HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Colorado

$396+ 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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEL — DEN
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seoul to Colorado with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 September 16, 2025.

Round-trip from

$454
(Kiwi.com)

One-way from

$396
(Kiwi.com)

Popular in

October

Cheapest in

November

Average price

$897
From Seoul (SEL) to Colorado
Search Deals
One-way flight from Seoul (SEL) to Colorado
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

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 September 16, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/268:35 pmICN - DEN
1 stop19h 00mMultiple Airlines
Sat 12/68:45 amDEN - ICN
1 stop17h 50mMultiple Airlines
Deal found 9/14$454
This Alaska Airlines deal was found by Cheapflights users on 9/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/248:35 pmICN - DEN
2 stops32h 25mAlaska Airlines
Sat 11/157:04 pmDEN - ICN
2 stops32h 21mAlaska Airlines
Deal found 9/14$487
This Alaska Airlines deal was found by Cheapflights users on 9/16. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/128:35 pmICN - DEN
2 stops19h 24mAlaska Airlines
Tue 1/66:48 pmDEN - ICN
2 stops31h 47mAlaska Airlines
Deal found 9/16$495
This Alaska Airlines deal was found by Cheapflights users on 9/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/248:35 pmICN - DEN
2 stops32h 25mAlaska Airlines
Fri 11/147:19 pmDEN - ICN
2 stops32h 06mAlaska Airlines
Deal found 9/14$496
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/268:35 pmICN - DEN
1 stop19h 00mMultiple Airlines
Wed 12/36:00 amDEN - ICN
1 stop20h 35mMultiple Airlines
Deal found 9/14$497
This Alaska Airlines deal was found by Cheapflights users on 9/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/268:35 pmICN - DEN
2 stops53h 59mAlaska Airlines
Fri 12/58:20 amDEN - ICN
2 stops42h 15mAlaska Airlines
Deal found 9/14$530
This Alaska Airlines deal was found by Cheapflights users on 9/13. 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.
Wed 10/299:25 pmICN - DEN
2 stops36h 41mAlaska Airlines
Wed 11/57:04 pmDEN - ICN
2 stops55h 31mAlaska Airlines
Deal found 9/13$537
This Alaska Airlines deal was found by Cheapflights users on 9/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/299:25 pmICN - DEN
2 stops29h 09mAlaska Airlines
Fri 12/58:20 amDEN - ICN
2 stops42h 15mAlaska Airlines
Deal found 9/14$547
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/318:35 pmICN - DEN
2 stops29h 59mAlaska Airlines
Fri 11/77:00 amDEN - ICN
1 stop19h 35mAlaska Airlines
Deal found 9/15$560
This Jetabroad deal was found by Cheapflights users on 9/14. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/299:25 pmICN - DEN
2 stops29h 09mHawaiian Airlines
Sat 11/151:23 pmDEN - ICN
1 stop37h 12mHawaiian Airlines
Deal found 9/14$574
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/128:35 pmICN - DEN
2 stops56h 25mAlaska Airlines
Fri 10/177:02 pmDEN - ICN
2 stops56h 58mAlaska Airlines
Deal found 9/15$586
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Wed 10/2911:55 amICN - COS
2 stops25h 04mUnited Airlines
Wed 11/512:54 pmCOS - ICN
2 stops24h 46mUnited Airlines
Deal found 9/14$661

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 September 16, 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 10/31

