Multi Destination Flight ComparisonComparison of multi-target flights
Kayak Explore or the destination "Everywhere" in Google Favorites Explore to get an overview. Reserve the flight on the airlines website or on a third-party reservation page (e.g. xpedia/orbitz) - depending on which one is able to reply to the flight found in #1.
Reserving seperate airline seats can be less expensive than reserving them on one seat - especially if you can use low cost carriers. Note: If your first flight is late, your next flight is not safe - it's a miss - so don't make close calls on extra fares.
Find a tutorial on how to book your own individual ticketing in this threads. However, AA usually protects one-world one-way ticketed bookings made independently. Here is a great article about the precautions and implications of disconnected ticketing. Further hints on how to book your itinerary. Open search: Try the ITA grid if you want to find across more than one origin or destination.
If you have a permanent source but are interested in several goals, use Google Flights Explore or Kayak Explore or Skyscanner. It is possible to type several airports in start or destination field in Google Flights and ITA-Matrix. Use caution when making reservations through third-party agents. Minor "discounts" that you will find on kayaks and skyscanners, as well as low cost airlines, flight hub, etc. also have similar issues.
Because I don't want to write anything slanderous, this is just a Google results related caveat. Have a look at this threads which shows the evolution of ticketing rates from 2 to 4 month before your flight out. ARC' s survey shows that fares are falling from the 3-month level, with the lowest fares being between 3 and 13 week in the run-up to the event.
Begin your search more than 3 month in advance by monitoring your fares every single flight until they drop to a comfort zone. Generally, we cannot gamble on air fares! Vacation fare I suggest you search about 5 month before your flight and buy about 10-16 month before your flight. Example: The best rates for US Thanksgiving late November are before Labour Days (first weekend in September).
What makes the price of the same Economical Class tickets different: the general concept behind the tariff base code - the reasons why return trips can sometimes be less costly than single trips: single trips are usually more costly. As a rule, airline companies shut down the "discount economy" counter about 1-2 workingdays before departure.
You can use some other tips when making reservations with airlines. If you want to look for these kinds of ticket, use Sciplagged. Attempt to look for a flight with a link and make a reservation for a multi-city edition of this route, but make the stay 3 nights instead of 3 hrs - an example here. Is it possible to buy a flight (A-B-C) and just travel the B-C route?
Search for a ticket at a specific point in the week on a particular date or variant of a particular date.