Route brief · SEL → BKK
Seoul → Bangkok
$160
−43% vs typical
seasonal median $280 · difference $120
Sep 15 – Sep 18 · 3 nights
T'way AirNonstop
- Usual monthly lows
- $244–$319
- Board rank
- Stronger than 92%
- Route sample
- 8 observed months
Cached fare — the booking search re-prices live before you pay.
Destination briefBKKBangkokThe backpacker cliché that still delivers: gold temples, boat noodles, $12 street-food feasts.Best windowNov–FebAirportsSuvarnabhumi (BKK) · Don Mueang (DMK)All routes into BangkokWhen this route gets cheap.
Cached-fare history: across 8 months, Sep is the cheapest for SEL → BKK. Best time to be there: Nov–Feb.
Fares bottom out in September around $160 and peak in April near $383 — a $223 spread across the 8 months we track. The cheapest itinerary we are tracking flies T'way Air nonstop and takes about 6 hours outbound, on a 3-night trip. At $160 for 3,722 km each way, that works out to about $21 per 1,000 km flown. That is well under the $39 that medium-haul fares on this board typically run. Of the 4 departure cities we track at a similar distance from Bangkok, this is the cheapest right now — 16% under the next one, Shanghai.
Cheapest day in the next 3 months: Sep 10 · $194 (24% below median)
Tap any day → live search
The median cached fare across this calendar is 3% lower than when tracking began on Aug 8 — $254 then versus $246 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 $187, on Sep 28.
September 2026
Cheapest in Sep · around $160
43% below the $280 typical fare
Cheapest round-trip fare found per month · Seoul → Bangkok · cached-price history
Route facts
- Airports
- Incheon (ICN) · Gimpo (GMP) ↔ Suvarnabhumi (BKK) · Don Mueang (DMK)
- Flight time
- ~6 hours outbound
- Distance
- ~3,722 km each way
- Typical price
- $280 round-trip (seasonal median)
- Airlines on the board
- T'way Air
- Itineraries
- Nonstop available
- Best months to visit
- Nov–Feb
SEL → BKK, answered.
Is $160 a good price for Seoul to Bangkok?
Yes — the seasonal median for this route is around $280 round-trip. At $160 you're 43% below that, saving about $120, which we rate rare for this route.
What is the cheapest month to fly from Seoul to Bangkok?
Across 8 months of cached-fare history, Sep comes out cheapest on this route. The best months to actually be in Bangkok are Nov–Feb — when those overlap, that's your window.
How far in advance should I book SEL → Bangkok?
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 8 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 Seoul to Bangkok?
Yes — the current board includes nonstop fares (T'way Air). The outbound leg runs around 6 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 Bangkok?
Lock the flight first — then compare stays for Sep 15 – Sep 18 · 3 nights.
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Missed it?
Cached fares expire. This route has a feed of its own — follow it and the next SEL → BKK drop reaches you as soon as we find it.
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