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 → OPO
Boston to Porto
Fare on the board
None right now.
The last cached fare expired on 13 October 2026. We show no price until a new one turns up.
No current fare1 month of price history
- Last fare expired
- 13 Oct 2026
- Price history
- 1 month
- Flight time
- About 6.5h
We still track this route; our crawl simply has not found a fare on it since. That says nothing about whether it is expensive today, and we will not invent a price to fill the gap. This page fills back in the moment a fare returns.
Your own dates can still be searched, just below.
PortugalPortoGranite, port wine and a river gorge through the middle — cheaper and steeper than Lisbon.Best windowMay–Jun · Sep–OctAirportsFrancisco Sá Carneiro (OPO)Every route into PortoWhat we did measure
The price history we hold.
We hold one month ahead with a cached fare: October, from $988. That is a single data point, not a season, so there is no chart to draw yet.
On the board
Routes with observed fares.
Rare1 stop · 17h
BOS to TYOJapan
Tokyo
$910
usually $1,730
−47%
Most monthly lows $1,262–$1,730. Cheaper than every other month on record (3).
GreatNonstop · 8.5h
BOS to ISTTürkiye
Istanbul
$518
usually $800
−35%
Most monthly lows $760–$892. Cheaper than every other month on record (8).
ExceptionalNonstop · 3h
FRA to OPOGermany
Frankfurt
$74
usually $255
−71%
Most monthly lows $99–$259. Cheaper than every other month on record (5).
ExceptionalNonstop · 2.5h
LON to OPOUnited Kingdom
London
$60
usually $160
−63%
Most monthly lows $118–$181. Cheaper than every other month on record (8).
ExceptionalNonstop · 3h
ROM to OPOItaly
Rome
$59
usually $140
−58%
Most monthly lows $89–$152. Cheaper than every other month on record (7).
