Route brief · WAS → SEL
Washington → Seoul
$1,004
−3% vs typical
seasonal median $1,040 · difference $36
Oct 26 – Nov 2 · 7 nights
Air PremiaNonstop
- Usual monthly lows
- $1,038–$1,042
- Board rank
- Stronger than 2%
- Route sample
- 4 observed months
Cached fare — the booking search re-prices live before you pay.
Destination briefSELSeoulPalaces wedged between skyscrapers, barbecue smoke at midnight, cafés that outnumber people.Best windowApr–May · Sep–OctAirportsIncheon (ICN) · Gimpo (GMP)All routes into SeoulWhen this route gets cheap.
Cached-fare history: across 4 months, Oct is the cheapest for WAS → SEL. Best time to be there: Apr–May · Sep–Oct.
Fares on this route stay within about $102 across the 4 months we track — season matters less here than timing the drop. The cheapest itinerary we are tracking flies Air Premia nonstop and takes about 16 hours outbound, on a 7-night trip. At $1,004 for 11,165 km each way, that works out to about $45 per 1,000 km flown. That is about the $40 typical of ultra-long-haul fares here. Across the 25 departure cities we track at a similar distance from Seoul, this fare ranks 22nd — 2.0× the $505 we hold from Athens. For context, the middle fare among the 22 routes of similar length we watch out of Washington is $966.
The 6 days we hold a cached fare for
Tap a date → live search
The median cached fare across this calendar is 6% higher than when tracking began on Aug 8 — $1,031 then versus $1,089 now, across 4 recorded snapshots. This is a calendar-level trend, so an individual deal above can be lower. The lowest single day we have seen here is $913, on Nov 10.
- Tue, Sep 15$1,097
- Thu, Oct 15$1,080
- Thu, Oct 22$1,071
- Fri, Oct 23$1,105
- Sat, Oct 24$1,172
- Wed, Nov 11$962
These are the only days we have a cached price for on this route so far — not the only days it flies. The search above covers any date.
Cheapest in Oct · around $1,004
3% below the $1,040 typical fare
Cheapest round-trip fare found per month · Washington → Seoul · cached-price history
Route facts
- Airports
- Dulles (IAD) · Reagan National (DCA) · Baltimore (BWI) ↔ Incheon (ICN) · Gimpo (GMP)
- Flight time
- ~16 hours outbound
- Distance
- ~11,165 km each way
- Typical price
- $1,040 round-trip (seasonal median)
- Airlines on the board
- Air Premia
- Itineraries
- Nonstop available
- Best months to visit
- Apr–May · Sep–Oct
WAS → SEL, answered.
Is $1,004 a good price for Washington to Seoul?
Only slightly. The seasonal median is around $1,040 round-trip and this fare is 3% under it, about $36. We do not call a drop notable until 20%, so this is an ordinary price for the route rather than a reason to hurry.
What is the cheapest month to fly from Washington to Seoul?
Across 4 months of cached-fare history, Oct comes out cheapest on this route. The best months to actually be in Seoul are Apr–May · Sep–Oct — when those overlap, that's your window.
How far in advance should I book WAS → Seoul?
We do not publish a number for this, because we cannot measure it yet. Answering it honestly means watching the same departure date on this route over many weeks as it approaches, and that archive is still filling up — so any "book N days ahead" figure here would be borrowed from somewhere else rather than measured. What we can measure is which month is cheap: across 4 months of cached fares, Oct comes out lowest on this route. See /guides/what-moves-a-flight-price/ for what does move a fare.
Are there nonstop flights from Washington to Seoul?
Yes — the current board includes nonstop fares (Air Premia). The outbound leg runs around 16 hours.
Are these prices guaranteed?
No — these are cached fares found on real searches (this one on September 1). Airlines reprice constantly, so the booking search re-checks the live price before you pay. Fresher finds are far more likely to still be available.
Next step
Sleeping in Seoul?
Lock the flight first — then compare stays for Oct 26 – Nov 2 · 7 nights.
Browse hotels ↗
Missed it?
Cached fares expire. This route has a feed of its own — follow it and the next WAS → SEL drop reaches you as soon as we find it.
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