Incheon International (ICN) to Heathrow (LHR).
| Departure | Return | Price |
|---|---|---|
| 06/10/2026 | 06/17/2026 | $775 |
| 07/01/2026 | 07/06/2026 | $778 |
| 06/10/2026 | 06/15/2026 | $782 |
| 05/26/2026 | 05/31/2026 | $802 |
| 05/26/2026 | 06/01/2026 | $802 |
| 05/26/2026 | 06/02/2026 | $802 |
| 05/26/2026 | 06/03/2026 | $802 |
| 05/26/2026 | 06/04/2026 | $802 |
| 05/27/2026 | 06/01/2026 | $802 |
| 05/27/2026 | 06/02/2026 | $802 |
Based on current fares, June is the cheapest month to fly from Seoul to London, with average fares around $838 round trip (as low as $775).
August tends to be more expensive, averaging $1032.
See the full month-by-month and day-of-week price analysis
Best Time to Fly ICN → LHRDeparture date prices (economy, round trip). Green = cheap, red = expensive.
The cheapest month to fly from Seoul to London is June, with average round-trip fares around $838. Fares in June start as low as $775. The most expensive month is August, averaging $1032.
A nonstop flight from Seoul to London takes approximately 11h 30m.
The cheapest flight from Seoul to London currently starts at $775 round trip in economy class.
The average round-trip flight price from Seoul to London is $938 in economy class.
The distance is 5510 miles (8866 km). with a nonstop flight time of about 11h 30m. The lowest fare currently available is $775 departing in June. The average round-trip fare is $938.
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