DEN - SEL

$320 Find Cheap Flights from Denver to Seoul

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to Seoul departing on 10/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Seoul.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Seoul.
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Flight Deals

Cheap Flights from Denver to Seoul (DEN-SEL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Denver to Seoul that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Denver to Seoul

Mon, Nov 3 - Mon, Nov 17
 Logo
9:21 am - 5:20 amDEN-ICN
27h 59m2 stops
 Logo
6:55 pm - 7:18 pmICN-DEN
16h 23m1 stop
Tue, Nov 4 - Mon, Nov 17
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10:55 pm - 4:10 pmDEN-ICN
25h 15m1 stop
 Logo
8:35 pm - 12:57 amICN-DEN
20h 22m2 stops
Mon, Nov 24 - Fri, Dec 12
China Eastern Logo
6:25 am - 3:20 pmDEN-ICN
40h 55m2 stops
China Eastern Logo
8:55 am - 6:31 pmICN-DEN
25h 36m2 stops
$846China Eastern
Find Deal
Tue, Nov 4 - Tue, Nov 18
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10:55 pm - 4:10 pmDEN-ICN
25h 15m1 stop
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9:20 pm - 4:57 pmICN-DEN
35h 37m2 stops
Sun, Oct 26 - Tue, Nov 11
China Eastern Logo
6:15 am - 5:25 pmDEN-ICN
44h 10m2 stops
China Eastern Logo
8:55 am - 6:33 pmICN-DEN
25h 38m2 stops
$918China Eastern
Find Deal
Sat, Jan 31 - Fri, Feb 20
Turkish Airlines Logo
7:20 pm - 6:20 pmDEN-ICN
31h 00m1 stop
Turkish Airlines Logo
12:10 am - 5:35 pmICN-DEN
33h 25m1 stop
$922Turkish Airlines
Find Deal
Thu, Oct 23 - Thu, Oct 30
Air China Logo
1:30 pm - 1:05 pmDEN-GMP
32h 35m2 stops
Air China Logo
2:25 pm - 8:24 amGMP-DEN
32h 59m2 stops
$1,279Air China
Find Deal
Fri, Oct 31 - Fri, Nov 7
Air China Logo
5:40 pm - 1:05 pmDEN-GMP
28h 25m2 stops
Air China Logo
2:25 pm - 8:24 amGMP-DEN
33h 59m2 stops
$1,282Air China
Find Deal
Thu, Feb 26 - Mon, Mar 2
Japan Airlines Logo
7:42 pm - 6:20 pmDEN-GMP
54h 38m2 stops
Japan Airlines Logo
7:40 pm - 7:12 pmGMP-DEN
39h 32m2 stops
$1,388Japan Airlines
Find Deal
Mon, Oct 20 - Mon, Nov 17
Japan Airlines Logo
6:43 am - 9:50 pmDEN-GMP
24h 07m2 stops
Japan Airlines Logo
7:40 pm - 5:34 pmGMP-DEN
37h 54m2 stops
$1,540Japan Airlines
Find Deal

Everything you should know

Top airlines
China Eastern
Cheapest • from $846 (round-trip)
Korean Air
Best reviews • 8.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
October
Cheapest • 22% price drop
October
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$843
Overall average: $1,030
Multiple Airlines
Mon 11/3Mon 11/17
DEN - ICN • 2 stops
Cheapest one-way
$320
Typical prices: $587-699
Multiple Airlines
Sun 10/5
DEN - ICN • 2 stops
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Seoul!
Booking Insights

KAYAK's insights & trends for Denver to Seoul flights

Get data-powered insights and trends into flights from Denver to Seoul to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Denver to Seoul?

What’s the cheapest day of the week to fly from Denver to Seoul?

The average price of all round-trip flights from Denver to Seoul clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Denver to Seoul, look for departures on Wednesdays and avoid leaving on a Saturday, as it's usually the priciest day. When flying back from Seoul, Sunday is the cheapest day to fly and Tuesday is the most expensive.

