|Maintained by Louisiana DOTD|
|Length:||115.3 mi (185.6 km)|
1927 (first section opened);
1953 (last section opened) – present
|South/East end:||US 61 / I-10 in New Orleans|
| I-310 in St. Rose
US 51 in LaPlace
I-10 near Sorrento
I-12 / US 190 / I-110 / US 61 in Baton Rouge
|North/West end:||US 190 near Krotz Springs|
Airline Highway is a divided highway in the U.S. state of Louisiana, built in stages between 1925 and 1953 to bypass the older Jefferson Highway. It carries U.S. Highway 61 from New Orleans northwest to Baton Rouge, and U.S. Highway 190 from Baton Rouge west over the Mississippi River on the Huey P. Long Bridge. US 190 continues west towards Opelousas on an extension built at roughly the same time.
The highway was named because it runs relatively straight on a new alignment, rather than alongside the winding Mississippi River. The name became quite fitting, as both Louis Armstrong New Orleans International Airport and Baton Rouge Metropolitan Airport are along the highway. Airline Highway also runs close to the site of the old Baton Rouge airfield (near the intersection of Airline and Florida Blvd., now a park and government office complex), which brings it within blocks of the similarly named Airport Ave and Airway Drive.
The highway's origin is famously identified with Governor Huey P. Long, who advocated for a modern highway system in Louisiana. Though the project was underway when Long took office, most of its initial construction was completed during his administration. Originally, Airline Highway was a two-lane road that ran from Prairieville to Shrewsbury. The first section, running between Williams Boulevard in Kenner and Shrewsbury Road, opened in June 1927. It was begun by the Jefferson Parish Police Jury as a local road and incorporated into the plan for Airline Highway during construction. The remainder of the highway was built between 1928 and 1933 by the Louisiana Highway Commission with federal aid, as the road would carry US 61 upon completion.
The section north of the spillway was officially opened on July 4, 1933, and the section on the south side followed three weeks later. (Various sections had been temporarily opened to traffic beginning in October 1931.) Completion of the bridge over the Bonnet Carré Spillway was delayed until 1935, necessitating a detour over the Jefferson Highway (River Road) via temporary gravel roads along the spillway guide levees. The spillway bridge was opened to traffic on September 28, 1935 and dedicated on December 13.
At this time, traffic was routed from Prairieville into Baton Rouge over the Jefferson Highway (today's LA 73). On the New Orleans end, travelers had the option to continue on Airline Highway and follow Metairie Road (the original route of Jefferson Highway) into town or transfer to the Jefferson Highway (today's LA 48) at Kenner and follow the direct connection onto South Claiborne Avenue completed in 1928.
The first improvements to the Airline Highway began in 1935 and consisted of widening and re-surfacing the Kenner-Shrewsbury link built a decade earlier. The new four-lane section from Williams Boulevard to Haring Road opened in October 1937. The new four- and six-lane section from Haring Road to Labarre Road opened in December 1938. The latter project included a slight re-alignment and extension on the Shrewsbury end. (Present-day Robertson Street is a remnant of the old alignment.) The eight-lane extension into Tulane Avenue (reached by a now-demolished six-lane bridge over the former New Basin Canal) was officially opened on August 26, 1940.
Also in 1940, the Old Mississippi River Bridge opened in Baton Rouge. With this occurrence, a 7.9 mile bypass was built around the city that went to the Nesser Overpass, opening to traffic in July 1941--this bypass was part of Airline Highway, but it was not connected to the rest of the highway until 1953. A further extension continued west to the Atchafalaya Bridge at Krotz Springs. The remainder of the highway was multilaned in sections during the 1940s and the 1950s. For a short time in that decade, it was the longest toll-free four-lane highway in the nation, as the multilaned portion ran 124 miles from the Atchafalaya River to New Orleans. The spillway bridge carried four very narrow lanes of traffic (often resulting in accidents) until 1984 when a parallel bridge was constructed.
The majority of the New Orleans-Baton Rouge section was built parallel to the Louisiana Railway and Navigation Company, which was itself built later than the slightly longer Yazoo and Mississippi Valley Railroad. The former Louisiana Railway, now part of the Kansas City Southern Railway, crosses the Huey Long Bridge with the highway and splits to the northwest towards Shreveport; the extension to Opelousas parallels the New Orleans, Texas and Mexico Railway (later part of the Missouri Pacific Railroad).
Originally US Highways 65 and 51 were cosigned to Airline (65 the entire length, and 51 from LaPlace to New Orleans). In 1951, Louisiana truncated the route lengths, and the highway, with the exception of a portion in north Baton Rouge, is signed as US 61.
