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$417+ Cheap flights from Colorado to Seoul (SEL)

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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SEL
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
1 adult, Economy
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Cheap flight deals from Colorado to Seoul

Keep the following information in mind while searching for Colorado to Seoul flight deals. Data was last updated March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$774
(Trip.com)

One-way from

$417
(Trip.com)

Popular in

July

Cheapest in

February

Average price

$1,201
Provider with most accurate pricing for Denver Intl-Seoul (SEL) flight deals.
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Provider most trusted by Cheapflights users for Denver Intl-Seoul (SEL) flights.
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From Colorado to Seoul (SEL)
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One-way flight from Colorado to Seoul (SEL)
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Highest demand for flights based on searches. 25% potential increase in price ($475 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($67 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find flight deals from Colorado to Seoul

Cheapest flights from Colorado to Seoul
Explore the most affordable flight options available from Colorado to Seoul. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 31, 2025.

This Kiwi.com deal was found by Cheapflights users on 3/31. 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.
Sat 4/2610:38 pmDEN - ICN
1 stop30h 52mMultiple Airlines
Sun 5/116:20 pmICN - DEN
1 stop21h 22mMultiple Airlines
Deal found 3/31$775
This CrystalTravel deal was found by Cheapflights users on 3/30. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/257:50 pmDEN - ICN
1 stop30h 50mTurkish Airlines
Mon 11/1712:10 amICN - DEN
1 stop33h 30mTurkish Airlines
Deal found 3/30$894
This CheapOair deal was found by Cheapflights users on 3/31. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/157:05 amDEN - ICN
2 stops41h 15mChina Eastern
Thu 5/298:55 amICN - DEN
2 stops24h 24mChina Eastern
Deal found 3/31$994
This Kiwi.com deal was found by Cheapflights users on 3/31. 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.
Thu 6/57:40 pmDEN - ICN
1 stop32h 05mWestJet
Tue 6/248:45 pmICN - DEN
1 stop29h 42mWestJet
Deal found 3/31$1,017
This Justfly.com deal was found by Cheapflights users on 3/30. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/187:19 pmDEN - ICN
2 stops29h 46mAir Canada
Mon 10/65:45 pmICN - DEN
1 stop19h 57mAir Canada
Deal found 3/30$1,229
This Gotogate deal was found by Cheapflights users on 3/31. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/261:25 pmDEN - GMP
2 stops41h 55mANA
Thu 5/87:55 pmGMP - DEN
2 stops42h 01mANA
Deal found 3/31$1,354
This United deal was found by Cheapflights users on 3/30. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/62:00 pmCOS - ICN
2 stops23h 20mUnited Airlines
Wed 5/214:50 pmICN - COS
2 stops19h 46mUnited Airlines
Deal found 3/30$1,433
This Expedia deal was found by Cheapflights users on 3/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/165:20 pmDEN - GMP
2 stops28h 45mMultiple Airlines
Tue 10/218:20 amGMP - DEN
2 stops26h 03mMultiple Airlines
Deal found 3/30$1,584
This Air Canada deal was found by Cheapflights users on 3/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/66:39 pmCOS - ICN
2 stops30h 26mMultiple Airlines
Tue 7/85:45 pmICN - COS
2 stops19h 10mMultiple Airlines
Deal found 3/30$1,700
This oojo deal was found by Cheapflights users on 3/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/612:13 pmCOS - ICN
2 stops37h 52mQatar Airways
Mon 7/71:20 amICN - COS
2 stops35h 56mQatar Airways
Deal found 3/30$1,907
This FlightHub deal was found by Cheapflights users on 3/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/216:30 amDEN - GMP
2 stops37h 30mChina Eastern
Sun 6/298:50 pmGMP - DEN
2 stops36h 30mChina Eastern
Deal found 3/30$1,910
This Orbitz deal was found by Cheapflights users on 3/30. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/198:57 pmDEN - GMP
2 stops33h 53mJapan Airlines
Thu 11/612:05 pmGMP - DEN
2 stops19h 43mJapan Airlines
Deal found 3/30$2,006

Cheapflights Fare Finder

Customize your flight search to find flights from Colorado to Seoul 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 March 31, 2025.
Use the filters below to find and compare flights from Colorado to Seoul that are best for you.

