Flights to Seoul from the US: Nonstop Routes, Incheon Terminals and When to Fly

Quick answer: Seoul Incheon (ICN) has nonstop flights from more than a dozen US cities. West Coast flights take about 12 to 13.5 hours, the East Coast about 14.5 to 15. Korean Air, Delta, United and Air Premia fly most routes, and Asiana merges into Korean Air on December 17, 2026.

Seoul flights at a glance

Nonstop flights to Seoul from US cities

Airlines and frequencies are as of recent schedules and change by season, so check with the airline; times are westbound, and flights back to the US take about one to two hours less. Asiana leaves Star Alliance on December 16, 2026 and its flights run as Korean Air from December 17, 2026; check your booking for the new flight details. Delta and Korean Air run a joint venture and sell each other's seats, so a Delta ticket may be flown by Korean Air.

Best time to book and when fares are typically lower

Seoul is busiest in April for the cherry blossoms, in October for autumn colour, in July and August for summer holidays, and around the two big Korean holidays, Seollal (Lunar New Year, usually late January or February) and Chuseok (usually September or early October), when flights are full of people travelling to see family.

January and February, outside Seollal, and late November are usually the quietest months, and that is when fares to Seoul are typically at their lowest. They are also the coldest months, often well below freezing, though skies are frequently clear. Late June brings the start of the rainy season.

To keep the cost down, compare the nonstop from your own airport with a one-stop through a West Coast city, compare midweek and weekend departures, and look at what each fare family includes. Way4Fly's search shows live airline fares for your exact dates.

Major airlines flying to Seoul from the US

Korean Air flies the most US routes to Seoul, and it runs a joint venture with Delta across the Pacific, so Delta flights from Atlanta, Detroit, Minneapolis, Salt Lake City and Seattle connect with Korean Air at Incheon on one ticket. Both are SkyTeam members.

Asiana Airlines is in its last weeks as a separate airline. It leaves Star Alliance on December 16, 2026 and merges into Korean Air the next day, so its flights from Los Angeles, San Francisco, New York and Honolulu become Korean Air flights. If you are booking for travel after mid-December, expect Korean Air and SkyTeam rules, not Asiana and Star Alliance ones.

United flies to Seoul from San Francisco and, since September 4, 2026, daily from Newark. Air Premia, a Korean airline with a premium economy cabin and economy, flies from Los Angeles, San Francisco, Newark, Honolulu and, since April 2026, Washington Dulles, several days a week on some routes.

Incheon Terminal 1 or Terminal 2: which one is yours?

Incheon has two terminals several miles apart, linked by a free shuttle bus and by the airport railway. Terminal 2 serves Korean Air, Delta and the other SkyTeam airlines, and Asiana moved there on January 14, 2026. Terminal 1 serves United, the other Star Alliance airlines and Air Premia.

The terminal follows the airline flying the plane, not the one on your ticket. A Delta ticket on a flight operated by Korean Air uses Terminal 2, and any ticket on a flight operated by United or Air Premia uses Terminal 1. Check the operating airline on your booking before you head back to the airport.

Korean Air finished rebuilding its Terminal 2 lounges in April 2026. The First Class Lounge is for Korean Air first class passengers, and the Prestige lounges are generally open to Korean Air and SkyTeam business class passengers and SkyTeam Elite Plus members; check the current access rules with Korean Air.

Getting from Incheon into Seoul

The AREX airport railway is the quickest way in. The express train runs nonstop to Seoul Station in about 43 minutes from Terminal 1 and about 51 minutes from Terminal 2, with reserved seats and space for luggage. The all-stop train is slower and cheaper and calls at Gimpo Airport and Hongik University, where it links with the subway.

Airport limousine buses leave from both terminals for hotels and districts all over Seoul and beyond, and they are often easier than the train with heavy bags or if your hotel is not near Seoul Station. Taxis run from the marked ranks outside arrivals; the trip takes about an hour or more depending on traffic.

Entry rules for US citizens: K-ETA and the e-Arrival card

US citizens can visit South Korea without a visa for tourism or short business trips of up to 90 days. Korea normally asks visa-free visitors for a K-ETA, an online travel authorization, but US citizens are temporarily exempt from January 1 to December 31, 2026 (Korea time), according to Korean consulates in the US.

While the exemption runs, you fill in the free e-Arrival card online instead, up to three days before you land; travellers who apply for a K-ETA anyway do not need the arrival card. For arrivals in 2027, check the official K-ETA website before you fly, because no further extension had been announced as of November 2026. Use only official government sites for either form.

Time difference and jet lag

Seoul is on Korea Standard Time all year, with no daylight saving. From early November to mid-March it is 14 hours ahead of New York and 17 ahead of Los Angeles; during US daylight saving time the gap is one hour less. Because of the date line, you land the day after you leave, and on the way home you can arrive in the US before the time you left Seoul.

Many flights from the US leave around midday and land in Seoul in the late afternoon or evening, which makes it easier to stay up until a normal bedtime. Late-night departures land around dawn; plan a quiet first day if you take one.

Frequently asked questions

Travel guide

April (cherry blossoms) and October (autumn colour) are the most popular months for Seoul. January and February are cold but typically quieter for flights, outside the Lunar New Year holiday; July and August are hot, humid and wet.

Lounge access

• Korean Air First Class Lounge, Terminal 2
• Korean Air Prestige Lounges (East, West and Prestige Garden), Terminal 2
• Korean Air Miler Club, Terminal 2

Airport transfers

AREX express trains run nonstop to Seoul Station in about 43 minutes from Terminal 1 and about 51 minutes from Terminal 2; the all-stop AREX train is slower but links with the subway, and airport limousine buses serve hotels and districts across the city.

Flight route guides to Seoul

Each guide covers the airlines on that route, typical connections, the best months to fly and baggage rules, with live fares fetched when the page loads.

• Baltimore to Seoul flights
• Detroit to Seoul flights
• Washington to Seoul flights
• Minneapolis to Seoul flights
• Chicago to Seoul flights
• Phoenix to Seoul flights
• San Diego to Seoul flights
• Seattle to Seoul flights
• San Francisco to Seoul flights
• St. Louis to Seoul flights
• Tampa to Seoul flights

All route guides to Seoul