$158 Find Cheap Flights from Duluth to Colorado

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Duluth to Colorado departing on 7/1. 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

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Duluth to Colorado, 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 Duluth to Colorado, as well as popular online travel agencies
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Best Colorado Flight Deals from Duluth

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Denver
Denver1 stop$328
Denver
Denver1 stop$328

Cheap Flights from Duluth to Colorado

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

Wed, Jul 2 - Wed, Jul 9
Delta Logo
5:15 am - 8:16 amDLH-DEN
4h 01m1 stop
Delta Logo
9:15 am - 3:21 pmDEN-DLH
5h 06m1 stop
$328Delta
Find Deal
Tue, Jul 1 - Wed, Jul 9
Delta Logo
5:15 am - 8:16 amDLH-DEN
4h 01m1 stop
Delta Logo
9:15 am - 3:21 pmDEN-DLH
5h 06m1 stop
$357Delta
Find Deal
Wed, Jul 2 - Tue, Jul 8
Delta Logo
5:15 am - 8:16 amDLH-DEN
4h 01m1 stop
Delta Logo
7:14 pm - 10:23 amDEN-DLH
14h 09m1 stop
$367Delta
Find Deal
Wed, Jul 2 - Thu, Jul 10
United Airlines Logo
6:13 pm - 11:22 pmDLH-DEN
6h 09m1 stop
United Airlines Logo
2:44 pm - 10:00 pmDEN-DLH
6h 16m1 stop
$387United Airlines
Find Deal
Tue, Jul 1 - Tue, Jul 8
Delta Logo
5:15 am - 8:16 amDLH-DEN
4h 01m1 stop
Delta Logo
7:14 pm - 3:21 pmDEN-DLH
19h 07m1 stop
$396Delta
Find Deal
Tue, Jul 1 - Fri, Jul 4
Delta Logo
5:15 am - 8:16 amDLH-DEN
4h 01m1 stop
Delta Logo
11:03 am - 5:39 pmDEN-DLH
5h 36m1 stop
$401Delta
Find Deal
Thu, Jul 17 - Sun, Jul 20
Delta Logo
6:03 pm - 11:28 pmDLH-DEN
6h 25m1 stop
Delta Logo
6:35 am - 10:44 pmDEN-DLH
15h 09m1 stop
$407Delta
Find Deal
Wed, Jul 2 - Tue, Jul 8
Delta Logo
5:15 am - 8:16 amDLH-DEN
4h 01m1 stop
Delta Logo
12:30 pm - 10:23 amDEN-DLH
20h 53m2 stops
$414Delta
Find Deal
Wed, Jul 30 - Wed, Aug 6
United Airlines Logo
6:13 pm - 11:22 pmDLH-DEN
6h 09m1 stop
United Airlines Logo
6:00 am - 10:00 pmDEN-DLH
15h 00m1 stop
$428United Airlines
Find Deal
Wed, Aug 13 - Fri, Aug 15
Delta Logo
7:50 am - 12:47 pmDLH-DEN
5h 57m1 stop
Delta Logo
4:00 pm - 10:44 pmDEN-DLH
5h 44m1 stop
$437Delta
Find Deal
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KAYAK's insights & trends for Duluth to Colorado flights

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

What is the cheapest month to fly from Duluth to Colorado?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Duluth to Colorado, 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 Duluth to Colorado is November, when tickets cost $259 (return) on average. On the other hand, the most expensive months are December and July, when the average cost of round-trip tickets is $445 and $413 respectively.

What’s the cheapest day of the week to fly from Duluth to Colorado?

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

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

How far in advance should I book a flight from Duluth to Colorado?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Duluth to Colorado, 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 Duluth to Colorado, you should book around 8 weeks before departure. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.


Good to know

Low seasonFebruary
High seasonJuly
Cheapest flight$158
Best time to beat the crowds but there is an average 16% increase in price.
Most popular time to fly with an average 18% increase in price.
Flight from Duluth to Denver

FAQs - booking Colorado flights

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

    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 Duluth to Colorado.

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

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

    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 Duluth to Colorado 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 Duluth to Colorado?

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

  • What is the cheapest time of day to fly to Colorado?

