Or do they use another airline?

They do not fly their own planes unless it is in Alaksa to deliver mail. They mostly rent out space aboard Fedex Flights in trade for delivering some of their ackages that are in rural areas.

Actually mail is carried on all commercial flights. Airmail was actually the first type commercial aviation operation. The early days were quite crude with pilots not having nav aids but rather a road map & would fly close to the roads & follow them for direction. The very first airmail flight was a complete failure with the pilot getting lost in bad weather & ended up in the wrong town. That is ur fun fact for the day. Hey my degree in Aviation Management paid off finally!

They used to have a Boeing 727, but now they have mail carried on commercial flights, in the cargo hold under the cabin.

Well, UPS has a variety of aircraft, here r their specs..


AIRCRAFT
Every aircraft in UPS is fleet meets the strictest noise-reduction standards. UPS was the first major airline in North America to reach full fleet compliance with the new noise rules. Our fleet currently includes 747's, 757's, 767's, A300-600's, DC-8 is & MD-11's. UPS now operates or has on firm order a global fleet totaling over 300 aircraft.

757 Aircraft
Compartment Load Capacity
Main: 15 - 88'' x 125'' positions (224cm. x 318cm.)
Belly A: 700 cu. ft. (19.8 cu. m.)
Belly B: 1,090 cu. ft. (30.9 cu. m)

Cargo Door Dimensions
Main Cargo Door 86'' x 134'' (218cm. X 340cm.)
Lower Forward Door 44'' x 55'' (112cm. X 140cm.)
Lower Aft Door 44'' x 55'' (112cm. X 140cm.)
topBack to Top


DC8 Aircraft
Compartment Load Capacity
Main: 18 - 88'' x 125'' positions (224cm. x 318cm.)
7,850 cu. ft. (222.4 cu. m.)
Belly A: 855 cu. ft. (24.2 cu. m.)
Belly B: 435 cu. ft. (12.3 cu. m.)
Belly C: 780 cu. ft. (22.1 cu. m.)
Belly D: 430 cu. ft. (12.2 cu. m.)

Cargo Door Dimensions
Main Cargo Door 140'' x 85'' (356cm. X 216cm.)
Lower Forward Door A 63'' x 54'' (160cm. X 137cm.)
Lower Forward Door B 44'' x 36'' (112cm. X 91cm.)
Lower Aft Door C 63'' x 54'' (160cm. X 137cm.)
Lower Bulk Door D 36'' x 44'' (91cm. X 112cm.)
topBack to Top


767 Aircraft
Compartment Load Capacity
Main: 24 - 88'' x 125'' positions (224cm. X 318cm.)
11 - 96'' x 125'' positions (244cm. X 318cm.)
Belly A: 4 - 88'' x 125'' x 64'' (224cm. X 318cm. X 163cm.)
96'' x 125'' x 64'' (244cm. X 318cm. X 163cm.)
Belly B: 3 - 88'' x 125'' x 6'' (224cm. X 318cm. X 163cm.)
96'' x 125'' x 64'' (244cm. X 318cm. X 163cm.)

Cargo Door Dimensions
Main Cargo Door 103'' x 134'' (262cm. X 340cm.)
Lower Forward Door A 67'' x 134'' (170cm. X 340cm.)
Lower Aft Door 67'' x 134'' (170cm. X 340cm.)
Lower Bulk Door 38'' x 45'' (97cm. X 114cm.)

Lower Deck
7 - 88'' x 125'' x 64'' 2,555 cu. ft (72.4 cu. m.)
or 7 - 96'' x 125'' x 64'' 4,004 cu. ft (113.4 cu. m.)
Bulk Cargo Area 430 cu. ft (12.2 cu. m.)
topBack to Top


A300

Compartment Load Capacity
Main: 22 - 88'' x 125'' positions (224cm. x 318cm.)
Belly A: 5-88'' x 125'' x 64'' positions (224cm. X 318cm. X 163cm.)
Belly B: 3-88'' x 125'' x 64'' positions (224cm. X 318cm. X 163cm.)