8:35 pm-11:34 am

2 stops29h 59m

Denver Intl

Fri 11/7

7:19 pm-6:35 pm

2 stops31h 16m

$496

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Mon 2/2

6:00 pm-12:26 pm

2 stops34h 26m

Denver Intl

Wed 2/4

11:35 am-5:40 am

1 stop26h 05m

$517

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Sun 10/12

8:35 pm-2:00 pm

2 stops56h 25m

Denver Intl

Fri 10/17

7:02 pm-7:00 pm

2 stops56h 58m

$586

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Fri 10/10

7:20 pm-11:14 pm

1 stop18h 54m

Denver Intl

Sat 11/22

12:18 pm-4:30 pm

1 stop36h 12m

$635

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Wed 10/15

7:20 pm-10:25 pm

2 stops18h 05m

Denver Intl

Wed 10/22

5:30 am-4:30 pm

2 stops20h 00m

$635

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Thu 10/30

8:05 pm-11:14 pm

1 stop18h 09m

Denver Intl

Sat 12/6

7:45 pm-4:30 pm

1 stop28h 45m

$635

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Fri 10/10

7:20 pm-9:29 am

2 stops29h 09m

Denver Intl

Mon 11/3

6:23 pm-4:30 pm

2 stops30h 07m

$635

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Fri 10/24

7:20 pm-10:25 pm

2 stops18h 05m

Denver Intl

Thu 11/13

6:05 am-4:30 pm

1 stop18h 25m

$635

IncheonDenver

ICN - DEN

ICNDEN

Incheon Intl

Tue 11/25

7:30 pm-11:14 pm

1 stop19h 44m

Denver Intl

Sun 12/7

6:05 am-4:30 pm

1 stop18h 25m

$635

IncheonColorado Springs

ICN - COS

ICNCOS

Incheon Intl

Wed 10/29

11:55 am-9:59 pm

2 stops25h 04m

Colorado Springs

Wed 11/5

12:54 pm-5:40 am

2 stops24h 46m

$661

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 47 results
1
2
3
...
5

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, October is the cheapest month in which you can book a flight from Seoul to Colorado (average of $197). Flying from Seoul to Colorado in March is currently the most expensive (average of $278). 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 September 16, 2025.

When flying from Seoul to Colorado, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 September 16, 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
1,140 reviews

Comfort

8.3

Entertainment

8.2

Crew

8.7

Boarding

8.5

Food

8.1

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
1,140 reviews
Korean Air
8.4
Very good
1,140 reviews

Comfort

8.3

Entertainment

8.2

Crew

8.7

Boarding

8.5

Food

8.1

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
8.0
Very good
7,954 reviews
Korean Air
8.4
Very good
1,140 reviews

Comfort

8.3

Entertainment

8.2

Crew

8.7

Boarding

8.5

Food

8.1

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
8,929 reviews
Korean Air
8.4
Very good
1,140 reviews

Comfort

8.3

Entertainment

8.2

Crew

8.7

Boarding

8.5

Food

8.1

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
10,000 reviews
Korean Air
8.4
Very good
1,140 reviews

Comfort

8.3

Entertainment

8.2

Crew

8.7

Boarding

8.5

Food

8.1

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
10,000 reviews
Korean Air
8.4
Very good
1,140 reviews

Comfort

8.3

Entertainment

8.2

Crew

8.7

Boarding

8.5

Food

8.1

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 18h 54m. Fly via Alaska Airlines, United Airlines, or Delta 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 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, October is the cheapest month in which you can book a flight from Seoul to Colorado (average of $197). Flying from Seoul to Colorado in March is currently the most expensive (average of $278). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seoul to Colorado

See prices for flight routes from nearby airports that may be better suited for you.
Incheon Intl to John F Kennedy Intl flights
Incheon Intl to Seattle flights
Incheon Intl to Los Angeles flights
Incheon Intl to Newark flights
Incheon Intl to LaGuardia flights
Incheon Intl to Honolulu flights
Incheon Intl to San Francisco flights
Incheon Intl to O'Hare Intl flights
Incheon Intl to Dulles Intl flights
Incheon Intl to Las Vegas flights
Incheon Intl to Dallas/Fort Worth flights
Gimpo Intl to Honolulu flights
Gimpo Intl to John F Kennedy Intl flights
Incheon Intl to Atlanta flights
Incheon Intl to Ontario flights
Gimpo Intl to Los Angeles flights
Incheon Intl to Detroit flights
Incheon Intl to Reagan-National flights
Gimpo Intl to San Francisco flights
Busan to Seattle flights
Gimpo Intl to O'Hare Intl flights
Incheon Intl to Boston flights
Gimpo Intl to Newark flights
Incheon Intl to Orlando flights
Incheon Intl to Midway flights
Incheon Intl to Baltimore flights
Incheon Intl to Tampa flights
Incheon Intl to Miami flights
Incheon Intl to Santa Ana flights
Incheon Intl to Denver flights
Incheon Intl to Burbank flights
Incheon Intl to Portland flights
Incheon Intl to San Diego flights
Incheon Intl to Love Field flights
Incheon Intl to Panama City flights
Incheon Intl to San Jose flights
Incheon Intl to Austin flights
Gimpo Intl to Atlanta flights
Gimpo Intl to Baltimore flights
Incheon Intl to Salt Lake City flights
Incheon Intl to Valparaiso flights
Incheon Intl to Sky Harbor Intl flights

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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$589Average$976FlexibilityNo cancel feeOn-time69%
DeltaCheapest$634Average$1,007FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$686Average$847FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$757Average$897FlexibilityNo cancel feeOn-time71%
Korean AirCheapest$783Average$1,020FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$800Average$1,070FlexibilityNo cancel feeOn-time76%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.