What is the cheapest month to fly from Denver to Seoul?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Denver to Seoul, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Denver to Seoul is October, where tickets cost $991 (return) on average. On the other hand, the most expensive months are January and June, where the average cost of round-trip tickets is $1,720 and $1,642 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Denver to Seoul, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Denver to Seoul, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$320
Best time to beat the crowds but there is an average 34% increase in price.
Most popular time to fly and prices are also 23% lower on average.
Flight from Denver to Seoul Incheon Airport

When to book flights from Denver to Seoul

Are your dates flexible? Find out the best times to travel from Denver to Seoul based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Denver to Seoul

  • Which eco-friendly practices do airlines flying from Denver to Seoul implement?

    10,316 lb is the average CO₂ emitted per person for this route. Air Canada has more sustainable flights emitting 45% less CO2. To reduce its carbon footprint, the airline has created several eco-friendly procedures. Air Canada uses the most up-to-date fuel-efficient aircraft and fleet optimization techniques to save fuel use.

  • Which airline offers family-friendly services from Denver to Seoul?

    For a journey from Denver to Seoul, Delta Airlines provides family-friendly services and amenities like priority boarding for parents of young children, pre-boarding with car seats, complimentary meals and snacks for kids, complimentary entertainment, and devoted support workers. Delta also provides bassinets and diapers upon request for families traveling with newborns and young children. Families can also take advantage of additional benefits and savings through Delta's SkyMiles program, and stroller-check services are offered at the airport of departure.

  • What are the common layover cities when flying from Denver to Seoul?

    You can find flights from Denver to Seoul with one to two connections en route. The layovers differ with your airline. For instance, United Airlines has a layover at San Francisco International Airport (SFO), while China Airlines have stops at Los Angeles International Airport (LAX). Japan Airlines has a layover at Chicago O'Hare Intl (ORD).

  • What transport options are from Seoul Airport (SEL) to downtown?

    Buses, trains, taxis, and vehicle rental services are available to get from Seoul Airport (SEL) to the city center. Bus services go from the airport to different areas of the city, and the trip takes between 45 minutes and an hour, depending on traffic. It only takes 43 minutes to go from the airport to downtown Seoul via the Airport Railway Express (AREX). Taxis are also an option, and they can take you from the airport to downtown in about an hour. As an alternative, the airport offers automobile rental services.

  • What is the cheapest flight from Denver to Seoul?

    In the last 3 days, the lowest price for a flight from Denver to Seoul was $320 for a one-way ticket and $843 for a round-trip.

  • Do I need a passport to fly between Denver and Seoul?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Denver and on arrival in Seoul.

  • Which airports will I be using when flying from Denver to Seoul?

    When flying out of Denver you will be using Denver Intl. You will be landing at one of these airports: Seoul Gimpo Intl or Incheon Intl.

  • Which aircraft models fly most regularly from Denver to Seoul?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Denver to Seoul?

    Star Alliance, oneworld, and SkyTeam are the airline alliances operating flights between Denver and Seoul, with Star Alliance being the most commonly used for this route.

  • What is the most popular layover when flying to Seoul from Denver?

    Vancouver is the most popular layover city among KAYAK users traveling from Denver to Seoul.

  • Which is the best airline for flights from Denver to Seoul, Korean Air or Asiana Airlines?

    The two airlines most popular with KAYAK users for flights from Denver to Seoul are Korean Air and Asiana Airlines. With an average price for the route of $1,230 and an overall rating of 8.4, Korean Air is the most popular choice. Asiana Airlines is also a great choice for the route, with an average price of $1,390 and an overall rating of 8.2.