In an effort to clean up the highway's notorious history due to the seedy hotels and motels that once lined it, the portion in Jefferson Parish has been renamed Airline Drive.
Baton Rouge Bypass 
The portion of the Airline Highway north and east of downtown Baton Rouge carries U.S. Highway 61 and U.S. Highway 190 around downtown, and includes several interchanges. The bypass was designated U.S. Highway 61/190 Bypass from 1957 to 1963, after which US 61 and US 190 were moved onto it, and their old routes through downtown became U.S. Highway 61/190 Business. The bypass and business routes originally intersected in a traffic circle, which was replaced in 1963 by a cloverleaf interchange.
In the original 1955 plan for urban Interstate Highways, numbered by 1959, the Baton Rouge bypass was designated Interstate 410; it would have connected to Interstate 10 on both ends (as I-10 would have used the US 190 corridor immediately west of Baton Rouge, still crossing the Atchafalaya Swamp in its present location). The route was cancelled by the end of the 1960s (and the number was later reused for another Interstate 410).
Junction List 
|Orleans||New Orleans||0.0||South Carrollton Avenue||Southern/eastern terminus of Airline Highway;
South end of U.S. 61 overlap
I-10 east (Pontchartrain Expressway) to US 90 Bus. – Westbank
I-10 west – N.O. Int'l Airport, Baton Rouge
|Jefferson||Metairie||3.0||North Causeway Boulevard to Lake Pontchartrain Causeway
LA 3046 south (Causeway Boulevard) to US 90
Northern terminus of LA 3046
|3.3||LA 611-9 (Severn Avenue)||Western terminus of LA 611-9|
|3.8||LA 3139 south (Earhart Expressway) at Cleary Avenue|
|4.3|| LA 3152 north (Clearview Parkway)
LA 3152 south (South Clearview Parkway) to LA 3139 (Earhart Expressway)
|6.3||LA 3154 (Hickory Avenue)||Northern terminus of LA 3154|
|6.4||LA 3155 (Little Farms Avenue)||Northern terminus of LA 3155|
|Kenner||8.3||LA 49 north (Williams Boulevard) to I-10||Southern terminus of LA 49|
|9.3||Louis Armstrong New Orleans International Airport|
|St. Charles||St. Rose||12.2||LA 50 (Almedia Road)||Northern terminus of LA 50|
|13.0||I-310 – Boutte, Baton Rouge||Interchange|
|Destrhan||13.9||LA 626 (St. Rose Avenue)||Northern terminus of LA 626|
|Norco||17.8||LA 627 (Prospect Avenue)||Northern terminus of LA 627|
|19.0||LA 48 (Apple Street)||Western terminus of LA 48|
|Montz||21.2||LA 628 (CC Road)||Eastern terminus of LA 628|
|St. John the Baptist||LaPlace||22.1||LA 3217||Eastern terminus of LA 3217|
|23.2||LA 636-1 (McReine Road)||Eastern terminus of LA 636-1|
|24.6||LA 44 (Main Street)||Eastern terminus of LA 44|
|24.7||US 51 north to I-10 to I-55||Southern terminus of U.S. 51|
|25.7||LA 3224 (Hemlock Street)||Northern terminus of LA 3224|
|26.0||LA 3188 north (Belle Terre Boulevard) to I-10||Southern terminus of LA 3188|
|26.1||LA 3223 (Elm Street)||Northern terminus of LA 3223|
|Reserve||28.4||LA 3179 (East 22nd Street)||Northern terminus of LA 3179|
|29.1||LA 53 (Central Avenue)||Northern terminus of LA 53|
|29.8||LA 637 (West 10th Street)||Northern terminus of LA 637|
|Garyville||33.4||LA 54||Northern terminus of LA 54|
|St. James||Gramercy||36.9||LA 641 LA 3213 south to Gramercy Bridge||Northern terminus of LA 3213|
|38.2||LA 3274 (North Airline Avenue)||Northern terminus of LA 3274|
|Ascension||46.3||I-10 – Baton Rouge, New Orleans|
|46.6||LA 3140||Western terminus of LA 3140|
|Sorrento||50.2||LA 22 – Donaldsonville, Ponchatoula|
|Gonzales||52.4|| LA 431
|Southern terminus of LA 431;
Eastern terminus of LA 30
|54.2||LA 939 (South Purpera Avenue)||Eastern terminus of LA 939|
|54.6||LA 3038 (East Cornerview Street)||Eastern terminus of LA 3038|
