回複：8老師，再問遍旅遊簽證過期，朋友去加拿大旅遊後，

30天內您說可以再回美國。 請問我查到有人說隻能走陸路， 不能飛機回美， 是這樣嗎？

-No such limitation. But some airlines may not understand this rule and thus, may not allow you to board the plane. So, you may print out the USCIS or CBP docuements about this rule.

See these websites:

http://www.trackitt.com/canada-discussion-forums/landing-in-canada/679067371/automatic-revalidation-to-enter-us

https://help.cbp.gov/app/answers/detail/a_id/1218/~/automatic-revalidation-for-certain-temporary-visitors

http://www.cbp.gov/linkhandler/cgov/travel/inspections_carriers_facilities/clp/bulletins/auto_reva.ctt/auto_reva.pdf

 

出境的時候也不能交回I-94 （半年有效）卡，對嗎？

-Correct. Show this I-94 to the CPB officer when you return to US from Canada.