Alaska

number: max. of 2 carry-on
size: max. 10"x 17" x 24"
(51 linear inches combined)
notes: laptops,purses, backpacks count -all items must fit in sizer together

number: up to 2
size: 62 linear inches max each
weight: 70 lbs. max each

America West

number: max. of 2 carry-on
(3 total carry-on & checked)

number: up to 3
(3 total carry-on & checked)

American Airlines

number: max. of 2 carry-on
(3 total carry-on & checked)
size: 9" x 13" x 23" total

number: up to 3
(3 total carry-on & checked)
size: 1st-62, 2nd--55 and
3rd--45 linear inches maximum.
weight: 70 lbs. max each

Continental

number: max. of 2 carry-on
(3 total carry-on & checked)

number: up to 3
(3 total carry-on & checked)
size: 1st-62, 2nd--55 and
3rd--45 linear inches maximum.
weight: 70 lbs. max each

Delta

number: max. of 2 carry-on
(3 total carry-on & checked)
size: 9" x 14" x 22"
notes: laptops, briefcases, backpacks count purses don't / items must fit in sizer

number: up to 3
(3 total carry-on & checked)
size: 1st-62, 2nd--55 and
3rd--45 linear inches maximum.
weight: 70 lbs. max each

Northwest

number: max. of 1 carry-on
size: 9" x 14" x 22"
weight: 40 lbs. max total
notes: purses, briefcases and laptop computers don't count

number: up to 2

Southwest

number: max. of 2 carry-on
size:10" x 16" x 24"
notes: backpacks, briefcases and laptops count / small purses don't / bags must fit sizer

number: up to 3
size: 62 linear inches max each
weight: 70 lbs. max each

TWA

number: max. of 2 carry-on
size:10" x 16" x 24"
weight: 50 lbs. max total
notes: purses, briefcases and laptops count / coats don't

number: up to 2
size: 62 linear inches max each
weight: 70 lbs. max each

United

number: max. of 2 carry-on
size: 9" x 14" x 22"
notes: small purses don't count

number: up to 2
size: 1st-62, 2nd--55 linear inches maximum.
weight: 70 lbs. max each

USAirways

number: max. of 2 carry-on
(3 total carry-on & checked)
size: 8"x16"x 21"-underseat
10"x16"x24"-overhead bin
4"x23"x45"-valet
weight: 40 lbs.combined
notes: briefcases and laptops count / purses don't

number: up to 3
(3 total carry-on & checked)
size: 62x55x45 linear inches max.
weight: 70 lbs. max each

British Airways

number: max. of 1 carry-on
size: 115 cm (46") max
weight: 13 lbs. max
notes: first and business class are allowed 2 carry-on bags

number/size:
domestic: 1 -- 158 cm (62") max
via us: 2-- 158 cm (62") max
weight:
domestic: 1 -- 32 kg (70 lb.) max
via us: 2-- 32 kg (70 lb.) max each

Lufthansa

number: 1 carry-on (economy)
size: 55x40x20 cm max
weight: 8 kgs. max
notes: first and business class are allowed 2 carry-on bags

restrictions not listed

Qantas

number: max. of 1 carry-on
size: 100 cm (39") max
weight: 5 kg (11 lbs.) max
notes: first and business class are allowed 2 carry-on bags / domestic allowed 2 carry-on bags, all classes

number/size:
domestic: 1 -- 140 cm (54") max
int'l: 2-- 140 cm (54") max
weight:
domestic: 1 -- 32 kg (70 lb.) max
via us: 2-- 32 kg (70 lb.) max each
notes: first and business class are allowed larger/heavier bags