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$320+ Cheap flights from Denver (DEN) 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 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SEL
oct. 15 — oct. 221
mié. 10/15
mié. 10/22
1 adult, Economy
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Cheapflights Tip: The best prices from Denver Intl to Seoul are usually found in February or September, booked 34 days in advance, depart on a Wednesday or Tuesday and return on a Monday

Cheap flight deals from Denver to Seoul

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Seoul (SEL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated septiembre 15, 2025.

Round-trip from

$843
(Kiwi.com)

One-way from

$320
(Kiwi.com)

Popular in

January

Cheapest in

February

Average price

$1,024
From Denver Intl to Seoul (SEL)
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One-way flight from Denver Intl to Seoul (SEL)
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Highest demand for flights based on searches. 5% potential increase in price ($70 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($40 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Denver to Seoul

Cheapest flights from Denver to Seoul
Explore the most affordable flight options available from Denver to Seoul. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 15, 2025.

This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/3010:55 pmDEN - ICN
1 stop26h 15mMultiple Airlines
jue. 11/68:35 pmICN - DEN
2 stops29h 43mMultiple Airlines
Deal found 9/15$843
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/36:30 amDEN - ICN
1 stop30h 50mMultiple Airlines
dom. 11/99:25 pmICN - DEN
2 stops22h 34mMultiple Airlines
Deal found 9/13$849
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.
mar. 11/112:37 pmDEN - ICN
2 stops33h 33mMultiple Airlines
mié. 12/310:00 pmICN - DEN
1 stop28h 03mMultiple Airlines
Deal found 9/14$854
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/168:00 amDEN - ICN
1 stop29h 20mMultiple Airlines
dom. 11/238:35 pmICN - DEN
2 stops38h 41mMultiple Airlines
Deal found 9/15$871
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/128:22 pmDEN - ICN
2 stops41h 28mMultiple Airlines
dom. 10/196:20 pmICN - DEN
1 stop20h 42mMultiple Airlines
Deal found 9/13$875
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.
mar. 10/2810:55 pmDEN - ICN
1 stop26h 15mMultiple Airlines
jue. 11/201:20 pmICN - DEN
2 stops26h 23mMultiple Airlines
Deal found 9/14$876
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/1012:59 amDEN - ICN
2 stops36h 41mMultiple Airlines
mar. 11/189:00 pmICN - DEN
1 stop35h 57mMultiple Airlines
Deal found 9/13$877
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/1510:45 amDEN - ICN
1 stop27h 05mMultiple Airlines
mié. 10/229:25 pmICN - DEN
2 stops27h 53mMultiple Airlines
Deal found 9/15$878
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.
lun. 11/36:30 amDEN - ICN
1 stop30h 50mMultiple Airlines
mar. 11/119:00 pmICN - DEN
1 stop35h 57mMultiple Airlines
Deal found 9/14$883
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.
lun. 11/246:14 amDEN - ICN
2 stops31h 06mMultiple Airlines
vie. 12/128:35 pmICN - DEN
1 stop18h 21mMultiple Airlines
Deal found 9/14$885
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/36:25 amDEN - GMP
2 stops36h 35mChina Eastern
jue. 12/118:50 pmGMP - DEN
2 stops37h 41mChina Eastern
Deal found 9/13$918
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/305:40 pmDEN - GMP
2 stops28h 25mAir China
lun. 11/32:25 pmGMP - DEN
2 stops33h 59mAir China
Deal found 9/14$1,265

Cheapflights Fare Finder

 
Customize your flight search to find flights from Denver 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 septiembre 15, 2025.
Use the filters below to find and compare flights from Denver to Seoul that are best for you.

Fly from

Denver

Fly to

Seoul

Route

Depart

Return

Price

DenverIncheon

DEN - ICN

DENICN

Denver Intl

jue. 11/27

7:20 pm-6:20 pm

1 stop31h 00m

Incheon Intl

lun. 12/15

10:45 am-5:35 pm

1 stop46h 50m

$1,022

DenverIncheon

DEN - ICN

DENICN

Denver Intl

sáb. 2/14

7:20 pm-6:20 pm

1 stop31h 00m

Incheon Intl

mié. 3/11

12:10 am-6:35 pm

1 stop33h 25m

$1,022

DenverIncheon

DEN - ICN

DENICN

Denver Intl

mié. 10/1

6:30 am-3:20 pm

2 stops41h 50m

Incheon Intl

mié. 10/15

8:55 am-6:24 pm

2 stops24h 29m

$1,071

DenverIncheon

DEN - ICN

DENICN

Denver Intl

mié. 10/1

7:55 pm-4:20 am

1 stop17h 25m

Incheon Intl

mié. 10/15

6:00 pm-7:38 pm

1 stop40h 38m

$1,146

DenverIncheon

DEN - ICN

DENICN

Denver Intl

lun. 9/29

5:44 am-3:30 pm

1 stop18h 46m

Incheon Intl

mar. 10/7

5:45 pm-10:05 pm

1 stop19h 20m

$1,158

DenverIncheon

DEN - ICN

DENICN

Denver Intl

sáb. 1/31

1:30 pm-9:05 am

2 stops27h 35m

Incheon Intl

vie. 2/20

12:10 am-5:35 pm

1 stop33h 25m

$1,178

DenverIncheon

DEN - ICN

DENICN

Denver Intl

lun. 10/20

7:02 pm-7:00 pm

3 stops32h 58m

Incheon Intl

lun. 10/27

8:35 pm-10:35 am

2 stops29h 00m

$1,184

DenverIncheon

DEN - ICN

DENICN

Denver Intl

sáb. 1/3

7:20 pm-6:20 pm

1 stop31h 00m

Incheon Intl

vie. 1/30

12:10 am-4:34 pm

2 stops32h 24m

$1,184

DenverIncheon

DEN - ICN

DENICN

Denver Intl

mar. 11/11

7:20 pm-6:20 pm

1 stop31h 00m

Incheon Intl

lun. 11/17

12:10 am-3:44 pm

2 stops31h 34m

$1,184

DenverIncheon

DEN - ICN

DENICN

Denver Intl

lun. 11/3

11:51 am-9:35 am

2 stops29h 44m

Incheon Intl

lun. 11/10

12:10 am-5:35 pm

1 stop33h 25m

$1,188

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 38 results
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Best time to book a flight from Denver to Seoul

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

How far ahead should I book a flight from Denver to Seoul?

