Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly with an average 33% increase in price.
(avg. price over the last 2 weeks)
FAQs for booking flights from Illinois to Sumatra
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Sumatra.
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sumatra from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Sumatra with an airline and back to Illinois with another airline.
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sumatra from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.