What day of the week experiences the fewest flight delays on this route?

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

How often are flights from Washington, D.C. to Ulsan delayed?

Historically, on average around 19% of flights between Washington, D.C. and Ulsan have experienced a delay on any given week. The average delay length over the past 12 months has been 128 minutes.

Which airline has the best punctuality record on Washington, D.C. to Ulsan flights?

According to our data, American Airlines have had the least number of delays on this route over the last 12 months; with about 9% of their flights experiencing any sort of delay.

What is the most punctual flight time for Washington, D.C. to Ulsan flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

How long does it take to fly to Ulsan?

Flight times from Washington, D.C. to Ulsan vary, but if you’re flying out of Baltimore and flying into Busan (one of the most popular routes), then the duration is 23h 30m on average. Another popular route from Washington, D.C. to Ulsan is flying from Washington, D.C. to Busan, which will take roughly 26h 55m. Keep in mind that layovers or delays could extend your travel time.

When did momondo last update prices for flights from Washington, D.C. to Ulsan Airport?

Prices for flights from Washington, D.C. to Ulsan Airport are updated daily.

How old do you have to be to fly from Washington, D.C. to Ulsan Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. to Ulsan Airport.

What documentation or ID do you need to fly to Ulsan Airport?

The required travel and health documents for your Ulsan Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ulsan Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$492 Cheap Flights from Washington, D.C. to Ulsan in 2026

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USN

7016 mimulti-stop

USN

WAS

7016 mimulti-stop

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Fly from

Fly to

Route

Depart

Return

Price

Cheapest one-way

Quickest one-way

Washington, D.C.Ulsan

IAD - USN

IADUSN

Washington, D.C. Dulles Intl

Fri 8/28

1:20 pm-8:20 am

1 stop30h 00m

$512

Washington, D.C.Ulsan

IAD - USN

IADUSN

Washington, D.C. Dulles Intl

Wed 8/26

1:20 pm-8:20 am

1 stop30h 00m

$522

Washington, D.C.Ulsan

IAD - USN

IADUSN

Washington, D.C. Dulles Intl

Thu 8/27

8:39 pm-8:20 am

3 stops46h 41m

$528

Washington, D.C.Ulsan

IAD - USN

IADUSN

Washington, D.C. Dulles Intl

Sun 8/30

8:39 pm-8:20 am

3 stops46h 41m

$555

Washington, D.C.Ulsan

IAD - USN

IADUSN

Washington, D.C. Dulles Intl

Fri 8/28

1:20 pm-10:30 am

2 stops32h 10m

$565

Washington, D.C.Ulsan

IAD - USN

IADUSN

Washington, D.C. Dulles Intl

Wed 8/26

1:20 pm-10:30 am

2 stops32h 10m

$566

Washington, D.C.Ulsan

IAD - USN

IADUSN

Washington, D.C. Dulles Intl

Wed 8/26

7:00 am-2:25 pm

3 stops42h 25m

$617

Washington, D.C.Ulsan

IAD - USN

IADUSN

Washington, D.C. Dulles Intl

Sat 8/29

8:59 am-7:55 pm

3 stops45h 56m

$631

Washington, D.C.Ulsan

IAD - USN

IADUSN

Washington, D.C. Dulles Intl

Mon 8/31

8:59 am-7:55 pm

3 stops45h 56m

$646

Washington, D.C.Ulsan

IAD - USN

IADUSN

Washington, D.C. Dulles Intl

Tue 9/1

8:39 pm-8:20 am

3 stops46h 41m

$649

Flights are sorted by cheapest round-trip flights first.

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How to get the cheapest flight ticket from Washington, D.C. to Ulsan

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Airlines

Delays

Other information

What is the cheapest airline that flies from Washington, D.C. to Ulsan?

Korean Air is the most popular carrier operating from Washington, D.C. to Ulsan

When to book flights from Washington, D.C. to Ulsan

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. to Ulsan according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Washington, D.C. to Ulsan (WAS to USN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to Ulsan

Fastest flight time	33h 35m
Direct flights	None

The fastest flight from Washington, D.C. to Ulsan takes 33h 35m

There are no direct flights from Washington, D.C. to Ulsan. There are no popular flight routes from Washington, D.C. to Ulsan.

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Frequently asked questions about flying from Washington, D.C. to Ulsan

How far is Washington, D.C. to Ulsan by plane?
A flight from Washington, D.C. to Ulsan will travel around 7020.3 mi. Flights usually cover this in 33h 35m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Washington, D.C. to Ulsan Airport?
Prices for flights from Washington, D.C. to Ulsan Airport are updated daily.
How old do you have to be to fly from Washington, D.C. to Ulsan Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. to Ulsan Airport.
What documentation or ID do you need to fly to Ulsan Airport?
The required travel and health documents for your Ulsan Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ulsan Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Ulsan?

It is quick and easy to find Washington, D.C. to Ulsan flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Ulsan that suits you.

Can I find flights from Washington, D.C. to Ulsan with flexible booking policies on momondo?

momondo does allow users to show only those flights to Ulsan from Washington, D.C. which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Washington, D.C. to Ulsan?

momondo helps you find the best flight between Washington, D.C. and Ulsan by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Washington, D.C. to Ulsan right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Washington, D.C. to Ulsan now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Ulsan and let you know when they change.