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$463+ 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 1/18. Fares are subject to change and may not be available on all flights or dates of travel.
SEL — DEN
Jan 16 — Jan 231
Fri 1/16
Fri 1/23
1 adult, Economy
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Cheap 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 December 17, 2025.

This United Airlines deal was found by Cheapflights users on 12/16. 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.
Tue 12/236:00 pmICN - DEN
1 stop18h 53mUnited Airlines
Tue 12/302:06 pmDEN - ICN
1 stop23h 34mUnited Airlines
Deal found 12/16$669
This Delta deal was found by Cheapflights users on 12/17. 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 stop31h 20mDelta
Wed 1/146:23 pmDEN - ICN
1 stop29h 57mDelta
Deal found 12/17$683
This Delta deal was found by Cheapflights users on 12/16. 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 1/157:00 amDEN - ICN
1 stop17h 20mDelta
Deal found 12/16$685
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.
Wed 12/248:05 pmICN - DEN
2 stops31h 00mDelta
Thu 1/16:05 amDEN - ICN
1 stop17h 50mDelta
Deal found 12/15$700
This Delta deal was found by Cheapflights users on 12/17. 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.
Mon 12/228:05 pmICN - DEN
1 stop31h 17mDelta
Mon 1/56:23 pmDEN - ICN
2 stops29h 32mDelta
Deal found 12/17$701
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.
Thu 12/2512:45 pmICN - DEN
1 stop17h 59mUnited Airlines
Sat 1/39:52 amDEN - ICN
1 stop38h 23mUnited Airlines
Deal found 12/15$712
This Delta deal was found by Cheapflights users on 12/17. 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
Fri 1/26:05 amDEN - ICN
1 stop17h 50mDelta
Deal found 12/17$751
This American Airlines deal was found by Cheapflights users on 12/17. 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 12/238:00 amGMP - DEN
2 stops19h 42mMultiple Airlines
Tue 12/305:05 pmDEN - GMP
2 stops25h 50mMultiple Airlines
Deal found 12/17$1,283
This Ovago deal was found by Cheapflights users on 12/16. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:45 amGMP - DEN
2 stops27h 52mANA
Thu 1/111:50 amDEN - GMP
2 stops31h 30mANA
Deal found 12/16$1,577
This Japan Airlines deal was found by Cheapflights users on 12/17. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/248:00 amGMP - DEN
2 stops19h 42mMultiple Airlines
Thu 1/18:11 pmDEN - GMP
2 stops33h 54mMultiple Airlines
Deal found 12/17$1,597
This Japan Airlines deal was found by Cheapflights users on 12/16. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/238:00 amGMP - DEN
2 stops19h 42mJapan Airlines
Fri 1/212:35 pmDEN - GMP
2 stops37h 45mJapan Airlines
Deal found 12/16$1,617
This Japan 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/238:00 amGMP - DEN
2 stops19h 42mMultiple Airlines
Fri 1/212:35 pmDEN - GMP
2 stops30h 20mMultiple Airlines
Deal found 12/15$1,619

Find flight deals from Seoul to Colorado

Keep the following information in mind while searching for Seoul to Colorado flight deals. Data was last updated December 17, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$544
(United Airlines)

One-way from

$463
(Kiwi.com)

Popular in

October

Cheapest in

January

Average price

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

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 December 17, 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

Fri 2/6

6:00 pm-8:28 am

2 stops30h 28m

Denver Intl

Sun 2/8

5:18 am-5:40 am

1 stop32h 22m

$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

$608

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

Wed 3/25

8:05 pm-11:31 pm

1 stop18h 26m

Denver Intl

Tue 3/31

5:34 am-3:20 pm

1 stop18h 46m

$621

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 5/1

7:00 pm-9:37 am

2 stops29h 37m

Denver Intl

Sat 5/9

3:40 pm-3:20 pm

1 stop32h 40m

$632

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Fri 1/30

7:40 pm-7:29 pm

1 stop15h 49m

Denver Intl

Thu 2/26

7:00 am-4:20 pm

1 stop17h 20m

$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

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

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Showing 1-10 of 42 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 $488). Flying from Seoul 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 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 December 17, 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 24% 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 December 17, 2025.
Get a feel of what it's like to fly with Korean Air, Asiana Airlines, and Delta 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
1,186 reviews

Overall

8.4

Comfort

8.3

Crew

8.7

Entertainment

8.2

Food

8.1

Boarding

8.5

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

Overall

8.4

Comfort

8.3

Crew

8.7

Entertainment

8.2

Food

8.1

Boarding

8.5

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

Overall

8.4

Comfort

8.3

Crew

8.7

Entertainment

8.2

Food

8.1

Boarding

8.5

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
8,005 reviews
Korean Air
8.4
Very good
1,186 reviews

Overall

8.4

Comfort

8.3

Crew

8.7

Entertainment

8.2

Food

8.1

Boarding

8.5

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
9,091 reviews
Korean Air
8.4
Very good
1,186 reviews

Overall

8.4

Comfort

8.3

Crew

8.7

Entertainment

8.2

Food

8.1

Boarding

8.5

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
11,054 reviews
Korean Air
8.4
Very good
1,186 reviews

Overall

8.4

Comfort

8.3

Crew

8.7

Entertainment

8.2

Food

8.1

Boarding

8.5

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 18h 26m. Fly via United Airlines, Delta, or ANA 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 Air Canada ($356), Korean Air ($457), and United Airlines ($505).

  • 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 $488). Flying from Seoul 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.

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 December 17, 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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