$108 Find Cheap Flights from Colorado to New Hampshire

1 adult
1 adult, Economy

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

Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 20% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Useful Info
Useful Info

Good to know

Low seasonJanuary
High seasonJuly
Cheapest flight$108
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly with an average 5% increase in price.
Flight from Denver to Boston

FAQs for booking flights from Colorado to New Hampshire

  • How does KAYAK find such low prices on flights from Colorado to New Hampshire?

    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 Colorado to New Hampshire.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Colorado to New Hampshire 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 Colorado to New Hampshire?

    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 from Colorado to New Hampshire with an airline and back with another airline.

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

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

  • What is the cheapest day to fly to New Hampshire?

    Based on KAYAK data, the cheapest day to fly to New Hampshire is Wednesday where round-trip tickets can be as cheap as $301. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $382 on average.

  • What is the cheapest time of day to fly to New Hampshire?

    The cheapest time of day to fly to New Hampshire is generally at night, when round-trip flights cost $273 on average. Morning departures are around 4% more expensive than evening flights, on average. The most expensive time of day to fly to New Hampshire is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $406.

  • What is the cheapest month to fly from Colorado to New Hampshire?

    The cheapest month for flights from Colorado to New Hampshire is August, when tickets cost $378 (return) on average. On the other hand, the most expensive months are December and March, when the average cost of round-trip tickets is $551 and $546 respectively.

  • How far in advance should I book a flight from Colorado to New Hampshire?

    To get a below average price on the flight from Colorado to New Hampshire, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.

  • How long is the flight to New Hampshire?

    An average nonstop flight from Colorado to New Hampshire takes 9h 17m, covering a distance of 1854 miles. The shortest route is Denver (DEN) to Portland (PWM) with an average flight time of 3h 43m.

  • What are the most popular destinations in New Hampshire?

    Based on KAYAK flight searches, the most popular destination is Boston (70% of total searches to New Hampshire). The next most popular destinations are Portland (28%) and Manchester (2%). Searches for flights to Worcester (0%) and to Lebanon (0%) are also popular.

Top 3 airlines serving from Colorado to New Hampshire

 
Need help choosing which airline to fly with from Colorado to New Hampshire? 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 4287 reviews
7.6Entertainment
8.6Crew
8.0Comfort
8.2Boarding
7.1Food
Airline reviews

Southwest is typically delayed, and it gets wearisome. It is no longer a discount airline and you get way less than you pay for when it comes to comfort and Ce.

6.0 GoodDavid, Jun 2025BWI - COS
Read more Southwest reviews

Southwest is typically delayed, and it gets wearisome. It is no longer a discount airline and you get way less than you pay for when it comes to comfort and Ce.

We sat on the plane on the tarmac for 4 hours.

I'm not a fan of Southwest's model. I don't like the herding style of boarding.

Flight crew and cabin crew were great. I had to rearrange flights because my original flight was 3hrs delayed for weather, the rub is the flight I moved to boarded on time then we sat at the gate for 2 hours because scheduling stole our first officer for another flight, TWICE. Then our actual FO was an hour delayed. To make it worse my original flight went from a 3 hour delay to departing 15min EARLY. Just poor scheduling operations all around.

Bring back peanuts Take our drink orders when were all seated, especially after you switch to assigned seating.

Staff was far less than helpful at all times. Departure and arrival times mean nothing to Southwest. Extremely disappointed, will never fly with them again, and I’ll be sure to share my experience with all.

It is southwest seat was ok. Not the most comfortable seat

I’ve always loved Southwest. No issues at all. I was flying standby and the gate agent was extremely friendly and helpful. Boarding was smooth and I was able to get a window seat in the emergency exit row. Crew was fantastic! They were very professional and accommodating. We had to divert from our destination due to weather but the flight crew kept everyone at ease and informed us of all pertinent information. Excellent flight

The price of the tickets isn't matching the flight experience. No matter how long the flight is, you're only getting pretzels. The flight attendants looked unkept and over it.

Plz don't take away free bags and free seating

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.

The gate attendant let me walk right by her with a bag too big for the overhead compartment

Overall poor for me I paid extra for seats with leg room and my regional flights exit row seats have less leg room then the others that's money that could have been saved and on my final flight home the flights air was not operating it was unbearably hot in the cabin I will be contacting United and filing a DOT complaint

I don’t understand the purpose of the orange “priority” tag on my bag. This tagged, my bag is last or near to the last bag to come down the carousel at IAH.

Overall, it was a good experience. Boarding was good and there was plenty of overhead bin space for everyone’s carryons (even when we boarded toward the end). Only improvement would be to offer trash service more regularly.

David went above and beyond to make our flight the best that it could be

No food service almost missed because of first flight delays

It was one of my worst flight ever. First they were changing the gate for at least 4 times, changing from gate D7 to D12 to D44. Considering the size of the Miami Airport, we are talking about long distance and the train at the airport was not working. Then the flight was delayed around one hour. Then finally we boarded into the plane and when everybody was seated, there was an announcement that there is an issue with one of the tire of the plane, so we all had to get out of the plane with our belongings, to replace the tire. So we had around 2.5-hour delay

Most miserable flight ever. We waited almost 2 hours on the runway because the flight was oversold. American offered $1200 credit. Then there was some nonsense about weight distribution. Ridiculous. No food for 8 plus hours on the flight. I will be writing a letter.

Honestly, I haven’t flown American in years, probably due to the pandemic and my being unable to travel for certain periods in the last two years, but it was a good experience to dig out or obtain a new American Airlines account after many years of traveling for business with American in the past.

