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$392+ 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 3/6. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SEL
Feb 19 — Feb 261
Thu 2/19
Thu 2/26
1 adult, Economy
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Cheap 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 January 20, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/110:30 pm
DEN
-
ICN
1 stop26h 15m
Multiple Airlines
Wed 4/86:20 pm
ICN
-
DEN
1 stop21h 22m
Multiple Airlines
Deal found 1/17$750
This Kiwi.com deal was found by Cheapflights users on 1/18. 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.
Wed 3/1810:30 pm
DEN
-
ICN
1 stop26h 50m
Multiple Airlines
Wed 4/86:20 pm
ICN
-
DEN
1 stop21h 22m
Multiple Airlines
Deal found 1/18$752
This Kiwi.com deal was found by Cheapflights users on 1/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/3110:30 pm
DEN
-
ICN
1 stop26h 15m
Multiple Airlines
Wed 4/86:20 pm
ICN
-
DEN
1 stop21h 22m
Multiple Airlines
Deal found 1/17$767
This Kiwi.com deal was found by Cheapflights users on 1/20. 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 3/510:43 pm
DEN
-
ICN
1 stop25h 37m
Multiple Airlines
Wed 3/186:55 pm
ICN
-
DEN
1 stop20h 42m
Multiple Airlines
Deal found 1/20$781
This Kiwi.com deal was found by Cheapflights users on 1/19. 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.
Tue 2/179:31 pm
DEN
-
ICN
1 stop26h 49m
Multiple Airlines
Tue 2/241:20 pm
ICN
-
DEN
1 stop36h 29m
Multiple Airlines
Deal found 1/19$802
This Kiwi.com deal was found by Cheapflights users on 1/19. 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.
Wed 2/49:44 pm
DEN
-
ICN
1 stop26h 36m
Multiple Airlines
Mon 3/26:55 pm
ICN
-
DEN
1 stop33h 10m
Multiple Airlines
Deal found 1/19$805
This American Airlines deal was found by Cheapflights users on 1/19. 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.
Thu 1/226:00 am
DEN
-
ICN
1 stop18h 45m
American Airlines
Wed 2/47:15 pm
ICN
-
DEN
1 stop17h 38m
American Airlines
Deal found 1/19$806
This American Airlines deal was found by Cheapflights users on 1/18. 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.
Sat 2/75:29 pm
DEN
-
ICN
1 stop31h 16m
American Airlines
Tue 2/177:15 pm
ICN
-
DEN
1 stop19h 25m
American Airlines
Deal found 1/18$807
This KAYAK deal was found by Cheapflights users on 1/20. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/147:10 am
DEN
-
GMP
2 stops45h 40m
China Eastern
Tue 4/218:50 pm
GMP
-
DEN
2 stops36h 11m
China Eastern
Deal found 1/20$1,214
This KAYAK deal was found by Cheapflights users on 1/20. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/106:30 am
DEN
-
GMP
2 stops46h 20m
China Eastern
Wed 4/228:50 pm
GMP
-
DEN
2 stops36h 11m
China Eastern
Deal found 1/20$1,239
This KAYAK deal was found by Cheapflights users on 1/18. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/18:50 pm
DEN
-
GMP
2 stops29h 45m
ANA
Wed 3/47:45 am
GMP
-
DEN
2 stops27h 52m
ANA
Deal found 1/18$1,392
This Air Canada deal was found by Cheapflights users on 1/19. 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.
Mon 3/238:05 am
DEN
-
GMP
2 stops23h 20m
Multiple Airlines
Sun 3/292:25 pm
GMP
-
DEN
2 stops37h 13m
Multiple Airlines
Deal found 1/19$1,449

Find 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 January 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$734
(Kiwi.com)

One-way from

$392
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$1,140
Provider with most accurate pricing for Denver Intl-Seoul (SEL) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Seoul (SEL) flights.
Search Deals
From Denver Intl to Seoul (SEL)
Search Deals
One-way flight from Denver Intl to Seoul (SEL)
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($71 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($53 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 20, 2026.
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

