Amtrak with Wings (Delta Airlines nickname)

The television show Late Night with David Letterman had this in a “Top 10 New Advertising Slogans for Delta Airlines” on July 16, 1987:
   
“10. Delta: We’re Amtrak with Wings.”
 
Delta Air Lines is one of the major airlines of the United States. Amtrak is a passenger railroad service with a mediocre reputation.
 
“Amtrak of the Sky” is a similar airline nickname. Related nicknames for Spirit Airlines include “Greyhound Bus with Wings,” “School Bus with Wings” and “Waffle House with Wings.”
         
 
Wikipedia: Delta Air Lines
Delta Air Lines, Inc., typically referred to as Delta, is one of the major airlines of the United States and a legacy carrier. It is headquartered in Atlanta, Georgia. The airline, along with its subsidiaries and regional affiliates, including Delta Connection, operates over 5,400 flights daily and serves 325 destinations in 52 countries on six continents. Delta is a founding member of the SkyTeam airline alliance.
 
Wikipedia: Amtrak
The National Railroad Passenger Corporation, doing business as Amtrak (reporting marks AMTK, AMTZ), is a passenger railroad service that provides medium and long-distance intercity service in the contiguous United States and to nine Canadian cities.
     
Late Night with David Letterman
Top Ten List Archive for 1987
July 16, 1987
Top 10 New Advertising Slogans for Delta Airlines
10. Delta: We’re Amtrack with Wings.
   
Google Groups: rec.humor
Dave Letterman’s Top Ten lists (1 of 8)
Henry Churchyard
May 8, 1992, 8:00:58 PM
(...)
Top 10 New Advertising Slogans for Delta Airlines - July 16, 1987
 
10. Delta: We’re Amtrack with Wings.
 
Google Groups: rec.humor.funny.reruns
A top 15 list from the Dave Letterman Show
Steve Alter
Mar 16, 1997, 3:00:00 AM
The Top 15 Advertising Slogans for Delta Air Lines
—————————————————————————
1. Delta: We’re Amtrak with wings.
 
Google Groups: soc.culture.vietnamese
[Laughs] A top 15 list from the Dave Letterman Show
Tuyet Pham
Mar 26, 1997, 3:00:00 AM
The Top 15 Advertising Slogans for Delta Air Lines
—————————————————————————

1. Delta: We’re Amtrak with wings.
           
Twitter
cowsay
@cowsay
Delta: We’re Amtrak with wings.  —David Letterman
10:10 AM · May 16, 2009·Twitter Web Client
 
Twitter
Brent Clanton, Reality Czar
@brentclanton
Replying to @JimF62019996 and @TruthGundlach
The only thing worse than the way the airlines are operating now would be if our federal government began to operate the airlines: Amtrak with wings.
11:13 AM · Mar 20, 2020·Twitter Web App
 
Twitter
Raspberry Arduino
@RaspiArduino
Delta: We’re Amtrak with wings.  —David Letterman
5:24 PM · Jul 14, 2021·Raspberry Arduino
 
Twitter
Marcus Forealius
@GoobermentHQ
Replying to @hemakhemak and @LPTexas
The airline industry would’ve went under already if it were not subsidized by the taxpayer. They’re Amtrak with wings.
2:10 PM · Aug 6, 2021·Twitter for iPhone