Is it worth paying for first class instead of business?

For flights to Seoul, business class is usually sufficient. Korean Air and Asiana business cabins are top-tier and provide lie-flat beds, which are more than adequate for a good rest.

Should I book directly with the airline or through a travel agent?

Always book directly with the airline. If there is a delay or cancellation, rebooking is significantly easier when you deal directly with the carrier's support team rather than a third-party site.

Booking the Best Business Class Flights to Seoul

Book 3 to 4 months in advance using Google Flights to track price trends, and prioritize direct routes on Asiana or Korean Air to avoid long layovers. Use airline-specific mileage programs to search for reward seat availability before booking cash fares.

Use Google Flights 'Track Prices'. Input your departure city and Seoul (ICN). Toggle 'Track prices' on. Set a calendar alert to notify you when prices drop below the historical average for your specific route.
Compare Business Class Cabins. Not all business class is equal. Use SeatGuru or AeroLOPA to check the seat configuration. Aim for 'reverse herringbone' or 'staggered' layouts for direct aisle access, especially on 12+ hour flights.
Leverage Airline Alliances. If you are flying from the US, check Star Alliance (United/Asiana) and SkyTeam (Delta/Korean Air). These partnerships allow you to book a flight with a US carrier but operate on the Korean partner's metal, which often results in better lounge access.
Check Incheon Airport (ICN) Arrival Times. Aim for an arrival between 6:00 AM and 10:00 AM. This allows you to clear customs and reach your accommodation by check-in time, helping you beat jet lag by staying awake through your first day.

Is it worth paying for first class instead of business?: For flights to Seoul, business class is usually sufficient. Korean Air and Asiana business cabins are top-tier and provide lie-flat beds, which are more than adequate for a good rest.
Should I book directly with the airline or through a travel agent?: Always book directly with the airline. If there is a delay or cancellation, rebooking is significantly easier when you deal directly with the carrier's support team rather than a third-party site.