Route brief · BOS → KIX
Boston → Osaka
$1,424
round-trip · too little price history on this route to compare
Oct 21 – Oct 31 · 10 nights
JetBlue2 stops
Cached fare — the booking search re-prices live before you pay.
Destination briefKIXOsakaJapan with the volume up — street food, blunt humour, and Kyoto and Nara both under an hour by train.Best windowMar–May · Oct–NovAirportsKansai (KIX) · Itami (ITM)All routes into OsakaWhen this route gets cheap.
Best time to be in Osaka: Mar–May · Oct–Nov. Fare history for this route is still thin, so we make no seasonal call yet.
The cheapest itinerary we are tracking makes 2 stops and takes about 25 hours outbound, on a 10-night trip — ticketed under JetBlue, which on a connecting fare need not operate every leg. At $1,424 for 11,066 km each way, that works out to about $64 per 1,000 km flown. That is above the $40 typical of ultra-long-haul fares here. Across the 30 departure cities we track at a similar distance from Osaka, this fare ranks 30th — 2.9× the $498 we hold from San Francisco. For context, the middle fare among the 24 routes of similar length we watch out of Boston is $984. 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.
The one day we hold a cached fare for
Tap a date → live search
The median cached fare across this calendar is 13% higher than when tracking began on Aug 8 — $1,146 then versus $1,300 now, across 4 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 $1,003, on Oct 21.
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.
Route facts
- Airports
- Logan (BOS) ↔ Kansai (KIX) · Itami (ITM)
- Flight time
- ~25 hours outbound
- Distance
- ~11,066 km each way
- Airlines on the board
- JetBlue
- Itineraries
- Connections on current fares
- Best months to visit
- Mar–May · Oct–Nov
BOS → KIX, answered.
How far in advance should I book BOS → Osaka?
We do not publish a number for this, because we cannot measure it yet.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. See /guides/what-moves-a-flight-price/ for the levers we can measure.
Are there nonstop flights from Boston to Osaka?
The current cheapest fares involve a connection, ticketed under JetBlue. Nonstop options exist on many dates at higher prices — check the live search for your exact dates.
Are these prices guaranteed?
No — these are cached fares found on real searches (this one on September 1). 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 Osaka?
Lock the flight first — then compare stays for Oct 21 – Oct 31 · 10 nights.
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Missed it?
Cached fares expire. This route has a feed of its own — follow it and the next BOS → KIX drop reaches you as soon as we find it.
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