Exceptional1 stop · 17.5h
BOS to BKKThailand
Bangkok
$506
usually $1,140
−56%
Most monthly lows $915–$1,187. Cheaper than every other month on record (5).
- Travel dates
- 7 Mar '27 – 17 Apr '27 · 41 nights
- Airline
Turkish Airlines· $18 per 1,000 km
Flights · BOS → KUL
Boston to Kuala Lumpur
Best fare, round trip
$920
Too little price history on this route to compare — the fare is shown as found.
Found
- Depart
- Mon 2 Nov
- Return
- Thu 12 Nov
- Stay
- 10 nights
- Flight
- 1 stop · 18.5h
- Airline
- Turkish Airlines
Cached fare — the booking search re-prices live before you pay.
MalaysiaKuala LumpurAirAsia’s home base, which is why fares onward to anywhere in Asia collapse the moment you land.Best windowMay–JulAirportsKuala Lumpur (KUL) · Subang (SZB)Every route into Kuala LumpurFare seasonality
When this route gets cheap.
The cheapest itinerary we are tracking makes one stop and takes about 18.5 hours outbound, on a 10-night trip — ticketed under Turkish Airlines, which on a connecting fare need not operate every leg. At $920 for 14,904 km each way, that works out to about $31 per 1,000 km flown. That is below the $42 per 1,000 km typical of ultra-long-haul fares here. Across the 13 departure cities we track at a similar distance from Kuala Lumpur, this fare ranks 6th — 33% above the $694 from Los Angeles. It is also the 2nd cheapest of the 22 routes of similar length we watch out of Boston. We have 1 month 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. Fare history here is still too short to name a cheap season. The best time to be in Kuala Lumpur: May–Jul.
The 2 days we hold a cached fare for
Press a date to compare its fares
The median cached fare across this calendar is 91% higher than when tracking began on 8 Aug — $638 then versus $1,220 now, across 3 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 $638, on 17 Aug.
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.
Cached fares · checked 13 Oct 2026
We are still collecting this route's months — 1 month of cached prices so far, too few to chart.
Route facts
- Airports
- Logan (BOS) ↔ Kuala Lumpur (KUL) · Subang (SZB)
- Flight time
- ≈18.5 hours outbound
- Distance
- ≈14,904 km each way
- Airlines on the board
- Turkish Airlines
- Itineraries
- Connections on current fares
- Best months to visit
- May–Jul
Good to know
BOS → KUL, answered.
How far in advance should I book BOS → Kuala Lumpur?
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. Our guide Why flight prices change covers the levers we can measure.
Are there nonstop flights from Boston to Kuala Lumpur?
The current cheapest fares involve a connection, ticketed under Turkish Airlines. We hold no nonstop fare on this route right now, which does not mean none flies — search your exact dates to see what does.
Are these prices guaranteed?
No — these are cached fares found on real searches (this one on 17 October). 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 Kuala Lumpur?
Lock the flight first — then compare stays for 2–12 Nov · 10 nights.
Browse hotelsMissed it?
Cached fares expire. This route has a feed of its own — follow it and the next BOS → KUL drop reaches you as soon as we find it.
Follow this route’s feedKeep browsing
Related routes on the board.
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BOS to TYOJapan
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$910
usually $1,730
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Most monthly lows $1,262–$1,730. Cheaper than every other month on record (3).
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$518
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DEL to KULIndia
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$266
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Most monthly lows $302–$446. Cheaper than every other month on record (5).
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CAN to KULChina
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$158
usually $225
−30%
Most monthly lows $183–$250. Cheaper than every other month on record (7).
Good1 stop · 16.5h
STO to KULSweden
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$486
usually $675
−28%
Most monthly lows $660–$677. Cheaper than every other month on record (3).
