flights on this route for $208 or less one-way and $352 or less round-trip.
  • The Denver International Airport's (DEN) lounges are great for unwinding and finding tranquility. They are great for breakfast if you have an early morning check-in or delayed flights. Take advantage of the comfortable chairs, showers, cuisine, variety of alcoholic beverages, and Wi-Fi. No matter which airline you are flying, they are affordable and available to all travelers.
  • If you want to access DEN from downtown Denver, approximately 25 miles away, you can choose from multiple means of transport. For example, you can opt for taxis, rideshares or airport shuttle transfers. Taxis and rideshares take approximately 30min to cover this distance. However, they are a more expensive option compared to airport shuttle transfers.
  • When flying through Buffalo International Airport (BUF), there is never a shortage of things to do to pass the time before airport transfers. BUF has several amenities at the airport, including retail, free Wi-Fi, and financial services.
  • Passengers with hidden disabilities can ask for assistance and wheelchairs in both the departure and arrival airports. You should get in touch with your airline and let them know what services you require when flying through DEN. On the other side, you should also ask for wheelchairs ahead of time to prepare for your landing at BUF.
  • Passengers traveling through BUF with infants will find at least one distinctive, exceptional baby care facility near Gate 12 on the airside. These specialized nursing rooms aid children and their mothers be comfortable after the lengthy journey. Additionally, they have a variety of amenities and artwork, including power outlets, rocking chairs and baby changing tables.

Prefer to fly direct from Denver to Buffalo?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Denver Intl to Buffalo.
Find which airlines fly direct from Denver Intl Airport to Buffalo Airport, which days they fly and book direct flights.

Direct departures

Denver Intl to Buffalo

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

Southwest,United Airlines

Southwest,United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Direct returns

Buffalo to Denver Intl

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

Southwest,United Airlines

Southwest,United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Reviews of the top 5 airlines serving from Denver to Buffalo

 
See real verified KAYAK customer reviews for airlines flying from Denver to Buffalo. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Denver to Buffalo? 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 4318 reviews
8.0Comfort
8.6Crew
7.5Entertainment
8.1Boarding
7.0Food
Airline reviews

Long layover between flights to Long Island from BWI - need better coordination between flights

4.0 OkayKenny, Mar 2026
TPA - BWI
Read more Southwest reviews

Long layover between flights to Long Island from BWI - need better coordination between flights

I elected to pay for the upgrades and found very little difference

The new seating arrangement is so over priced for what you get.

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.

No food or entertainment, just a quick 40 minute flight. A little bumpy due to Santa Ana winds but pilot has no control over that. Good flight and landing!

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

I realize they are still working out kinks with the new boarding process, but by the time I boarded in group 5, most of the bins were full. All airlines should better enforce small bags and jackets going under the seats until everyone has boarded.

WiFi was not working and didn’t have a beverage service

Snacks are always pretzels. Why can't you also offer peanuts ?

Flight boarded late after announcing on time boarding. Flight arrived only a little late despite late departure. Had trouble connecting to WiFi

Cabin was not pressurized properly. Several passengers had respiratory difficulties.

The staff was fine. The plane was extremely tight, and I paid for the wifi and it did not work at all. I was actually going to ask for a refund.

Terrible. Four hour delay because Delta could not find crew to man the aircraft. Terrible communication. Terrible insight into the delays. One of the worst flight experiences I’ve had.

The crew, and fellow passengers, were super gracious and kind. There seemed to be plenty of bin space even though the plane was full. It’s nice to get a glass of wine with dinner in Premiere seating, and there was a lot of food.

Good experience and the flight landed early. There was no food I had or entertainment.

bulkhead seat had very little legroom - even in bsiness class.

This was one of the worst flights I’ve been on in years. I upgraded to comfort and had such an uncomfortable experience. The person next to me was oversized - which I understand - however, they took up their space and mine. I could only use about 50% of my seat space to not be physically touching this person the entire flight and there was no spatial awareness. I also could not use the seat outlet because their body was obstructing it. It was very inconvenient. Their body kept touching me repeatedly during the flight and I felt very uncomfortable. To pay more for an upgraded space and then not even being able to use it was highly disappointing.

Delta One is extraordinary. I fly business when somebody hires me. I just wonder why there is such a chasm between business class and the insanely inhumane and nonsensical coach. The seats are not large enough to fit even my tiny wife. We fly 10% of what we did because we don’t want to pay 5-10 k but for $400 it’s unbearable. It seems like the accountants took over and made stupid decisions. Screw in 20 extra seats and make it so unbearable that people fly 90% less. Just put the damn price up and put some proper chairs in. But business, yay.

Air travel sucks. It continues to be awful for all airlines. No shame on delta alone.

Delta canceled our flight and we had to scramble to find another airline to get home. Phoenix is not a delta hub so they didn’t have another plane. It would have been a red eye though Salt Lake City. Getting in at 5am. No bueno.

Flight left on time and we arrived 25 minutes early! There was a gate available when we arrived so early on a busy Sunday afternoon! Flight attendants came around twice with the drinks cart.

Sitting on the runway after we land for almost two hours! Not sure if we should blame United or Just Dumpy Vance.

Flight was late - I was downgraded from first class to coach

Crew seemed a bit cranky. No seatback screens. But boarding was efficient and on time and we arrived early.

See previous note about the passenger in Denver who threw my husband's bag out of the overhead bin in order to maker room for his own. And the flight attendant back up the new passenger.