Tue 3/24

10:30 pm-4:20 pm

1 stop26h 50m

Incheon Intl

Wed 4/1

10:00 pm-8:58 am

2 stops25h 58m

$877

DenverIncheon

DEN - ICN

DENICN

Denver Intl

Sat 3/21

10:30 pm-8:30 pm

1 stop31h 00m

Incheon Intl

Tue 3/24

1:20 pm-12:30 am

1 stop26h 10m

$964

DenverIncheon

DEN - ICN

DENICN

Denver Intl

Mon 3/30

9:00 am-5:20 am

1 stop29h 20m

Incheon Intl

Mon 4/6

6:20 pm-12:42 am

1 stop21h 22m

$1,040

DenverIncheon

DEN - ICN

DENICN

Denver Intl

Thu 3/5

7:52 pm-11:20 am

2 stops23h 28m

Incheon Intl

Fri 3/13

12:30 pm-6:15 pm

2 stops20h 45m

$1,101

DenverIncheon

DEN - ICN

DENICN

Denver Intl

Wed 5/13

7:50 pm-11:30 am

2 stops24h 40m

Incheon Intl

Fri 5/29

12:45 pm-8:45 pm

2 stops23h 00m

$1,110

DenverIncheon

DEN - ICN

DENICN

Denver Intl

Sat 4/11

6:03 pm-6:35 pm

2 stops33h 32m

Incheon Intl

Fri 4/17

8:35 pm-6:28 pm

2 stops36h 53m

$1,124

DenverIncheon

DEN - ICN

DENICN

Denver Intl

Mon 5/4

4:11 pm-4:05 pm

1 stop32h 54m

Incheon Intl

Mon 5/11

5:45 pm-8:36 am

2 stops29h 51m

$1,152

DenverSeoul

DEN - GMP

DENGMP

Denver Intl

Wed 4/15

7:10 am-11:00 am

2 stops36h 50m

Seoul Gimpo Intl

Tue 4/21

8:50 pm-6:01 pm

2 stops36h 11m

$1,214

DenverSeoul

DEN - GMP

DENGMP

Denver Intl

Wed 4/15

7:10 am-11:00 am

2 stops36h 50m

Seoul Gimpo Intl

Wed 4/22

8:50 pm-6:01 pm

2 stops36h 11m

$1,214

DenverSeoul

DEN - GMP

DENGMP

Denver Intl

Tue 4/14

7:10 am-7:50 pm

2 stops45h 40m

Seoul Gimpo Intl

Wed 4/22

8:50 pm-6:01 pm

2 stops36h 11m

$1,214

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/18

Showing 1-10 of 42 results
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Compare providers for flights from Denver to Seoul

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Denver to Seoul in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Denver-Seoul flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-Seoul flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Denver-Seoul flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Denver-Seoul flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Denver-Seoul flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 January 16, 2026.

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 $133). Flying from Denver to Seoul in June is currently the most expensive (average of $1,408). 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.

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

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 January 20, 2026.
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
1,187 reviews

Overall

8.4

Food

8.1

Crew

8.7

Entertainment

8.2

Comfort

8.3

Boarding

8.5

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
1,187 reviews
Korean Air
8.4
Very good
1,187 reviews

Overall

8.4

Food

8.1

Crew

8.7

Entertainment

8.2

Comfort

8.3

Boarding

8.5

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
8.1
Very good
501 reviews
Korean Air
8.4
Very good
1,187 reviews

Overall

8.4

Food

8.1

Crew

8.7

Entertainment

8.2

Comfort

8.3

Boarding

8.5

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
7.9
Good
8,085 reviews
Korean Air
8.4
Very good
1,187 reviews

Overall

8.4

Food

8.1

Crew

8.7

Entertainment

8.2

Comfort

8.3

Boarding

8.5

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
9,188 reviews
Korean Air
8.4
Very good
1,187 reviews

Overall

8.4

Food

8.1

Crew

8.7

Entertainment

8.2

Comfort

8.3

Boarding

8.5

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
10,644 reviews
Korean Air
8.4
Very good
1,187 reviews

Overall

8.4

Food

8.1

Crew

8.7

Entertainment

8.2

Comfort

8.3

Boarding

8.5

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?

    China Eastern can get you from Denver to Seoul in just under 36h 50m. Your travel time can differ by up to . Airlines will cover a distance of 6168 mi.

  • 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 Delta. You may be able to fly from Denver to Seoul for 95% less than the average price by searching for these airlines.

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

    For one-way options, check prices for Air Canada. According to our data, you can fly for as low as $528. Users have also found prices from $553 and $582 on Asiana Airlines and Delta, respectively.

  • 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 $133). Flying from Denver to Seoul in June is currently the most expensive (average of $1,408). 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 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 January 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$54Average$146FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$187Average$660FlexibilityNo cancel feeOn-time69%
DeltaCheapest$474Average$998FlexibilityNo cancel feeOn-timeN/A
AIR PREMIACheapest$585Average$615FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$586Average$1,586FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$741Average$1,256FlexibilityNo cancel feeOn-time76%
WestJetCheapest$748Average$1,176FlexibilityNo cancel feeOn-time60%
Turkish AirlinesCheapest$863Average$999FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$877Average$1,189FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$975Average$1,222FlexibilityNo cancel feeOn-time67%

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