    The cheapest time of day to fly to Colorado is generally at night, when round-trip flights cost $241 on average. Morning departures are around 12% more expensive than evening flights, on average. The most expensive time of day to fly to Colorado is generally in the morning, which is peak travel time and where the average cost of a ticket is $383.

Top 3 airlines serving from Duluth to Colorado

 
See real verified KAYAK customer reviews for airlines flying from Duluth to Colorado. 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 Duluth to Colorado? 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
DeltaOverall score based on 7963 reviews
7.9Comfort
7.3Food
8.5Crew
7.9Entertainment
8.2Boarding
Airline reviews

The flight was scheduled for 2:30 PM. Early in the morning we got a text message saying the flight was delayed and rescheduled for 3:00 PM. We got to the airport with that in mind. Then we got a message during check-in at the flight was rescheduled again for 2:30 PM. We almost missed our flight. In fact, our bags Were told that they would not make it. At the end, everything worked out. But it is very stressful.

4.0 OkayKoonj, Jun 2025MSP - AUS
Read more Delta reviews

The flight was scheduled for 2:30 PM. Early in the morning we got a text message saying the flight was delayed and rescheduled for 3:00 PM. We got to the airport with that in mind. Then we got a message during check-in at the flight was rescheduled again for 2:30 PM. We almost missed our flight. In fact, our bags Were told that they would not make it. At the end, everything worked out. But it is very stressful.

Most aspects were good however if they assign boarding zones they ought to enforce them or why bother? My luggage from SAN-JFK-MAD was lost in NY so I without my main bag for two days upon arrival in Spain. They were helpful in tracking it and eventually delivered it to my hotel. The flub was because of a delay upon arrival in NYC. I had booked 2 1/2 hours between flights but we had to hold on the taxiway for an hour after landing while waiting for a clear gate which likely caused the baggage error.

Excellent check-in. Crew was good. Excellent communication from flight deck.

Great overall. There was a bit of turbulence so they could only serve water because too much turbulence for the carts. Was glad they prioritized safety though

Excellent flight, the planes were newer, they did a nice job with boarding, great service overall.

Great service. Flight was delayed while we sat on the runway for a couple of hours. Weather related. Staff made is very bearable. The steward servicing the first class cabin was exceptional. Thank you! 💗

5 hours of delay that could've been much shorter if Delta had taken the 1 hour delay they imposed on the flight before boarding to run any of the plane checks required for flight to find the hydraulic issue that required nearly 3 hours to fix. $24 of meal credit buys a sandwich and a soft drink. Poor communication within the terminal about what gate we'd be re-boarding from and when we'd be re-boarding.

Amazing flight! I have never noticed the uniforms of the attendants before in twenty years of flying except today when one female had the most amazing dress on. It was beautifully designed and showed she was in charge. I never dreamed I would google who designed Delta uniforms . The ultimate compliment is when another woman admires your outfit. . I hope your designer puts it on the market

My flight was 6 pm 6/6. Every hour they delayed it again - air condition issues then no pilot then the crew had worked too many hours and cancelled the flight at 11 pm. Sent customers to NJ a 45 minutes uber ride to a hotel. Had to be back by 5 am for a 7 am flight and again no pilot etc with another three hours of delays.

I always fly Delta main cabin and pay to upgrade my seat to preferred/extra leg room. However this time even with the buying the upgraded seat I was extremely cramped with very little legroom and unable to move comfortably. For some reason meal service was very early in the flight and my row seemed to have been skipped. Most of my attendant calls were unanswered. I was unable to get extra water, or crackers/snacks to make up for my missed meal. I always carry protein bars in my personal bag, but with no extra legroom I wasn’t able to access from underseat in front of me. I am unable to sleep while flying so I read and count on in flight entertainment. However the passenger in front of me reclined their seat fully preventing me from being able to view the screen or be able to rest my book on tray table to read. One of the first times I’ve been completely disappointed in Delta. I fly internationally 2-3 times a year.

