Boeing 747-100 to 747-8: how to identify every Jumbo variant

Four engines, one hump, and everyone at the fence knows right away: Jumbo. For you as a spotter, though, the work only starts there. Between the first 747-100 of 1969 and the last 747-8F of 2023 lie more than five decades, several generations and a whole series of special versions. This guide shows you how to identify the Boeing 747 variants by upper deck, wingtips and engines – from the side, from below on approach and even when a windowless freighter floats over the fence.

Identifying 747 variants: the short answer

Three looks are enough in most cases:

1. Wingtips: Straight, rounded ends without an add-on mean a Classic 747 (-100, -200, SP or -300). Upturned winglets mean a 747-400. Tips raked back at an angle, known as raked wingtips, mean a 747-8.
2. Upper deck: A short hump that ends well ahead of the wing leading edge belongs to the -100, -200 or a factory-built freighter. A long hump with many windows shows the -300, the -400 or the 747-8I.
3. Engines: Serrated trailing edges on the nacelles, the chevrons, appear in the 747 family only on the 747-8 with its GEnx engines.

If you still have doubts after that, the fuselage helps: the 747-8 looks clearly more stretched than all the others, the 747SP strikingly short and stubby.

The 747 family at a glance

The Boeing 747 first flew on February 9, 1969, and entered service with Pan Am in January 1970. Boeing then developed the type further in several steps. Spotters usually group the early versions together as the Classic 747, followed by the 747-400 and, as the finale, the 747-8.

Version	In service from	Upper deck	Wingtips	Length / wingspan	ICAO code
747-100	1970	short	straight	about 70.6 m / 59.6 m	B741
747-200	1971	short	straight	about 70.6 m / 59.6 m	B742
747SP	1976	short, looks set back	straight	about 56 m / 59.6 m	B74S
747-300	1983	long	straight	about 70.6 m / 59.6 m	B743
747-400	1989	long (freighter: short)	winglets	about 70.7 m / 64.4 m	B744
747-8	2011 (8F), 2012 (8I)	long (freighter: short)	raked wingtips	about 76.3 m / 68.4 m	B748

The lengths of the Classic versions and the 747-400 are so close together that you can’t tell them apart with the naked eye. The wingspan, on the other hand, grows from generation to generation – on the -400 through a wing extension plus winglets, on the -8 through the redesigned wing with the raked tips.

Feature 1: the upper deck

The hump is the trademark of every 747, and its length is the most important distinguishing feature within the family.

• 747-100 and -200: The hump is short and ends well ahead of the wing leading edge. The very first 747-100s had only three windows per side on the upper deck because a lounge was originally located there. Later aircraft mostly got ten windows per side. Some early -200s also still flew with three windows.
• 747-300: Boeing extended the upper deck about seven meters farther back. The hump now reaches roughly to above the wing leading edge, and the upper row of windows is correspondingly long. Swissair was the launch customer, and the type entered scheduled service in 1983. Only 81 were built.
• 747-400: The passenger version took over the long upper deck of the -300. From the side, the fuselage looks almost identical – the wings make the difference.
• 747-8I: The upper deck is extended once more, with the row of windows above it correspondingly longer. Together with the stretched fuselage, this makes for the most elegant and also longest Jumbo silhouette.

One trap is Classic Jumbos with a retrofitted long upper deck. Some airlines had older 747-100s and -200s converted to the stretched upper deck, known in the trade as SUD for Stretched Upper Deck. These aircraft look confusingly similar to a 747-300. Only the registration brings certainty then – you’ll find more on the 747-300 and its lookalikes in the profile.

Feature 2: wingtips and winglets

The wingtips are the surest way to separate the three generations, especially when a Jumbo flies over you.

• Classic 747 (-100, -200, SP, -300): The wings end straight and slightly rounded, without any add-on.
• 747-400: Boeing extended the wings and added upturned, slightly outward-canted winglets. The wingspan grew to about 64.4 meters as a result. The only exception is the 747-400D for Japanese domestic service, which was delivered without winglets. It is historic today.
• 747-8: Instead of winglets, the wings end in flat, raked wingtips swept back at an angle, similar to the 787. The wingspan is about 68.4 meters.

The rule of thumb is therefore: winglets = 747-400. If there are no winglets, you have to decide between Classic and 747-8 – and engines and fuselage length help with that. How winglets, sharklets and raked wingtips differ in general is explained in the guide winglets, sharklets and raked wingtips.

Feature 3: the engines

All 747s have four engines, but not the same ones. For identification, the nacelle is what matters most.

• 747-100: It flew from the factory with the Pratt & Whitney JT9D. The nacelles look slim and compact compared to later Jumbos.
• 747-200 and -300: Besides the JT9D, airlines could choose the General Electric CF6 and the Rolls-Royce RB211-524. The nacelle shapes differ by manufacturer, but all have smooth trailing edges.
• 747-400: Depending on the airline, the Pratt & Whitney PW4000, the CF6-80C2 or the Rolls-Royce RB211-524G/H hung under the wing. They also have smooth nacelle edges.
• 747-8: It flies exclusively with the GEnx-2B from GE Aerospace. The nacelles have serrated trailing edges that reduce noise. These chevrons are the surest single feature of the 747-8, even from a greater distance.