|54.9||LA 429 (Weber City Road/East Ascension Street)|
|55.7||LA 44 (North Burnside Avenue)|
|56.7||LA 74||Eastern terminus of LA 74|
|Prairieville||60.8||LA 73 (Old Jefferson Highway)|
|62.0||LA 42 east||South end of LA 42 overlap|
|62.9||LA 427 (Perkins Road)|
|East Baton Rouge||Baton Rouge||65.2|| LA 42 west
LA 948 (Highland Road)
|North end of LA 42 overlap;
Western terminus of LA 948
|68.9||LA 73 (Jefferson Highway)||South end of LA 73 overlap|
|69.2||LA 3246 (Siegen Lane)||Northern terminus of LA 3246|
|69.9||LA 73 (Jefferson Highway)||Interchange;
North end of LA 73 overlap
|71.3||I-12 – Hammond, Baton Rouge||Interchange|
|72.0||LA 426 (Old Hammond Highway)|
|73.7|| US 190 east (Florida Boulevard) – Hammond
US 61 Bus. / US 190 Bus. (Florida Boulevard) – Baton Rouge, Livingston
East end of U.S. 190 overlap
|75.6||LA 37 (Greenwell Springs Road) – Greensburg||Interchange|
|79.0||LA 67 (Plank Road) – Baker-Zachary, Clinton||Interchange|
|79.5||I-110 – Baton Rouge, Natchez – Baton Rouge Metropolitan Airport||Interchange|
|80.3|| US 61 north (Scenic Highway) – Scotlandville
US 61 Bus. / US 190 Bus. – Baton Rouge
North end of U.S. 61 overlap
|Huey P. Long Bridge over Mississippi River|
|West Baton Rouge||Port Allen||82.3||LA 986 (North River Road)||U.S. 190/Airline Highway crosses over LA 986;
Access via LA 1 interchange
|82.7||LA 1 south to I-10 – Port Allen||Interchange;
East end of LA 1 overlap
|85.4||LA 415 south (Plantation Road) to I-10||Interchange|
LA 415 Spur south (North Lobdell Highway)
|Northern terminus of LA 415 Spur|
|86.6||LA 1145 (Calumet Road)||Northern terminus of LA 1145|
|90.6||LA 983 (Bueche Road)||Southern terminus of LA 983|
|95.2||LA 413 (Poydras Bayou Road)|
|Pointe Coupee||97.2||LA 1 north (Wye Road) – New Roads, Marksville||West end of LA 1 overlap|
|100.3||LA 978 (Bigman Lane)||Southern terminus of LA 978|
|Livonia||104.3|| LA 78 (Mississippi River Trail)
LA 411 south (Maringouin Road East) – Grosse Tete
|104.4||LA 77 (Fordoche Road/Maringouin Road West) to I-10 – Grosse Tete, Fordoche|
|106.8||LA 976||Northern terminus of LA 976|
|109.4||LA 81 (Charles Road)|
|Krotz Springs||115.3||LA 975||Interchange;
Northern terminus of LA 975
|Krotz Springs Bridge over Atchafalaya River||West end of U.S. 190 overlap;
Northern/western terminus of Airline Highway
- "News of Metairie and the highway". The Times-Picayune (New Orleans). June 1, 1927. p. 36.
- "Airline route to state capital is feasible project". The Times-Picayune (New Orleans). July 19, 1925. p. 4-1.
- "Opening of airline route announced". The Times-Picayune (New Orleans). July 4, 1933. p. 1.
- "Road to capital cut by opening of new section". The Times-Picayune (New Orleans). July 29, 1933. pp. 2–11.
- "Driving distance to Baton Rouge will be reduced". The Times-Picayune (New Orleans). May 1, 1935. p. 1.
- "Spillway bridge may be ready for use on Saturday". The Times-Picayune (New Orleans). September 24, 1935. p. 1.
- "Throng to rally at Bonnet Carre Spillway today". The Times-Picayune (New Orleans). December 13, 1935. p. 1.
- "Shrewsbury-Kenner Air Line Highway link open to traffic". The Times-Picayune (New Orleans). October 30, 1937. p. 1.
- "Short-cut road on Baton Rouge route is opened". The Times-Picayune (New Orleans). December 20, 1938. p. 3.
- "Air-Line Highway bridge ceremony slated Monday". The Times-Picayune New Orleans States (New Orleans). August 25, 1940. p. 1.
- "Nation's longest toll-free four-lane highway nearing finish". The Times-Picayune New Orleans States (New Orleans). August 17, 1952. p. 2-2.
- "New bridge over spillway opens quietly". The Times-Picayune/The States-Item (New Orleans). March 30, 1984. pp. 1–26.
- U.S. Highways: Bypass U.S. Highways