  • How does KAYAK find such low prices on flights from Denver to Seoul?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Denver to Seoul.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Denver to Seoul?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seoul from Denver is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Denver to Seoul?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seoul with an airline and back to Denver with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Denver to Seoul?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seoul from Denver up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Denver to Seoul

  • Denver International Airport (DEN) serves as a hub for United Airlines, giving passengers who choose to fly United access to various flights, discounts, and perks.
  • United Airlines passengers can look forward to first-class comforts, including lie-flat seats, a wide selection of meal options, noise-canceling headphones, and high-speed Wi-Fi when traveling from Denver to Seoul. Alcoholic beverages, admission to the United Club, and pre-departure lounge amenities are all complimentary for First and Business class passengers.
  • Unaccompanied minors ages 8 to 16 are welcome on United Airlines flights from Denver to Seoul. Unaccompanied Minor Form completion and presentation of a legitimate photo ID are requirements for guardians of unaccompanied youngsters. In addition, United Airlines offers supplementary choices, including meet-and-greet services and unaccompanied minor notifications for added protection.
  • Delta Airlines offers the most accommodating pet policy for flights from Denver to Seoul. While they accept larger animals as cargo, they allow small cats and dogs to ride in the cabin. All dogs must be reserved at least 48 hours before, and an international health certificate is required. The carrier should not exceed 18 x 11 x 11 inches, must be leakproof and covered, and should provide enough comfort for the animal.
  • On flights from Denver to Seoul, United Airlines permits each passenger to bring one personal item and one regular carry-on bag. The carry-on bag can have a maximum size of 9 x 14 x 22 inches. There can be at most 40 lb per item.

Reviews of the top 5 airlines serving from Denver to Seoul

 
See real verified KAYAK customer reviews for airlines flying from Denver to Seoul. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Denver to Seoul? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.4
Korean AirOverall score based on 1139 reviews
8.7Crew
8.2Entertainment
8.3Comfort
8.1Food
8.5Boarding
Airline reviews

It was good, I liked the self-serve snacks but it was a little difficult to get the alcohol, which is understandable since I wouldn't want kids sneaking it.

8.0 ExcellentMatt, Aug 2025ATL - ICN
Read more Korean Air reviews

It was good, I liked the self-serve snacks but it was a little difficult to get the alcohol, which is understandable since I wouldn't want kids sneaking it.

Friendly flight attendants and gate agents. Very clean plane and food was good!

I normally love Korean Air, but this trip was not great. We boarded the plan and were settling into our seats. My son and I use these leg swings and we used it on the trip over to Cambodia, but on the way back the flight attendant very rudely told us we could not use it and that it was against regulations. I asked to see the regulation, but never saw it. The food on this trip was horrible as well, Even my son's kids meal was disgusting so we didn't eat anything on the flight. Thankfully we brought snacks. Entertainment - what happened to the games?

This was an amazing flight. The crew was great. The service was great. The food provided was great.

I was unable to select decent seats, and so I was stuck in the middle seat because it was selected for me

Korean air has a little bit more seating space than Asiana air.

There was a lot of partial tv shows but not enough to last the flight. The food was incredible! The crew were so helpful and patient. Lots more space than what I usually get on an international flight. Very comfortable!

Stingy on the drinks - 15 hour direct flight and could barely get attention for some water

Unfortunately, there has been a boarding and departure delay. However, as usual, the flight arrived earlier than the scheduled. There has been a turbulence in-between, it’s unavoidable. I couldn’t complain them.

Not many people, so you can lay down on two seats

Better screens, it would have been nice to have more comfortable seats.

2nd major delay due to maintenance issues. 1st delay missed my connecting flight.

It was great, but my bag was not loaded onto the connecting flight. I'm currently getting it resolved. If this isn't a problem, everything else was excellent.

Very clean ,flight attendants very professional,nice , Boarding was very easy

The plane hasnt left im stuck in seatle still my flight has been grounded for almost 5 hours

My luggage didn’t arrive with my flight. Flight was delayed by nearly 2 hours while we sat on the plane and I almost missed my connecting flight and subsequently missed the last train from the airport so it took me another 2 hours to get to my destination after arriving, Crew skipped me several times when offering beverages, and I couldn’t get their attention at times because they wouldn’t even make eye contact with me. They didn’t give me a form for disembarking so I had to go to the back of the line after waiting an eternity for immigration. Paid for on flight wi- fi that didn’t work for most of the flight.

