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Boeing757100
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What aircraft are the least fuel efficient in Delta fleet?

Mon Jun 29, 2020 2:46 pm

I know that Delta has one of the oldest fleets, but they are also know to be more reliable. That got me thinking, what are the least fuel efficient planes in Delta?

I'm talking about flights of 1,750–3,400 nmi. On wikipedia, it gives a table, which I will list here:
https://en.wikipedia.org/wiki/Fuel_econ ... ple_values

In that table, the 757-200W is sadly one of the least efficient. (78 mpg per seat) The plane thankfully fares better on shorter flights of 1,000 nmi, especially the 753. 763ERs that seat 218 passengers follow up even worse though at 76 mpg per seat. 767-300ERs that seat closer to 300 people fare slightly better, at over 80 mpg per seat. The 777-200s usually are around 80 mpg per seat. The classic A330s vary from the mid to late 70 mpg per seat. If it was before 2018, the 744 would be on here, and if DL still had 762s, they'd be some of the worst offenders.

I don't know. I'm not good at finding out calculations, so this Wikipedia table really helped.
 
burnsie28
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Re: What aircraft are the least fuel efficient in Delta fleet?

Mon Jun 29, 2020 2:58 pm

The problem with those charts is that it's far too broad and differs. For instance maybe Frontier puts nearly 180 pax on their A320's and at what weight vs a 160 seat A320 etc. What type of paint and how much does it weight etc? So what is on wikipedia won't give you an accurate number by any means as it relates to airlines configuration.
 
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Boeing757100
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Re: What aircraft are the least fuel efficient in Delta fleet?

Mon Jun 29, 2020 2:59 pm

burnsie28 wrote:
The problem with those charts is that it's far too broad and differs. For instance maybe Frontier puts nearly 180 pax on their A320's and at what weight vs a 160 seat A320 etc. What type of paint and how much does it weight etc? So what is on wikipedia won't give you an accurate number by any means as it relates to airlines configuration.



Yeah that is a problem. For example, those show 243 seat 753s, when delta used 234 seat 753s.
 
simairlinenet
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Re: What aircraft are the least fuel efficient in Delta fleet?

Mon Jun 29, 2020 4:17 pm

Analysis on U.S. airline fuel efficiency can be done using this data table. Be sure to filter SVC_CLASS to only Z.

https://www.transtats.bts.gov/DL_Select ... ble_ID=254
 
MIflyer12
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Re: What aircraft are the least fuel efficient in Delta fleet?

Mon Jun 29, 2020 5:11 pm

Boeing757100 wrote:
I know that Delta has one of the oldest fleets, but they are also know to be more reliable. That got me thinking, what are the least fuel efficient planes in Delta?


Any reason you're looking at fuel efficiency instead of total cost per seat-mile?

Newer vs. older is a poor guide. You can look at AA/DL/UA annual reports for 2019 and get both gallons burned and ASMs.

UA's fleet is older than DL's but gets more ASMs per gallon: 66.4 vs. 65.3 (UA relies more on RJs, and specifically small single-class RJs, but the 787s help.)

DL's fleet is older than AA's but gets more ASMs per gallon. 65.3 vs 62.8 (IMHO, too many 319s and 738s at AA. Post-merger for a larger carrier they should have been taking a higher mix of A321s and 739s.)

Go ahead and look at WN and NK (88.7), too, and see what single-cabin, all mainline does for fuel efficiency. WN reports ASMs per gallon directly: 75.7 in 2019.
 
debonair
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Re: What aircraft are the least fuel efficient in Delta fleet?

Mon Jun 29, 2020 5:24 pm

Somehow I miss the B717 in the table...

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