Route brief · BOS → BKK
Boston → Bangkok
$888
round-trip · too little price history on this route to compare
Sep 27 – Oct 27 · 30 nights
Hainan Airlines1 stop
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.
Best time to be in Bangkok: Nov–Feb. Fare history for this route is still thin, so we make no seasonal call yet.
The cheapest itinerary we are tracking makes one stop and takes about 21.5 hours outbound, on a 30-night trip — ticketed under Hainan Airlines, which on a connecting fare need not operate every leg. At $888 for 13,716 km each way, that works out to about $32 per 1,000 km flown. That is below the $40 typical of ultra-long-haul fares here. Across the 13 departure cities we track at a similar distance from Bangkok, this fare ranks 10th — 2.3× the $386 we hold from Los Angeles. That puts it in the cheaper half of the 29 routes of similar length we watch out of Boston, where the middle fare is $1,055. We have 3 months of cached prices for this route so far — not enough to call a fare cheap or expensive, so we publish the price without a percentage.
The 6 days we hold a cached fare for
Tap a date → live search
The median cached fare across this calendar is 1% higher than when tracking began on Aug 8 — $918 then versus $928 now, across 4 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 $827, on Sep 27.
These are the only days we have a cached price for on this route so far — not the only days it flies. The search above covers any date.
Route facts
- Airports
- Logan (BOS) ↔ Suvarnabhumi (BKK) · Don Mueang (DMK)
- Flight time
- ~21.5 hours outbound
- Distance
- ~13,716 km each way
- Airlines on the board
- Hainan Airlines
- Itineraries
- Connections on current fares
- Best months to visit
- Nov–Feb
BOS → BKK, answered.
How far in advance should I book BOS → 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We do not publish a number for this, because we cannot measure it yet.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. See /guides/what-moves-a-flight-price/ for the levers we can measure.
Are there nonstop flights from Boston to Bangkok?
The current cheapest fares involve a connection, ticketed under Hainan Airlines. Nonstop options exist on many dates at higher prices — check the live search for your exact dates.
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 27 – Oct 27 · 30 nights.
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Missed it?
Cached fares expire. This route has a feed of its own — follow it and the next BOS → BKK drop reaches you as soon as we find it.
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