In terms of fins that fit the airline carry on limit, here are the lengths and weights of some that do to some that likely do not. (as of Feb 2020)
- Force Fin Hockey -- XL 18 x 8.5", 4.6 lb., slight negative
Underwater Hockey Force Fin – Force Fin
- Hollis F2 -- XL 19.7", 1.7 lb.
- Aeris Accel - XL 21", < 3 lb.
Accel
- SP Jets -- 21.8", 5.25 lb. v. negative
https://scubapro.johnsonoutdoors.com/fins/fins/jet-fin-w-spring-heel-strap
- SP Go Travel -- XL 22", 2.6 lb,
Scubapro Go Travel Fin
- Deep6 Eddy -- XL 22", 2.5 lb.
Deep 6 Eddy Flippers
- APEKS RK3 -- XL 22.5 x 9.5", 2.75 lb, neutral
- Mares Quattro Excel Plus - XL 25", 6.2 lb.
Mares Excel Plus, Open Heel Fins
- Dive Rite XT - XL 26 x 9", 6.3 lb.
XT Fins with Stainless Buckles | Dive Rite
With just blade length specs:
- Mares Avanti Quattro - R 15" blade, 2 lb. neutral
Avanti Quattro +
Fin Recommendation