$8,884+ 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 3/29. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — USN
Mar 15 — Mar 221
1 adult, Economy
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Cheapest flights from Dulles Intl to UlsanExplore 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 February 13, 2026.
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 February 13, 2026.
This Mytrip deal was found by Cheapflights users on 2/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/2912:15 pm
IAD
- USN
2 stops31h 05m
Multiple Airlines
Sun 4/59:00 am
USN
- IAD
3 stops39h 35m
Multiple Airlines
Deal found 2/12![Multiple Airlines logo]()
$8,884
Best flights from Dulles Intl to UlsanDiscover carefully curated flight deals from Dulles Intl to Ulsan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 13, 2026.
Discover carefully curated flight deals from Dulles Intl to Ulsan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 13, 2026.
This Mytrip deal was found by Cheapflights users on 2/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/2912:15 pm
IAD
- USN
2 stops31h 05m
Multiple Airlines
Sun 4/59:00 am
USN
- IAD
3 stops39h 35m
Multiple Airlines
Deal found 2/12![Multiple Airlines logo]()
$8,884
Last-minute flights from Dulles Intl to UlsanDiscover last-minute flight deals from Dulles Intl to Ulsan. Data last updated February 13, 2026 and is based on user searches.
Discover last-minute flight deals from Dulles Intl to Ulsan. Data last updated February 13, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 2/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/2912:15 pm
IAD
- USN
2 stops31h 05m
Multiple Airlines
Sun 4/59:00 am
USN
- IAD
3 stops39h 35m
Multiple Airlines
Deal found 2/12![Multiple Airlines logo]()
$8,884
Find 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 February 13, 2026.
Round-trip from | $8,884 (Mytrip) |
|---|
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 February 13, 2026.
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
Sun 3/29
12:15 pm-8:20 am
2 stops31h 05m
Ulsan
Sun 4/5
9:00 am-11:35 am
3 stops39h 35m
$8,884
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.
IAD-USN
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
Prices
Delays
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 February 13, 2026.
Unlike at noon, when flights are generally more expensive, you can save up to 45% 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.
How often are flights from Washington, D.C. to Ulsan delayed?
About 15% of weekly flights between Washington, D.C. and Ulsan have experienced delays in the past year, with the average delay time being 151 minutes.
What is the most punctual flight time for Washington, D.C. to Ulsan flights?
Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Tuesday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Washington, D.C. to Ulsan flights?
Over the last year, United Airlines have had the lowest number of delays on this route, with just 16% of flights being delayed.
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.
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