Fly from

Colorado

Fly to

Seoul

Route

Depart

Return

Price

DenverIncheon

DEN - ICN

DENICN

Denver Intl

Sat 4/26

10:38 pm-8:30 pm

1 stop30h 52m

Incheon Intl

Sun 5/11

6:20 pm-12:42 am

1 stop21h 22m

$775

DenverIncheon

DEN - ICN

DENICN

Denver Intl

Thu 9/25

7:50 pm-5:40 pm

1 stop30h 50m

Incheon Intl

Mon 11/17

12:10 am-5:40 pm

1 stop33h 30m

$894

DenverIncheon

DEN - ICN

DENICN

Denver Intl

Tue 4/15

7:05 am-3:20 pm

2 stops41h 15m

Incheon Intl

Thu 5/29

8:55 am-6:19 pm

2 stops24h 24m

$994

DenverIncheon

DEN - ICN

DENICN

Denver Intl

Thu 6/5

7:40 pm-6:45 pm

1 stop32h 05m

Incheon Intl

Tue 6/24

8:45 pm-11:27 am

1 stop29h 42m

$1,017

DenverIncheon

DEN - ICN

DENICN

Denver Intl

Mon 8/18

7:19 pm-4:05 pm

2 stops29h 46m

Incheon Intl

Mon 10/6

5:45 pm-10:42 pm

1 stop19h 57m

$1,229

DenverSeoul

DEN - GMP

DENGMP

Denver Intl

Sat 4/26

1:25 pm-10:20 pm

2 stops41h 55m

Seoul Gimpo Intl

Thu 5/8

7:55 pm-10:56 pm

2 stops42h 01m

$1,354

Colorado SpringsIncheon

COS - ICN

COSICN

Colorado Springs

Tue 5/6

2:00 pm-4:20 am

2 stops23h 20m

Incheon Intl

Wed 5/21

4:50 pm-9:36 pm

2 stops19h 46m

$1,433

DenverSeoul

DEN - GMP

DENGMP

Denver Intl

Sun 4/20

9:52 am-1:05 pm

2 stops36h 13m

Seoul Gimpo Intl

Sun 4/27

7:20 pm-12:46 pm

2 stops32h 26m

$1,640

Colorado SpringsIncheon

COS - ICN

COSICN

Colorado Springs

Tue 5/6

6:39 pm-4:05 pm

2 stops30h 26m

Incheon Intl

Tue 7/8

5:45 pm-9:55 pm

2 stops19h 10m

$1,700

Colorado SpringsIncheon

COS - ICN

COSICN

Colorado Springs

Tue 5/6

12:13 pm-5:05 pm

2 stops37h 52m

Incheon Intl

Mon 7/7

1:20 am-10:16 pm

2 stops35h 56m

$1,907

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 35 results
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Best time to book a flight from Colorado to Seoul

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

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

Currently, February is the cheapest month in which you can book a flight from Colorado to Seoul (average of $1,002). Flying from Colorado to Seoul in June is currently the most expensive (average of $1,661). 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 CO to SEL?

Find hourly flight availability from Colorado to Seoul. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 31, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Colorado to Seoul as you normally would.

Rainfall in Seoul by month

Plan your trip to Seoul by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seoul ranges from 1.1 - 10.0 inches per month. July is typically the wettest month, when rainfall can reach 10.0 in. December is typically the driest time to visit Seoul when rainfall is around 1.1 in.

Temperature in Seoul by month

Plan your trip to Seoul by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seoul, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

Reviews of airlines servicing Seoul

Get insights into the airlines that provide service to Seoul. 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 Seoul. Reviews last updated March 31, 2025.
Peruse reviews from past customers who have flown with Korean Air, Japan Airlines and ANA from Colorado to Seoul to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,051 reviews

Overall

8.4

Boarding

8.5

Food

8.1

Crew

8.7

Comfort

8.3

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,051 reviews
Korean Air
8.4
Very good
1,051 reviews

Overall

8.4

Boarding

8.5

Food

8.1

Crew

8.7

Comfort

8.3

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Japan Airlines
8.3
Very good
1,440 reviews
Korean Air
8.4
Very good
1,051 reviews

Overall

8.4

Boarding

8.5

Food

8.1

Crew

8.7

Comfort

8.3

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
ANA
8.3
Very good
831 reviews
Korean Air
8.4
Very good
1,051 reviews

Overall

8.4

Boarding

8.5

Food

8.1

Crew

8.7

Comfort

8.3

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Singapore Airlines
8.1
Very good
1,286 reviews
Korean Air
8.4
Very good
1,051 reviews

Overall

8.4

Boarding

8.5

Food

8.1

Crew

8.7

Comfort

8.3

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Delta
8.0
Very good
7,899 reviews
Korean Air
8.4
Very good
1,051 reviews

Overall

8.4

Boarding

8.5

Food

8.1

Crew

8.7

Comfort

8.3

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

Related info for your journey

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

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

    The cheapest airlines for a one-way flight from Colorado to Seoul are WestJet ($559), Air Canada ($705), and Alaska Airlines ($752).

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

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

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Colorado to Seoul (average of $1,002). Flying from Colorado to Seoul in June is currently the most expensive (average of $1,661). 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

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Alternative routes for Colorado to Seoul

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from Colorado to Seoul

Discover the top 9 airlines that operate flights from Colorado to Seoul. 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 March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$54Average$103FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$660Average$1,483FlexibilityNo cancel feeOn-time69%
Turkish AirlinesCheapest$755Average$959FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$856Average$1,274FlexibilityNo cancel feeOn-time67%
DeltaCheapest$876Average$1,350FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$877Average$1,372FlexibilityNo cancel feeOn-time71%
Korean AirCheapest$978Average$1,440FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$1,103Average$1,241FlexibilityNo cancel feeOn-time76%
Japan AirlinesCheapest$1,315Average$1,750FlexibilityNo cancel feeOn-time79%
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