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$382+ Cheap flights from Seoul (SEL) 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 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEL — DEN
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap flight deals from Seoul to Colorado

Keep the following information in mind while searching for Seoul to Colorado flight deals. Data was last updated October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$589
(American Airlines)

One-way from

$382
(Kiwi.com)

Popular in

October

Cheapest in

November

Average price

$1,232
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 Seoul (SEL) to Colorado
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One-way flight from Seoul (SEL) to Colorado
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High demand for flights, 1% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Seoul to Colorado

Cheapest flights from Seoul to Colorado
Explore the most affordable flight options available from Seoul to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This American Airlines deal was found by Cheapflights users on 10/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/257:15 pmICN - DEN
1 stop17h 02mAmerican Airlines
Sun 12/77:26 amDEN - ICN
2 stops41h 19mAmerican Airlines
Deal found 10/29$589
This Trip.com deal was found by Cheapflights users on 10/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/121:20 pmICN - DEN
1 stop21h 05mMultiple Airlines
Mon 12/86:00 amDEN - ICN
1 stop31h 10mMultiple Airlines
Deal found 10/28$615
This Trip.com deal was found by Cheapflights users on 10/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/121:20 pmICN - DEN
1 stop21h 05mMultiple Airlines
Tue 12/95:01 pmDEN - ICN
1 stop31h 19mMultiple Airlines
Deal found 10/29$616
This Delta deal was found by Cheapflights users on 10/28. 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.
Wed 12/248:05 pmICN - DEN
2 stops31h 00mDelta
Thu 1/16:05 amDEN - ICN
1 stop18h 25mDelta
Deal found 10/28$620
This Delta deal was found by Cheapflights users on 10/30. 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 11/48:05 pmICN - DEN
2 stops29h 24mDelta
Wed 11/1912:02 pmDEN - ICN
1 stop36h 18mDelta
Deal found 10/30$623
This American Airlines deal was found by Cheapflights users on 10/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/217:15 pmICN - DEN
1 stop20h 41mAmerican Airlines
Fri 11/286:00 amDEN - ICN
1 stop18h 45mAmerican Airlines
Deal found 10/28$624
This American Airlines deal was found by Cheapflights users on 10/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:15 pmICN - DEN
1 stop17h 02mAmerican Airlines
Mon 12/86:46 pmDEN - ICN
2 stops29h 59mAmerican Airlines
Deal found 10/28$628
This FlightHub deal was found by Cheapflights users on 10/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/118:40 pmICN - DEN
1 stop17h 15mAsiana Airlines
Sun 12/76:00 amDEN - ICN
1 stop17h 45mAsiana Airlines
Deal found 10/28$646
This United Airlines deal was found by Cheapflights users on 10/29. 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 12/296:00 pmICN - COS
2 stops30h 46mUnited Airlines
Sun 1/48:50 pmCOS - ICN
2 stops27h 25mUnited Airlines
Deal found 10/29$898
This United Airlines deal was found by Cheapflights users on 10/29. 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 12/296:00 pmICN - COS
2 stops30h 46mUnited Airlines
Sat 1/38:50 pmCOS - ICN
2 stops27h 25mUnited Airlines
Deal found 10/29$994
This American Airlines deal was found by Cheapflights users on 10/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:15 pmICN - COS
1 stop32h 32mAmerican Airlines
Sun 1/412:22 pmCOS - ICN
2 stops36h 23mAmerican Airlines
Deal found 10/29$1,175
This American Airlines deal was found by Cheapflights users on 10/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:15 pmICN - COS
1 stop20h 32mAmerican Airlines
Sat 1/36:00 amCOS - ICN
1 stop18h 45mAmerican Airlines
Deal found 10/29$1,342

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seoul 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 October 30, 2025.
Use the filters below to find and compare flights from Seoul to Colorado that are best for you.

