$402 Find Cheap Flights from Seoul Incheon Airport 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 Incheon Intl to Colorado departing on 4/28. 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 Colorado

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

Book Cheap Incheon Intl to Colorado Plane Tickets

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

Mon, Apr 27 - Mon, May 4
Alaska Airlines Logo
7:35 pm - 11:59 pm
ICN
-
DEN
19h 24m
2 stops
Alaska Airlines Logo
8:00 am - 5:30 pm
DEN
-
ICN
18h 30m
1 stop
$646Alaska Airlines
Mon, Apr 27 - Fri, May 1
Alaska Airlines Logo
7:35 pm - 11:59 pm
ICN
-
DEN
19h 24m
1 stop
Alaska Airlines Logo
6:00 am - 5:30 pm
DEN
-
ICN
20h 30m
1 stop
$678Alaska Airlines
Fri, May 1 - Sat, May 9
Alaska Airlines Logo
7:35 pm - 11:59 pm
ICN
-
DEN
19h 24m
1 stop
Alaska Airlines Logo
8:00 am - 5:30 pm
DEN
-
ICN
18h 30m
1 stop
$684Alaska Airlines
Tue, Apr 28 - Mon, May 4
American Airlines Logo
5:50 pm - 8:26 am
ICN
-
DEN
29h 36m
1 stop
American Airlines Logo
9:18 am - 3:45 pm
DEN
-
ICN
39h 27m
1 stop
$757American Airlines
Mon, Mar 16 - Wed, Mar 18
American Airlines Logo
5:55 pm - 11:36 am
ICN
-
DEN
32h 41m
1 stop
American Airlines Logo
9:10 am - 3:55 pm
DEN
-
ICN
39h 45m
1 stop
$765American Airlines
Mon, Apr 27 - Mon, May 4
Multiple Airlines Logo
1:00 pm - 6:16 pm
ICN
-
DEN
20h 16m
1 stop
Multiple Airlines Logo
6:00 am - 3:50 pm
DEN
-
ICN
18h 50m
1 stop
$780Multiple Airlines
Tue, Apr 28 - Mon, May 4
Multiple Airlines Logo
1:00 pm - 7:49 pm
ICN
-
DEN
21h 49m
1 stop
Multiple Airlines Logo
6:00 am - 3:50 pm
DEN
-
ICN
18h 50m
1 stop
$781Multiple Airlines
Tue, Apr 28 - Mon, May 4
Multiple Airlines Logo
7:00 pm - 10:59 pm
ICN
-
DEN
18h 59m
1 stop
Multiple Airlines Logo
7:15 am - 4:40 pm
DEN
-
ICN
18h 25m
1 stop
$785Multiple Airlines
Tue, Apr 28 - Mon, May 4
Multiple Airlines Logo
1:00 pm - 7:49 pm
ICN
-
DEN
21h 49m
1 stop
Multiple Airlines Logo
6:00 am - 3:50 pm
DEN
-
ICN
18h 50m
1 stop
$788Multiple Airlines
Sun, May 3 - Thu, May 14
Multiple Airlines Logo
7:35 pm - 10:59 pm
ICN
-
DEN
18h 24m
1 stop
Multiple Airlines Logo
7:15 am - 5:30 pm
DEN
-
ICN
19h 15m
1 stop
$795Multiple Airlines
Booking Insights

KAYAK's insights & trends for Incheon Intl to Colorado flights

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

How much is a round-trip flight from Incheon Intl Airport to Colorado?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Incheon Intl Airport to Colorado departing in April.

What is the cheapest month to fly from Incheon Intl Airport to Colorado?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Incheon Intl Airport 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 Incheon Intl Airport to Colorado is January, when tickets cost $680 (return) on average. On the other hand, the most expensive months are February and July, when the average cost of round-trip tickets is $1,318 and $1,148 respectively.

How far in advance should I book a flight from Incheon Intl Airport 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 Incheon Intl Airport 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 Incheon Intl Airport to Colorado, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 20 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$402
Best time to beat the crowds with an average 23% drop in price.
Most popular time to fly with an average 8% increase in price.
Flight from Incheon to Denver

FAQs - booking Colorado flights

  • How does KAYAK find such low prices on flights from Seoul Incheon Airport 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 Seoul Incheon Airport to Colorado.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Seoul Incheon Airport 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 Seoul Incheon Airport 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 Seoul Incheon Airport 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 Seoul Incheon Airport 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 Seoul Incheon Airport to Colorado up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from Incheon Intl to Colorado

 
See real verified KAYAK customer reviews for airlines flying from Incheon 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 Incheon Intl 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.
8.4
Korean AirOverall score based on 1195 reviews
8.1Food
8.7Crew
8.2Entertainment
8.3Comfort
8.5Boarding
Airline reviews

Great service and comfort level. You can have more of vegetarian food options.

10.0 ExcellentAnonymous, Nov 2025
ICN - SFO
Read more Korean Air reviews

Great service and comfort level. You can have more of vegetarian food options.

It’s great, long flight and arrive safe at destination

Everything was excellent as I expected. They also had a very caring crew. I had a headache and asked a Tylenol. The crew members kept checking with me how I was doing.

I can't believe they put my wife and I in the two middle seats! It is a very long flight and we had single flyers on either side of us blocking the way to the bathroom! There's no reason to not give one of us the isle seat so we could have managed bathroom needs and snacks with convenience. So I think very poorly of Korean air to put us both in the middle, I've never had that happen before and will probably avoid this airline in the future because of this. We tried to have them change it but they didn't so you pretty much lost a customer because of it.

There could have been better spacing of the passengers, it was crowded in some parts of the plane then other while rows were empty

Plane took off on time and I had the whole row to myself!