How to tell engine manufacturers apart by fan, nacelle and exhaust is shown in the article how to identify engines.

Feature 4: fuselage proportions

When wingtips and engines are hard to see, for example head-on or in backlight, the proportions help.

• 747-8: At about 76.3 meters, it is a good 5.6 meters longer than the 747-400. The fuselage looks visibly stretched ahead of and behind the wing, and the aircraft almost slim.
• 747SP: The fuselage is about 14 meters shorter than on the -100. Behind the wing, only a few rows of windows remain up to the tail, and the vertical stabilizer is taller and looks almost oversized. The hump seems to sit farther back because a piece of fuselage is missing up front. The SP has only four instead of five cabin doors per side.
• All other versions: the -100, -200, -300 and -400 share practically the same fuselage length. Here you have to fall back on upper deck and wingtips.

The 747SP is the rarest production version: Boeing built only 45, intended for very long nonstop routes. In scheduled service, it is historic today.

If you tend to mix up a Jumbo with the Airbus double-decker, the comparison telling the A380 and Boeing 747 apart helps.

Freighters, Combis and special versions

A large share of the Jumbos flying today are freighters. Their own rules apply.

• Factory freighters (747-200F, 747-400F, 747-8F): short hump, no windows on the main deck and a hinged-up nose, which you recognize by the seam below the cockpit. The 747-400F has winglets, the 747-8F raked wingtips, chevrons and the long fuselage.
• Converted freighters: Former passenger jets keep their original upper deck, so converted 747-400s have the long hump. The windows are closed off, a large side cargo door sits at the rear left, and a nose door is missing.
• Combi (747-400M): Passenger aircraft with a continuous row of windows but an additional large cargo door at the rear left. KLM shaped the type.
• Dreamlifter: four converted 747-400s with a hugely bulged fuselage and a swing tail for transporting 787 components. Unmistakable, ICAO code BLCF.
• Shuttle Carrier Aircraft: two converted early NASA 747s with support struts on the fuselage top and end plates on the horizontal stabilizer. Historic.

An overview of all major freighter types is offered by the guide how to identify freighter aircraft.

Type codes and registrations: the final certainty

Some pairs can hardly be told apart from the outside. This applies above all to the 747-100 and -200: both have the short upper deck and straight wingtips and were delivered with similar numbers of windows. A -300 and a Classic with SUD also look practically the same. In such cases, a look at the data helps.

On live maps and flight schedules, the variants appear with their ICAO type designator: B741, B742, B743, B744, B74S and B748, plus special codes such as B74R for the Japanese short-haul SR version, B74D for the 747-400D and BLCF for the Dreamlifter. What the abbreviations mean and how they are built is explained in the guide ICAO type codes explained. Note: the codes don’t distinguish between passenger aircraft and freighter. B744 stands for the -400 just as for the 400F and the Combi, B748 for the 747-8I and 747-8F.

Through the registration, you get to the serial number and thus to the exact version. How that works is shown in the article how to find and track an aircraft by registration.

The reliable sequence at the fence

Where you can see the variants today

In passenger service, the 747 has become rare. In Germany, Frankfurt Airport is the first address: as of October 2026, Lufthansa operates the 747-8 there and a shrinking number of 747-400s, whose retirement Lufthansa plans in the coming years according to media reports. You get good views of the runways at the Zeppelinheim viewing platform.

Freighters are much more common. Cargolux flies exclusively 747-400Fs and 747-8Fs and was the launch customer of the 747-8F. US cargo airlines such as Atlas Air, Kalitta Air and UPS add to that. At Leipzig/Halle Airport, you see Jumbo freighters regularly, for example from the observation deck. If you want lots of freighters at once, head to Anchorage, where transpacific cargo flights make stopovers.

For the Classic versions, the way leads to a museum. At the Technik Museum Speyer, a former Lufthansa 747-200 stands on a platform and can be walked through, a nice place to study the short upper deck up close. The very first Jumbo, the prototype N7470, is shown by the Museum of Flight in Seattle.

Common mistakes

• Taking every 747 without winglets for a Classic: The 747-8 has no winglets either. The raked tips are flat and barely noticeable at a distance – so check the engines as well.
• Reading the short hump as a sign of an old 747: The factory freighters 747-400F and 747-8F also have the short upper deck. Winglets or chevrons show you that they are young.
• Automatically classifying a long upper row of windows as a -400: Without winglets, it’s a -300 or an SUD conversion.
• Mistaking a 747-400 with closed-off windows for a factory freighter: Converted freighters have the long hump and no nose door. The factory freighter has the short hump.
• Overrating the type code: B744 and B748 say nothing about whether a passenger jet or a freighter is coming.