Public Transportation from La Guardia Airport: If you need a ride, follow the signs to the Welcome Center/Ground Transportation Counter near the baggage claim area, or call 1-800-AIR-RIDE for information on authorized transportation services. 
(a) The Welcome Center on the Arrivals level of the Central Terminal at LaGuardia Airport offers transportation information  - all  transportation arrangements can be made there, including shared rides, private car and limousine service. The Center also provides information on public transit options that require no more than one connection. 
(b) The Terminals have ground transportation counters on their Arrivals level for information on New York & New Jersey travel.
(c) Bus stops: M60 and Q48 serves all terminals; Q33 serves TC & TD; Q72 serves Central Terminal B, and Q7 serves TA. 
(d) Some buses link the Airport to the subway system and the Long Island Rail Road, with free transfers to metrocard users making subway connections. Buses are wheelchair accessible and are operated by the MTA Transit system:

Public bus 'NYC Airporter' (718-777-5111)
 - you can purchase tickets online at NYCAirporter.com.  
(a) to Manhattan: It leaves every 30 mins for Grand Central and Penn stations. Also, Bus M60 serves 106th Street & Broadway, with connections to the Q33 & Q47 buses,  and subway lines E, F, G, R, V & 7.
(b) to Queens: Buses M60, Q33,  Q47, Q48 & Q72.
(c) to Bronx: Buses M60 to 125th Street for bus & subway connections.
(d) to Brooklyn: Buses Q33 or Q47 connect in Queens to the F, G & R subway trains.
(a) SuperShuttle Manhattan shared ride at 800-258-3826; 
(b) the Airlink shared door-to-door service at 877-599-8200 or  718-560-3900.

For connections to the E, F, M, R &7 subway trains use the  Roosevelt Avenue/74th Street station. For more information, visit the MTA website at http:// web.mta.info/nyct/sbs/M60LaGuardiaAirportHarlem/index.html
For service to Astoria in Queens, use the M60 bus and transfer to the N or Q subway trains at Hoyt Avenue/31st Street.

1. To Kennedy Airport JFK, you have the options of taking a metered taxi or limo, both take about 30 mins; or call the folowing three services, all of which take 45-60 mins: ETS Air Shuttle 718-221-5341; All County Express 914-381-4223 or 516-285-1300; NYC Airporter 718-777-5111.
2. To Newark Libery Airport EWR, you can either take a metered taxi or limo, taking 60-90 minutes,  or take the All County Express 800-914-4223 or the  ETS Air Shuttle 718-221-5341, both of which take 75-105 mins.   Both metered taxi and private limo & van service (available at Ground Transport Information Counter in baggage Claim area of the terminals) take 60-90 mins.

Buses To City

Service Area: Bus Terminal, Grand Central Station and Penn Station
Fare Information: $12.75
Contact Information: (718) 777-5111
Service Area: between LaGuardia and Manhattan and Queens with connections to New York City subways for destinations beyond

Google Plus One