Yapta revealed today that it had added an additional $2 million to its previously announced $4.2 million Series D round. The additional money was raised from global distribution system Amadeus, and adds to what had been raised from Concur and its Concur Perfect Trip Fund.

Yapta enables travelers to enter their flight details, receive notifications when the fare drops before they fly, and claim refunds from the airline.

To this day, many consumers aren’t aware that these sorts of services are available from certain airlines, including Alaska Airlines, AirTran, JetBlue, American Airlines, Delta Air Lines, Hawaiian, United, US Airways, and Virgin America, for instance.

Founded in 2007, Yapta has been pivoting toward the corporate travel market, where it sees the largest growth opportunity. In July 2012 it hired James Filsinger as CEO. Filsinger was earlier CEO a travel-payment joint venture between Amadeus and Sabre.

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