This week's budget trip math: Quito is the South America fare to price first

Three fare bands

Ten international fare targets

Five South America trend-and-value screens

• Quito: The guide puts hostel beds at $10–$18 and meals at $3–$6 each. Ecuador uses the U.S. dollar, which makes the budget easier to track; the Galápagos is a different, much more expensive trip.
• Bogotá: Going gives Colombia hostel rates of $12–$22 and meals of $4–$8. That makes Bogotá the lowest five-night subtotal in this set despite its higher ground budget than Quito.
• Lima: Peru's guide lists $10–$20 hostel beds and $3–$7 meals. The route page's $663 screen is the problem to solve, not the ground spend.
• Asunción: Paraguay's hostel range is $8–$15 and meals are $3–$6. The destination is cheap once you arrive, but Miami's current fare is not a quick weekend fare.
• Buenos Aires: Argentina's hostel range is $15–$25 and meals are $6–$12. The $976–$1,116 subtotal only starts to make sense if you stay longer than five nights or add a second city.

Booking timing that fits these routes

1. Start the international search two to eight months out. Going's July 31 booking guide gives that range for international flights and recommends starting one to three months earlier for peak season, holidays, and major events. Last-minute bargains are the exception; prices usually rise during the final three weeks.
2. Use September and October as the first flexible-date test. Going calls them strong value months after January and February. The route pages point in the same direction for this set: Quito shows September as its cheapest month, Bogotá October, and Lima February. Those are route-specific signals, not a guarantee for every airport.
3. Change the departure day before changing the booking day. Going finds Tuesday, Wednesday, and Saturday departures tend to be cheaper. NerdWallet's 2026 booking-day analysis says the day you buy matters far less than lead time, while its Expedia-based data finds Tuesday domestic departures about 14% cheaper than Sunday. For international flights, the day-of-week gap is smaller, so use a whole-month calendar instead of waiting for a mythical Tuesday sale.
4. Use the route page's own lead-time signal when it exists. KAYAK says booking at least two weeks ahead on Miami–Asunción saved around 11% versus last minute; four weeks on Indianapolis–Lima saved around 25%; four weeks on Boston–Riga saved around 36%; and seven weeks on San Francisco–Calgary saved around 52%. These are route-page estimates, not guarantees, but they are more useful than a blanket rule.
5. Set alerts at a number you would actually book. Use KAYAK's flight search for a route-and-date floor, and Going's flight alerts for deal notifications. For Quito from Fort Lauderdale, my first alert trigger is $450 roundtrip or lower because the current $479 screen is above KAYAK's $388–$427 typical field.
6. Keep the 24-hour safety valve in the right place. The U.S. Department of Transportation says an airline ticket bought at least seven days before departure must come with either a 24-hour cancellation/full-refund option or a 24-hour hold at the quoted price. Airlines do not have to offer both, and the rule does not cover bookings made through online travel agencies or other third-party agents. If you want that protection, check who is taking your payment before you click buy.

Route of the week: Fort Lauderdale–Quito