Travel from South Korea to the United States is conditional — see requirements below
This is the generic answer for any South Korea citizen. Not legal or medical advice — verify with your airline and destination authorities before travel.
South Korea passport holders can travel to the United States without a visa for stays of up to 90 days.
This is the generic case for any South Korea citizen. Sign in (free) to personalize this United States analysis for your passport, vaccinations & connecting flights.Personalize →Generic country-level guidance for United States. Verify against the official source before you travel.
This page covers a direct flight to United States. If your route connects through a third country, that country may require its own transit visa — sometimes even for a short stop inside the airport between flights (a layover). Transit rules depend on your specific routing, so check the country you connect through separately, or analyse your full itinerary.
No visa required for entry to United States. Stays of up to 90 days are permitted under the visa-waiver agreement.
Year-round averages. Warm band = typical daily low to high (°C); blue bars = typical rainfall (mm). Hover or tap a month for details.
Warmest around Jul (~29°C); wettest around Aug (~113mm).
This page covers the generic case for any South Korea citizen. Sign in (free) and create a traveler profile to factor in your specific passport expiry, vaccinations, previous visas held, and connecting flights — and get the same analysis for your exact itinerary.
Sign in (free) & build your profile →You're travelling to United States (US). Your home cellular plan may or may not include data abroad — check your carrier's international options before you fly. An eSIM is a low-commitment alternative if your plan doesn't cover the destination or charges high roaming rates.
United States (US) screens applicants and arriving travellers against criminal records (application declaration). If your history is clean, no action — proceed normally. If you've ever been convicted of anything, two things matter: (1) any visa or entry-permit application asks the question, and answering 'no' when the answer is 'yes' is itself grounds for refusal even if the original conviction wouldn't have been; (2) some categories trigger denial regardless — the canonical examples are DUI for Canada and drug-related convictions for Japan. Research waivers / rehabilitation routes well before booking if either applies to you.
Declare USD 10,000 or equivalent when entering or leaving South Korea (KR). Form: Customs declaration. Declare USD 10,000+ equivalent
Declare USD 10,000 or equivalent when entering or leaving United States (US). Form: FinCEN Form 105. Must declare $10,000+ in currency/monetary instruments on entry or exit
United States (US) requires every traveller to submit the US Customs Declaration for entry — best done a few days before departure rather than in the airport queue. Without it, expect to be pulled aside at the border or denied boarding. Apply at: https://www.cbp.gov/travel
United States's entry rules ask for proof you'll leave the country, but visa-waiver / ETA travelers like you usually get waved through without check-in agents looking. Have a screenshot of your return flight (or any onward ticket) on your phone in case they do — answers the question instantly.