Terrible. They wouldn't allow me on my flight on the 14th..

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

Electric plugs didn't work. Entertainment system wasn't working

The design of the light switch on the arm rest is ridiculous.

Our flight was delayed 3 times and this is why I am giving such low reviews. Everything else was okay but being in the airport at 4:30pm for my initial flight at 7pm to not leave until after 9:30pm is insane,

The crew was excellent and overall the flight was good. No complaints.

Good crew and flight was on time. It’s a small plane with limited overhead luggage space. They said the overhead space was full and I had to check my bag. There was still space when I got on. Waiting for my checked luggage added 30 minutes to my trip. Not the end of the world but also not great.

My seat was assigned last row behind restrooms No legroom’s I’m very Pettit Still was not comfortable Food choice was excellent

There was free WiFi (definitely a plus), but the flight was delayed 45 minutes waiting on a catering truck that never arrived. The pilot said there would be food vouchers given out at the end of the gangway to make up for the inconvenience, but there was no one offering those. Delay made me late for work!

Overall it was a good flight. Because we traveled on a Saturday we were upgraded to FC since my wife and I are both Executive Platinum. The only areas for improvement we noted are better snack assortment and perhaps a little nicer plane as American is flying some older planes now. Everything else on this flight was excellent, which is frankly not the norm for American since we have had multiple issues on prior AA flights.

The smell from the bathroom kept wafting through the cabin. It made people sick.

The seats are too uncomfortable for anyone over 5ft 8in. I'm 5'10" with a back and hip issue and I was in pai for the full duration of the flight.

Delayed an hour due to operational issues. Minimal apologies or care for the significant inconvenience caused. Landed at nearly 1am and they still couldn’t find ground staff to get us off the plane promptly.

Long delays, lack of information about the status of the flight. The flight was delayed 4 times.

There's no seats that lean back with little leg space i wad uncomfortable the entire flight. Your charges for extra baggage is despicable and costly!!

There was no food and no entertainment, so I'm not sure why these are even in the survey, as my understanding is frontier does not ever offer food without a few, not even a snack, and there are no screens so unless the flight safety talk is our entertainment why ask how we liked it?. One of the flight attendants say in the back of the plane as people filed in to their seats, yelling orders about where to put baggage and telling people to hurry up. It was the least professional experience I've ever had on a flight.

A 630departure flight Delayed 6hours! They changed my gate, I moved to the new gate. Had our flight on the screen for 12noon departure. I go get above to eat, check screen again and the flight was gone, no notice no announcement, nothing!! They sent my bag on the flight I wasn’t on, got it back to me 3days later. Thank goodness they did refund my money but I will NEVER fly them again.

Plane and crew on board were fine. Everything else was terrible.

Not clean and was told I would get a great seat and it was not great at all

Delayed. Text notifications were slow. Not much information o what was happening. Boarding was slow and confusing. Wasn’t even offered water other flight. Had to ask. No entertainment at all. Felt like.a Greyhound bus.

Frontier is the Walmart of airlines. Frontier has removed adjustability and comfort from their seats to make the flight lighter and save gas. This makes it impossible to sleep on their flights. Their customer service is abysmal. Once, I bought a drink on the plane, and they swiped my credit card on the plane to pay for it. Then I got three weeks of daily notices from my bank telling me they tried to charge the wrong card number over and over again. I tried to call them, but they removed the ability to actually talk to someone that can resolve such a problem from their company to cut corners. The only way to talk to someone in person is to go to the check-in counter at the airport (40 minutes drive from my house). Eventually their system gave up on trying to charge the card, after 21 days of repeated tries. They don't pad their prices even a little to handle customer service issues like missed flights. They also have a blanket policy preventing helping you reschedule a missed flight if their system says you "cancelled" your own flight online. This is a major problem because their website is broken on mobile devices, the only web browser you have at the airport when their gate staff tell you that you have to reschedule your own missed flight online because they can't help you. I tried to reschedule my flight on my android device and instead, their website crashed and "cancelled" my missed flight. When I got to the counter, the agent argued with me for 5 minutes insisting that I intentionally cancelled my own flight (implying I had to buy another flight). She missed the point: the problem was that I could not buy another flight because their website is broken. I left to avoid more conflict with the "customer service" agent. I tried to redress my issue with their only other "customer service" chanel available: the contact form on their website. The response I got was more of the same: you cancelled your own flight, according to our website / computer records, therefore we won't help you. I was trying to explain the problem with their broken website that cost me hundreds of dollars by crashing / malfunctioning and resulting in a cancelled flight, but they only had deaf ears for this problem. Worst customer service I have ever experienced. I will never buy another Frontier flight again, because it is a risky, painful move that I will likely regret often.

Disaster. They lied every step of the way. We ended up being delayed due to crew and then allegedly abandoned the flight because of a curfew at LGA. No rebooking to LGA at any reasonable time. No hotel. No meal vouchers. Had to sleep in the airport and fly to Newark instead. Will never fly Frontier again.

What I expected, nickeled and dined and a frontier flight attendant loudly complained about her job and lack of communication as she headed to the gate on her cell phone. Not professional.

My first flight was delayed 5 hours. The 2nd flight was canceled til the next day and the never even tried to compensate for it. Worse I was delayed again on the flight the rebooked me on.

Everything you need to know for your flight from Denver to Buffalo

Information on your arrival and departure airports