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$370+ Cheap flights from Incheon Intl (ICN) to Colorado

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — DEN
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap flight deals from Incheon Intl to Colorado

Cheapest flights from Incheon Intl to Colorado
Explore the most affordable flight options available from Incheon Intl to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

This Delta deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/188:05 pmICN - DEN
1 stop19h 16mDelta
Mon 12/295:30 amDEN - ICN
1 stop18h 50mDelta
Deal found 12/13$632
This United Airlines deal was found by Cheapflights users on 12/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/226:00 pmICN - DEN
1 stop18h 53mUnited Airlines
Mon 1/56:00 pmDEN - ICN
1 stop19h 40mUnited Airlines
Deal found 12/14$661
This United Airlines deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:00 pmICN - DEN
1 stop18h 53mUnited Airlines
Thu 1/15:45 amDEN - ICN
1 stop18h 30mUnited Airlines
Deal found 12/15$671
This Delta deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/287:40 pmICN - DEN
1 stop19h 16mDelta
Wed 1/146:23 pmDEN - ICN
2 stops30h 07mDelta
Deal found 12/15$683
This Delta deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/238:05 pmICN - DEN
2 stops30h 55mDelta
Tue 12/301:10 pmDEN - ICN
1 stop36h 25mDelta
Deal found 12/15$700
This Korean Air deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/228:05 pmICN - DEN
1 stop19h 18mKorean Air
Tue 12/306:05 amDEN - ICN
1 stop18h 25mKorean Air
Deal found 12/13$710
This United Airlines deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/216:00 pmICN - DEN
1 stop22h 26mUnited Airlines
Wed 3/187:45 amDEN - ICN
1 stop16h 30mUnited Airlines
Deal found 12/13$712
This Alaska Airlines deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/218:35 pmICN - DEN
2 stops43h 24mMultiple Airlines
Wed 3/187:00 amDEN - ICN
1 stop20h 35mMultiple Airlines
Deal found 12/13$714
This Expedia deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/208:35 pmICN - DEN
2 stops43h 24mMultiple Airlines
Tue 3/176:16 pmDEN - ICN
1 stop33h 19mMultiple Airlines
Deal found 12/13$721
This Delta deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/287:40 pmICN - DEN
1 stop19h 16mDelta
Thu 1/153:59 pmDEN - ICN
2 stops32h 31mDelta
Deal found 12/15$734

Find flight deals from Incheon Intl to Colorado

Keep the following information in mind while searching for Incheon Intl to Colorado flight deals. Data was last updated December 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$544
(United Airlines)

One-way from

$370
(Kiwi.com)

Popular in

October

Cheapest in

January

Average price

$764
Provider with most accurate pricing for Seoul (SEL)-Denver Intl flight deals.
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Provider most trusted by Cheapflights users for Seoul (SEL)-Denver Intl flights.
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From Incheon Intl to Colorado
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One-way flight from Incheon Intl to Colorado
Search Deals
Highest demand for flights based on searches. 0% potential increase in price ($8 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Incheon Intl to Colorado that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 15, 2025.
Use the filters below to find and compare flights from Incheon Intl Airport to Colorado that are best for you.

Fly from

Incheon Intl

Fly to

Colorado

Route

Depart

Return

Price

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Fri 2/6

6:00 pm-8:28 am

2 stops30h 28m

Denver Intl

Sun 2/8

7:47 am-5:40 am

1 stop29h 53m

$544

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Fri 2/6

8:35 pm-11:35 pm

1 stop19h 00m

Denver Intl

Sun 2/8

7:00 am-6:35 pm

1 stop19h 35m

$606

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Sun 2/1

8:35 pm-11:35 pm

1 stop19h 00m

Denver Intl

Sat 2/28

7:00 am-6:35 pm

1 stop19h 35m

$616

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Thu 1/29

8:05 pm-10:36 pm

2 stops18h 31m

Denver Intl

Sat 2/28

6:50 pm-4:30 pm

1 stop29h 40m

$632

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Fri 3/20

8:05 pm-11:31 pm

1 stop18h 26m

Denver Intl

Sat 3/28

4:59 pm-5:20 pm

1 stop33h 21m

$632

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Sun 2/1

8:35 pm-4:13 pm

1 stop35h 38m

Denver Intl

Fri 2/27

7:52 pm-6:35 pm

1 stop30h 43m

$632

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Thu 1/29

8:05 pm-2:50 pm

2 stops34h 45m

Denver Intl

Sun 3/1

6:20 pm-4:30 pm

2 stops30h 10m

$632

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Thu 1/29

7:30 pm-8:05 pm

1 stop16h 35m

Denver Intl

Wed 2/25

6:40 am-4:30 pm

1 stop17h 50m

$632

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Fri 1/30

8:05 pm-3:09 pm

2 stops35h 04m

Denver Intl

Sat 2/28

6:50 pm-4:30 pm

1 stop29h 40m

$632

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Thu 1/29

8:05 pm-9:38 am

2 stops29h 33m

Denver Intl

Thu 2/5

5:15 am-4:30 pm

2 stops19h 15m

$632

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/13

Showing 1-10 of 24 results
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Best time to book a flight from Incheon Intl to Colorado

