$1,911,494,699,999 USD to be exact.
I don’t need to tell you jet planes are expensive. Very expensive. Spoiler alert: you (probably) can’t afford one.
That said, commercial airliners are abundant as a quick look on Flightradar24 will confirm.
At hundreds-of-millions a piece; what is the value of the current fleet of commercial airliners in the sky?
Methodology
I used the average cost of a commercial jet model as supplied by the manufacturers who dominate the commercial market, Airbus and Boeing.
Fleet data was obtained from AirFleets for the SkyTrax top 100 airlines (2015).
Total price values were calculated using average cost of model and most popular model variation in operation. For example, count of the more popular A350-800 was used over the A350-1000 variant.
Aircraft data (seat numbers) was obtained from Wikipedia.
Analysis
Most expensive planes
Unsurprisingly the massive Airbus A380 is the most expensive commercial airliner. All of the top 10 planes by price are worth more than $300 million USD each.
Most expensive cost per seat
The A380 represents represents a high cost efficiency per seat (rank 15th @ 0.82$ million USD / seat).
The A350-1000, 777-9, and 777-200LR all have per seat values of over $1 million USD (cost / number of seats). This is a rough calculation assuming the maximum number of seats are installed (in many cases this does not happen).
Total value of planes by type
Did you know? The cost of planes for all of SkyTraxs top 100 airlines (new) is $1,911,494,699,999 USD.
The Boeing 777 ($340 million / each), 1214 in operation , have a cumulative new value of $412,274,400,000 USD (412 USD billion).
The cheaper 737s ($110 million / each), of which there are 3471 planes in the sky (25% of all commercial aircraft) (almost 3x the 777), have a total combined value of $381,810,000,000 USD (382 USD billion). Southwest operates 710 737s. Bought new these would cost $78,100,000,000 USD (78 USD billion).
Boeing versus Airbus
Although Airbus offers the most expensive plane for sale (the A380 @ $432 million USD), the new cost of all Boeing planes in the sky is much higher than Airbus.
There are over $1 trillion USD of planes flying from Boeing (one trillion sixty-eight billion seven hundred thirty-one million seven hundred thousand), whilst Airbus has just $800 billion USD (eight hundred forty-two billion seven hundred sixty-three million).
Improvements
All the calculations and variable values (plane cost, seats on aircraft, ticket cost, etc) are nowhere near accurate and should only be taken as a generalisation.
Should true data be obtainable, values for these variables would greatly improve the accuracy of all data and calculations used in this post.
tl;dr
The cost of planes for all of SkyTraxs top 100 airline (new) is $1,911,494,699,999 USD.
Footnotes
Data sources + data used in this post.