Online travel agency CheapAir became the first in its industry to accept bitcoin, and now has opened up Dogecoin and Litecoin payment options. Since embracing bitcoin in November 2013, CheapAir has generated $1.5 million in cryptocurrency sales, which is why the company has decided to support Dogecoin and Litecoin.

When consumers typically think of cryptocurrencies, bitcoin is the first that comes to mind - but Litecoin, Dogecoin, and scores of others are gaining a strong following from consumers and businesses. Customers purchasing via cryptocurrencies can still mix-and-match flights from multiple airlines, and is still supported by the CheapAir Price Drop Payback offering.

"We try to make travel as easy as possible for customers, and letting people pay the way they want to pay is a big part of that," said Jeff Klee, CheapAir CEO, in a statement. "Bitcoin, Litecoin and Dogecoin represent promising technologies that can make transacting online faster, easier, less expensive, and more secure. We admire cryptocurrency early adopters and we're thrilled to support them."