Use this chart to determine the optimal time to book a round-trip flight from Denver to Seoul. Price data was last updated on September 12, 2025.

Booking 34 days in advance of your planned departure date is, on average, the best time to get cheap flights from Denver to Seoul. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, February is the cheapest month in which you can book a flight from Denver to Seoul (average of $990). Flying from Denver to Seoul in December is currently the most expensive (average of $1,633). 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 DEN to SEL?

Find hourly flight availability from Denver 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 septiembre 15, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 13% on flights from Denver to Seoul by exploring options for tickets in the morning.

How much does it cost to fly round-trip from Denver to Seoul?

What’s the top layover airport for flights from Denver to Seoul?

Share of 1-stop round-trip flights from Denver to Seoul chosen by Cheapflights users in the past 12 months, using the same layover each way.

Vancouver (YVR) – chosen by Cheapflights users on 50% of 1-stop itineraries from Denver to Seoul on Cheapflights.

What’s the cheapest layover airport for flights from Denver to Seoul?

Average round-trip fare for 1-stop flights from Denver to Seoul, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Vancouver (YVR) is the most affordable 1-stop option, with an average round-trip price of $1,291.

What’s the fastest layover option from Denver to Seoul?

Shortest average travel time for 1-stop one-way flights from Denver to Seoul, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via San Francisco (SFO) have the shortest average one-way travel time for 1-stop routes: 16h 15m.

Which airport typically offers the quickest layover for flights from Denver to Seoul?

Average layover duration for 1-stop one-way flights from Denver to Seoul, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via San Francisco (SFO) offer the fastest connection on this route, with an average layover time of 1h 12m.

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 septiembre 15, 2025.
Get a feel of what it's like to fly with Korean Air, Asiana Airlines, and Delta from Denver to Seoul by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,139 reviews

Crew

8.7

Boarding

8.5

Entertainment

8.2

Food

8.1

Comfort

8.3

Overall

8.4

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
1,139 reviews
Korean Air
8.4
Very good
1,139 reviews

Crew

8.7

Boarding

8.5

Entertainment

8.2

Food

8.1

Comfort

8.3

Overall

8.4

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.
Asiana Airlines
8.2
Very good
479 reviews
Korean Air
8.4
Very good
1,139 reviews

Crew

8.7

Boarding

8.5

Entertainment

8.2

Food

8.1

Comfort

8.3

Overall

8.4

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
7,954 reviews
Korean Air
8.4
Very good
1,139 reviews

Crew

8.7

Boarding

8.5

Entertainment

8.2

Food

8.1

Comfort

8.3

Overall

8.4

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.
United Airlines
7.4
Good
8,929 reviews
Korean Air
8.4
Very good
1,139 reviews

Crew

8.7

Boarding

8.5

Entertainment

8.2

Food

8.1

Comfort

8.3

Overall

8.4

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.
Air Canada
7.1
Good
10,000 reviews
Korean Air
8.4
Very good
1,139 reviews

Crew

8.7

Boarding

8.5

Entertainment

8.2

Food

8.1

Comfort

8.3

Overall

8.4

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 Denver to Seoul. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Denver to Seoul?

    Denver Intl (DEN), located 18.5 mi from the city center, is the airport you fly out of when you book flights from Denver to Seoul. 10 airlines have flights from Denver Intl to Seoul on a regular basis. Booking flights from Denver Intl to Seoul should not be difficult; the airport handles an average of 0 outbound flights to Seoul per day.

  • How long is the flight from Denver to Seoul?

    Turkish Airlines, China Eastern, and American Airlines can get you from Denver to Seoul in just under 18h 46m. Your travel time can differ by up to 23h 04m. Airlines will cover a distance of 6186 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Denver to Seoul round-trip?

    Frontier, at $54, was found to be the cheapest airline from Denver to Seoul.Alternate airlines to your destination round-trip include United Airlines and AIR PREMIA. You may be able to fly from Denver to Seoul for 95% less than the average price by searching for these airlines.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Denver to Seoul (average of $990). Flying from Denver to Seoul in December is currently the most expensive (average of $1,633). 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 Denver to Seoul

See prices for flight routes from nearby airports that may be better suited for you.
Denver to Incheon Intl flights
Denver to Gimpo Intl flights
Colorado Springs to Incheon Intl flights
Denver to Busan flights
Denver to Cheongju flights

Top 10 airlines flying from Denver to Seoul

Discover the top 10 airlines that operate flights from Denver 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 septiembre 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$54Average$129FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$189Average$1,578FlexibilityNo cancel feeOn-time69%
AIR PREMIACheapest$585Average$615FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$587Average$1,099FlexibilityNo cancel feeOn-timeN/A
WestJetCheapest$748Average$1,213FlexibilityNo cancel feeOn-time60%
Turkish AirlinesCheapest$755Average$895FlexibilityNo cancel feeOn-time77%
Asiana AirlinesCheapest$757Average$1,226FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$843Average$1,504FlexibilityNo cancel feeOn-time81%
Air CanadaCheapest$856Average$1,184FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$877Average$1,077FlexibilityNo cancel feeOn-time71%

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