June is the cheapest month to fly this route, with average fares around $838 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $860 | $802 | ||
| June 2026 | $838 | $775 | Best | |
| July 2026 | $927 | $778 | ||
| August 2026 | $1032 | $984 | Peak |
Departing on Thursday offers the lowest average fares at $853. Monday departures are the most expensive at $912, a difference of $59.
The best time to fly is June. Set up an alert and we'll notify you when prices drop.
Get Started Free →The cheapest month to fly from Seoul to London is June, with average round-trip fares around $838. The lowest fare found in June is $775.
Thursday departures are the cheapest, averaging $853 round trip. The most expensive day is Monday at $912.
Based on current pricing trends, booking for June travel offers the best value. Avoid August if possible, as fares average $1032 compared to $838 in the cheapest month. July is a solid middle-ground option at $927.
Flying in June instead of August can save you approximately $194 per round trip. The cheapest month averages $838 while the most expensive averages $1032.
Airlines, flight times, price calendar, and more for Seoul to London
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