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Ulsan

$1,787+ Cheap flights from Dulles Intl (IAD) to Ulsan (USN)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — USN
Jul 7 — Jul 141
Mon 7/7
Mon 7/14
1 adult, Economy
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Cheap flight deals from Dulles Intl to Ulsan

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Ulsan (USN). 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 July 2, 2025.

Round-trip from

$1,787
(Korean Air)

Popular in

December

Cheapest in

January

Average price

$2,144
From Washington, D.C. Dulles Intl to Ulsan
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($56 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($58 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
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Find flight deals from Dulles Intl to Ulsan

Cheapest flights from Dulles Intl to Ulsan
Explore the most affordable flight options available from Dulles Intl to Ulsan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 2, 2025.

This Korean Air deal was found by Cheapflights users on 7/2. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/181:30 pmIAD - USN
1 stop29h 50mKorean Air
Mon 9/18:15 pmUSN - IAD
1 stop27h 40mKorean Air
Deal found 7/2$1,787

Cheapflights Fare Finder

Customize your flight search to find flights from Dulles Intl to Ulsan 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 July 2, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Ulsan that are best for you.

Fly from

Dulles Intl

Fly to

Ulsan

Route

Depart

Return

Price

Washington, D.C.Ulsan

IAD - USN

IADUSN

Washington, D.C. Dulles Intl

Mon 8/18

1:30 pm-8:20 am

1 stop29h 50m

Ulsan

Mon 9/1

8:15 pm-10:55 am

1 stop27h 40m

$1,787

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Best time to book a flight from Dulles Intl to Ulsan

Have a flexible travel schedule? Discover the best time to fly to Ulsan from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to Ulsan

What is the cheapest time of day to fly from IAD to USN?

Find hourly flight availability from Dulles Intl to Ulsan. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 2, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 46% on flights from Washington, D.C. Dulles Intl Airport to Ulsan by exploring options for tickets in the morning.

What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to Ulsan?

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Ulsan. Price data was last updated on March 30, 2025.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Ulsan flight should consider departing on Wednesday at noon when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Ulsan

Get insights into the airlines that provide service to Ulsan. 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 Ulsan. Reviews last updated July 2, 2025.
Read reviews from past customers who have flown Korean Air from Washington, D.C. Dulles Intl Airport to Ulsan. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,101 reviews

Entertainment

8.2

Food

8.1

Crew

8.7

Comfort

8.3

Boarding

8.5

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
1,101 reviews
Korean Air
8.4
Very good
1,101 reviews

Entertainment

8.2

Food

8.1

Crew

8.7

Comfort

8.3

Boarding

8.5

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 Dulles Intl to Ulsan. 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 into for flights to Ulsan from Washington, D.C. Dulles Intl?

    Ulsan (USN) is the airport you will fly into if you book a flight from Washington, D.C. Dulles Intl to Ulsan. You should not have trouble finding flights to Ulsan from Washington, D.C. Dulles Intl; the airport handles an average of 0 inbound flights from Washington, D.C. Dulles Intl per day. You should also have plenty of airline options to choose from since 0 airlines have flights to the Ulsan airport from Washington, D.C. Dulles Intl. It is only a 4.4 mi journey from Ulsan (USN) to Ulsan’s city center.

  • Can I find deals for flights from Dulles Intl to Ulsan that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Ulsan flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Ulsan?

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

  • Can I find deals for business class flights from Dulles Intl to Ulsan?

    Yes. Cheapflights offers flight deals from Dulles Intl to Ulsan by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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