The Boeing logo is seen at one of the company's facilities in North Charleston, S.C.
An AirTran Airlines Boeing 717-200 lands in Tampa on Jan. 20, 2011.
AirTran has had many special liveries for its Boeing 717s, including this one that was painted in the team colors of the Atlanta Falcons.
Delta Air Lines is set to take most of the Boeing 717s that had flown for one-time rival AirTran. One of the first to be repainted in Delta's colors is seen here in Atlanta in 2013.
Hawaiian Airlines has fewer than 20 717s in its fleet, but that's enough for it to possess the third-most of any U.S. carrier. Hawaiian uses them for flights within Hawaii.
QantasLink, a regional affiliate of Australia's Qantas, was the largest 717 operator outside the USA as of May 7, 2014, according to Flightglobal's Ascend Online Fleets database.
The fleet of Volotea, a Spanish low-cost carrier, consists exclusively of Boeing 717s. The carrier had the 5th-most 717s of any airline in the world as of May 7, 2014, according to Flightglobal's Ascend Online Fleets database.
A Delta 717 lands. Delta is poised to become the world's biggest 717 operator after it finishes taking the 717s flown by one-time rival AirTran.
American Airlines chose this Boeing 737-800 to unveil the carrier's first new paint scheme in nearly four decades on Jan. 17, 2013.
This undated handout image shows a 737-800 series passenger aircraft.
In development now, this model shows what the Boeing's latest version of the 737 -- the 737-MAX -- will look like when it enters service. That's projected to be in 2016, but Boeing already has nearly 2,000 orders for this 737 variant.
Southwest's "Maryland One" -- painted to resemble the Maryland state flag -- is one of the more unique designs among Southwest's 600-plus 737s.
This livery from the late 1960s is a testament to the fact that United Airlines was one of the first carriers to fly the 737.
Southwest Airlines employees turned out in big numbers to get a first look at the carrier's unveiling of its first Boeing 737-800 on March 21, 2012 in Dallas.
Only Southwest has more 737s in its fleet than Irish budget carrier Ryanair.
The 747-8, Boeing's latest variant of its iconic jumbo jet, takes off on its first flight on March 20, 2011. The variant helped ensure the fabled 747 would continue to be produced, at least for now.
The 747 has been popular with cargo airlines, as well. Here a new Boeing 747-8 freighter taxis ahead of its first flight for launch customer Cargolux on Oct. 12, 2011.
A passenger walks past a Delta 747 in the McNamara Terminal at Detroit Metropolitan Wayne County Airport in January 2010. Delta inherited its 747s as part of its merger with Northwest.
The 747 has even had a role in space travel. A modified 747 was used to help move the Space Shuttle between facilities on the ground. Here, the retired Endeavour spacecraft rides a 747 on Sept. 20, 2012.
Many of iconic-but-now-defunct airlines counted the 747 as one of their flagship planes. Among those was TWA, whose 747s are seen here at New York JFK Airport on Jan. 13, 1997.
With about two dozen 747 in its fleet, United Airlines is the top U.S. operator of iconic jumbo jet. Seen here is a United 747-400.
A Lufthansa Boeing 747 lands in Frankfurt. Lufthansa's orders of the 747-8 are likely to keep the jumbo jet in the German carrier's fleet for years to come.
American was the USA's No. 3 operate of 757s as of May 7, 2014, according to Flightglobal's Ascend Online Fleets database.
L'Avion was a French airline that tried using 757-200s for an all-business class product between Paris and New York. The venture launched in late 2006 but was bought in 2008 by British Airways and folded into its BA's similar OpenSkies unit.
A Continental 757-takes off from Los Angeles on June 5, 2008. Many of Continental's 757s were incorporated into the fleet of merger partner United, now the second-biggest 757 operated in the USA.
A Delta 757 does a flyover of Juneau International Airport April 16, 2014. Delta has more 757s in its fleet than any other airline in the world.
A United 757 passes a billboard on approach to Los Angeles International Airport on Jan. 17, 2013.
An Icelandair 757 flying over Greenland. The Icelandic carrier is the largest 757 operator of all passenger airlines outside the USA.
The 757s that flew for Northwest Airlines were incorporated into Delta's fleet when those carrier's merged in 2008.
An American 767 takes off from Miami International on Oct. 14, 2011.
ANA was the world's top 767 operator outside the USA as of May 7, 2014, according to Flightglobal's Ascend Online Fleets database.
An All Nippon Airways 767 makes its way through Boeing's assembly line in Everett, Wash., on July 3, 2003.
This image from Boeing shows a 767 decked out in a traditional Boeing livery. More than 1,000 767s have been delivered since the jet debuted in the early 1980s.
Delta shows off its then new-color scheme in this 1997 photo of a 767 at Hartsfield Atlanta International Airport.
An Ethiopian Airlines Boeing 767-300ER.
The 767 has been popular among cargo carriers as well as with passenger airlines. This 1995 photo shows a UPS 767 cargo plane.
American was the USA's No. 2 operator of 777s as of May 7, 2014, according to Flightglobal's Ascend Online Fleets database.
This artist's concept provided by The Boeing shows the 777-9X, which -- along with the 777-8x -- is set to become the latest of the 777 variants. The planes aren't scheduled to be delivered to airlines until next decade.
A Delta Air Lines Boeing 777.
Emirates flies more 777s than any airline in the world. Here, an Emirates Airlines Boeing 777 lands at Logan International Airport in Boston on March 10, 2014.
Among U.S. companies, only United and American have more 777s than FedEx.
United is the USA's No. 2 operated of 777s.
An Air France 777 sporting the logo of the SkyTeam frequent-flier alliance. Air France was the world's No. 3 operator of 777s as of May 7, 2014, according to Flightglobal's Ascend Online Fleets database.
All Nippon Airways Boeing 787 planes sit on a tarmac at Haneda Airport in Tokyo on April 26, 2013.
All Nippon Airways made aviation history on Oct. 26, 2011, by flying the Boeing 787 Dreamliner on its first-ever flight with paying passengers. ANA Flight 7871 departed Tokyo at 12:23 p.m. local time, landing in Hong Kong about 4 hours later.
Japan Airlines takes delivery of its 787 on March 26, 2012, at Paine Field in Everett, Wash.
A United Dreamliner arrives at Chicago O'Hare on Nov. 4, 2012.
United become the first North American airline to fly the Dreamliner in 2012.
A United Dreamliner takes off from Los Angeles International Airport on Jan. 9, 2013.
Boeing promised its 787 would open up long-haul routes from medium-sized markets. British Airways launched Austin-London service in March 2014.