Fly from

Seoul

Fly to

Colorado

Route

Depart

Return

Price

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Tue 11/25

7:15 pm-3:46 pm

1 stop36h 31m

Denver Intl

Sun 12/7

7:26 am-4:45 pm

2 stops41h 19m

$592

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Mon 2/2

8:35 pm-11:36 pm

1 stop19h 01m

Denver Intl

Wed 2/4

7:00 am-6:35 pm

1 stop19h 35m

$605

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Mon 2/2

8:35 pm-11:36 pm

1 stop19h 01m

Denver Intl

Wed 2/4

5:09 pm-6:35 pm

1 stop33h 26m

$606

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Mon 2/2

7:15 pm-8:53 pm

1 stop17h 38m

Denver Intl

Wed 2/4

2:06 pm-4:45 pm

2 stops34h 39m

$620

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Mon 2/2

8:05 pm-11:25 pm

1 stop19h 20m

Denver Intl

Tue 2/3

12:30 am-3:50 pm

1 stop23h 20m

$635

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Sun 11/16

7:30 pm-11:14 pm

1 stop19h 44m

Denver Intl

Sun 11/23

7:45 pm-4:30 pm

1 stop28h 45m

$672

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Wed 11/12

4:10 pm-6:55 pm

1 stop18h 45m

Denver Intl

Thu 12/11

6:05 am-4:30 pm

1 stop18h 25m

$696

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Fri 11/14

8:05 pm-6:55 pm

1 stop14h 50m

Denver Intl

Sun 12/7

6:05 am-4:30 pm

1 stop18h 25m

$696

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Tue 11/25

4:10 pm-6:55 pm

1 stop18h 45m

Denver Intl

Thu 12/25

6:05 am-4:30 pm

1 stop18h 25m

$696

IncheonColorado Springs

ICN - COS

ICNCOS

Incheon Intl

Mon 12/29

6:00 pm-8:46 am

2 stops30h 46m

Colorado Springs

Sun 1/4

8:50 pm-4:15 pm

2 stops27h 25m

$898

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 41 results
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Best time to book a flight from Seoul to Colorado

Have a flexible travel schedule? Discover the best time to fly to Colorado from Seoul 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 Seoul to Colorado

What is the cheapest month to book a flight from Seoul to Colorado?

Currently, November is the cheapest month in which you can book a flight from Seoul to Colorado (average of $540). Flying from Seoul to Colorado in February is currently the most expensive (average of $996). 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 SEL to CO?

Find hourly flight availability from Seoul 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 October 30, 2025.

When flying from Seoul to Colorado, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 9% versus a flight at noon.

How much does it cost to fly round-trip from Seoul 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 October 30, 2025.
Get a feel of what it's like to fly with Korean Air, Delta, and United Airlines from Seoul to Colorado by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,155 reviews

Crew

8.7

Comfort

8.3

Food

8.1

Entertainment

8.2

Boarding

8.5

Overall

8.4

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
1,155 reviews
Korean Air
8.4
Very good
1,155 reviews

Crew

8.7

Comfort

8.3

Food

8.1

Entertainment

8.2

Boarding

8.5

Overall

8.4

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
7,993 reviews
Korean Air
8.4
Very good
1,155 reviews

Crew

8.7

Comfort

8.3

Food

8.1

Entertainment

8.2

Boarding

8.5

Overall

8.4

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
8,998 reviews
Korean Air
8.4
Very good
1,155 reviews

Crew

8.7

Comfort

8.3

Food

8.1

Entertainment

8.2

Boarding

8.5

Overall

8.4

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
11,030 reviews
Korean Air
8.4
Very good
1,155 reviews

Crew

8.7

Comfort

8.3

Food

8.1

Entertainment

8.2

Boarding

8.5

Overall

8.4

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!!
Air Canada
7.1
Good
10,377 reviews
Korean Air
8.4
Very good
1,155 reviews

Crew

8.7

Comfort

8.3

Food

8.1

Entertainment

8.2

Boarding

8.5

Overall

8.4

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 Seoul 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 Seoul to Colorado?

    There are many flights that can get you from Seoul to Colorado in 19h 01m. Fly via American Airlines, Alaska Airlines, or Hawaiian Airlines to get the fastest option. The distance between Seoul and Colorado is about 6186 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Seoul to Colorado one-way?

    The cheapest airlines for a one-way flight from Seoul to Colorado are United Airlines ($545), Delta ($567), and Alaska Airlines ($574).

  • What are the most popular routes from Seoul to Colorado?

    The most popular route from Seoul to Colorado is Incheon Intl - Denver Intl. You may also consider Seoul Gimpo Intl - Denver Intl or Incheon Intl - Colorado Springs.

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

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

  • How can I find direct flights from Seoul to Colorado?

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

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

    Yes. Cheapflights offers flight deals from Seoul 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 Seoul to Colorado?

    Currently, November is the cheapest month in which you can book a flight from Seoul to Colorado (average of $540). Flying from Seoul to Colorado in February is currently the most expensive (average of $996). 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.

See more FAQs

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Alternative routes for Seoul 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 Seoul to Colorado

Discover the top 6 airlines that operate flights from Seoul 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$589Average$981FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$601Average$811FlexibilityNo cancel feeOn-time67%
DeltaCheapest$622Average$934FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$695Average$827FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$709Average$1,014FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$757Average$983FlexibilityNo cancel feeOn-time71%

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