Route brief · BKK → SEL
Bangkok → Seoul
$171
−40% vs typical
seasonal median $285 · difference $114
Sep 20 – Sep 27 · 7 nights
T'way AirNonstop
- Usual monthly lows
- $250–$313
- Board rank
- Stronger than 89%
- Route sample
- 10 observed months
Cached fare — the booking search re-prices live before you pay.
Destination briefSELSeoulPalaces wedged between skyscrapers, barbecue smoke at midnight, cafés that outnumber people.Best windowApr–May · Sep–OctAirportsIncheon (ICN) · Gimpo (GMP)All routes into SeoulWhen this route gets cheap.
Cached-fare history: across 10 months, Sep is the cheapest for BKK → SEL. Best time to be there: Apr–May · Sep–Oct.
Fares bottom out in September around $171 and peak in April near $389 — a $218 spread across the 10 months we track. The cheapest itinerary we are tracking flies T'way Air nonstop and takes about 5.5 hours outbound, on a 7-night trip. At $171 for 3,722 km each way, that works out to about $23 per 1,000 km flown. That is well under the $39 that medium-haul fares on this board typically run. It is also the cheapest of the 8 routes of similar length we watch out of Bangkok.
Cheapest day in the next 3 months: Sep 20 · $183 (34% below median)
Tap any day → live search
The median cached fare across this calendar is 6% lower than when tracking began on Aug 8 — $282 then versus $266 now, across 5 recorded snapshots. This is a calendar-level trend, so an individual deal above can be lower. The lowest single day we have seen here is $180, on Sep 20.
September 2026
October 2026
Cheapest in Sep · around $171
40% below the $285 typical fare
Cheapest round-trip fare found per month · Bangkok → Seoul · cached-price history
Route facts
- Airports
- Suvarnabhumi (BKK) · Don Mueang (DMK) ↔ Incheon (ICN) · Gimpo (GMP)
- Flight time
- ~5.5 hours outbound
- Distance
- ~3,722 km each way
- Typical price
- $285 round-trip (seasonal median)
- Airlines on the board
- T'way Air
- Itineraries
- Nonstop available
- Best months to visit
- Apr–May · Sep–Oct
BKK → SEL, answered.
Is $171 a good price for Bangkok to Seoul?
Yes — the seasonal median for this route is around $285 round-trip. At $171 you're 40% below that, saving about $114, which we rate rare for this route.
What is the cheapest month to fly from Bangkok to Seoul?
Across 10 months of cached-fare history, Sep comes out cheapest on this route. The best months to actually be in Seoul are Apr–May · Sep–Oct — when those overlap, that's your window.
How far in advance should I book BKK → Seoul?
We do not publish a number for this, because we cannot measure it yet. Answering it honestly means watching the same departure date on this route over many weeks as it approaches, and that archive is still filling up — so any "book N days ahead" figure here would be borrowed from somewhere else rather than measured. What we can measure is which month is cheap: across 10 months of cached fares, Sep comes out lowest on this route. See /guides/what-moves-a-flight-price/ for what does move a fare.
Are there nonstop flights from Bangkok to Seoul?
Yes — the current board includes nonstop fares (T'way Air). The outbound leg runs around 5.5 hours.
Are these prices guaranteed?
No — these are cached fares found on real searches (this one on September 1). Airlines reprice constantly, so the booking search re-checks the live price before you pay. Fresher finds are far more likely to still be available.
Next step
Sleeping in Seoul?
Lock the flight first — then compare stays for Sep 20 – Sep 27 · 7 nights.
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Missed it?
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