飛行機に現金・紙幣を持ち込める？（米国TSA・CATSA規則）

持込可：航空保安基準において機内持ち込み手荷物として問題なく持ち込めます。

受託手荷物：受託手荷物（預け入れ）として問題なく預けることができます。

Standard carry-on baggage size allowances apply; TSA publishes no individual numerical cap for personal use.

Domestic travelers have no legal requirement to declare cash in any amount. However, travelers entering or departing the United States carrying currency or monetary instruments exceeding $10,000 must file FinCEN Form 105 with U.S. Customs and Border Protection. Failure to declare can result in immediate seizure and severe civil penalties.

Domestically in the US or Canada: unlimited. Internationally: as much as you like, but you must declare $10,000+ (CA$10,000+ out of Canada) on arrival/departure to customs.

Yes, with no legal limit in the US or Canada. TSA may ask about very large amounts, and they can refer matters to law enforcement — carry documentation of the source if it is a big sum.

Under Reserve Bank of India (RBI) and Income Tax rules, there is no official statutory limit on carrying cash on domestic flights within India. However, carrying more than ₹50,000 in cash during election periods or unexplained cash exceeding ₹2,00,000 can lead to detention by CISF and referral to the Income Tax Department if you lack supporting bank withdrawal documentation.