Have a flexible travel schedule? Discover the best time to fly to Colorado from Incheon Intl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Incheon Intl Airport to Colorado

What is the cheapest month to book a flight from Incheon Intl Airport to Colorado?

Currently, November is the cheapest month in which you can book a flight from Incheon Intl Airport to Colorado (average of $488). Flying from Incheon Intl Airport to Colorado in February is currently the most expensive (average of $831). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ICN to CO?

Find hourly flight availability from Incheon Intl to Colorado. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 15, 2025.

It’s optimal to fly from Incheon Intl Airport to Colorado in the afternoon. By choosing this option you can save up to 20% on the cost of your flight, compared to a flight at noon.

How much does it cost to fly round-trip from Incheon Intl Airport to Colorado?

Reviews of airlines servicing Colorado

Get insights into the airlines that provide service to Colorado. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Colorado. Reviews last updated December 15, 2025.
Peruse reviews from past customers who have flown with Korean Air, Asiana Airlines, and Delta from Incheon Intl Airport to Colorado to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,186 reviews

Comfort

8.3

Crew

8.7

Boarding

8.5

Overall

8.4

Food

8.1

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Korean Air
8.4
Very good
1,186 reviews
Korean Air
8.4
Very good
1,186 reviews

Comfort

8.3

Crew

8.7

Boarding

8.5

Overall

8.4

Food

8.1

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Asiana Airlines
8.2
Very good
493 reviews
Korean Air
8.4
Very good
1,186 reviews

Comfort

8.3

Crew

8.7

Boarding

8.5

Overall

8.4

Food

8.1

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Delta
7.9
Good
8,010 reviews
Korean Air
8.4
Very good
1,186 reviews

Comfort

8.3

Crew

8.7

Boarding

8.5

Overall

8.4

Food

8.1

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
United Airlines
7.4
Good
9,093 reviews
Korean Air
8.4
Very good
1,186 reviews

Comfort

8.3

Crew

8.7

Boarding

8.5

Overall

8.4

Food

8.1

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
American Airlines
7.2
Good
11,048 reviews
Korean Air
8.4
Very good
1,186 reviews

Comfort

8.3

Crew

8.7

Boarding

8.5

Overall

8.4

Food

8.1

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!

Related info for your journey

Find useful and relevant information for your journey from Incheon Intl to Colorado. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Incheon Intl Airport to Colorado?

    United Airlines can get you from Incheon Intl Airport to Colorado in just under 30h 28m. Your travel time can differ by up to . Airlines will cover a distance of 6186 mi.

  • What are the cheapest airlines to fly from Incheon Intl Airport to Colorado one-way?

    The cheapest airline one-way is Air Canada, with whom users have recently found tickets for as low as $356. However, be on the lookout for offers from Korean Air and United Airlines, as they are both options that can get you from Incheon Intl Airport to Colorado for a low price.

  • Can I find deals for flights from Incheon Intl to Colorado that include hotel bookings?

    Yes. In addition to deals on Incheon Intl to Colorado flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Incheon Intl to Colorado?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Incheon Intl to Colorado.

  • Can I find deals for business class flights from Incheon Intl to Colorado?

    Yes. Cheapflights offers flight deals from Incheon Intl to Colorado by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Incheon Intl Airport to Colorado?

    Currently, November is the cheapest month in which you can book a flight from Incheon Intl Airport to Colorado (average of $488). Flying from Incheon Intl Airport to Colorado in February is currently the most expensive (average of $831). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Alternative routes for Incheon Intl to Colorado

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Incheon Intl to Colorado

Discover the top 6 airlines that operate flights from Incheon Intl to Colorado. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$589Average$863FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$601Average$686FlexibilityNo cancel feeOn-time67%
DeltaCheapest$620Average$906FlexibilityNo cancel feeOn-timeN/A
Asiana AirlinesCheapest$688Average$891FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$695Average$798FlexibilityNo cancel feeOn-time81%
American AirlinesCheapest$695Average$819FlexibilityNo cancel feeOn-time71%

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