Cheap flights from Dulles Intl (IAD) to Ulsan (USN)
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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 December 28, 2025.
Most accurate provider | eDreams 3 stars |
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Most trusted provider | eDreams 3 stars |
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.
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?
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?
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 19% of weekly flights between Washington, D.C. and Ulsan have experienced delays in the past year, with the average delay time being 124 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 evening 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 Sunday 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, Contour have had the lowest number of delays on this route, with just 20% of flights being delayed.