Finding cheap flights to Seoul usually depends on how much flexibility you have around dates and departure airports. Fares can vary during Seoul’s popular spring blossom and autumn foliage periods, as well as UK school holidays, Christmas and New Year. Travelling just outside these busy periods may widen the choice of fares, while checking several nearby departure dates can reveal useful differences without committing to an inconvenient itinerary.

London airports typically offer the broadest range of journeys to South Korea, but fares from Manchester, Birmingham, Edinburgh and other UK airports can sometimes be worth comparing, particularly when the cost of reaching London is included. Seoul’s main international gateway is Incheon, so the overall journey should allow for the onward airport-rail, bus or taxi transfer into the city. A lower fare may be less attractive if it involves a long connection, separate tickets, restrictive baggage rules or an expensive overnight stay near the airport.

Prices can change as seats sell, so beginning your search well ahead of the intended trip and monitoring suitable options is sensible, especially for peak travel dates. Flexible-date fare calendars can help identify patterns, while comparing direct and connecting itineraries shows whether a saving justifies the extra travel time. Always review the final total, including luggage and airport transfers, before booking.

For travellers comparing flights to Seoul from the UK, the best departure point may depend as much on the journey to the airport as on the flight itself. London airports can offer a wider range of itineraries, while travellers in Scotland, Wales, Northern Ireland or England’s regions may prefer to start closer to home and accept a connection. If reaching a different UK airport involves a separate train or flight, allow plenty of time between bookings and check whether baggage can be transferred through.

Seoul is served by two principal airports. Incheon is the main gateway for international itineraries and lies west of the city, while Gimpo is closer to central Seoul and handles domestic and some regional international services. From Incheon, the airport railway, all-stop trains, airport buses and taxis provide onward travel into Seoul; Gimpo also has straightforward rail and road links, with the most convenient option depending on your neighbourhood and arrival time. Check the final airport carefully when comparing connections, as changing between Incheon and Gimpo is not a simple terminal transfer.

Beyond the headline fare, compare total journey time, connection length, baggage arrangements and whether a change requires moving between terminals. An itinerary arriving earlier may make rail travel easier, while a late arrival could make a direct taxi or pre-arranged transfer more practical.