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 → FRA
Boston to Frankfurt
Best fare, round trip
$717
Too little price history on this route to compare — the fare is shown as found.
Found
- Depart
- Mon 15 Mar
- Return
- Mon 22 Mar
- Stay
- 7 nights
- Flight
- 1 stop · 10h
- Airline
TAP Air Portugal
Cached fare — the booking search re-prices live before you pay.
GermanyFrankfurtBanking towers and a river beach — mostly a place people change planes, which is exactly why fares through it are cheap.Best windowMay–SepAirportsFrankfurt (FRA) · Hahn (HHN)Every route into FrankfurtFare seasonality
When this route gets cheap.
The cheapest itinerary we are tracking makes one stop and takes about 10 hours outbound, on a 7-night trip — ticketed under TAP Air Portugal, which on a connecting fare need not operate every leg. At $717 for 5,893 km each way, that works out to about $61 per 1,000 km flown. That is above the $43 per 1,000 km typical of medium-haul fares here. Across the 8 departure cities we track at a similar distance from Frankfurt, this fare ranks 6th — 2.4× the $305 we hold from Dubai. For context, the middle fare among the 23 routes of similar length we watch out of Boston is $664. We have 2 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. Fare history here is still too short to name a cheap season. The best time to be in Frankfurt: May–Sep.
We are still collecting this route's months — 2 months of cached prices so far, too few to chart.
Route facts
- Airports
- Logan (BOS) ↔ Frankfurt (FRA) · Hahn (HHN)
- Flight time
- ≈10 hours outbound
- Distance
- ≈5,893 km each way
- Airlines on the board
- TAP Air Portugal
- Itineraries
- Connections on current fares
- Best months to visit
- May–Sep
Good to know
BOS → FRA, answered.
How far in advance should I book BOS → Frankfurt?
We do not publish a number for this, because we cannot measure it yet.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 Frankfurt?
The current cheapest fares involve a connection, ticketed under TAP Air Portugal. 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 6 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 Frankfurt?
Lock the flight first — then compare stays for 15–22 Mar '27 · 7 nights.
Browse hotelsMissed it?
Cached fares expire. This route has a feed of its own — follow it and the next BOS → FRA drop reaches you as soon as we find it.
Follow this route’s feedKeep browsing
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