Love flying Asiana. Been using it for over a decade now.

I had a bad experience coming from America to Thailand. On my connecting flight my check in suitcase was not put on the departing aircraft, I received my suitcase 24 hours after arriving in Bangkok and when I open my luggage my hand swelled up. The next morning when I put on an outfit from my suitcase my face swelled up and became numb. My entire vacation was ruined it seems that some kind of chemical was sprayed into suitcase and ruined my clothes and got me sick. The staff at my hotel called the airline and spoke to someone and they told me to file a complaint and gave my a website to do so. I did not file a complaint I felt like it would have fell on death ears. I had to throw away my brand new vacation clothes and suitcase and I had the worst vacation ever due to this happening to me.

The staff was courteous and the flight was very smooth. It was so nice to see the captain greeting the passengers at the end of the flights.

The beefsteak on the lunch menu was excellent! I usually do not eat airplane food. I loved it.

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

The food was terrible especially for a 15 hour international flight. The crew was unpleasant as well.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Quick check in. Everything went smooth. I don't know what can be done about airline food.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

Nothing special. The crew never went out of their way for anything.

Three seats in first class were broken and while they were able to still acommodate us it was looking very touch and go and they had others they could not acommodate

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

The seat and leg room was not good. The food and beverage service was good.

For economy, it was very good. Staff was great, they even let some of us change seats for more leg room... Put an empty seat between us which was fantastic for a 12hr flight. Onboard entertainment was excellent, I think over 200 choices of movies/tv/etc The bad was the barely/nonfunctional wifi that cost either $16.99 or 1700 miles (full flight). It was atrocious... Definitely the worst of the last 3 long haul major airlines I was on the last few months.

Electric plugs didn't work. Entertainment system wasn't working

The design of the light switch on the arm rest is ridiculous.

The gate attendant let me walk right by her with a bag too big for the overhead compartment

Overall, it was a good experience. Boarding was good and there was plenty of overhead bin space for everyone’s carryons (even when we boarded toward the end). Only improvement would be to offer trash service more regularly.

David went above and beyond to make our flight the best that it could be

No food service almost missed because of first flight delays

For the price, it was a really good experience. There was no entertainment on board, so I couldn't really rate this, and I didn't order a meal. I appreciated that there was a free glass of wine.

Short flight. Everything was fine except the flight was delayed twice for a total of an hour.

My flight from New York to Canada and Canada to Brisbane was canceled, so I had to take united airlines instead flight from New York to Dubai then layover in Dubai 8 hours then from Dubai to Brisbane it was extremely difficult for me , it was a nightmare flying with Canadian airlines unfortunately.

I found the boarding easy and my seat was very comfortable as I had a lot of leg room. I am not too happy that I no longer have lounge access even though I used to get it with my TD credit card.

Flight cancelled. Major disruption to our travel. Do not use Air Canada from KC. To few flights.

Real smooth and easy, Real good leg room in coach!

There labor disputes cancelled my flight less than 24 hours before my boarding time but there customer service/website was easy enough to navigate and they rebooked me for no upcharge.

Re luggage I carried a backpack only. I did not check any bags in. However there were other passengers with carry on luggage going in the plane. My question is why are others allowed to have a carry on luggage inside the plane? Shouldn’t they have dropped it off at the gate? I’m asking because I could have brought the same thing instead of a backpack only. Please clarify for future reference. Thank you.

Like the service. Very hard to communicate or contact when have problems

Very bad, flight was cancelled due to strike and staff was unable to rebook us

Everything you need to know for your flight from Denver to Seoul

Information on your arrival and departure airports

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