We are sorry but at this time we are not able to track a flight that uses multiple carriers (called an "interline" flight). For example, if you purchase a roundtrip ticket that has you flying to your destination on United Airlines and returning on Delta Airlines.

Yapta can track the individual segments for each of these flights. However, to track it accurately you must know the individual price of each segment not the entire roundtrip price of the trip. Also, since most of these types of trips are typically purchased through an online travel agent such as Expedia or Travelocity even if the price of one segment drops the Airline will refer you to the point of purchase to reprice the trip and obtain a voucher. For more information see Airlines tracked by Yapta