Timatic is your friend
http://www.delta.com/planning_reserv...tion/index.jsp
This is for outbound:
National Thailand (TH) /Transit Canada (CA)
Destination Chile (CL)
ALSO CHECK DESTINATION INFORMATION BELOW
Canada (CA)
TWOV (Transit Without Visa):
- ONLY IF ALL CONDITIONS BELOW ARE MET-
Visa required, except for Nationals of Thailand holding
confirmed onward tickets transiting For details, click here on the same
calendar day, (SEE NOTE 43594) (SEE NOTE 43595) provided:
- travelling to/from the USA; and
- holding a valid US visa. (SEE NOTE 39687)
NOTE 43594: Facility available if transiting through
Pearson International Airport (YYZ) AND arriving on
aircraft operated by Air Canada or Jazz Air (insertion of
SSR TWOV in PNR is required). Note: codeshare flight
numbers of these carriers operated by another carrier are
not included.
{reference to YVR deleted}
The YYZ ITPCF, which handles international passengers
travelling to USA, is open from 04:30-21:00 hours; the YYZ
facility that processes passengers arriving from USA and
continuing internationally, is open 24 hours.
Additional Information:
- Visitors are required to hold proof of sufficient funds to
cover their stay and documents required for their next
destination.
Warning:
- Visitors not holding return/onward ticket could be refused
entry.