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 → RIO
Boston to Rio de Janeiro
Best fare, round trip
$587
−12%
below its usual $670
you keep $83
Found
- Depart
- Mon 30 Nov
- Return
- Sun 6 Dec
- Stay
- 6 nights
- Flight
- 1 stop · 12h
- Airline
American
Most of this route’s monthly lows fall between $587 and $678. The drop beats 29% of measured fares on the board, over 5 observed months.
Cached fare — the booking search re-prices live before you pay.
BrazilRio de JaneiroBeaches with mountains growing out of them. Fares south swing hard — we catch the dips.Best windowApr–Jun · Sep–OctAirportsGaleão (GIG) · Santos Dumont (SDU)Every route into Rio de JaneiroFare seasonality
When this route gets cheap.
Fares bottom out in November around $587 and peak in March near $678, 16% dearer, across the 5 months we track. The cheapest itinerary we are tracking makes one stop and takes about 12 hours outbound, on a 6-night trip — ticketed under American, which on a connecting fare need not operate every leg. At $587 for 7,802 km each way, that works out to about $38 per 1,000 km flown. That is below the $44 per 1,000 km typical of long-haul fares here. Across the 23 departure cities we track at a similar distance from Rio de Janeiro, this fare ranks 3rd — 21% above the $487 from New York. That puts it in the cheaper half of the 21 routes of similar length we watch out of Boston, where the middle fare is $728. The best time to be in Rio de Janeiro: Apr–Jun · Sep–Oct.
The 5 days we hold a cached fare for
Press a date to compare its fares
The median cached fare across this calendar is 42% higher than when tracking began on 8 Aug — $603 then versus $858 now, across 15 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 $439, on 27 Nov.
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
Cheapest in Nov, around $587
12% below the $670 typical fare
$660Oct, around the usual price. Compare October fares.$587Nov, the cheapest month. Compare November fares.$587Dec, below the usual price. Compare December fares.$678Mar ’27, around the usual price. Compare March fares.$668Aug, around the usual price. Compare August fares.
CheapestBelow usualUsualAbove usualPress a month to compare its fares
Cheapest round-trip fare found each month, Boston to Rio de Janeiro, from cached prices.
Route facts
- Airports
- Logan (BOS) ↔ Galeão (GIG) · Santos Dumont (SDU)
- Flight time
- ≈12 hours outbound
- Distance
- ≈7,802 km each way
- Typical price
- $670 round-trip (seasonal median)
- Airlines on the board
- American
- Itineraries
- Connections on current fares
- Best months to visit
- Apr–Jun · Sep–Oct
Good to know
BOS → RIO, answered.
Is $587 a good price for Boston to Rio de Janeiro?
Only slightly. The seasonal median is around $670 round-trip and this fare is 12% under it. We do not call a drop notable until 20%, so this is an ordinary price for the route rather than a reason to hurry.
What is the cheapest month to fly from Boston to Rio de Janeiro?
Across 5 months of cached-fare history, Nov comes out cheapest on this route. The best months to actually be in Rio de Janeiro are Apr–Jun · Sep–Oct — when those overlap, that's your window.
How far in advance should I book BOS → Rio de Janeiro?
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 5 months of cached fares, Nov comes out lowest on this route. Our guide Why flight prices change covers what does move a fare.
Are there nonstop flights from Boston to Rio de Janeiro?
The current cheapest fares involve a connection, ticketed under American. 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 Rio de Janeiro?
Lock the flight first — then compare stays for 30 Nov – 6 Dec · 6 nights.
Browse hotelsMissed it?
Cached fares expire. This route has a feed of its own — follow it and the next BOS → RIO 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%
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$673
usually $975
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Most monthly lows $810–$1,133. Cheaper than every other month on record (5).
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