I was supposed to be on business class at first class from Denver back to Miami due to weather changes. I missed my connection and it’s put on a flight to Fort Lauderdale. Instead of honoring my business class/1st class ticket, they put me in coach, but there were two first class seats open. I think it’s absolutely disgusting that I paid for first class $1300 ticket and they put me in economy and they had to open seats available and I have still not been refunded the difference. I ended up having to eat a snack box instead of the meal I was supposed to get and did not get home till 2 AM so I think that’s a little pathetic that I had to live off crackers for dinner And my poor dog ate some cheese and salami. Oh yes, apparently when they switched me to the new flight they forgot to mention I had a service dog

Excellent service despite turbulence during the flight. Flight attendants were remarkable!

Flight attendant moved my bag without notifying me and was rude to me when I asked him about it. There was no reason to move it.

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

Food choices were very limited. Taste of the dishes was average.

I liked all the informational texts. I always knew where to go and when .

Received an email the night before showing that there would be seatback entertainment on our flight. We get on and there was no seatback entertainment. And then it was a scramble to try to set up the iPads for the kids before takeoff so they could watch something for the four hour flight.

The aircrew was solid, the flight was chill, I had no issues. The gate agent was not the best. I was trying to use a military bag upgrade to move my bag from under the seat to the overhead bins and he told me there’s no overhead bins on the plane, argued with me why booking put a military member in basic economy (I don’t really understand this) and made it an issue to even try to help me stating I’d have to call reservations to get a bag upgrade. When every other agent with United can add it at the gate, this man couldn’t be bothered.

The reason I don’t fly United. No in seat entertainment for a long flight and inconsistent WiFi and entertainment available from my device.

It was a good flight. Nothing comes to mind about how it could have been better. It was a newer plane, seemed like a great upgrade from your older ones. Staff was very good as well.

The assistance with the wheel chairs was fabulous. All the people were so very friendly and helpful. I want to thank them all.

We almost missed our return flight. We got to the gate one minute from closing the cabin door, and the agent got us aboard the plane! We are so very grateful!!!!!

Boarded flight, issues with the place and had to get off the plane, wait, and then board a different plane at a different gate. This impacted my short trip negatively. A worker died outside of the plane window and we sat there the entire time while they tried to revive him, unsuccessfully, which was traumatic.

Flight was delayed in phoenix by 1 hour. When Kenny got to minneapolis st paul, Kenny missed his connecting flight to Duluth on Sun country air. Sun country customer service did nothing to help Kenny get home to Duluth. We will not fly with sun country ever again.

When we landed in Minneapolis from Providence, the ground crew was unable to move the jet bridge to meet our plane because the wheels were frozen. We waited patiently on the plane for about 45 minutes while they tried to solve this problem. It was mind boggling that this would not be more quickly resolved, or anticipated, in a place where sever winter weather is the norm. We stressed about meeting our connecting flight to Portland, which we assumed would be our only option for that day. Fortunately, when we finally raced from our gate to the next one, that Sun Country flight had been delayed so we didn't miss it. We decided not to take anything but direct flights from now on, no matter how much cheaper.

No line to check my bag. Reasonable overweight fee. When the connection was late due to weather, the gate agent opened the door and let me on the second flight. The plane waited for my luggage transfer. My bag arrived on time at my final destination:)

I had paid for a seat assignment at the time of reservation but when I checked in the night before it wasn’t there. Had to purchase another seat.

So unprofessional. They changed my connecting flight to a time that made it literally impossible to make the flight with no way to contact them or reject the changes. When I missed the flight as expected, there was no one to be found at their ticketing counter and the phone support put me on hold for an indefinite time. Since they didn't have another flight that day, all sun country air personell had left the airport (this was at 7pm) and my only options were to get a hotel for the night and come back the next afternoon to hopefully get rescheduled or buy a flight with another airline.

I purchased an aisle seat but was put in the middle seat surrounded by families with small sick children (3). That can happen anytime and I was prepared. The ticket agent questioned why I hadn’t paid for my luggage and had to explain that 2 pieces were included with my ticket. I hate that nickel and diming attitude. Please inform your staff better.

I know the airline has been open for 40 years and the flight crew looked just as old. The flight attendants were not friendly and rude. They should think of retiring this crew.

Everything you need to know for your flight from Duluth to Colorado

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