I-678 has a short spur that functions as an extension of the Whitestone Expressway through the complex interchange between I-678 and the Grand Central Parkway near LaGuardia Airport. The road is not officially considered a freeway and does not even have a reference route number. This road was constructed as part of plans to build the Astoria Expressway, which would have connected to I-278.
| Mile | Northbound | Southbound | Notes |
|---|---|---|---|
| Queens County Borough of Queens |
|||
| Speed Limit 30 | |||
| 0.0 | To  To  |
Exit 13A Astoria Boulevard West LaGuardia Airport All Trucks - Buses |
111th Street Ditmars Boulevard At-grade intersection |
| 0.2 | Astoria Boulevard East | ||
| Speed Limit 50 | Speed Limit 30 | ||
| 0.4 | Grand Central Parkway East Eastern Long Island Passenger Cars Only |
Exits 13B-C Grand Central Parkway LaGuardia Airport Eastern Long Island Passenger Cars Only |
|
| 0.8 |  EastNorthern Boulevard Citi Field |
Exit 13D West Northern Boulevard Citi Field |
|
| 1.2 | South Van Wyck Expressway Kennedy Airport |
||
| 1.2 | Exit 14 Linden Place |
||
| 1.2 | North Whitestone Bridge |
To To |
|
| Speed Limit 50 | |||
| Queens County Borough of Queens |
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