Often the price of an international flight will vary with the time of year. If it's during high tourist season (like going to Spain in the summer), it will probably be more expensive than if you decide to travel in the offseason (like going to Spain in the winter). The day of departure is also important: Flying in the middle of the week is usually cheaper than flying on the weekend.
Check online for airlines that originate from your particular destination. General flight search engines based in the United States often do not include these foreign airlines in their searches. When you find them, check their prices on their websites or call them for more information. Luggage policies vary from airline to airline, so read these policies carefully. In general you are allowed at least one carry-on piece of luggage and two pieces of checked luggage without charge, so if you must bring luggage, stay within these limits. Going beyond these limits may be expensive, especially if the charge is in another currency. Be mindful of exchange rates when purchasing tickets and if you have to pay extra for your luggage.
After consulting your calendar and online search engines, it's wise to consult a travel agent. Many travel agents are privy to deals and discounts that are not available online. They will also be knowledgeable about hotels, transportation and places of interest in your destination. Consult a travel agent after you perform an extensive online search for flights. Sometimes, but not always, a travel agent can find a cheaper flight than you can.
If you are adventurous, fluent in English and have a bachelor's degree from an accredited university, teaching abroad may be a good way for you to secure a free trip to another country. Many countries, especially South Korea, are looking for native English speakers who are willing to teach English for one year. Schools in these countries will typically pay for all or most of the cost of travel. (Keep in mind that many schools may not reimburse you for extra luggage fees, so it would be best to pack light.) They will also cover your housing costs and pay you a reasonable salary.
