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 → CMB
Boston to Colombo
Best fare, round trip
$936
Too little price history on this route to compare — the fare is shown as found.
Found
- Depart
- Tue 1 Dec
- Return
- Tue 15 Dec
- Stay
- 14 nights
- Flight
- 1 stop · 17h
- Airline
Etihad
Cached fare — the booking search re-prices live before you pay.
Sri LankaColomboA working port city that most people leave immediately — for tea country, ruins and the south coast.Best windowDec–MarAirportsBandaranaike (CMB)Every route into ColomboFare seasonality
When this route gets cheap.
The cheapest itinerary we are tracking makes one stop and takes about 17 hours outbound, on a 14-night trip — ticketed under Etihad, which on a connecting fare need not operate every leg. At $936 for 13,792 km each way, that works out to about $34 per 1,000 km flown. That is below the $42 per 1,000 km typical of ultra-long-haul fares here. Across the 9 departure cities we track at a similar distance from Colombo, this fare ranks 3rd — 21% above the $774 from Toronto. That puts it in the cheaper half of the 29 routes of similar length we watch out of Boston, where the middle fare is $1,146. 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 Colombo: Dec–Mar.
The one day we hold a cached fare for
Press a date to compare its fares
The median cached fare across this calendar is 43% lower than when tracking began on 5 Sep — $1,632 then versus $936 now, across 14 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 $936, on 1 Dec.
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 17 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) ↔ Bandaranaike (CMB)
- Flight time
- ≈17 hours outbound
- Distance
- ≈13,792 km each way
- Airlines on the board
- Etihad
- Itineraries
- Connections on current fares
- Best months to visit
- Dec–Mar
Good to know
BOS → CMB, answered.
How far in advance should I book BOS → Colombo?
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 Colombo?
The current cheapest fares involve a connection, ticketed under Etihad. 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 Colombo?
Lock the flight first — then compare stays for 1–15 Dec · 14 nights.
Browse hotelsMissed it?
Cached fares expire. This route has a feed of its own — follow it and the next BOS → CMB drop reaches you as soon as we find it.
Follow this route’s feedKeep browsing
Related routes on the board.
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$910
usually $1,730
−47%
Most monthly lows $1,262–$1,730. Cheaper than every other month on record (3).
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$518
usually $825
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$774
usually $1,085
−29%
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$583
usually $720
−19%
Most monthly lows $663–$720. Cheaper than every other month on record (3).