GA from Long Island to Toronto City

[Vansin]

I am planning a flight from Republic Airport-KFRG to Toronto Island -CYTZ and am looking for info regarding the least hassle route and where best to clear customs and immigration.
Is Niagra KIAG an option, any info much appreciated. Thanks.

[IHL]

Are you referring to clearing customs upon returning to the U.S. or upon entering Canada?

CYTZ is an airport of entry (AOE) for customs purposes. If you planning on flying there VFR make sure you have a current Canada Flight Supplement and VTA chart. The airspace around CYTZ is very busy but the airport itself is quite a pleasant place to fly into.

Scaned from the CFS Custom procedures:

Canada
CUSTOMS (CUST)
CUSTOMS DESIGNATORS
AOE refers to Airports of Entry, and designates all aerodromes where customs services are available.
Aerodromes with capacity limitations are indicated by a number preceded by a "/", e.g., AOE/44.
Where an aerodrome is indicated to be limited to a capacity of 15 it refers to an authorized customs
Airport of entry and exit for general aviation air traffic only, e.g., privately operated or small charter
aircraft carrying no more than 15 passengers and their baggage.
CUSTOMS PROCEDURES
(a) Pilots must land at a Canada Customs authorized Airport of Entry (AOE) and a flight plan must
be filed for all transborder flights (CAR 602.73). Canada Customs does not require citizenship
information on flight plans.
CUST AOE/24 888-226-7277 excess of 15 pax PNR 14-21Z Mon-Fri
GENERAL A48
CUSTOMS PROCEDURES (Cont\'d)
(b) Aerodromes which are designated as an AOE with Customs services available are indicated in the Aerodrome/Facility Directory. "ADCUS" notifications on flight plans will no longer be accepted, and pilots must make their own customs arrangements by calling 888-226-7277 at least 2 hours but not more than 48 hours before flying into Canada. See AIP Canada, FAL 2.3.3.

Pilots are also cautioned that for flight arrivals outside of the established hours, the provision of Customs service may not always be available and, if service is made available, call-out charges may be levied.
(c) CANPASS - Private Aircraft/Corporate Air Program: Travellers on a Canadian or U.S. registered private, company-owned, or small charter aircraft carrying no more than 15 passengers, arriving directly from the United States, must use a telephone reporting system to receive permission from a customs or immigration officer to enter Canada. At least 2 hours but not more than 48 hours before flying into Canada they must call 1-888-CANPASS (equates to 1-888-226-7277). See AIP Canada, FAL 2.3.3.
Pilots are reminded that advising CANPASS of arrival time in Canada does not fulfill their flight planning requirements and that a flight plan must be filed for all transborder flights.
(d) For those flights commencing outside the geographical areas covered under the 1-888- CANPASS number, the following numbers are available:
Lansdowne, ON Tel: [phone] Fax: [phone]
Hamilton, ON Tel: [phone] Fax: [phone]
Windsor, ON Tel: [phone] Fax: [phone]
Victoria, BC Tel: [phone] Fax: [phone]
It is recommended that you select the number geographically closest to your point of arrival.
NOTE: Flights destined west of the Manitoba/Ontario border are required to use the Victoria telephone number.
(e) Where, due to weather conditions or other emergency, the aircraft lands at a place which is not designated as a place for customs report, the pilot shall call 1-888-CANPASS or the nearest office of the Royal Canadian Mounted Police as soon as possible.