Go through your results for flights to Cali in Colombia with Netflights. The most popular airlines for this route are Lufthansa & United Airlines, with Lufthansa claiming the top spot. Although American Airlines usually has the best prices, it's best to double check what's available for your travel dates.
If these flights are too expensive, try searching for a different time of year. It's likely that prices for both flights and accommodation in Cali will be higher during December. Meanwhile, May is nearly always the cheapest time to fly. So if your dates are flexible, consider looking at different times of year.
There are 120 direct and indirect flights to Cali every week, operated by ten airlines. But if you're struggling to find flights to Cali that work for you, try looking at other airports in Colombia. We've compared 21 flights across the globe so far today, so there's bound to be one that suits you.
Looking at a few different departure airports will give you even more choice. See what you can find. And remember, it's best to book your flights in advance wherever possible.