One of the flight attendants stepped on my foot. I was on the aisle seat. A lady inside needed to get out. So Instood. Just then, a flight attentendant came wuicklybtheoughbthe aisle and stepprd on my sock covered toes. I let out a small sound. She stopped momentarily, but didn’t ask how I was just took off of the aisle. Never came back to see how I was. Fortunately, I was not really hurt other than a slight soreness in my toes. But I found that to be very negligent.

This flight was a superior flight in all regards. Extremely pleasant experience.

Korean Air is unlike any other major airline I have flown with. The grace and respect that the staff has from check in to de-boarding is unmatched. The flight attendants this time were especially wonderful to my five little children. They helped us rearrange to more suitable seating, brought our children’s meals, and patiently waited for them in the aisles when they had to use the bathroom. We felt so welcome and comfortable. I really appreciate the meal voucher when our flight was delayed. I am grateful to have had such an stress-free experience.

It's good overall. Flight was packed. Inflight entertainment choices were lacking.

I am thankful that I was able to fly using Asiana

The customer service was excellent. They noticed that our connecting flight was scheduled too closely for us to complete customs, so they changed the flight. Our initial flight was delayed, and they were able to get us on another flight, all without charging us any additional fees. I would fly them again anytime!

Better screens, it would have been nice to have more comfortable seats.

It was great, but my bag was not loaded onto the connecting flight. I'm currently getting it resolved. If this isn't a problem, everything else was excellent.

Very clean ,flight attendants very professional,nice , Boarding was very easy

The aircraft was massive (A-380) and became crowded with 400+ passengers on board.

Coming back to America was a peaceful flight everyone and everything was perfect

The staff was courteous and the flight was very smooth. It was so nice to see the captain greeting the passengers at the end of the flights.

The beefsteak on the lunch menu was excellent! I usually do not eat airplane food. I loved it.

Flight was too cold. I wore a regular cotton tee and it wasn’t enough. It was a night time flight so I would have thought a blanket would be provided to passengers. A 4 hour flight and no options for a meal? I flew Asiana the next day from Seoul to Manilla. Same duration, 4 hours. They give everyone a pillow and blanket and serve a meal. Why is United so cheap and holding back meals and amenities? Also, they promote too much gay stuff and DEI in their advertisements. Please be mindful of other beliefs and don’t shove your gay ideology down my throat.

alike schedule and times it’s very good for me, I will stay wad delta for ever

Everything was good except wifi and a leaking drink chiller. The floor was all wet and my bag was soaked. Did not notice until debarking. Have not heard back from Delta. Even though this was leg one of an international flight in first class, they denied access to their Sky Club - very disappointing!

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.

two hour delay and the Delta representative on the PA system was unable to understand

An awesome flight crew. FC seat cushion just doesn’t cut it for a 3+ hour flight.

2+hrs delay without any reason provided and a cramped flight

We waited an hour on the runway to get a gate in Orlando

Flight was delayed by 3-hours and their fix was… complimentary pretzels.

Flight was delayed due to crew being not on time

Flight crew issues delayed my flight by 2 1/2 hours. Causing me to miss my connection.

We got delayed three hours and nobody thought to have the bathroom fixed while we were sitting waiting to board? took a full hour to have maintenance come and check it off. Had to shut the bathroom down twice so that the pilots could go to the bathroom. Everyone missed their connections.

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

As great a red-eye flight as red-eye flights can be.

Both of my flights arrived early and check in process was smooth

Everything was on time Will use united again for sure

I just think it’s unfortunate that Airlines have completely abandoned the idea of serving any kind of decent or even real food on flights, not even on a four hour flight!? Those days are gone, I guess.

The flight was delayed by two de-icings. The seatbelt did not work correctly. It did not stay tight.

Hotter than Hades in August. Why, why do crews think that in the winter when we are already dressed for cold weather we need a cabin that is 82 degrees. Even the vents were blowing hot air.

Flight was delayed. De-icing took a while. When we landed had to wait for another plane to vacate our gate. Just an overall bad experience.

Not good - outbound flight was delayed and missed my connection even though I got to the gate after running through the airport - the agent would not let me on because the door was closed (flight had not left). There was no notification from United - overall experience was very disappointing. Additionally, I was downgraded from first class to coach on the alternative flight

My experience was good with United too But only not so good thing was that at Calgary airport I was not given lounge access despite of flying business. Aspire lounge denied it to me, which was unfair I feel

We left over 2 hours late and they didn't even give us a complimentary snack, when getting to the desk I asked if I could be put in a row with only 1 other person or an empt y one I was told the flight was full when the last two rows were empty. All around over it

they were super helpful. Agents at the desk got me on an earlier flight and I was able to get home several hours earlier.

This is a great non-stop YVR-MIA. Very comfortable plane, and no transfer through a city that gets major winter weather!

Terrible…. Reported missing luggage’s with injectable meds that needed refrigeration. Yet, delivery could not be expedited. Luggage’s were delivered 5 days after arrival. The meds were useless as ice pack had melted. So disappointed!!!

Wifi was great. Kind air crew and comfortable seating. Also liked the entertainment options.

I did not noticed baggage was separate - I had assumed international flights included luggage, so it surprised me I had to pay to check a bag.

In a nutshell, my bag, the one I have to pay for, because now you can’t even bring a carry on, did not make it. I am still waiting for an update. The fact that not only were have to pay for it, but on top of that we are stuck without getting it, it’s ridiculous..

flight landed late almost 1.00hr and we 4 passengers missed our connected flight to indianapolis, we need to get the hotel and taxi for the next day flight to home in indianapolis, cost us $ 300 more

The service was good ... I wondered if the stewardess was OK though as she seemed quite sad.

Everything you need to know for your flight from Incheon Intl to Colorado

Information on your arrival and departure airports