$2,240+ Cheap flights from District of Columbia 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 12/2. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — USN
Nov 30 — Dec 71
1 adult, Economy
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Cheapest flights from District of Columbia to UlsanExplore the most affordable flight options available from District of Columbia to Ulsan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 31, 2025.
Explore the most affordable flight options available from District of Columbia to Ulsan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 31, 2025.
This Trip.com deal was found by Cheapflights users on 10/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/211:10 amIAD - USN
2 stops36h 35mMultiple Airlines
Sun 12/282:25 pmUSN - IAD
2 stops32h 45mMultiple Airlines
Deal found 10/28![Multiple Airlines logo]()
$2,240
Cheap flight deals from District of Columbia to Ulsan
Keep the following information in mind while searching for District of Columbia to Ulsan flight deals. Data was last updated October 31, 2025.
Round-trip from | $2,240 (Trip.com) |
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Cheapflights Fare Finder
Customize your flight search to find flights from District of Columbia 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 October 31, 2025.
Use the filters below to find and compare flights from District of Columbia to Ulsan that are best for you.
Fly from
District of Columbia
Fly to
Ulsan
Route
Depart
Return
Price
Washington, D.C.Ulsan
IAD - USN
IADUSN
Washington, D.C. Dulles Intl
Tue 12/2
11:10 am-1:45 pm
2 stops36h 35m
Ulsan
Sun 12/28
2:25 pm-9:10 am
2 stops32h 45m
$2,240
Best time to book a flight from District of Columbia to Ulsan
Have a flexible travel schedule? Discover the best time to fly to Ulsan from District of Columbia 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 District of Columbia to Ulsan
What is the cheapest time of day to fly from DC to USN?
Find hourly flight availability from District of Columbia 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 October 31, 2025.
Unlike at noon, when flights are generally more expensive, you can save up to 30% on flights from District of Columbia to Ulsan by exploring options for tickets in the morning.
What is the cheapest day to fly from District of Columbia to Ulsan?
Use this chart to determine the cheapest time to fly round-trip from District of Columbia to Ulsan. Price data was last updated on March 30, 2025.
Travelers seeking maximum savings on their District of Columbia to Ulsan flight should consider departing on Wednesday at noon when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.