Papilio cresphontes, the Giant Swallowtail, can be found in numerous states in every region of the country, including Alaska.
Favorite nectar plants include: Asclepias, Carduus, Cirsium, and Lantana
USDA Growing Zones for these plants include: 3,4,5,6,7,8,9,10

Host plants:
Amyris elemifera
Casimiroa edulis
Choisya
Choisya dumosa
Citrus
Citrus aurantium
Citrus limon
Citrus maxima
Citrus sinensis
Dictamnus
Dictamnus albus
Humulus lupulus
Nyssa sylvatica
Persea borbonia
Piper
Populus
Populus nigra
Ptelea trifoliata
Ruta graveolens
Staphylea trifolia
Zanthoxylum
Zanthoxylum americanum
Zanthoxylum caribaeum
Zanthoxylum fagara
Zanthoxylum hirsutum