I don't see why not. They don't check your credit rating when you board an airline.
Yes, a US resident can travel to Canada.
Yes, as a US permanent resident, you can travel to Canada.
Yes, a US permanent resident can travel to Japan. They will need to obtain a visa before traveling to Japan.
Yes if you have a passport
Yes
Yes, provided you have an American passport.
Yes, but you have to have your passport
Yes, a US permanent resident needs an Electronic Travel Authorization (eTA) to visit Canada.
A US resident permit allows a foreign national to live and work in the United States. In relation to Lufthansa, having a US resident permit may be necessary for employment or travel purposes with the airline.
http://wiki.answers.com/Q/How_soon_you_can_travel_after_becoming_a_permanent_resident"
Yes, a US permanent resident can travel to Colombia. They will need a valid passport and may also need a visa depending on their country of citizenship. It is recommended to check the specific entry requirements before traveling.
Hawai'i is a US state, therefore no passport is needed for US citizens to travel to or from Hawai'i. Hawaii is part of the United States. Therefore, if you are a Citizen or a Permanent Resident(Green Card holder) you won't be needing a passport to go there. DL will do.