The plane was probably full boarding was easy. We were able to check our carry-on luggage for free. It was a return flight through Philly to LA. Never saw a stewardess do a demonstration of emergency Procedures. I think my flight was pretty full

Plane, flight, crew, captain were all great. The first flight had a Chipotle box lunch...delicious.

Plane, flight, crew, captain were all great. The first flight had a Chipotle box lunch...delicious. this return flight not as tasty, but filling.

The flight was 2 hour delayed, otherwise everything was excellent. The delay was due to the hourly limit requirement so given that as a reason, I'm happy with the flight!

Weather delay for 2.5 hours followed by half hour crew delay, did not have ginger ale, uncomfortable seats

So awful Unreliable Unfriendly Bad Mad Mean Smelly Hot Late Overbooked Understaffed Expensive Cramped Narcs If they were a fruit they’d be rotten durian

It’s a great flight. Service is good. Staff is awesome.

Book cheap flights from Colorado to New Hampshire

Recent round-trip flight deals

8/26Tue
1 stopAmerican Airlines
6h 51mCOS-BOS
9/3Wed
1 stopAmerican Airlines
6h 48mBOS-COS
$197
8/26Tue
1 stopAmerican Airlines
8h 35mCOS-BOS
9/3Wed
2 stopsAmerican Airlines
9h 01mBOS-COS
$202
7/10Thu
nonstopDelta
4h 01mDEN-BOS
7/15Tue
nonstopDelta
4h 39mBOS-DEN
$217
8/17Sun
1 stopFrontier
11h 43mDEN-BOS
8/21Thu
1 stopFrontier
12h 34mBOS-DEN
$221
9/4Thu
1 stopFrontier
22h 50mDEN-BOS
9/7Sun
1 stopFrontier
12h 58mBOS-DEN
$226
9/3Wed
nonstopDelta
4h 04mDEN-BOS
9/13Sat
nonstopDelta
4h 49mBOS-DEN
$227
7/8Tue
1 stopSouthwest
7h 55mDEN-BOS
7/17Thu
nonstopSouthwest
4h 30mBOS-DEN
$247
9/10Wed
nonstopSouthwest
3h 55mDEN-BOS
9/15Mon
1 stopSouthwest
8h 15mBOS-DEN
$252
8/10Sun
nonstopUnited Airlines
4h 02mDEN-BOS
8/20Wed
1 stopUnited Airlines
10h 09mBOS-DEN
$303
9/1Mon
nonstopUnited Airlines
4h 00mDEN-BOS
9/12Fri
nonstopUnited Airlines
4h 35mBOS-DEN
$307

Search by stops

Search by airline

Search by price

Recent one-way flight deals

7/24Thu
nonstopSouthwest
4h 00mDEN-BOS
$108
7/1Tue
1 stopSouthwest
8h 40mCOS-BOS
$109
8/31Sun
1 stopUnited Airlines
6h 26mCOS-PWM
$109
7/19Sat
nonstopJetBlue
3h 56mDEN-BOS
$109
7/1Tue
2 stopsAmerican Airlines
8h 02mCOS-BOS
$114
9/17Wed
nonstopUnited Airlines
4h 00mDEN-BOS
$114
8/2Sat
1 stopHawaiian Airlines
9h 01mDEN-BOS
$118
7/12Sat
1 stopAmerican Airlines
7h 46mDEN-BOS
$119
9/5Fri
1 stopAmerican Airlines
6h 39mCOS-BOS
$121
7/29Tue
1 stopJetBlue
10h 02mDEN-MHT
$122

Search by stops

Search by airline

Search by price

Last minute flights from Colorado to New Hampshire

Last minute flight, train and bus deals

6/13Fri
multi-stopAmerican Airlines
9h 09mDEN-PWM
6/16Mon
multi-stopAmerican Airlines
7h 11mPWM-DEN
$279
6/16Mon
multi-stopAmerican Airlines
9h 37mDEN-PWM
6/19Thu
multi-stopAmerican Airlines
7h 11mPWM-DEN
$284
6/14Sat
multi-stopFrontier
22h 45mDEN-BOS
9/1Mon
multi-stopFrontier
14h 03mBOS-DEN
$329
6/14Sat
nonstopDelta
4h 10mDEN-BOS
9/2Tue
nonstopDelta
4h 41mBOS-DEN
$335
6/14Sat
nonstopDelta
4h 10mDEN-BOS
9/3Wed
nonstopDelta
4h 41mBOS-DEN
$340
6/13Fri
multi-stopSouthwest
6h 40mDEN-BOS
9/2Tue
multi-stopSouthwest
7h 15mBOS-DEN
$355
6/14Sat
multi-stopFrontier
6h 36mDEN-BOS
9/1Mon
multi-stopFrontier
10h 38mBOS-DEN
$372
6/17Tue
multi-stopSouthwest
7h 15mDEN-BOS
6/20Fri
nonstopSouthwest
4h 30mBOS-DEN
$387
6/15Sun
nonstopUnited Airlines
4h 02mDEN-BOS
9/1Mon
nonstopUnited Airlines
4h 34mBOS-DEN
$392
6/15Sun
nonstopUnited Airlines
4h 02mDEN-BOS
9/2Tue
multi-stopUnited Airlines
8h 54mBOS-DEN
$402

Search by stops

Search by airline

Search by price

Everything you need to know for your flight to New Hampshire

Cabin class types available on flights to Colorado

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

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.