Cargo Door Dimensions
Main Cargo Door 141'' x 102'' (358cm. X 259cm.)
Lower Forward Door A 106'' x 70'' (270cm. X 178cm.)
Lower Aft Door 71'' x 68'' (180cm. X 173cm.)
Lower Bulk Door 37'' x 25'' (94cm. X 64cm.)

Lower Deck
Forward cargo compartment:
4 - 88'' x 125'' x 64'' 1,460 cu. ft (41.5 cu. m.)
or 96'' x 125'' x 64'' 2,288 cu. ft (64.8 cu. m.)
Aft cargo compartment:
3 - 88'' x 125'' x 64'' 1,095 cu. ft (31.3 cu. m.)
or 96'' x 125'' x 64'' 1,716 cu. ft (48.6 cu. m.)
Bulk cargo area 611 cu. ft (17.3 cu. m.)
topBack to Top


MD-11

Compartment Load Capacity
Main: 22 - 96'' x 125'' positions (224cm. x 318cm.)
4 - 88'' x 125'' positions (244cm. x 318cm.)
Or: 26 - 88'' x 125'' positions (224cm. X 318cm.)
Belly A: 6 - 88'' x 125'' x 64'' (224cm. X 318cm. X 163cm.)
Belly B: 7 - 60.4'' x 125'' x 64'' (153cm. X 318cm. X 163cm.)

Cargo Door Dimensions
Main Cargo Door 140'' x 102'' (356cm. X 260cm.)
Lower Forward Door A 104'' x 66'' (256cm. X 168cm.)
Lower Aft Door 70'' x 66'' (178cm. X 168cm.)
Lower Bulk Door 36'' x 30'' (92cm. X 76cm.)

Lower Deck
Forward cargo compartment:
6 - 88'' x 125'' x 64'' 2,190 cu. ft (62.0 cu. m.)
Aft cargo compartment
7 - 60.4'' x 125'' x 64'' 1,771 cu. ft (50.4 cu. m.)
Bulk cargo area 510 cu. ft (14.5 cu. m.)
topBack to Top


747-100 Aircraft

Compartment Load Capacity
Main: 29-88'' x 125'' positions (224cm. x 318cm.)
29-96'' x 125'' positions (224cm. x 318cm.)
Belly A: 5 - 88'' x 125'' x 64'' (224cm. X 318cm. X 163cm.)
Belly B: 4 - 88'' x 125'' x 64'' (224cm. X 318cm. X 163cm.)
Belly C: 1,000 cu. ft. (28.3 cu. m.)

Cargo Door Dimensions
Main Cargo Door-Left Side 120'' x 134'' (305cm. X 340cm.)
Lower Forward Door 66'' x 104'' (168cm. X 264cm.)
Lower Aft Door 66'' x 104'' (168cm. X 264cm.)
Lower Bulk Door 44'' x 47'' (112cm. X 119cm.)
topBack to Top


747-200 Aircraft

Compartment Load Capacity
Main: 30 - 88'' x 125'' positions (224cm. x 318cm.)
30 - 96'' x 125'' positions (224cm. x 318cm.)
Belly A: 5 - 88'' x 125'' x 64'' (224cm. X 318cm. X 163cm.)
Belly B: 4 - 88'' x 125'' x 64'' (224cm. X 318cm. X 163cm.)
Belly C: 1,000 cu. ft. (28.3 cu. m.)

Cargo Door Dimensions
Main Cargo Door 120'' x 134'' (305cm. X 340cm.)
Lower Forward Door 66'' x 104'' (168cm. X 264cm.)
Lower Aft Door 66'' x 104'' (168cm. X 264cm.)
Lower Bulk Door 44'' x 47'' (112cm. X 119cm.)